diff --git a/.github/workflows/main-ci.yml b/.github/workflows/main-ci.yml
new file mode 100644
index 000000000..9bb7fcdf5
--- /dev/null
+++ b/.github/workflows/main-ci.yml
@@ -0,0 +1,50 @@
+name: Build
+
+on: [push, pull_request]
+
+jobs:
+    build:
+        name: Build
+        runs-on: ubuntu-latest
+
+        steps:
+            - uses: actions/checkout@v2
+
+            - name: Set up Java 8
+              uses: actions/setup-java@v1
+              with:
+                  java-version: 8
+
+            - name: Cache gradle dependencies
+              uses: actions/cache@v1
+              with:
+                  path: ~/.gradle/caches
+                  key: ${{ runner.os }}-gradle-${{ hashFiles('gradle.properties') }}
+                  restore-keys: |
+                      ${{ runner.os }}-gradle-
+
+            - name: Build with Gradle
+              run: ./gradlew build --no-daemon || ./gradlew build --no-daemon
+
+            - name: Upload Jar
+              uses: actions/upload-artifact@v1
+              with:
+                  name: CC-Tweaked
+                  path: build/libs
+
+            - name: Upload Coverage
+              run: bash <(curl -s https://codecov.io/bash)
+              continue-on-error: true
+
+            - name: Generate Java documentation stubs
+              run: ./gradlew luaJavadoc --no-daemon
+
+            - name: Lint Lua code
+              run: |
+                  test -d bin || mkdir bin
+                  test -f bin/illuaminate || wget -q -Obin/illuaminate https://squiddev.cc/illuaminate/linux-x86-64/illuaminate
+                  chmod +x bin/illuaminate
+                  bin/illuaminate lint
+
+            - name: Check whitespace
+              run: python3 tools/check-lines.py
diff --git a/.gitignore b/.gitignore
index 0b28ad333..02be23186 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,3 +15,4 @@
 .idea
 .gradle
 *.DS_Store
+.project
\ No newline at end of file
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 000000000..de2a843a9
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+	"java.configuration.updateBuildConfiguration": "automatic"
+}
\ No newline at end of file
diff --git a/README.md b/README.md
index 65b2c3ce2..ed957950c 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,9 @@
-# CC:T for Fabric
-# This is a 'complete' port
-*complete as in it runs and works-ish*
-I'm busy with other projects and so if anyone else wants to maintain this be my guest
+# CC:Restitched Patchwork
+# This is a Work In Progress Port
+*it runs and works-ish*
+
+## Reached Parity with CC:T 1.94.0
+
+THis is just a quick patchwork of my attempts at getting CC:R up to date with CC:T
+
+The changelog is located at [PatchWork.md](patchwork.md)
diff --git a/gradle.properties b/gradle.properties
index d728c1e8f..31c68add1 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -2,7 +2,7 @@
 org.gradle.jvmargs=-Xmx1G
 
 # Mod properties
-mod_version=1.91.2
+mod_version=1.94.0
 
 # Minecraft properties
 mc_version=1.16.2
diff --git a/patchwork.md b/patchwork.md
new file mode 100644
index 000000000..1e4b2208d
--- /dev/null
+++ b/patchwork.md
@@ -0,0 +1,313 @@
+# Just my list of things I have ported over
+
+Format for the changelog of ported stuff
+```
+commit    // Shows commit from CC:T
+commit2   // Shows a commit that is the same thing, just a clean up, only if right after
+Title     // Commit Title
+SubScript // Desc of commit
+```
+
+If a edit that is present in CC:T is not needed, I will skip over it.
+Any and all references to an issue number, are to be found on CC:T's repo. 
+
+Any commit that starts with `[Patchwork]` are purely edits made by my hand, and not based on other commits from CC:T, this is to help differentiate my changes from the official changes
+
+Lines that are found above a commit in this log like this one, (excluding this one) are comments about how i had to implement things that are not a simple 1:1 (excluding fabric/forge differences) conversion
+
+```md
+5155e18de279a193c558aa029963486fd1294769
+Added translation for Vietnamese
+Co-authored-by: Boom <boom@flyingpackets.net>
+```
+
+```
+7e121ff72f2b1504cd6af47b57500876682bac45
+ae6124d1f477487abab1858abde8c4ec49dfee3c
+Translations for Vienamese
+Co-authored-by: Boom <boom@flyingpackets.net>
+```
+
+```
+59de21eae29849988e77fad6bc335f5ce78dfec7
+Handle tabs when parsing JSON
+Fixes #539
+```
+
+```
+748ebbe66bf0a4239bde34f557e4b4b75d61d990
+Bump to 1.92.0
+A tiny release, but there's new features so it's technically a minor
+bump.
+```
+
+Cherry Picked because this update was partially related to forge updates rather than mod updates
+```
+8b4a01df27ff7f6fa9ffd9c2188c6e3166edd515
+Update to Minecraft 1.16.3
+
+I hope the Fabric folks now realise this is gonna be a race of who can
+update first :p. Either way, this was a very easy update - only changes
+were due to unrelated Forge changes.
+```
+
+```
+87393e8aef9ddfaca465d626ee7cff5ff499a7e8
+Fix additional `-` in docs
+
+Why isn't this automatically stripped! Bad squid.
+```
+
+```
+275ca58a82c627128a145a8754cbe32568536bd9
+HTTP rules now allow filtering by port
+
+The HTTP filtering system becomes even more complex! Though in this
+case, it's pretty minimal, and definitely worth doing.
+
+For instance, the following rule will allow connecting to localhost on
+port :8080.
+
+    [[http.rules]]
+    host = "127.0.0.1"
+    port = 8080
+    action = "allow"
+
+    # Other rules as before.
+
+Closes #540
+```
+
+The alterations in ColourUtils.java were not needed so they were not ported over
+```
+6f868849ab2f264508e12c184cc56f2632aaf5bc
+Use tags to check if something is a dye
+
+We half did this already, just needed to change a couple of checks.
+Closes #541.
+```
+
+```
+6cee4efcd3610536ee74330cd728f7371011e5a8
+Fix incorrect open container check
+
+Was this always broken, or did it happen in a Minecraft update? Don't
+know, but it's a very silly mistake either way. Fixes #544
+```
+
+```
+0832974725b2478c5227b81f82c35bbf03cf6aba
+Translations for Swedish
+
+Co-authored-by: David Isaksson <davidisaksson93@gmail.com>
+```
+
+```
+84036d97d99efd8762e0170002060ae3471508bf
+Fix io.open documentation
+
+Well, that was silly.
+```
+
+I set the default properties for computers as `Block.GLASS` and then set their strength to `2F` and their soundgroup to stone
+```
+8472112fc1eaad18ed6ed2c6c62b040fe421e81a
+Don't propagate adjacent redstone signals for computers (#549)
+
+Minecraft propagates "strong" redstone signals (such as those directly
+from comparators or repeaters) through solid blocks. This includes
+computers, which is a little annoying as it means one cannot feed
+redstone wire from one side and a repeater from another.
+
+This changes computers to not propagate strong redstone signals, in the
+same way transparent blocks like glass do.
+
+Closes #548.
+```
+
+```
+30d35883b83831900b34040f0131c7e06f5c3e52
+Fix my docs
+
+Thanks @plt-hokusai. Kinda embarrassing this slipped through - I
+evidently need to lint examples too.
+```
+
+```
+34a2c835d412c0d9e1fb20a42b7f2cd2738289c7
+Add color table to docs (#553)
+```
+
+All API Documentation updates, 
+`Not Needed` for this repo.
+``` 
+93068402a2ffec00eedb8fe2d859ebdc005a1989
+Document remaining OS functions (#554)
+
+01d81cb91da938836f953b290ad6b8fc87cb7e35
+Update illuaminate CSS for deprecation (#556)
+```
+
+``` 
+Not Needed
+4766833cf2d041ed179529eecb9402ad09b2b79b
+Bump JEI/crafttweaker versions
+
+In my defence, they weren't out when I started the 1.15 update.
+```
+
+``` 
+bf6053906dc6a3c7b0d40d5b097e745dce1f33bc
+Fix TBO norm issues on old GPUs
+```
+
+``` 
+Not Needed
+113b560a201dbdea9de2a2ef536bcce1d6e51978
+Update configuration to match latest illuaminate
+
+Ooooooh, it's all fancy now. Well, that or horrifically broken.
+```
+
+```
+c334423d42ba3b653ac3a8c27bce7970457f8f96
+Add function to get window visibility
+
+Closes #562
+
+Co-authored-by: devomaa <lmao@distruzione.org>
+```
+
+[WARN] Could not implement changes to the following files
+* `src/main/java/dan200/computercraft/ComputerCraft.java` < Structure too different, cannot find equivalent to alter
+* `src/main/java/dan200/computercraft/shared/Config.java` < Files Does not exist in this repo
+```
+84a6bb1cf3b0668ddc7d8c409a2477a42390e3f7
+Make generic peripherals on by default
+
+This is a long way away from "feature complete" as it were. However,
+it's definitely at a point where it's suitable for general usage - I'm
+happy with the API, and don't think I'm going to be breaking things any
+time soon.
+
+That said, things aren't exposed yet for Java-side public consumption. I
+was kinda waiting until working on Plethora to actually do that, but not
+sure if/when that'll happen.
+
+If someone else wants to work on an integration mod (or just adding
+integrations for their own mod), do get in touch and I can work out how
+to expose this.
+
+Closes #452
+```
+
+``` 
+Not Needed
+6aae4e576621090840724e094aa25e51696530fc
+Remove superfluous imports
+
+Hah, this is embarassing
+```
+
+[TODO] [M3R1-01] Code has been applied, players still dont get achievments
+``` 
+f6160bdc57b3d9850607c2c7c2ce9734b4963478
+Fix players not getting advancements when they own turtles
+
+When we construct a new ServerPlayerEntity (and thus TurtlePlayer), we
+get the current (global) advancement state and call .setPlayer() on it.
+
+As grantCriterion blocks FakePlayers from getting advancements, this
+means a player will no longer receive any advancements, as the "wrong"
+player object is being consulted.
+
+As a temporary work around, we attempt to restore the previous player to
+the advancement store. I'll try to upstream something into Forge to
+resolve this properly.
+
+Fixes #564
+```
+
+``` 
+17a932920711a5c0361a5048c9e0a5e7a58e6364
+Bump cct-javadoc version
+
+Documentation will now be sorted (somewhat) correctly!
+```
+
+```
+a6fcfb6af2fc1bef8ca3a19122c9267549202424
+Draw in-hand pocket computers with blending
+
+It might be worth switching to RenderTypes here, rather than a pure
+Tesselator, but this'll do for now.
+
+Fixes Zundrel/cc-tweaked-fabric#20.
+```
+
+``` 
+c58441b29c3715f092e7f3747bb3ec65ae5a3d29
+Various SNBT parsing improvements
+
+Correctly handle:
+ - Typed arrays ([I; 1, 2, 3])
+ - All suffixed numbers (1.2d)
+ - Single-quoted strings
+
+Fixes #559
+```
+
+``` 
+e2a635b6e5f5942f999213434054e06833c5cb06
+Dont fail when codecov is being finicky
+```
+
+```
+666e83cf4fd0eb327f465d5b919a708790f99b00
+Fix JSON objects failing to pass
+
+Maybe I should run the whole test suite, not just the things I think
+matter? Nah....
+```
+
+``` 
+741adfa7bb2b950d2851c3f0072d6a4769f22773
+
+Use blit to draw boxes, add colors.toBlit (#570)
+```
+
+``` 
+d13bd2cce8d102ad7f61f557e707d6fe3731bc37
+
+use arg[0] in all usage printouts (#571)
+```
+
+```
+74ac5bb3d17e5bee30643a5d6702696600c06229
+
+Bump to 1.94.0
+```
+
+[TODO] [M3R1-02] Zero Clue how to reimplement this in fabric.
+``` 
+c8aeddedd4ed430f9cb6428676ebb4fa39834182
+
+Auto-generate monitor models
+
+I didn't think it was worth it, and then I found myself needing to
+update a dozen of them. The code isn't especially pretty, but it works,
+so that's fine.
+
+Also fixes several issues with us using the wrong texture (closes #572).
+I've put together a wiki page[1] which describes each texture in a
+little more detail.
+
+[1] https://github.com/SquidDev-CC/CC-Tweaked/wiki/Monitor-texture-reference
+```
+
+7f90f2f7cadce0d5b9177b16626979591bce8137
+``` 
+Clean up some examples a little bit
+
+Would be good if they didn't crash and burn on entry :).
+```
diff --git a/src/main/java/dan200/computercraft/ComputerCraft.java b/src/main/java/dan200/computercraft/ComputerCraft.java
index a5d0ea5e8..68d49e580 100644
--- a/src/main/java/dan200/computercraft/ComputerCraft.java
+++ b/src/main/java/dan200/computercraft/ComputerCraft.java
@@ -126,10 +126,10 @@ public final class ComputerCraft implements ModInitializer {
 
     public static List<AddressRule> buildHttpRulesFromConfig(String[] blacklist, String[] whitelist) {
         return Stream.concat(Stream.of(blacklist)
-                        .map(x -> AddressRule.parse(x, Action.DENY.toPartial()))
+                        .map( x -> AddressRule.parse( x, null, Action.DENY.toPartial()))
                         .filter(Objects::nonNull),
                 Stream.of(whitelist)
-                        .map(x -> AddressRule.parse(x, Action.ALLOW.toPartial()))
+                        .map( x -> AddressRule.parse( x, null, Action.ALLOW.toPartial()))
                         .filter(Objects::nonNull))
                 .collect(Collectors.toList());
     }
diff --git a/src/main/java/dan200/computercraft/api/turtle/ITurtleAccess.java b/src/main/java/dan200/computercraft/api/turtle/ITurtleAccess.java
index f68182c20..a0ddbe9b7 100644
--- a/src/main/java/dan200/computercraft/api/turtle/ITurtleAccess.java
+++ b/src/main/java/dan200/computercraft/api/turtle/ITurtleAccess.java
@@ -135,7 +135,7 @@ public interface ITurtleAccess {
      *
      * @return This turtle's owner.
      */
-    @Nonnull
+    @Nullable
     GameProfile getOwningPlayer();
 
     /**
diff --git a/src/main/java/dan200/computercraft/client/render/ItemPocketRenderer.java b/src/main/java/dan200/computercraft/client/render/ItemPocketRenderer.java
index 7d77764b5..85d74e169 100644
--- a/src/main/java/dan200/computercraft/client/render/ItemPocketRenderer.java
+++ b/src/main/java/dan200/computercraft/client/render/ItemPocketRenderer.java
@@ -95,6 +95,7 @@ public final class ItemPocketRenderer extends ItemMapLikeRenderer {
     }
 
     private static void renderFrame(Matrix4f transform, ComputerFamily family, int colour, int width, int height) {
+        RenderSystem.enableBlend();
         MinecraftClient.getInstance()
                        .getTextureManager()
                        .bindTexture(colour != -1 ? ComputerBorderRenderer.BACKGROUND_COLOUR : ComputerBorderRenderer.getTexture(family));
@@ -113,7 +114,6 @@ public final class ItemPocketRenderer extends ItemMapLikeRenderer {
     }
 
     private static void renderLight(Matrix4f transform, int colour, int width, int height) {
-        RenderSystem.enableBlend();
         RenderSystem.disableTexture();
 
         float r = ((colour >>> 16) & 0xFF) / 255.0f;
diff --git a/src/main/java/dan200/computercraft/core/apis/http/CheckUrl.java b/src/main/java/dan200/computercraft/core/apis/http/CheckUrl.java
index 2ba2b3ea4..7ff1421db 100644
--- a/src/main/java/dan200/computercraft/core/apis/http/CheckUrl.java
+++ b/src/main/java/dan200/computercraft/core/apis/http/CheckUrl.java
@@ -21,14 +21,14 @@ public class CheckUrl extends Resource<CheckUrl> {
     private static final String EVENT = "http_check";
     private final IAPIEnvironment environment;
     private final String address;
-    private final String host;
+    private final URI uri;
     private Future<?> future;
 
     public CheckUrl(ResourceGroup<CheckUrl> limiter, IAPIEnvironment environment, String address, URI uri) {
         super(limiter);
         this.environment = environment;
         this.address = address;
-        this.host = uri.getHost();
+        this.uri = uri;
     }
 
     public void run() {
@@ -45,8 +45,9 @@ public class CheckUrl extends Resource<CheckUrl> {
         }
 
         try {
-            InetSocketAddress netAddress = NetworkUtils.getAddress(this.host, 80, false);
-            NetworkUtils.getOptions(this.host, netAddress);
+            boolean ssl = uri.getScheme().equalsIgnoreCase( "https" );
+            InetSocketAddress netAddress = NetworkUtils.getAddress( uri, ssl );
+            NetworkUtils.getOptions( uri.getHost(), netAddress );
 
             if (this.tryClose()) {
                 this.environment.queueEvent(EVENT, this.address, true);
diff --git a/src/main/java/dan200/computercraft/core/apis/http/NetworkUtils.java b/src/main/java/dan200/computercraft/core/apis/http/NetworkUtils.java
index a91c9a559..5619dbacb 100644
--- a/src/main/java/dan200/computercraft/core/apis/http/NetworkUtils.java
+++ b/src/main/java/dan200/computercraft/core/apis/http/NetworkUtils.java
@@ -7,6 +7,7 @@
 package dan200.computercraft.core.apis.http;
 
 import java.net.InetSocketAddress;
+import java.net.URI;
 import java.security.KeyStore;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.SynchronousQueue;
@@ -94,6 +95,21 @@ public final class NetworkUtils {
         }
     }
 
+    /**
+     * Create a {@link InetSocketAddress} from a {@link java.net.URI}.
+     *
+     * Note, this may require a DNS lookup, and so should not be executed on the main CC thread.
+     *
+     * @param uri The URI to fetch.
+     * @param ssl Whether to connect with SSL. This is used to find the default port if not otherwise specified.
+     * @return The resolved address.
+     * @throws HTTPRequestException If the host is not malformed.
+     */
+    public static InetSocketAddress getAddress( URI uri, boolean ssl ) throws HTTPRequestException
+    {
+        return getAddress( uri.getHost(), uri.getPort(), ssl );
+    }
+
     /**
      * Create a {@link InetSocketAddress} from the resolved {@code host} and port.
      *
@@ -125,7 +141,7 @@ public final class NetworkUtils {
      * @throws HTTPRequestException If the host is not permitted
      */
     public static Options getOptions(String host, InetSocketAddress address) throws HTTPRequestException {
-        Options options = AddressRule.apply(ComputerCraft.httpRules, host, address.getAddress());
+        Options options = AddressRule.apply( ComputerCraft.httpRules, host, address );
         if (options.action == Action.DENY) {
             throw new HTTPRequestException("Domain not permitted");
         }
diff --git a/src/main/java/dan200/computercraft/core/apis/http/options/AddressRule.java b/src/main/java/dan200/computercraft/core/apis/http/options/AddressRule.java
index 6631193d3..c8d2017b8 100644
--- a/src/main/java/dan200/computercraft/core/apis/http/options/AddressRule.java
+++ b/src/main/java/dan200/computercraft/core/apis/http/options/AddressRule.java
@@ -8,6 +8,7 @@ package dan200.computercraft.core.apis.http.options;
 
 import java.net.Inet6Address;
 import java.net.InetAddress;
+import java.net.InetSocketAddress;
 import java.util.regex.Pattern;
 
 import javax.annotation.Nonnull;
@@ -26,15 +27,22 @@ public final class AddressRule {
     public static final int WEBSOCKET_MESSAGE = 128 * 1024;
     private final HostRange ip;
     private final Pattern domainPattern;
+    private final Integer port;
     private final PartialOptions partial;
-    private AddressRule(@Nullable HostRange ip, @Nullable Pattern domainPattern, @Nonnull PartialOptions partial) {
+	private AddressRule(
+        @Nullable HostRange ip,
+        @Nullable Pattern domainPattern,
+        @Nullable Integer port,
+        @Nonnull PartialOptions partial )
+	{
         this.ip = ip;
         this.domainPattern = domainPattern;
         this.partial = partial;
+		this.port = port;
     }
 
     @Nullable
-    public static AddressRule parse(String filter, @Nonnull PartialOptions partial) {
+    public static AddressRule parse( String filter, @Nullable Integer port, @Nonnull PartialOptions partial ) {
         int cidr = filter.indexOf('/');
         if (cidr >= 0) {
             String addressStr = filter.substring(0, cidr);
@@ -73,14 +81,14 @@ public final class AddressRule {
                 size -= 8;
             }
 
-            return new AddressRule(new HostRange(minBytes, maxBytes), null, partial);
+            return new AddressRule(new HostRange(minBytes, maxBytes), null, port, partial);
         } else {
             Pattern pattern = Pattern.compile("^\\Q" + filter.replaceAll("\\*", "\\\\E.*\\\\Q") + "\\E$");
-            return new AddressRule(null, pattern, partial);
+            return new AddressRule(null, pattern, port, partial);
         }
     }
 
-    public static Options apply(Iterable<? extends AddressRule> rules, String domain, InetAddress address) {
+    public static Options apply(Iterable<? extends AddressRule> rules, String domain, InetSocketAddress address) {
         PartialOptions options = null;
         boolean hasMany = false;
 
@@ -108,11 +116,14 @@ public final class AddressRule {
     /**
      * Determine whether the given address matches a series of patterns.
      *
-     * @param domain The domain to match
-     * @param address The address to check.
+     * @param domain        The domain to match
+     * @param socketAddress The address to check.
      * @return Whether it matches any of these patterns.
      */
-    private boolean matches(String domain, InetAddress address) {
+    private boolean matches(String domain, InetSocketAddress socketAddress) {
+		InetAddress address = socketAddress.getAddress();
+        if( port != null && port != socketAddress.getPort() ) return false;
+
         if (this.domainPattern != null) {
             if (this.domainPattern.matcher(domain)
                                   .matches()) {
diff --git a/src/main/java/dan200/computercraft/core/apis/http/options/AddressRuleConfig.java b/src/main/java/dan200/computercraft/core/apis/http/options/AddressRuleConfig.java
index 8dc11dca0..c520d9675 100644
--- a/src/main/java/dan200/computercraft/core/apis/http/options/AddressRuleConfig.java
+++ b/src/main/java/dan200/computercraft/core/apis/http/options/AddressRuleConfig.java
@@ -9,6 +9,8 @@ package dan200.computercraft.core.apis.http.options;
 public class AddressRuleConfig {
     // TODO haha config is gone, do fix
 
+    // TODO FIGURE OUT WHY THE HELL THE PREVIOUS GUY HAD TO COMMENT THIS OUT
+
     //    public static UnmodifiableConfig makeRule( String host, Action action )
     //    {
     //        CommentedConfig config = InMemoryCommentedFormat.defaultInstance().createConfig( ConcurrentHashMap::new );
@@ -39,17 +41,19 @@ public class AddressRuleConfig {
     //    {
     //        String hostObj = get( builder, "host", String.class ).orElse( null );
     //        return hostObj != null && checkEnum( builder, "action", Action.class )
+    //            && check( builder, "port", Number.class )
     //            && check( builder, "timeout", Number.class )
     //            && check( builder, "max_upload", Number.class )
     //            && check( builder, "max_download", Number.class )
     //            && check( builder, "websocket_message", Number.class )
-    //            && AddressRule.parse( hostObj, PartialOptions.DEFAULT ) != null;
+    //            && AddressRule.parse( hostObj, port, PartialOptions.DEFAULT ) != null;
     //    }
     //
     //    @Nullable
     //    public static AddressRule parseRule( UnmodifiableConfig builder )
     //    {
     //        String hostObj = get( builder, "host", String.class ).orElse( null );
+    //        Integer port = get( builder, "port", Number.class ).map( Number::intValue ).orElse( null );
     //        if( hostObj == null ) return null;
     //
     //        Action action = getEnum( builder, "action", Action.class ).orElse( null );
@@ -66,7 +70,7 @@ public class AddressRuleConfig {
     //            websocketMessage
     //        );
     //
-    //        return AddressRule.parse( hostObj, options );
+    //        return AddressRule.parse( hostObj, port, options );
     //    }
     //
     //    private static <T> boolean check( UnmodifiableConfig config, String field, Class<T> klass )
diff --git a/src/main/java/dan200/computercraft/core/apis/http/request/HttpRequest.java b/src/main/java/dan200/computercraft/core/apis/http/request/HttpRequest.java
index 6e6a315f5..7e7645004 100644
--- a/src/main/java/dan200/computercraft/core/apis/http/request/HttpRequest.java
+++ b/src/main/java/dan200/computercraft/core/apis/http/request/HttpRequest.java
@@ -131,7 +131,7 @@ public class HttpRequest extends Resource<HttpRequest> {
         try {
             boolean ssl = uri.getScheme()
                              .equalsIgnoreCase("https");
-            InetSocketAddress socketAddress = NetworkUtils.getAddress(uri.getHost(), uri.getPort(), ssl);
+            InetSocketAddress socketAddress = NetworkUtils.getAddress(uri, ssl);
             Options options = NetworkUtils.getOptions(uri.getHost(), socketAddress);
             SslContext sslContext = ssl ? NetworkUtils.getSslContext() : null;
 
diff --git a/src/main/java/dan200/computercraft/core/apis/http/websocket/Websocket.java b/src/main/java/dan200/computercraft/core/apis/http/websocket/Websocket.java
index 493ac3d99..1014c2e85 100644
--- a/src/main/java/dan200/computercraft/core/apis/http/websocket/Websocket.java
+++ b/src/main/java/dan200/computercraft/core/apis/http/websocket/Websocket.java
@@ -117,7 +117,7 @@ public class Websocket extends Resource<Websocket> {
             boolean ssl = this.uri.getScheme()
                                   .equalsIgnoreCase("wss");
 
-            InetSocketAddress socketAddress = NetworkUtils.getAddress(this.uri.getHost(), this.uri.getPort(), ssl);
+            InetSocketAddress socketAddress = NetworkUtils.getAddress(uri, ssl);
             Options options = NetworkUtils.getOptions(this.uri.getHost(), socketAddress);
             SslContext sslContext = ssl ? NetworkUtils.getSslContext() : null;
 
diff --git a/src/main/java/dan200/computercraft/shared/ComputerCraftRegistry.java b/src/main/java/dan200/computercraft/shared/ComputerCraftRegistry.java
index 8dc8357b9..e2aa3763e 100644
--- a/src/main/java/dan200/computercraft/shared/ComputerCraftRegistry.java
+++ b/src/main/java/dan200/computercraft/shared/ComputerCraftRegistry.java
@@ -55,6 +55,7 @@ import dan200.computercraft.shared.turtle.items.ItemTurtle;
 import dan200.computercraft.shared.turtle.upgrades.*;
 import dan200.computercraft.shared.util.FixedPointTileEntityType;
 
+import net.minecraft.block.AbstractBlock;
 import net.minecraft.block.Block;
 import net.minecraft.block.Blocks;
 import net.minecraft.block.Material;
@@ -68,6 +69,7 @@ import net.minecraft.item.ItemGroup;
 import net.minecraft.item.Items;
 import net.minecraft.screen.ScreenHandler;
 import net.minecraft.screen.ScreenHandlerType;
+import net.minecraft.sound.BlockSoundGroup;
 import net.minecraft.util.Identifier;
 import net.minecraft.util.registry.Registry;
 
@@ -121,8 +123,12 @@ public final class ComputerCraftRegistry {
         public static final BlockCable CABLE = register("cable", new BlockCable(emProperties()));
 
         private static Block.Settings properties() {
-            return FabricBlockSettings.copyOf(Blocks.STONE)
-                                      .strength(2);
+            //return FabricBlockSettings.copyOf(Blocks.GLASS)
+              //                        .strength(2);
+            return AbstractBlock.Settings.of(Material.GLASS)
+                .strength(2F)
+                .sounds(BlockSoundGroup.STONE)
+                .nonOpaque();
         }
 
         private static Block.Settings turtleProperties() {
diff --git a/src/main/java/dan200/computercraft/shared/computer/apis/CommandAPI.java b/src/main/java/dan200/computercraft/shared/computer/apis/CommandAPI.java
index 02cb8ab44..ae5955e70 100644
--- a/src/main/java/dan200/computercraft/shared/computer/apis/CommandAPI.java
+++ b/src/main/java/dan200/computercraft/shared/computer/apis/CommandAPI.java
@@ -117,7 +117,6 @@ public class CommandAPI implements ILuaAPI {
      * @param command The command to execute.
      * @return The "task id". When this command has been executed, it will queue a `task_complete` event with a matching id.
      * @throws LuaException (hidden) If the task cannot be created.
-     * @cc.tparam string command The command to execute.
      * @cc.usage Asynchronously sets the block above the computer to stone.
      *     <pre>
      *     commands.execAsync("~ ~1 ~ minecraft:stone")
diff --git a/src/main/java/dan200/computercraft/shared/peripheral/diskdrive/DiskDrivePeripheral.java b/src/main/java/dan200/computercraft/shared/peripheral/diskdrive/DiskDrivePeripheral.java
index d1a6631fd..f5065e6cc 100644
--- a/src/main/java/dan200/computercraft/shared/peripheral/diskdrive/DiskDrivePeripheral.java
+++ b/src/main/java/dan200/computercraft/shared/peripheral/diskdrive/DiskDrivePeripheral.java
@@ -155,7 +155,8 @@ public class DiskDrivePeripheral implements IPeripheral {
     /**
      * Returns the title of the inserted audio disk.
      *
-     * @return The title of the audio, or {@code nil} if no audio disk is inserted.
+     * @return The title of the audio, or {@code false} if no audio disk is inserted.
+     * @cc.treturn string|nil|false The title of the audio, {@code false} if no disk is inserted, or {@code nil} if the disk has no audio.
      */
     @LuaFunction
     @Nullable
diff --git a/src/main/java/dan200/computercraft/shared/peripheral/monitor/ClientMonitor.java b/src/main/java/dan200/computercraft/shared/peripheral/monitor/ClientMonitor.java
index 05b5cb99b..5fce19bc1 100644
--- a/src/main/java/dan200/computercraft/shared/peripheral/monitor/ClientMonitor.java
+++ b/src/main/java/dan200/computercraft/shared/peripheral/monitor/ClientMonitor.java
@@ -80,7 +80,7 @@ public final class ClientMonitor extends ClientTerminal {
             GL15.glBufferData(GL31.GL_TEXTURE_BUFFER, 0, GL15.GL_STATIC_DRAW);
             this.tboTexture = GlStateManager.genTextures();
             GL11.glBindTexture(GL31.GL_TEXTURE_BUFFER, this.tboTexture);
-            GL31.glTexBuffer(GL31.GL_TEXTURE_BUFFER, GL30.GL_R8, this.tboBuffer);
+            GL31.glTexBuffer(GL31.GL_TEXTURE_BUFFER, GL30.GL_R8UI, this.tboBuffer);
             GL11.glBindTexture(GL31.GL_TEXTURE_BUFFER, 0);
 
             GlStateManager.bindBuffers(GL31.GL_TEXTURE_BUFFER, 0);
diff --git a/src/main/java/dan200/computercraft/shared/peripheral/printer/ContainerPrinter.java b/src/main/java/dan200/computercraft/shared/peripheral/printer/ContainerPrinter.java
index 52d3757c2..dd9e9d761 100644
--- a/src/main/java/dan200/computercraft/shared/peripheral/printer/ContainerPrinter.java
+++ b/src/main/java/dan200/computercraft/shared/peripheral/printer/ContainerPrinter.java
@@ -15,7 +15,6 @@ import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.entity.player.PlayerInventory;
 import net.minecraft.inventory.Inventory;
 import net.minecraft.inventory.SimpleInventory;
-import net.minecraft.item.DyeItem;
 import net.minecraft.item.ItemStack;
 import net.minecraft.screen.ArrayPropertyDelegate;
 import net.minecraft.screen.PropertyDelegate;
@@ -87,7 +86,7 @@ public class ContainerPrinter extends ScreenHandler {
             }
         } else {
             // Transfer from inventory to printer
-            if (stack.getItem() instanceof DyeItem) {
+            if( TilePrinter.isInk( stack ) ) {
                 if (!this.insertItem(stack, 0, 1, false)) {
                     return ItemStack.EMPTY;
                 }
diff --git a/src/main/java/dan200/computercraft/shared/peripheral/printer/TilePrinter.java b/src/main/java/dan200/computercraft/shared/peripheral/printer/TilePrinter.java
index a6dbfbbab..03fa0a1e9 100644
--- a/src/main/java/dan200/computercraft/shared/peripheral/printer/TilePrinter.java
+++ b/src/main/java/dan200/computercraft/shared/peripheral/printer/TilePrinter.java
@@ -278,8 +278,8 @@ public final class TilePrinter extends TileGeneric implements DefaultSidedInvent
         }
     }
 
-    private static boolean isInk(@Nonnull ItemStack stack) {
-        return stack.getItem() instanceof DyeItem;
+    static boolean isInk(@Nonnull ItemStack stack) {
+        return ColourUtils.getStackColour( stack ) != null;
     }
 
     @Nonnull
@@ -380,9 +380,8 @@ public final class TilePrinter extends TileGeneric implements DefaultSidedInvent
 
     private boolean inputPage() {
         ItemStack inkStack = this.m_inventory.get(0);
-        if (!isInk(inkStack)) {
-            return false;
-        }
+        DyeColor dye = ColourUtils.getStackColour( inkStack );
+        if( dye == null ) return false;
 
         for (int i = 1; i < 7; i++) {
             ItemStack paperStack = this.m_inventory.get(i);
@@ -391,8 +390,7 @@ public final class TilePrinter extends TileGeneric implements DefaultSidedInvent
             }
 
             // Setup the new page
-            DyeColor dye = ColourUtils.getStackColour(inkStack);
-            this.m_page.setTextColour(dye != null ? dye.getId() : 15);
+            m_page.setTextColour( dye.getId() );
 
             this.m_page.clear();
             if (paperStack.getItem() instanceof ItemPrintout) {
diff --git a/src/main/java/dan200/computercraft/shared/turtle/core/TurtleBrain.java b/src/main/java/dan200/computercraft/shared/turtle/core/TurtleBrain.java
index e4327fe94..c1fdc2a5d 100644
--- a/src/main/java/dan200/computercraft/shared/turtle/core/TurtleBrain.java
+++ b/src/main/java/dan200/computercraft/shared/turtle/core/TurtleBrain.java
@@ -19,6 +19,7 @@ import java.util.UUID;
 import java.util.concurrent.TimeUnit;
 
 import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
 
 import com.google.common.base.Objects;
 import com.mojang.authlib.GameProfile;
@@ -341,7 +342,7 @@ public class TurtleBrain implements ITurtleAccess {
         }
     }
 
-    @Nonnull
+    @Nullable
     @Override
     public GameProfile getOwningPlayer() {
         return this.m_owningPlayer;
diff --git a/src/main/java/dan200/computercraft/shared/turtle/core/TurtlePlayer.java b/src/main/java/dan200/computercraft/shared/turtle/core/TurtlePlayer.java
index 23e86ad76..c644bb643 100644
--- a/src/main/java/dan200/computercraft/shared/turtle/core/TurtlePlayer.java
+++ b/src/main/java/dan200/computercraft/shared/turtle/core/TurtlePlayer.java
@@ -33,6 +33,7 @@ import net.minecraft.inventory.Inventory;
 import net.minecraft.item.ItemStack;
 import net.minecraft.screen.NamedScreenHandlerFactory;
 import net.minecraft.server.world.ServerWorld;
+import net.minecraft.server.network.ServerPlayerEntity;
 import net.minecraft.util.ActionResult;
 import net.minecraft.util.Hand;
 import net.minecraft.util.math.BlockPos;
@@ -42,22 +43,41 @@ import net.minecraft.util.math.Vec3d;
 @SuppressWarnings ("EntityConstructor")
 public final class TurtlePlayer extends FakePlayer {
     private static final GameProfile DEFAULT_PROFILE = new GameProfile(UUID.fromString("0d0c4ca0-4ff1-11e4-916c-0800200c9a66"), "[ComputerCraft]");
-
-    private TurtlePlayer(ITurtleAccess turtle) {
-        super((ServerWorld) turtle.getWorld(), getProfile(turtle.getOwningPlayer()));
-        this.networkHandler = new FakeNetHandler(this);
-        this.setState(turtle);
+// TODO [M3R1-01] Fix Turtle not giving player achievement for actions
+    private TurtlePlayer( ServerWorld world, GameProfile name )
+    {
+        super( world, name );
     }
 
+    private static TurtlePlayer create( ITurtleAccess turtle )
+    {
+        ServerWorld world = (ServerWorld) turtle.getWorld();
+        GameProfile profile = turtle.getOwningPlayer();
+
+        TurtlePlayer player = new TurtlePlayer( world, getProfile( profile ) );
+        player.networkHandler = new FakeNetHandler( player );
+        player.setState( turtle );
+
+        if( profile != null && profile.getId() != null )
+        {
+            // Constructing a player overrides the "active player" variable in advancements. As fake players cannot
+            // get advancements, this prevents a normal player who has placed a turtle from getting advancements.
+            // We try to locate the "actual" player and restore them.
+            ServerPlayerEntity actualPlayer = world.getServer().getPlayerManager().getPlayer(player.getUuid());
+            if( actualPlayer != null ) player.getAdvancementTracker().setOwner(actualPlayer);
+        }
+
+        return player;
+        }
+
     private static GameProfile getProfile(@Nullable GameProfile profile) {
         return profile != null && profile.isComplete() ? profile : DEFAULT_PROFILE;
     }
 
     private void setState(ITurtleAccess turtle) {
-        if (this.currentScreenHandler != null) {
+        if (this.currentScreenHandler != playerScreenHandler) {
             ComputerCraft.log.warn("Turtle has open container ({})", this.currentScreenHandler);
-            this.currentScreenHandler.close(this);
-            this.currentScreenHandler = null;
+            closeCurrentScreen();
         }
 
         BlockPos position = turtle.getPosition();
@@ -71,14 +91,17 @@ public final class TurtlePlayer extends FakePlayer {
     }
 
     public static TurtlePlayer get(ITurtleAccess access) {
-        if (!(access instanceof TurtleBrain)) {
-            return new TurtlePlayer(access);
-        }
+         ServerWorld world = (ServerWorld) access.getWorld();
+        if( !(access instanceof TurtleBrain) ) return create( access );
+
+         /*if (!(access instanceof TurtleBrain)) {
+            return new TurtlePlayer(world, access.getOwningPlayer());
+        }*/
 
         TurtleBrain brain = (TurtleBrain) access;
         TurtlePlayer player = brain.m_cachedPlayer;
         if (player == null || player.getGameProfile() != getProfile(access.getOwningPlayer()) || player.getEntityWorld() != access.getWorld()) {
-            player = brain.m_cachedPlayer = new TurtlePlayer(brain);
+            player = brain.m_cachedPlayer = create(brain);
         } else {
             player.setState(access);
         }
diff --git a/src/main/java/dan200/computercraft/shared/util/DropConsumer.java b/src/main/java/dan200/computercraft/shared/util/DropConsumer.java
index ffca60fc3..c58a5727b 100644
--- a/src/main/java/dan200/computercraft/shared/util/DropConsumer.java
+++ b/src/main/java/dan200/computercraft/shared/util/DropConsumer.java
@@ -35,8 +35,6 @@ public final class DropConsumer {
         dropWorld = new WeakReference<>(entity.world);
         dropPos = null;
         dropBounds = new Box(entity.getBlockPos()).expand(2, 2, 2);
-
-        // entity.getScale().captureDrops( new ArrayList<>() );
     }
 
     public static void set(World world, BlockPos pos, Function<ItemStack, ItemStack> consumer) {
diff --git a/src/main/resources/assets/computercraft/lang/sv_se.json b/src/main/resources/assets/computercraft/lang/sv_se.json
index b71e4fecb..1afe76b56 100644
--- a/src/main/resources/assets/computercraft/lang/sv_se.json
+++ b/src/main/resources/assets/computercraft/lang/sv_se.json
@@ -1,14 +1,14 @@
 {
     "block.computercraft.computer_normal": "Dator",
     "block.computercraft.computer_advanced": "Avancerad Dator",
-    "block.computercraft.computer_command": "Kommando Dator",
+    "block.computercraft.computer_command": "Kommandodator",
     "block.computercraft.disk_drive": "Diskettläsare",
     "block.computercraft.printer": "Skrivare",
     "block.computercraft.speaker": "Högtalare",
     "block.computercraft.monitor_normal": "Skärm",
     "block.computercraft.monitor_advanced": "Avancerad Skärm",
     "block.computercraft.wireless_modem_normal": "Trådlöst Modem",
-    "block.computercraft.wireless_modem_advanced": "Ender Modem",
+    "block.computercraft.wireless_modem_advanced": "Endermodem",
     "block.computercraft.wired_modem": "Trådat Modem",
     "block.computercraft.cable": "Nätverkskabel",
     "block.computercraft.wired_modem_full": "Trådat Modem",
@@ -38,5 +38,76 @@
     "upgrade.computercraft.speaker.adjective": "Högljudd",
     "chat.computercraft.wired_modem.peripheral_connected": "Kringutrustning \"%s\" är kopplad till nätverket",
     "chat.computercraft.wired_modem.peripheral_disconnected": "Kringutrustning \"%s\" är frånkopplad från nätverket",
-    "gui.computercraft.tooltip.copy": "Kopiera till urklipp"
+    "gui.computercraft.tooltip.copy": "Kopiera till urklipp",
+    "gui.computercraft.tooltip.disk_id": "Diskett-ID: %s",
+    "gui.computercraft.tooltip.computer_id": "Dator-ID: %s",
+    "tracking_field.computercraft.coroutines_dead.name": "Coroutines borttagna",
+    "tracking_field.computercraft.coroutines_created.name": "Coroutines skapade",
+    "tracking_field.computercraft.websocket_outgoing.name": "Websocket utgående",
+    "tracking_field.computercraft.websocket_incoming.name": "Websocket ingående",
+    "tracking_field.computercraft.http_download.name": "HTTP-nedladdning",
+    "tracking_field.computercraft.http_upload.name": "HTTP-uppladdning",
+    "tracking_field.computercraft.http.name": "HTTP-förfrågningar",
+    "tracking_field.computercraft.turtle.name": "Turtle-operationer",
+    "tracking_field.computercraft.fs.name": "Filsystemoperationer",
+    "tracking_field.computercraft.peripheral.name": "Samtal till kringutrustning",
+    "tracking_field.computercraft.server_time.name": "Serveraktivitetstid",
+    "tracking_field.computercraft.server_count.name": "Antal serveruppgifter",
+    "tracking_field.computercraft.max.name": "Max tid",
+    "tracking_field.computercraft.average.name": "Genomsnittlig tid",
+    "tracking_field.computercraft.total.name": "Total tid",
+    "tracking_field.computercraft.tasks.name": "Uppgifter",
+    "argument.computercraft.argument_expected": "Argument förväntas",
+    "argument.computercraft.tracking_field.no_field": "Okänt fält '%s'",
+    "argument.computercraft.computer.many_matching": "Flera datorer matchar '%s' (%s träffar)",
+    "argument.computercraft.computer.no_matching": "Inga datorer matchar '%s'",
+    "commands.computercraft.generic.additional_rows": "%d ytterligare rader…",
+    "commands.computercraft.generic.exception": "Ohanterat felfall (%s)",
+    "commands.computercraft.generic.no": "N",
+    "commands.computercraft.generic.yes": "J",
+    "commands.computercraft.generic.position": "%s, %s, %s",
+    "commands.computercraft.generic.no_position": "<no pos>",
+    "commands.computercraft.queue.desc": "Skicka ett computer_command event till en kommandodator, skicka vidare ytterligare argument. Detta är mestadels utformat för kartmarkörer som fungerar som en mer datorvänlig version av /trigger. Alla spelare kan köra kommandot, vilket sannolikt skulle göras genom en textkomponents klick-event.",
+    "commands.computercraft.queue.synopsis": "Skicka ett computer_command event till en kommandodator",
+    "commands.computercraft.reload.done": "Konfiguration omladdad",
+    "commands.computercraft.reload.desc": "Ladda om ComputerCrafts konfigurationsfil",
+    "commands.computercraft.reload.synopsis": "Ladda om ComputerCrafts konfigurationsfil",
+    "commands.computercraft.track.dump.computer": "Dator",
+    "commands.computercraft.track.dump.no_timings": "Inga tidtagningar tillgängliga",
+    "commands.computercraft.track.dump.desc": "Dumpa de senaste resultaten av datorspårning.",
+    "commands.computercraft.track.dump.synopsis": "Dumpa de senaste spårningsresultaten",
+    "commands.computercraft.track.stop.not_enabled": "Spårar för tillfället inga datorer",
+    "commands.computercraft.track.stop.action": "Klicka för att stoppa spårning",
+    "commands.computercraft.track.stop.desc": "Stoppa spårning av alla datorers körtider och eventräkningar",
+    "commands.computercraft.track.stop.synopsis": "Stoppa spårning för alla datorer",
+    "commands.computercraft.track.start.stop": "Kör %s för att stoppa spårning och visa resultaten",
+    "commands.computercraft.track.start.desc": "Börja spåra alla dators körtider och eventräkningar. Detta kommer återställa resultaten från tidigare körningar.",
+    "commands.computercraft.track.start.synopsis": "Starta spårning för alla datorer",
+    "commands.computercraft.track.desc": "Spåra hur länge datorer exekverar, och även hur många event de hanterar. Detta presenterar information på liknande sätt som /forge track och kan vara användbart för att undersöka lagg.",
+    "commands.computercraft.track.synopsis": "Spåra körningstider för denna dator.",
+    "commands.computercraft.view.not_player": "Kan inte öppna terminalen för en ickespelare",
+    "commands.computercraft.view.action": "Titta på denna dator",
+    "commands.computercraft.view.desc": "Öppna datorns terminal för att möjligöra fjärrstyrning. Detta ger inte tillgång till turtlens inventory. Du kan ange en dators instans-id (t.ex. 123) eller dator-id (t.ex. #123).",
+    "commands.computercraft.view.synopsis": "Titta på datorns terminal.",
+    "commands.computercraft.tp.not_there": "Kan inte hitta datorn i världen",
+    "commands.computercraft.tp.not_player": "Kan inte öppna terminalen för en ickespelare",
+    "commands.computercraft.tp.action": "Teleportera till den här datorn",
+    "commands.computercraft.tp.desc": "Teleportera till datorns position. Du kan ange en dators instans-id (t.ex. 123), dator-id (t.ex. #123) eller etikett (t.ex. \"@Min dator\").",
+    "commands.computercraft.tp.synopsis": "Teleportera till en specifik dator.",
+    "commands.computercraft.turn_on.done": "Startade %s/%s datorer",
+    "commands.computercraft.turn_on.desc": "Starta de listade datorerna eller alla om ingen anges. Du kan ange en dators instans-id (t.ex. 123), dator-id (t.ex. #123) eller etikett (t.ex. \"@Min dator\").",
+    "commands.computercraft.turn_on.synopsis": "Starta på datorer på distans.",
+    "commands.computercraft.shutdown.done": "Stängde av %s/%s datorer",
+    "commands.computercraft.dump.desc": "Visa status för alla datorer eller specifik information för en dator. Du kan ange en dators instans-id (t.ex. 123), dator-id (t.ex. #123) eller etikett (t.ex. \"@Min dator\").",
+    "commands.computercraft.shutdown.desc": "Stäng av de listade datorerna eller alla om ingen anges. Du kan ange en dators instans-id (t.ex. 123), dator-id (t.ex. #123) eller etikett (t.ex. \"@Min dator\").",
+    "commands.computercraft.shutdown.synopsis": "Stäng av datorer på distans.",
+    "commands.computercraft.dump.action": "Visa mer information om den här datorn",
+    "commands.computercraft.dump.synopsis": "Visa status för datorer.",
+    "commands.computercraft.help.no_command": "Inget sådant kommando '%s'",
+    "commands.computercraft.help.no_children": "%s har inget underkommando",
+    "commands.computercraft.help.desc": "Visa detta hjälpmeddelande",
+    "commands.computercraft.help.synopsis": "Tillhandahåll hjälp för ett specifikt kommando",
+    "commands.computercraft.desc": "/computercraft kommandot tillhandahåller olika debugging- och administrationsverktyg för att kontrollera och interagera med datorer.",
+    "commands.computercraft.synopsis": "Olika kommandon för att kontrollera datorer.",
+    "itemGroup.computercraft": "ComputerCraft"
 }
diff --git a/src/main/resources/assets/computercraft/lang/vi.json b/src/main/resources/assets/computercraft/lang/vi.json
new file mode 100644
index 000000000..b4261b8cb
--- /dev/null
+++ b/src/main/resources/assets/computercraft/lang/vi.json
@@ -0,0 +1,48 @@
+{
+    "gui.computercraft.tooltip.disk_id": "ID của đĩa: %s",
+    "upgrade.computercraft.speaker.adjective": "Ồn ào",
+    "upgrade.computercraft.wireless_modem_advanced.adjective": "Ender",
+    "upgrade.computercraft.wireless_modem_normal.adjective": "Không dây",
+    "upgrade.minecraft.crafting_table.adjective": "Chế tạo",
+    "upgrade.minecraft.diamond_hoe.adjective": "Trồng trọt",
+    "upgrade.minecraft.diamond_axe.adjective": "Đốn",
+    "upgrade.minecraft.diamond_pickaxe.adjective": "Khai thác",
+    "upgrade.minecraft.diamond_shovel.adjective": "Đào",
+    "item.computercraft.pocket_computer_advanced.upgraded": "Máy tính bỏ túi tiên tiến %s",
+    "item.computercraft.pocket_computer_advanced": "Máy tính bỏ túi tiên tiến",
+    "item.computercraft.pocket_computer_normal.upgraded": "Máy tính bỏ túi %s",
+    "item.computercraft.pocket_computer_normal": "Máy tính bỏ túi",
+    "item.computercraft.printed_book": "Sách in",
+    "item.computercraft.printed_page": "Trang in",
+    "item.computercraft.treasure_disk": "Đĩa mềm",
+    "item.computercraft.disk": "Đĩa mềm",
+    "block.computercraft.turtle_advanced.upgraded_twice": "Rùa tiên tiến %s %s",
+    "block.computercraft.turtle_advanced.upgraded": "Rùa tiên tiến %s",
+    "block.computercraft.turtle_advanced": "Rùa tiên tiến",
+    "block.computercraft.turtle_normal.upgraded_twice": "Rùa %s %s",
+    "block.computercraft.turtle_normal.upgraded": "Rùa %s",
+    "block.computercraft.turtle_normal": "Rùa",
+    "block.computercraft.wired_modem_full": "Modem có dây",
+    "block.computercraft.cable": "Dây cáp mạng",
+    "block.computercraft.wired_modem": "Modem có dây",
+    "block.computercraft.wireless_modem_advanced": "Modem Ender",
+    "block.computercraft.wireless_modem_normal": "Modem không dây",
+    "block.computercraft.monitor_advanced": "Màn hình tiên tiếng",
+    "block.computercraft.monitor_normal": "Màn hình",
+    "block.computercraft.speaker": "Loa",
+    "block.computercraft.printer": "Máy in",
+    "block.computercraft.disk_drive": "Ỗ đĩa",
+    "block.computercraft.computer_command": "Máy tính điều khiển",
+    "block.computercraft.computer_normal": "Máy tính",
+    "itemGroup.computercraft": "ComputerCraft",
+    "block.computercraft.computer_advanced": "Máy tính tiên tiến",
+    "tracking_field.computercraft.websocket_incoming.name": "Websocket đến",
+    "tracking_field.computercraft.websocket_outgoing.name": "Websocket đi",
+    "gui.computercraft.tooltip.computer_id": "ID của máy tính: %s",
+    "tracking_field.computercraft.coroutines_dead.name": "Coroutine bỏ đi",
+    "tracking_field.computercraft.coroutines_created.name": "Coroutine đã tạo",
+    "tracking_field.computercraft.http_download.name": "HTTP tải xuống",
+    "tracking_field.computercraft.http_upload.name": "HTTP tải lên",
+    "tracking_field.computercraft.http.name": "Yêu cầu HTTP",
+    "gui.computercraft.tooltip.copy": "Sao chép vào clipboard"
+}
diff --git a/src/main/resources/assets/computercraft/shaders/monitor.frag b/src/main/resources/assets/computercraft/shaders/monitor.frag
index b0b7b49ed..f19a6a9eb 100644
--- a/src/main/resources/assets/computercraft/shaders/monitor.frag
+++ b/src/main/resources/assets/computercraft/shaders/monitor.frag
@@ -6,7 +6,7 @@
 uniform sampler2D u_font;
 uniform int u_width;
 uniform int u_height;
-uniform samplerBuffer u_tbo;
+uniform usamplerBuffer u_tbo;
 uniform vec3 u_palette[16];
 
 in vec2 f_pos;
@@ -30,9 +30,9 @@ void main() {
     vec2 outside = step(vec2(0.0, 0.0), vec2(cell)) * step(vec2(cell), vec2(float(u_width) - 1.0, float(u_height) - 1.0));
     float mult = outside.x * outside.y;
 
-    int character = int(texelFetch(u_tbo, index).r * 255.0);
-    int fg = int(texelFetch(u_tbo, index + 1).r * 255.0);
-    int bg = int(texelFetch(u_tbo, index + 2).r * 255.0);
+    int character = int(texelFetch(u_tbo, index).r);
+    int fg = int(texelFetch(u_tbo, index + 1).r);
+    int bg = int(texelFetch(u_tbo, index + 2).r);
 
     vec2 pos = (term_pos - corner) * vec2(FONT_WIDTH, FONT_HEIGHT);
     vec4 img = texture(u_font, (texture_corner(character) + pos) / 256.0);
diff --git a/src/main/resources/data/computercraft/lua/rom/apis/colors.lua b/src/main/resources/data/computercraft/lua/rom/apis/colors.lua
index a941fa287..1add04d6a 100644
--- a/src/main/resources/data/computercraft/lua/rom/apis/colors.lua
+++ b/src/main/resources/data/computercraft/lua/rom/apis/colors.lua
@@ -1,15 +1,137 @@
---- The Colors API allows you to manipulate sets of colors.
---
--- This is useful in conjunction with Bundled Cables from the RedPower mod,
--- RedNet Cables from the MineFactory Reloaded mod, and colors on Advanced
--- Computers and Advanced Monitors.
---
--- For the non-American English version just replace @{colors} with @{colours}
--- and it will use the other API, colours which is exactly the same, except in
--- British English (e.g. @{colors.gray} is spelt @{colours.grey}).
---
--- @see colours
--- @module colors
+--[[- The Colors API allows you to manipulate sets of colors.
+
+This is useful in conjunction with Bundled Cables from the RedPower mod, RedNet
+Cables from the MineFactory Reloaded mod, and colors on Advanced Computers and
+Advanced Monitors.
+
+For the non-American English version just replace @{colors} with @{colours} and
+it will use the other API, colours which is exactly the same, except in British
+English (e.g. @{colors.gray} is spelt @{colours.grey}).
+
+On basic terminals (such as the Computer and Monitor), all the colors are
+converted to grayscale. This means you can still use all 16 colors on the
+screen, but they will appear as the nearest tint of gray. You can check if a
+terminal supports color by using the function @{term.isColor}.
+
+Grayscale colors are calculated by taking the average of the three components,
+i.e. `(red + green + blue) / 3`.
+
+<table class="pretty-table">
+<thead>
+    <tr><th colspan="8" align="center">Default Colors</th></tr>
+    <tr>
+    <th rowspan="2" align="center">Color</th>
+    <th colspan="3" align="center">Value</th>
+    <th colspan="4" align="center">Default Palette Color</th>
+    </tr>
+    <tr>
+    <th>Dec</th><th>Hex</th><th>Paint/Blit</th>
+    <th>Preview</th><th>Hex</th><th>RGB</th><th>Grayscale</th>
+    </tr>
+</thead>
+<tbody>
+    <tr>
+    <td><code>colors.white</code></td>
+    <td align="right">1</td><td align="right">0x1</td><td align="right">0</td>
+    <td style="background:#F0F0F0"></td><td>#F0F0F0</td><td>240, 240, 240</td>
+    <td style="background:#F0F0F0"></td>
+    </tr>
+    <tr>
+    <td><code>colors.orange</code></td>
+    <td align="right">2</td><td align="right">0x2</td><td align="right">1</td>
+    <td style="background:#F2B233"></td><td>#F2B233</td><td>242, 178, 51</td>
+    <td style="background:#9D9D9D"></td>
+    </tr>
+    <tr>
+    <td><code>colors.magenta</code></td>
+    <td align="right">4</td><td align="right">0x4</td><td align="right">2</td>
+    <td style="background:#E57FD8"></td><td>#E57FD8</td><td>229, 127, 216</td>
+    <td style="background:#BEBEBE"></td>
+    </tr>
+    <tr>
+    <td><code>colors.lightBlue</code></td>
+    <td align="right">8</td><td align="right">0x8</td><td align="right">3</td>
+    <td style="background:#99B2F2"></td><td>#99B2F2</td><td>153, 178, 242</td>
+    <td style="background:#BFBFBF"></td>
+    </tr>
+    <tr>
+    <td><code>colors.yellow</code></td>
+    <td align="right">16</td><td align="right">0x10</td><td align="right">4</td>
+    <td style="background:#DEDE6C"></td><td>#DEDE6C</td><td>222, 222, 108</td>
+    <td style="background:#B8B8B8"></td>
+    </tr>
+    <tr>
+    <td><code>colors.lime</code></td>
+    <td align="right">32</td><td align="right">0x20</td><td align="right">5</td>
+    <td style="background:#7FCC19"></td><td>#7FCC19</td><td>127, 204, 25</td>
+    <td style="background:#767676"></td>
+    </tr>
+    <tr>
+    <td><code>colors.pink</code></td>
+    <td align="right">64</td><td align="right">0x40</td><td align="right">6</td>
+    <td style="background:#F2B2CC"></td><td>#F2B2CC</td><td>242, 178, 204</td>
+    <td style="background:#D0D0D0"></td>
+    </tr>
+    <tr>
+    <td><code>colors.gray</code></td>
+    <td align="right">128</td><td align="right">0x80</td><td align="right">7</td>
+    <td style="background:#4C4C4C"></td><td>#4C4C4C</td><td>76, 76, 76</td>
+    <td style="background:#4C4C4C"></td>
+    </tr>
+    <tr>
+    <td><code>colors.lightGray</code></td>
+    <td align="right">256</td><td align="right">0x100</td><td align="right">8</td>
+    <td style="background:#999999"></td><td>#999999</td><td>153, 153, 153</td>
+    <td style="background:#999999"></td>
+    </tr>
+    <tr>
+    <td><code>colors.cyan</code></td>
+    <td align="right">512</td><td align="right">0x200</td><td align="right">9</td>
+    <td style="background:#4C99B2"></td><td>#4C99B2</td><td>76, 153, 178</td>
+    <td style="background:#878787"></td>
+    </tr>
+    <tr>
+    <td><code>colors.purple</code></td>
+    <td align="right">1024</td><td align="right">0x400</td><td align="right">a</td>
+    <td style="background:#B266E5"></td><td>#B266E5</td><td>178, 102, 229</td>
+    <td style="background:#A9A9A9"></td>
+    </tr>
+    <tr>
+    <td><code>colors.blue</code></td>
+    <td align="right">2048</td><td align="right">0x800</td><td align="right">b</td>
+    <td style="background:#3366CC"></td><td>#3366CC</td><td>51, 102, 204</td>
+    <td style="background:#777777"></td>
+    </tr>
+    <tr>
+    <td><code>colors.brown</code></td>
+    <td align="right">4096</td><td align="right">0x1000</td><td align="right">c</td>
+    <td style="background:#7F664C"></td><td>#7F664C</td><td>127, 102, 76</td>
+    <td style="background:#656565"></td>
+    </tr>
+    <tr>
+    <td><code>colors.green</code></td>
+    <td align="right">8192</td><td align="right">0x2000</td><td align="right">d</td>
+    <td style="background:#57A64E"></td><td>#57A64E</td><td>87, 166, 78</td>
+    <td style="background:#6E6E6E"></td>
+    </tr>
+    <tr>
+    <td><code>colors.red</code></td>
+    <td align="right">16384</td><td align="right">0x4000</td><td align="right">e</td>
+    <td style="background:#CC4C4C"></td><td>#CC4C4C</td><td>204, 76, 76</td>
+    <td style="background:#767676"></td>
+    </tr>
+    <tr>
+    <td><code>colors.black</code></td>
+    <td align="right">32768</td><td align="right">0x8000</td><td align="right">f</td>
+    <td style="background:#111111"></td><td>#111111</td><td>17, 17, 17</td>
+    <td style="background:#111111"></td>
+    </tr>
+</tbody>
+</table>
+
+@see colours
+@module colors
+]]
 
 local expect = dofile("rom/modules/main/cc/expect.lua").expect
 
@@ -37,7 +159,7 @@ yellow = 0x10
 -- terminal colour of #7FCC19.
 lime = 0x20
 
---- Pink. Written as `6` in paint files and @{term.blit}, has a default
+--- Pink: Written as `6` in paint files and @{term.blit}, has a default
 -- terminal colour of #F2B2CC.
 pink = 0x40
 
@@ -74,10 +196,11 @@ green = 0x2000
 red = 0x4000
 
 --- Black: Written as `f` in paint files and @{term.blit}, has a default
--- terminal colour of #191919.
+-- terminal colour of #111111.
 black = 0x8000
 
---- Combines a set of colors (or sets of colors) into a larger set.
+--- Combines a set of colors (or sets of colors) into a larger set. Useful for
+-- Bundled Cables.
 --
 -- @tparam number ... The colors to combine.
 -- @treturn number The union of the color sets given in `...`
@@ -96,7 +219,8 @@ function combine(...)
     return r
 end
 
---- Removes one or more colors (or sets of colors) from an initial set.
+--- Removes one or more colors (or sets of colors) from an initial set. Useful
+-- for Bundled Cables.
 --
 -- Each parameter beyond the first may be a single color or may be a set of
 -- colors (in the latter case, all colors in the set are removed from the
@@ -121,7 +245,8 @@ function subtract(colors, ...)
     return r
 end
 
---- Tests whether `color` is contained within `colors`.
+--- Tests whether `color` is contained within `colors`. Useful for Bundled
+-- Cables.
 --
 -- @tparam number colors A color, or color set
 -- @tparam number color A color or set of colors that `colors` should contain.
@@ -145,7 +270,7 @@ end
 -- @treturn number The combined hexadecimal colour.
 -- @usage
 -- ```lua
--- colors.rgb(0.7, 0.2, 0.6)
+-- colors.unpackRGB(0.7, 0.2, 0.6)
 -- -- => 0xb23399
 -- ```
 function packRGB(r, g, b)
@@ -153,7 +278,7 @@ function packRGB(r, g, b)
     expect(2, g, "number")
     expect(3, b, "number")
     return
-        bit32.band(r * 255, 0xFF) * 2 ^ 16 +
+    bit32.band(r * 255, 0xFF) * 2 ^ 16 +
         bit32.band(g * 255, 0xFF) * 2 ^ 8 +
         bit32.band(b * 255, 0xFF)
 end
@@ -166,16 +291,16 @@ end
 -- @treturn number The blue channel, will be between 0 and 1.
 -- @usage
 -- ```lua
--- colors.rgb(0xb23399)
+-- colors.unpackRGB(0xb23399)
 -- -- => 0.7, 0.2, 0.6
 -- ```
 -- @see colors.packRGB
 function unpackRGB(rgb)
     expect(1, rgb, "number")
     return
-        bit32.band(bit32.rshift(rgb, 16), 0xFF) / 255,
-        bit32.band(bit32.rshift(rgb, 8), 0xFF) / 255,
-        bit32.band(rgb, 0xFF) / 255
+    bit32.band(bit32.rshift(rgb, 16), 0xFF) / 255,
+    bit32.band(bit32.rshift(rgb, 8), 0xFF) / 255,
+    bit32.band(rgb, 0xFF) / 255
 end
 
 --- Either calls @{colors.packRGB} or @{colors.unpackRGB}, depending on how many
@@ -192,12 +317,12 @@ end
 -- @deprecated Use @{packRGB} or @{unpackRGB} directly.
 -- @usage
 -- ```lua
--- colors.rgb(0xb23399)
+-- colors.unpackRGB(0xb23399)
 -- -- => 0.7, 0.2, 0.6
 -- ```
 -- @usage
 -- ```lua
--- colors.rgb(0.7, 0.2, 0.6)
+-- colors.unpackRGB(0.7, 0.2, 0.6)
 -- -- => 0xb23399
 -- ```
 function rgb8(r, g, b)
@@ -207,3 +332,21 @@ function rgb8(r, g, b)
         return packRGB(r, g, b)
     end
 end
+
+-- Colour to hex lookup table for toBlit
+local color_hex_lookup = {}
+for i = 0, 15 do
+    color_hex_lookup[2 ^ i] = string.format("%x", i)
+end
+
+--- Converts the given color to a paint/blit hex character (0-9a-f).
+--
+-- This is equivalent to converting floor(log_2(color)) to hexadecimal.
+--
+-- @tparam number color The color to convert.
+-- @treturn string The blit hex code of the color.
+function toBlit(color)
+    expect(1, color, "number")
+    return color_hex_lookup[color] or
+        string.format("%x", math.floor(math.log(color) / math.log(2)))
+end
diff --git a/src/main/resources/data/computercraft/lua/rom/apis/disk.lua b/src/main/resources/data/computercraft/lua/rom/apis/disk.lua
index 9e136b22c..ca5ac21d2 100644
--- a/src/main/resources/data/computercraft/lua/rom/apis/disk.lua
+++ b/src/main/resources/data/computercraft/lua/rom/apis/disk.lua
@@ -22,7 +22,7 @@ end
 --
 -- @tparam string name The name of the disk drive.
 -- @treturn boolean If something is in the disk drive.
--- @usage disk.isPresent(false)
+-- @usage disk.isPresent("top")
 function isPresent(name)
     if isDrive(name) then
         return peripheral.call(name, "isDiskPresent")
diff --git a/src/main/resources/data/computercraft/lua/rom/apis/help.lua b/src/main/resources/data/computercraft/lua/rom/apis/help.lua
index 438af474f..43b3d6b17 100644
--- a/src/main/resources/data/computercraft/lua/rom/apis/help.lua
+++ b/src/main/resources/data/computercraft/lua/rom/apis/help.lua
@@ -32,7 +32,7 @@ end
 -- @tparam string topic The topic to find
 -- @treturn string|nil The path to the given topic's help file, or `nil` if it
 -- cannot be found.
--- @usage print(help.lookup("disk"))
+-- @usage help.lookup("disk")
 function lookup(_sTopic)
     expect(1, _sTopic, "string")
     -- Look on the path variable
diff --git a/src/main/resources/data/computercraft/lua/rom/apis/io.lua b/src/main/resources/data/computercraft/lua/rom/apis/io.lua
index 917faef7f..5ecbdf652 100644
--- a/src/main/resources/data/computercraft/lua/rom/apis/io.lua
+++ b/src/main/resources/data/computercraft/lua/rom/apis/io.lua
@@ -289,7 +289,7 @@ end
 -- The `mode` string can be any of the following:
 --  - **"r"**: Read mode
 --  - **"w"**: Write mode
---  - **"w"**: Append mode
+--  - **"a"**: Append mode
 --
 -- The mode may also have a `b` at the end, which opens the file in "binary
 -- mode". This allows you to read binary files, as well as seek within a file.
diff --git a/src/main/resources/data/computercraft/lua/rom/apis/keys.lua b/src/main/resources/data/computercraft/lua/rom/apis/keys.lua
index 90f877aa5..206646c21 100644
--- a/src/main/resources/data/computercraft/lua/rom/apis/keys.lua
+++ b/src/main/resources/data/computercraft/lua/rom/apis/keys.lua
@@ -145,6 +145,7 @@ keys.cimcumflex = keys.circumflex --- @local
 --
 -- @tparam number code The key code to look up.
 -- @treturn string|nil The name of the key, or `nil` if not a valid key code.
+-- @usage keys.getName(keys.enter)
 function getName(_nKey)
     expect(1, _nKey, "number")
     return tKeys[_nKey]
diff --git a/src/main/resources/data/computercraft/lua/rom/apis/paintutils.lua b/src/main/resources/data/computercraft/lua/rom/apis/paintutils.lua
index 1af17ee6c..7ae1006b8 100644
--- a/src/main/resources/data/computercraft/lua/rom/apis/paintutils.lua
+++ b/src/main/resources/data/computercraft/lua/rom/apis/paintutils.lua
@@ -23,6 +23,25 @@ local function parseLine(tImageArg, sLine)
     table.insert(tImageArg, tLine)
 end
 
+-- Sorts pairs of startX/startY/endX/endY such that the start is always the min
+local function sortCoords(startX, startY, endX, endY)
+    local minX, maxX, minY, maxY
+
+    if startX <= endX then
+        minX, maxX = startX, endX
+    else
+        minX, maxX = endX, startX
+    end
+
+    if startY <= endY then
+        minY, maxY = startY, endY
+    else
+        minY, maxY = endY, startY
+    end
+
+    return minX, maxX, minY, maxY
+end
+
 --- Parses an image from a multi-line string
 --
 -- @tparam string image The string containing the raw-image data.
@@ -71,9 +90,6 @@ function drawPixel(xPos, yPos, colour)
     expect(2, yPos, "number")
     expect(3, colour, "number", "nil")
 
-    if type(xPos) ~= "number" then error("bad argument #1 (expected number, got " .. type(xPos) .. ")", 2) end
-    if type(yPos) ~= "number" then error("bad argument #2 (expected number, got " .. type(yPos) .. ")", 2) end
-    if colour ~= nil and type(colour) ~= "number" then error("bad argument #3 (expected number, got " .. type(colour) .. ")", 2) end
     if colour then
         term.setBackgroundColor(colour)
     end
@@ -111,17 +127,7 @@ function drawLine(startX, startY, endX, endY, colour)
         return
     end
 
-    local minX = math.min(startX, endX)
-    local maxX, minY, maxY
-    if minX == startX then
-        minY = startY
-        maxX = endX
-        maxY = endY
-    else
-        minY = endY
-        maxX = startX
-        maxY = startY
-    end
+    local minX, maxX, minY, maxY = sortCoords(startX, startY, endX, endY)
 
     -- TODO: clip to screen rectangle?
 
@@ -177,37 +183,33 @@ function drawBox(startX, startY, endX, endY, nColour)
     endY = math.floor(endY)
 
     if nColour then
-        term.setBackgroundColor(nColour)
+        term.setBackgroundColor(nColour) -- Maintain legacy behaviour
+    else
+        nColour = term.getBackgroundColour()
     end
+    local colourHex = colours.toBlit(nColour)
+
     if startX == endX and startY == endY then
         drawPixelInternal(startX, startY)
         return
     end
 
-    local minX = math.min(startX, endX)
-    local maxX, minY, maxY
-    if minX == startX then
-        minY = startY
-        maxX = endX
-        maxY = endY
-    else
-        minY = endY
-        maxX = startX
-        maxY = startY
-    end
+    local minX, maxX, minY, maxY = sortCoords(startX, startY, endX, endY)
+    local width = maxX - minX + 1
 
-    for x = minX, maxX do
-        drawPixelInternal(x, minY)
-        drawPixelInternal(x, maxY)
-    end
-
-    if maxY - minY >= 2 then
-        for y = minY + 1, maxY - 1 do
-            drawPixelInternal(minX, y)
-            drawPixelInternal(maxX, y)
+    for y = minY, maxY do
+        if y == minY or y == maxY then
+            term.setCursorPos(minX, y)
+            term.blit((" "):rep(width), colourHex:rep(width), colourHex:rep(width))
+        else
+            term.setCursorPos(minX, y)
+            term.blit(" ", colourHex, colourHex)
+            term.setCursorPos(maxX, y)
+            term.blit(" ", colourHex, colourHex)
         end
     end
 end
+
 --- Draws a filled box on the current term from the specified start position to
 -- the specified end position.
 --
@@ -233,29 +235,23 @@ function drawFilledBox(startX, startY, endX, endY, nColour)
     endY = math.floor(endY)
 
     if nColour then
-        term.setBackgroundColor(nColour)
+        term.setBackgroundColor(nColour) -- Maintain legacy behaviour
+    else
+        nColour = term.getBackgroundColour()
     end
+    local colourHex = colours.toBlit(nColour)
+
     if startX == endX and startY == endY then
         drawPixelInternal(startX, startY)
         return
     end
 
-    local minX = math.min(startX, endX)
-    local maxX, minY, maxY
-    if minX == startX then
-        minY = startY
-        maxX = endX
-        maxY = endY
-    else
-        minY = endY
-        maxX = startX
-        maxY = startY
-    end
+    local minX, maxX, minY, maxY = sortCoords(startX, startY, endX, endY)
+    local width = maxX - minX + 1
 
-    for x = minX, maxX do
-        for y = minY, maxY do
-            drawPixelInternal(x, y)
-        end
+    for y = minY, maxY do
+        term.setCursorPos(minX, y)
+        term.blit((" "):rep(width), colourHex:rep(width), colourHex:rep(width))
     end
 end
 
diff --git a/src/main/resources/data/computercraft/lua/rom/apis/peripheral.lua b/src/main/resources/data/computercraft/lua/rom/apis/peripheral.lua
index d8be09ad3..c284d0691 100644
--- a/src/main/resources/data/computercraft/lua/rom/apis/peripheral.lua
+++ b/src/main/resources/data/computercraft/lua/rom/apis/peripheral.lua
@@ -191,7 +191,7 @@ end
 -- filter function, which takes the peripheral's name and wrapped table
 -- and returns if it should be included in the result.
 -- @treturn table... 0 or more wrapped peripherals matching the given filters.
--- @usage local monitors = { peripheral.find("monitor") }
+-- @usage { peripheral.find("monitor") }
 -- @usage peripheral.find("modem", rednet.open)
 function find(ty, filter)
     expect(1, ty, "string")
diff --git a/src/main/resources/data/computercraft/lua/rom/apis/textutils.lua b/src/main/resources/data/computercraft/lua/rom/apis/textutils.lua
index 40de6924b..a55991fc9 100644
--- a/src/main/resources/data/computercraft/lua/rom/apis/textutils.lua
+++ b/src/main/resources/data/computercraft/lua/rom/apis/textutils.lua
@@ -9,7 +9,7 @@ local expect, field = expect.expect, expect.field
 --- Slowly writes string text at current cursor position,
 -- character-by-character.
 --
--- Like @{write}, this does not insert a newline at the end.
+-- Like @{_G.write}, this does not insert a newline at the end.
 --
 -- @tparam string sText The the text to write to the screen
 -- @tparam[opt] number nRate The number of characters to write each second,
@@ -119,8 +119,8 @@ end
 -- displayed before prompting.
 -- @treturn number The number of lines printed.
 -- @usage
--- local width, height = term.getSize()
--- textutils.pagedPrint(("This is a rather verbose dose of repetition.\n"):rep(30), height - 2)
+--     local width, height = term.getSize()
+--     textutils.pagedPrint(("This is a rather verbose dose of repetition.\n"):rep(30), height - 2)
 function pagedPrint(_sText, _nFreeLines)
     expect(2, _nFreeLines, "number", "nil")
     -- Setup a redirector
@@ -432,7 +432,7 @@ do
 
     --- Skip any whitespace
     local function skip(str, pos)
-        local _, last = find(str, "^[ \n\r\v]+", pos)
+        local _, last = find(str, "^[ \n\r\t]+", pos)
         if last then return last + 1 else return pos end
     end
 
@@ -453,13 +453,13 @@ do
         error_at(pos, "Unexpected %s, expected %s.", actual, exp)
     end
 
-    local function parse_string(str, pos)
+    local function parse_string(str, pos, terminate)
         local buf, n = {}, 1
 
         while true do
             local c = sub(str, pos, pos)
             if c == "" then error_at(pos, "Unexpected end of input, expected '\"'.") end
-            if c == '"' then break end
+            if c == terminate then break end
 
             if c == '\\' then
                 -- Handle the various escapes
@@ -472,7 +472,7 @@ do
                     buf[n], n, pos = utf8.char(tonumber(num_str, 16)), n + 1, pos + 6
                 else
                     local unesc = escapes[c]
-                    if not unesc then error_at(pos + 1, "Unknown escape character %q.", unesc) end
+                    if not unesc then error_at(pos + 1, "Unknown escape character %q.", c) end
                     buf[n], n, pos = unesc, n + 1, pos + 2
                 end
             elseif c >= '\x20' then
@@ -485,13 +485,13 @@ do
         return concat(buf, "", 1, n - 1), pos + 1
     end
 
-    local valid = { b = true, B = true, s = true, S = true, l = true, L = true, f = true, F = true, d = true, D = true }
+    local num_types = { b = true, B = true, s = true, S = true, l = true, L = true, f = true, F = true, d = true, D = true }
     local function parse_number(str, pos, opts)
         local _, last, num_str = find(str, '^(-?%d+%.?%d*[eE]?[+-]?%d*)', pos)
         local val = tonumber(num_str)
         if not val then error_at(pos, "Malformed number %q.", num_str) end
 
-        if opts.nbt_style and valid[sub(str, pos + 1, pos + 1)] then return val, last + 2 end
+        if opts.nbt_style and num_types[sub(str, last + 1, last + 1)] then return val, last + 2 end
 
         return val, last + 1
     end
@@ -501,9 +501,11 @@ do
         return val, last + 1
     end
 
+    local arr_types = { I = true, L = true, B = true }
     local function decode_impl(str, pos, opts)
         local c = sub(str, pos, pos)
-        if c == '"' then return parse_string(str, pos + 1)
+        if c == '"' then return parse_string(str, pos + 1, '"')
+        elseif c == "'" and opts.nbt_style then return parse_string(str, pos + 1, "\'")
         elseif c == "-" or c >= "0" and c <= "9" then return parse_number(str, pos, opts)
         elseif c == "t" then
             if sub(str, pos + 1, pos + 3) == "rue" then return true, pos + 4 end
@@ -528,7 +530,7 @@ do
 
             while true do
                 local key, value
-                if c == "\"" then key, pos = parse_string(str, pos + 1)
+                if c == "\"" then key, pos = parse_string(str, pos + 1, "\"")
                 elseif opts.nbt_style then key, pos = parse_ident(str, pos)
                 else return expected(pos, c, "object key")
                 end
@@ -560,6 +562,11 @@ do
             pos = skip(str, pos + 1)
             c = sub(str, pos, pos)
 
+            if arr_types[c] and sub(str, pos + 1, pos + 1) == ";" and opts.nbt_style then
+                pos = skip(str, pos + 2)
+                c = sub(str, pos, pos)
+            end
+
             if c == "" then return expected(pos, c, "']'") end
             if c == "]" then return empty_json_array, pos + 1 end
 
@@ -699,7 +706,7 @@ unserialiseJSON = unserialise_json
 --
 -- @tparam string str The string to encode
 -- @treturn string The encoded string.
--- @usage print("https://example.com/?view=" .. textutils.urlEncode(read()))
+-- @usage print("https://example.com/?view=" .. textutils.urlEncode("some text&things"))
 function urlEncode(str)
     expect(1, str, "string")
     if str then
@@ -712,7 +719,7 @@ function urlEncode(str)
             else
                 -- Non-ASCII (encode as UTF-8)
                 return
-                    string.format("%%%02X", 192 + bit32.band(bit32.arshift(n, 6), 31)) ..
+                string.format("%%%02X", 192 + bit32.band(bit32.arshift(n, 6), 31)) ..
                     string.format("%%%02X", 128 + bit32.band(n, 63))
             end
         end)
@@ -737,8 +744,8 @@ local tEmpty = {}
 --
 -- @treturn { string... } The (possibly empty) list of completions.
 -- @see shell.setCompletionFunction
--- @see read
--- @usage textutils.complete( "pa", getfenv() )
+-- @see _G.read
+-- @usage textutils.complete( "pa", _ENV )
 function complete(sSearchText, tSearchTable)
     expect(1, sSearchText, "string")
     expect(2, tSearchTable, "table", "nil")
diff --git a/src/main/resources/data/computercraft/lua/rom/apis/window.lua b/src/main/resources/data/computercraft/lua/rom/apis/window.lua
index d93533f03..684d54f9c 100644
--- a/src/main/resources/data/computercraft/lua/rom/apis/window.lua
+++ b/src/main/resources/data/computercraft/lua/rom/apis/window.lua
@@ -125,7 +125,7 @@ function create(parent, nX, nY, nWidth, nHeight, bStartVisible)
     -- Helper functions
     local function updateCursorPos()
         if nCursorX >= 1 and nCursorY >= 1 and
-           nCursorX <= nWidth and nCursorY <= nHeight then
+            nCursorX <= nWidth and nCursorY <= nHeight then
             parent.setCursorPos(nX + nCursorX - 1, nY + nCursorY - 1)
         else
             parent.setCursorPos(0, 0)
@@ -440,7 +440,7 @@ function create(parent, nX, nY, nWidth, nHeight, bStartVisible)
     end
 
     --- Get the buffered contents of a line in this window.
-    ---
+    --
     -- @tparam number y The y position of the line to get.
     -- @treturn string The textual content of this line.
     -- @treturn string The text colours of this line, suitable for use with @{term.blit}.
@@ -474,6 +474,14 @@ function create(parent, nX, nY, nWidth, nHeight, bStartVisible)
         end
     end
 
+    --- Get whether this window is visible. Invisible windows will not be
+    -- drawn to the screen until they are made visible again.
+    --
+    -- @treturn boolean Whether this window is visible.
+    -- @see Window:setVisible
+    function window.isVisible()
+        return bVisible
+    end
     --- Draw this window. This does nothing if the window is not visible.
     --
     -- @see Window:setVisible
diff --git a/src/main/resources/data/computercraft/lua/rom/modules/main/cc/completion.lua b/src/main/resources/data/computercraft/lua/rom/modules/main/cc/completion.lua
index 2ae2e4966..01cc187b1 100644
--- a/src/main/resources/data/computercraft/lua/rom/modules/main/cc/completion.lua
+++ b/src/main/resources/data/computercraft/lua/rom/modules/main/cc/completion.lua
@@ -1,5 +1,5 @@
 --- A collection of helper methods for working with input completion, such
--- as that require by @{read}.
+-- as that require by @{_G.read}.
 --
 -- @module cc.completion
 -- @see cc.shell.completion For additional helpers to use with
@@ -29,7 +29,7 @@ end
 -- @tparam { string... } choices The list of choices to complete from.
 -- @tparam[opt] boolean add_space Whether to add a space after the completed item.
 -- @treturn { string... } A list of suffixes of matching strings.
--- @usage Call @{read}, completing the names of various animals.
+-- @usage Call @{_G.read}, completing the names of various animals.
 --
 --     local animals = { "dog", "cat", "lion", "unicorn" }
 --     read(nil, nil, function(text) return choice(text, animals) end)
diff --git a/src/main/resources/data/computercraft/lua/rom/modules/main/cc/pretty.lua b/src/main/resources/data/computercraft/lua/rom/modules/main/cc/pretty.lua
index b934aa995..1c782ecee 100644
--- a/src/main/resources/data/computercraft/lua/rom/modules/main/cc/pretty.lua
+++ b/src/main/resources/data/computercraft/lua/rom/modules/main/cc/pretty.lua
@@ -13,11 +13,11 @@
 -- @module cc.pretty
 -- @usage Print a table to the terminal
 --     local pretty = require "cc.pretty"
---     pretty.write(pretty.dump({ 1, 2, 3 }))
+--     pretty.print(pretty.pretty({ 1, 2, 3 }))
 --
 -- @usage Build a custom document and display it
 --     local pretty = require "cc.pretty"
---     pretty.write(pretty.group(pretty.text("hello") .. pretty.space_line .. pretty.text("world")))
+--     pretty.print(pretty.group(pretty.text("hello") .. pretty.space_line .. pretty.text("world")))
 
 local expect = require "cc.expect"
 local expect, field = expect.expect, expect.field
diff --git a/src/main/resources/data/computercraft/lua/rom/modules/main/cc/shell/completion.lua b/src/main/resources/data/computercraft/lua/rom/modules/main/cc/shell/completion.lua
index 91d9ea7a4..21c10ec34 100644
--- a/src/main/resources/data/computercraft/lua/rom/modules/main/cc/shell/completion.lua
+++ b/src/main/resources/data/computercraft/lua/rom/modules/main/cc/shell/completion.lua
@@ -8,7 +8,7 @@
 -- wrap them using @{build}, or your own custom function.
 --
 -- @module cc.shell.completion
--- @see cc.completion For more general helpers, suitable for use with @{read}.
+-- @see cc.completion For more general helpers, suitable for use with @{_G.read}.
 -- @see shell.setCompletionFunction
 
 local expect = require "cc.expect".expect
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/alias.lua b/src/main/resources/data/computercraft/lua/rom/programs/alias.lua
index 79ebedc1f..c3471a723 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/alias.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/alias.lua
@@ -1,6 +1,7 @@
 local tArgs = { ... }
 if #tArgs > 2 then
-    print("Usage: alias <alias> <program>")
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
+    print("Usage: " .. programName .. " <alias> <program>")
     return
 end
 
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/cd.lua b/src/main/resources/data/computercraft/lua/rom/programs/cd.lua
index d1a3e86c1..f127ea88b 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/cd.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/cd.lua
@@ -1,6 +1,7 @@
 local tArgs = { ... }
 if #tArgs < 1 then
-    print("Usage: cd <path>")
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
+    print("Usage: " .. programName .. " <path>")
     return
 end
 
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/command/exec.lua b/src/main/resources/data/computercraft/lua/rom/programs/command/exec.lua
index 67c9446f9..1591b579d 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/command/exec.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/command/exec.lua
@@ -4,7 +4,8 @@ if not commands then
     return
 end
 if #tArgs == 0 then
-    printError("Usage: exec <command>")
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
+    printError("Usage: " .. programName .. " <command>")
     return
 end
 
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/copy.lua b/src/main/resources/data/computercraft/lua/rom/programs/copy.lua
index 49d58a0b9..0977d3f8f 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/copy.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/copy.lua
@@ -1,6 +1,7 @@
 local tArgs = { ... }
 if #tArgs < 2 then
-    print("Usage: cp <source> <destination>")
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
+    print("Usage: " .. programName .. " <source> <destination>")
     return
 end
 
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/delete.lua b/src/main/resources/data/computercraft/lua/rom/programs/delete.lua
index 620cdd629..1d071619c 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/delete.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/delete.lua
@@ -1,7 +1,8 @@
 local args = table.pack(...)
 
 if args.n < 1 then
-    print("Usage: rm <paths>")
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
+    print("Usage: " .. programName .. " <paths>")
     return
 end
 
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/edit.lua b/src/main/resources/data/computercraft/lua/rom/programs/edit.lua
index 007f37a24..8f0af9356 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/edit.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/edit.lua
@@ -1,7 +1,8 @@
 -- Get file to edit
 local tArgs = { ... }
 if #tArgs == 0 then
-    print("Usage: edit <path>")
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
+    print("Usage: " .. programName .. " <path>")
     return
 end
 
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/eject.lua b/src/main/resources/data/computercraft/lua/rom/programs/eject.lua
index b15e2f20f..3deb9c2a2 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/eject.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/eject.lua
@@ -1,7 +1,8 @@
 -- Get arguments
 local tArgs = { ... }
 if #tArgs == 0 then
-    print("Usage: eject <drive>")
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
+    print("Usage: " .. programName .. " <drive>")
     return
 end
 
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/fun/advanced/paint.lua b/src/main/resources/data/computercraft/lua/rom/programs/fun/advanced/paint.lua
index b7c44526a..cb9de4153 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/fun/advanced/paint.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/fun/advanced/paint.lua
@@ -34,7 +34,8 @@ end
 -- Determines if the file exists, and can be edited on this computer
 local tArgs = { ... }
 if #tArgs == 0 then
-    print("Usage: paint <path>")
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
+    print("Usage: " .. programName .. " <path>")
     return
 end
 local sPath = shell.resolve(tArgs[1])
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/fun/dj.lua b/src/main/resources/data/computercraft/lua/rom/programs/fun/dj.lua
index 322b4a887..48b4aa06c 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/fun/dj.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/fun/dj.lua
@@ -1,10 +1,11 @@
 local tArgs = { ... }
 
 local function printUsage()
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
     print("Usages:")
-    print("dj play")
-    print("dj play <drive>")
-    print("dj stop")
+    print(programName .. " play")
+    print(programName .. " play <drive>")
+    print(programName .. " stop")
 end
 
 if #tArgs > 2 then
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/gps.lua b/src/main/resources/data/computercraft/lua/rom/programs/gps.lua
index c0194443b..3e0590e9b 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/gps.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/gps.lua
@@ -1,8 +1,9 @@
 local function printUsage()
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
     print("Usages:")
-    print("gps host")
-    print("gps host <x> <y> <z>")
-    print("gps locate")
+    print(programName .. " host")
+    print(programName .. " host <x> <y> <z>")
+    print(programName .. " locate")
 end
 
 local tArgs = { ... }
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/http/pastebin.lua b/src/main/resources/data/computercraft/lua/rom/programs/http/pastebin.lua
index 15ad89f36..807ef603f 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/http/pastebin.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/http/pastebin.lua
@@ -1,8 +1,9 @@
 local function printUsage()
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
     print("Usages:")
-    print("pastebin put <filename>")
-    print("pastebin get <code> <filename>")
-    print("pastebin run <code> <arguments>")
+    print(programName .. " put <filename>")
+    print(programName .. " get <code> <filename>")
+    print(programName .. " run <code> <arguments>")
 end
 
 local tArgs = { ... }
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/http/wget.lua b/src/main/resources/data/computercraft/lua/rom/programs/http/wget.lua
index 7b5c7654e..ac5fc4fc0 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/http/wget.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/http/wget.lua
@@ -1,7 +1,8 @@
 local function printUsage()
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
     print("Usage:")
-    print("wget <url> [filename]")
-    print("wget run <url>")
+    print(programName .. " <url> [filename]")
+    print(programName .. " run <url>")
 end
 
 local tArgs = { ... }
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/label.lua b/src/main/resources/data/computercraft/lua/rom/programs/label.lua
index f857dac5c..8e413e09a 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/label.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/label.lua
@@ -1,13 +1,15 @@
 local function printUsage()
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
     print("Usages:")
-    print("label get")
-    print("label get <drive>")
-    print("label set <text>")
-    print("label set <drive> <text>")
-    print("label clear")
-    print("label clear <drive>")
+    print(programName .. " get")
+    print(programName .. " get <drive>")
+    print(programName .. " set <text>")
+    print(programName .. " set <drive> <text>")
+    print(programName .. " clear")
+    print(programName .. " clear <drive>")
 end
 
+
 local function checkDrive(sDrive)
     if peripheral.getType(sDrive) == "drive" then
         -- Check the disk exists
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/mkdir.lua b/src/main/resources/data/computercraft/lua/rom/programs/mkdir.lua
index bbdd08002..4e1b8ac10 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/mkdir.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/mkdir.lua
@@ -1,7 +1,8 @@
 local tArgs = { ... }
 
 if #tArgs < 1 then
-    print("Usage: mkdir <paths>")
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
+    print("Usage: " .. programName .. " <paths>")
     return
 end
 
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/monitor.lua b/src/main/resources/data/computercraft/lua/rom/programs/monitor.lua
index 01c9d7949..e97558357 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/monitor.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/monitor.lua
@@ -1,5 +1,6 @@
 local function printUsage()
-    print("Usage: monitor <name> <program> <arguments>")
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
+    print("Usage: " .. programName .. " <name> <program> <arguments>")
     return
 end
 
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/motd.lua b/src/main/resources/data/computercraft/lua/rom/programs/motd.lua
index c8c75a40b..57ab7b916 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/motd.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/motd.lua
@@ -1,15 +1,24 @@
-local tMotd = {}
+local date = os.date("*t")
+if date.month == 1 and date.day == 1 then
+    print("Happy new year!")
+elseif date.month == 12 and date.day == 24 then
+    print("Merry X-mas!")
+elseif date.month == 10 and date.day == 31 then
+    print("OOoooOOOoooo! Spooky!")
+else
+    local tMotd = {}
 
-for sPath in string.gmatch(settings.get("motd.path"), "[^:]+") do
-    if fs.exists(sPath) then
-        for sLine in io.lines(sPath) do
-            table.insert(tMotd, sLine)
+    for sPath in string.gmatch(settings.get("motd.path"), "[^:]+") do
+        if fs.exists(sPath) then
+            for sLine in io.lines(sPath) do
+                table.insert(tMotd, sLine)
+            end
         end
     end
-end
 
-if #tMotd == 0 then
-    print("missingno")
-else
-    print(tMotd[math.random(1, #tMotd)])
+    if #tMotd == 0 then
+        print("missingno")
+    else
+        print(tMotd[math.random(1, #tMotd)])
+    end
 end
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/move.lua b/src/main/resources/data/computercraft/lua/rom/programs/move.lua
index 254592200..3f68236d0 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/move.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/move.lua
@@ -1,6 +1,7 @@
 local tArgs = { ... }
 if #tArgs < 2 then
-    print("Usage: mv <source> <destination>")
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
+    print("Usage: " .. programName .. " <source> <destination>")
     return
 end
 
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/rednet/chat.lua b/src/main/resources/data/computercraft/lua/rom/programs/rednet/chat.lua
index 1bf5582b2..6585d0675 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/rednet/chat.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/rednet/chat.lua
@@ -1,9 +1,10 @@
 local tArgs = { ... }
 
 local function printUsage()
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
     print("Usages:")
-    print("chat host <hostname>")
-    print("chat join <hostname> <nickname>")
+    print(programName .. " host <hostname>")
+    print(programName .. " join <hostname> <nickname>")
 end
 
 local sOpenedModem = nil
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/redstone.lua b/src/main/resources/data/computercraft/lua/rom/programs/redstone.lua
index 65d6c5e1f..7c3165c1c 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/redstone.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/redstone.lua
@@ -1,11 +1,12 @@
 local tArgs = { ... }
 
 local function printUsage()
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
     print("Usages:")
-    print("redstone probe")
-    print("redstone set <side> <value>")
-    print("redstone set <side> <color> <value>")
-    print("redstone pulse <side> <count> <period>")
+    print(programName .. " probe")
+    print(programName .. " set <side> <value>")
+    print(programName .. " set <side> <color> <value>")
+    print(programName .. " pulse <side> <count> <period>")
 end
 
 local sCommand = tArgs[1]
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/rename.lua b/src/main/resources/data/computercraft/lua/rom/programs/rename.lua
index 8b491abcd..e627bb27f 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/rename.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/rename.lua
@@ -1,6 +1,7 @@
 local tArgs = { ... }
 if #tArgs < 2 then
-    print("Usage: rename <source> <destination>")
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
+    print("Usage: " .. programName .. " <source> <destination>")
     return
 end
 
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/shell.lua b/src/main/resources/data/computercraft/lua/rom/programs/shell.lua
index 0c6b5868b..1cc6dfe48 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/shell.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/shell.lua
@@ -383,7 +383,7 @@ end
 --
 -- @tparam string sLine The input to complete.
 -- @treturn { string }|nil The list of possible completions.
--- @see read For more information about completion.
+-- @see _G.read For more information about completion.
 -- @see shell.completeProgram
 -- @see shell.setCompletionFunction
 -- @see shell.getCompletionInfo
@@ -461,7 +461,7 @@ end
 -- The completion function.
 -- @see cc.shell.completion Various utilities to help with writing completion functions.
 -- @see shell.complete
--- @see read For more information about completion.
+-- @see _G.read For more information about completion.
 function shell.setCompletionFunction(program, complete)
     expect(1, program, "string")
     expect(2, complete, "function")
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/turtle/craft.lua b/src/main/resources/data/computercraft/lua/rom/programs/turtle/craft.lua
index 65f93104b..34da46aea 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/turtle/craft.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/turtle/craft.lua
@@ -1,5 +1,6 @@
 if not turtle then
-    printError("Requires a Turtle")
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
+    print("Usage: " .. programName .. " [number]")
     return
 end
 
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/turtle/equip.lua b/src/main/resources/data/computercraft/lua/rom/programs/turtle/equip.lua
index b69ef4c45..9f0d60735 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/turtle/equip.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/turtle/equip.lua
@@ -5,7 +5,8 @@ end
 
 local tArgs = { ... }
 local function printUsage()
-    print("Usage: equip <slot> <side>")
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
+    print("Usage: " .. programName .. " <slot> <side>")
 end
 
 if #tArgs ~= 2 then
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/turtle/excavate.lua b/src/main/resources/data/computercraft/lua/rom/programs/turtle/excavate.lua
index 9d4313eb1..1bb0488fe 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/turtle/excavate.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/turtle/excavate.lua
@@ -5,7 +5,8 @@ end
 
 local tArgs = { ... }
 if #tArgs ~= 1 then
-    print("Usage: excavate <diameter>")
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
+    print("Usage: " .. programName .. " <diameter>")
     return
 end
 
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/turtle/go.lua b/src/main/resources/data/computercraft/lua/rom/programs/turtle/go.lua
index 9c6de67ce..5b6c658e2 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/turtle/go.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/turtle/go.lua
@@ -5,7 +5,8 @@ end
 
 local tArgs = { ... }
 if #tArgs < 1 then
-    print("Usage: go <direction> <distance>")
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
+    print("Usage: " .. programName .. " <direction> <distance>")
     return
 end
 
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/turtle/refuel.lua b/src/main/resources/data/computercraft/lua/rom/programs/turtle/refuel.lua
index d9dd5b002..138cb9e47 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/turtle/refuel.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/turtle/refuel.lua
@@ -6,7 +6,8 @@ end
 local tArgs = { ... }
 local nLimit = 1
 if #tArgs > 1 then
-    print("Usage: refuel [number]")
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
+    print("Usage: " .. programName .. " [number]")
     return
 elseif #tArgs > 0 then
     if tArgs[1] == "all" then
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/turtle/tunnel.lua b/src/main/resources/data/computercraft/lua/rom/programs/turtle/tunnel.lua
index 34c0807d9..821965390 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/turtle/tunnel.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/turtle/tunnel.lua
@@ -5,7 +5,8 @@ end
 
 local tArgs = { ... }
 if #tArgs ~= 1 then
-    print("Usage: tunnel <length>")
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
+    print("Usage: " .. programName .. " <length>")
     return
 end
 
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/turtle/turn.lua b/src/main/resources/data/computercraft/lua/rom/programs/turtle/turn.lua
index e3fbbcbd3..c4d6ceeb7 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/turtle/turn.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/turtle/turn.lua
@@ -5,7 +5,8 @@ end
 
 local tArgs = { ... }
 if #tArgs < 1 then
-    print("Usage: turn <direction> <turns>")
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
+    print("Usage: " .. programName .. " <direction> <turns>")
     return
 end
 
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/turtle/unequip.lua b/src/main/resources/data/computercraft/lua/rom/programs/turtle/unequip.lua
index 97501aa42..82a37c895 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/turtle/unequip.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/turtle/unequip.lua
@@ -5,7 +5,8 @@ end
 
 local tArgs = { ... }
 local function printUsage()
-    print("Usage: unequip <side>")
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
+    print("Usage: " .. programName .. " <side>")
 end
 
 if #tArgs ~= 1 then
diff --git a/src/main/resources/data/computercraft/lua/rom/programs/type.lua b/src/main/resources/data/computercraft/lua/rom/programs/type.lua
index ccbaf0dd8..aa2ee54bb 100644
--- a/src/main/resources/data/computercraft/lua/rom/programs/type.lua
+++ b/src/main/resources/data/computercraft/lua/rom/programs/type.lua
@@ -1,6 +1,7 @@
 local tArgs = { ... }
 if #tArgs < 1 then
-    print("Usage: type <path>")
+    local programName = arg[0] or fs.getName(shell.getRunningProgram())
+    print("Usage: " .. programName .. " <path>")
     return
 end
 
diff --git a/src/test/java/dan200/computercraft/core/apis/options/AddressRuleTest.java b/src/test/java/dan200/computercraft/core/apis/options/AddressRuleTest.java
new file mode 100644
index 000000000..690cb37f5
--- /dev/null
+++ b/src/test/java/dan200/computercraft/core/apis/options/AddressRuleTest.java
@@ -0,0 +1,34 @@
+/*
+ * This file is part of ComputerCraft - http://www.computercraft.info
+ * Copyright Daniel Ratcliffe, 2011-2020. Do not distribute without permission.
+ * Send enquiries to dratcliffe@gmail.com
+ */
+
+package dan200.computercraft.core.apis.http.options;
+
+import org.junit.jupiter.api.Test;
+
+import java.net.InetSocketAddress;
+import java.util.Collections;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class AddressRuleTest
+{
+    @Test
+    public void matchesPort()
+    {
+        Iterable<AddressRule> rules = Collections.singletonList( AddressRule.parse(
+            "127.0.0.1", 8080,
+            new PartialOptions( Action.ALLOW, null, null, null, null )
+        ) );
+
+        assertEquals( apply( rules, "localhost", 8080 ).action, Action.ALLOW );
+        assertEquals( apply( rules, "localhost", 8081 ).action, Action.DENY );
+    }
+
+    private Options apply( Iterable<AddressRule> rules, String host, int port )
+    {
+        return AddressRule.apply( rules, host, new InetSocketAddress( host, port ) );
+    }
+}
diff --git a/src/test/resources/test-rom/spec/apis/colors_spec.lua b/src/test/resources/test-rom/spec/apis/colors_spec.lua
index 86b8adfe9..c7505ca5a 100644
--- a/src/test/resources/test-rom/spec/apis/colors_spec.lua
+++ b/src/test/resources/test-rom/spec/apis/colors_spec.lua
@@ -73,4 +73,20 @@ describe("The colors library", function()
         expect(colors.rgb8(0.3, 0.5, 0.6)):equals(0x4c7f99)
         expect({ colors.rgb8(0x4c7f99) }):same { 0x4c / 0xFF, 0x7f / 0xFF, 0.6 }
     end)
+
+    describe("colors.toBlit", function()
+        it("validates arguments", function()
+            expect.error(colors.toBlit, nil):eq("bad argument #1 (expected number, got nil)")
+        end)
+
+        it("converts all colors", function()
+            for i = 0, 15 do
+                expect(colors.toBlit(2 ^ i)):eq(string.format("%x", i))
+            end
+        end)
+
+        it("floors colors", function()
+            expect(colors.toBlit(16385)):eq("e")
+        end)
+    end)
 end)
diff --git a/src/test/resources/test-rom/spec/apis/paintutils_spec.lua b/src/test/resources/test-rom/spec/apis/paintutils_spec.lua
index fc72eece2..fc2b6008c 100644
--- a/src/test/resources/test-rom/spec/apis/paintutils_spec.lua
+++ b/src/test/resources/test-rom/spec/apis/paintutils_spec.lua
@@ -1,4 +1,19 @@
+local with_window = require "test_helpers".with_window
+
 describe("The paintutils library", function()
+    -- Verifies that a window's lines are equal to the given table of blit
+    -- strings ({{"text", "fg", "bg"}, {"text", "fg", "bg"}...})
+    local function window_eq(w, state)
+        -- Verification of the size isn't really important in the tests, but
+        -- better safe than sorry.
+        local _, height = w.getSize()
+        expect(#state):eq(height)
+
+        for line = 1, height do
+            expect({ w.getLine(line) }):same(state[line])
+        end
+    end
+
     describe("paintutils.parseImage", function()
         it("validates arguments", function()
             paintutils.parseImage("")
@@ -28,6 +43,30 @@ describe("The paintutils library", function()
             expect.error(paintutils.drawLine, 1, 1, 1, nil):eq("bad argument #4 (expected number, got nil)")
             expect.error(paintutils.drawLine, 1, 1, 1, 1, false):eq("bad argument #5 (expected number, got boolean)")
         end)
+
+        it("draws a line going across with custom colour", function()
+            local w = with_window(3, 2, function()
+                paintutils.drawLine(1, 1, 3, 1, colours.red)
+            end)
+
+            window_eq(w, {
+                { "   ", "000", "eee" },
+                { "   ", "000", "fff" },
+            })
+        end)
+
+        it("draws a line going diagonally with term colour", function()
+            local w = with_window(3, 3, function()
+                term.setBackgroundColour(colours.red)
+                paintutils.drawLine(1, 1, 3, 3)
+            end)
+
+            window_eq(w, {
+                { "   ", "000", "eff" },
+                { "   ", "000", "fef" },
+                { "   ", "000", "ffe" },
+            })
+        end)
     end)
 
     describe("paintutils.drawBox", function()
@@ -38,6 +77,45 @@ describe("The paintutils library", function()
             expect.error(paintutils.drawBox, 1, 1, 1, nil):eq("bad argument #4 (expected number, got nil)")
             expect.error(paintutils.drawBox, 1, 1, 1, 1, false):eq("bad argument #5 (expected number, got boolean)")
         end)
+
+        it("draws a box with term colour", function()
+            local w = with_window(3, 3, function()
+                term.setBackgroundColour(colours.red)
+                paintutils.drawBox(1, 1, 3, 3)
+            end)
+
+            window_eq(w, {
+                { "   ", "eee", "eee" },
+                { "   ", "e0e", "efe" },
+                { "   ", "eee", "eee" },
+            })
+        end)
+
+        it("draws a box with custom colour", function()
+            local w = with_window(3, 3, function()
+                paintutils.drawBox(1, 1, 3, 3, colours.red)
+            end)
+
+            window_eq(w, {
+                { "   ", "eee", "eee" },
+                { "   ", "e0e", "efe" },
+                { "   ", "eee", "eee" },
+            })
+        end)
+
+        it("draws a box without overwriting existing content", function()
+            local w = with_window(3, 3, function()
+                term.setCursorPos(2, 2)
+                term.write("a")
+                paintutils.drawBox(1, 1, 3, 3, colours.red)
+            end)
+
+            window_eq(w, {
+                { "   ", "eee", "eee" },
+                { " a ", "e0e", "efe" },
+                { "   ", "eee", "eee" },
+            })
+        end)
     end)
 
     describe("paintutils.drawFilledBox", function()
@@ -48,6 +126,31 @@ describe("The paintutils library", function()
             expect.error(paintutils.drawFilledBox, 1, 1, 1, nil):eq("bad argument #4 (expected number, got nil)")
             expect.error(paintutils.drawFilledBox, 1, 1, 1, 1, false):eq("bad argument #5 (expected number, got boolean)")
         end)
+
+        it("draws a filled box with term colour", function()
+            local w = with_window(3, 3, function()
+                term.setBackgroundColour(colours.red)
+                paintutils.drawFilledBox(1, 1, 3, 3)
+            end)
+
+            window_eq(w, {
+                { "   ", "eee", "eee" },
+                { "   ", "eee", "eee" },
+                { "   ", "eee", "eee" },
+            })
+        end)
+
+        it("draws a filled box with custom colour", function()
+            local w = with_window(3, 3, function()
+                paintutils.drawFilledBox(1, 1, 3, 3, colours.red)
+            end)
+
+            window_eq(w, {
+                { "   ", "eee", "eee" },
+                { "   ", "eee", "eee" },
+                { "   ", "eee", "eee" },
+            })
+        end)
     end)
 
     describe("paintutils.drawImage", function()
diff --git a/src/test/resources/test-rom/spec/apis/window_spec.lua b/src/test/resources/test-rom/spec/apis/window_spec.lua
index 16fe229e1..d1861eef2 100644
--- a/src/test/resources/test-rom/spec/apis/window_spec.lua
+++ b/src/test/resources/test-rom/spec/apis/window_spec.lua
@@ -118,6 +118,56 @@ describe("The window library", function()
             expect.error(w.reposition, 1, 1, false, 1):eq("bad argument #3 (expected number, got boolean)")
             expect.error(w.reposition, 1, 1, nil, 1):eq("bad argument #3 (expected number, got nil)")
             expect.error(w.reposition, 1, 1, 1, nil):eq("bad argument #4 (expected number, got nil)")
+            expect.error(w.reposition, 1, 1, 1, 1, true):eq("bad argument #5 (expected table, got boolean)")
+        end)
+
+        it("can change the buffer", function()
+            local a, b = mk(), mk()
+            local target = window.create(a, 1, 1, a.getSize())
+
+            target.write("Test")
+            expect((a.getLine(1))):equal("Test ")
+            expect({ a.getCursorPos() }):same { 5, 1 }
+
+            target.reposition(1, 1, nil, nil, b)
+
+            target.redraw()
+            expect((a.getLine(1))):equal("Test ")
+            expect({ a.getCursorPos() }):same { 5, 1 }
+
+            target.setCursorPos(1, 1) target.write("More")
+            expect((a.getLine(1))):equal("Test ")
+            expect((b.getLine(1))):equal("More ")
+        end)
+    end)
+
+    describe("Window.getLine", function()
+        it("validates arguments", function()
+            local w = mk()
+            w.getLine(1)
+            local _, y = w.getSize()
+            expect.error(w.getLine, nil):eq("bad argument #1 (expected number, got nil)")
+            expect.error(w.getLine, 0):eq("Line is out of range.")
+            expect.error(w.getLine, y + 1):eq("Line is out of range.")
+        end)
+
+        it("provides a line's contents", function()
+            local w = mk()
+            w.blit("test", "aaaa", "4444")
+            expect({ w.getLine(1) }):same { "test ", "aaaa0", "4444f" }
+        end)
+    end)
+    describe("Window.setVisible", function()
+        it("validates arguments", function()
+            local w = mk()
+            expect.error(w.setVisible, nil):eq("bad argument #1 (expected boolean, got nil)")
+        end)
+    end)
+    describe("Window.isVisible", function()
+        it("gets window visibility", function()
+            local w = mk()
+            w.setVisible(false)
+            expect(w.isVisible()):same(false)
         end)
     end)
 end)
diff --git a/src/test/resources/test-rom/spec/programs/command/exec_spec.lua b/src/test/resources/test-rom/spec/programs/command/exec_spec.lua
new file mode 100644
index 000000000..4e6b37b2c
--- /dev/null
+++ b/src/test/resources/test-rom/spec/programs/command/exec_spec.lua
@@ -0,0 +1,33 @@
+local capture = require "test_helpers".capture_program
+
+describe("The exec program", function()
+    it("displays an error without the commands api", function()
+        stub(_G, "commands", nil)
+        expect(capture(stub, "/rom/programs/command/exec.lua"))
+        :matches { ok = true, output = "", error = "Requires a Command Computer.\n" }
+    end)
+
+    it("displays its usage when given no argument", function()
+        stub(_G, "commands", {})
+        expect(capture(stub, "/rom/programs/command/exec.lua"))
+        :matches { ok = true, output = "", error = "Usage: /rom/programs/command/exec.lua <command>\n" }
+    end)
+
+    it("runs a command", function()
+        stub(_G, "commands", {
+            exec = function() return true, { "Hello World!" } end,
+        })
+
+        expect(capture(stub, "/rom/programs/command/exec.lua computercraft"))
+        :matches { ok = true, output = "Success\nHello World!\n", error = "" }
+    end)
+
+    it("reports command failures", function()
+        stub(_G, "commands", {
+            exec = function() return false, { "Hello World!" } end,
+        })
+
+        expect(capture(stub, "/rom/programs/command/exec.lua computercraft"))
+        :matches { ok = true, output = "Hello World!\n", error = "Failed\n" }
+    end)
+end)
diff --git a/src/test/resources/test-rom/spec/programs/copy_spec.lua b/src/test/resources/test-rom/spec/programs/copy_spec.lua
new file mode 100644
index 000000000..c18dd54c6
--- /dev/null
+++ b/src/test/resources/test-rom/spec/programs/copy_spec.lua
@@ -0,0 +1,40 @@
+local capture = require "test_helpers".capture_program
+
+describe("The copy program", function()
+    local function touch(file)
+        io.open(file, "w"):close()
+    end
+
+    it("copies a file", function()
+        touch("/test-files/copy/a.txt")
+
+        shell.run("copy /test-files/copy/a.txt /test-files/copy/b.txt")
+
+        expect(fs.exists("/test-files/copy/a.txt")):eq(true)
+        expect(fs.exists("/test-files/copy/b.txt")):eq(true)
+    end)
+
+    it("fails when copying a non-existent file", function()
+        expect(capture(stub, "copy nothing destination"))
+        :matches { ok = true, output = "", error = "No matching files\n" }
+    end)
+
+    it("fails when overwriting an existing file", function()
+        touch("/test-files/copy/c.txt")
+
+        expect(capture(stub, "copy /test-files/copy/c.txt /test-files/copy/c.txt"))
+        :matches { ok = true, output = "", error = "Destination exists\n" }
+    end)
+
+    it("fails when copying into read-only locations", function()
+        touch("/test-files/copy/d.txt")
+
+        expect(capture(stub, "copy /test-files/copy/d.txt /rom/test.txt"))
+        :matches { ok = true, output = "", error = "Destination is read-only\n" }
+    end)
+
+    it("displays the usage when given no arguments", function()
+        expect(capture(stub, "copy"))
+        :matches { ok = true, output = "Usage: copy <source> <destination>\n", error = "" }
+    end)
+end)
diff --git a/src/test/resources/test-rom/spec/programs/motd_spec.lua b/src/test/resources/test-rom/spec/programs/motd_spec.lua
new file mode 100644
index 000000000..d426fb6e7
--- /dev/null
+++ b/src/test/resources/test-rom/spec/programs/motd_spec.lua
@@ -0,0 +1,36 @@
+local capture = require "test_helpers".capture_program
+
+describe("The motd program", function()
+    local function setup_date(month, day)
+        stub(os, "date", function() return { month = month, day = day } end)
+    end
+
+    it("displays MOTD", function()
+        setup_date(0, 0)
+        local file = fs.open("/motd_check.txt", "w")
+        file.write("Hello World!")
+        file.close()
+        settings.set("motd.path", "/motd_check.txt")
+
+        expect(capture(stub, "motd"))
+            :matches { ok = true, output = "Hello World!\n", error = "" }
+    end)
+
+    it("displays date-specific MOTD (1/1)", function()
+        setup_date(1, 1)
+        expect(capture(stub, "motd"))
+            :matches { ok = true, output = "Happy new year!\n", error = "" }
+    end)
+
+    it("displays date-specific MOTD (10/31)", function()
+        setup_date(10, 31)
+        expect(capture(stub, "motd"))
+            :matches { ok = true, output = "OOoooOOOoooo! Spooky!\n", error = "" }
+    end)
+
+    it("displays date-specific MOTD (12/24)", function()
+        setup_date(12, 24)
+        expect(capture(stub, "motd"))
+            :matches { ok = true, output = "Merry X-mas!\n", error = "" }
+    end)
+end)
diff --git a/src/test/resources/test-rom/spec/programs/move_spec.lua b/src/test/resources/test-rom/spec/programs/move_spec.lua
new file mode 100644
index 000000000..7fa8a3857
--- /dev/null
+++ b/src/test/resources/test-rom/spec/programs/move_spec.lua
@@ -0,0 +1,74 @@
+local capture = require "test_helpers".capture_program
+
+describe("The move program", function()
+    local function cleanup() fs.delete("/test-files/move") end
+    local function touch(file)
+        io.open(file, "w"):close()
+    end
+
+    it("move a file", function()
+        cleanup()
+        touch("/test-files/move/a.txt")
+
+        shell.run("move /test-files/move/a.txt /test-files/move/b.txt")
+
+        expect(fs.exists("/test-files/move/a.txt")):eq(false)
+        expect(fs.exists("/test-files/move/b.txt")):eq(true)
+    end)
+
+    it("moves a file to a directory", function()
+        cleanup()
+        touch("/test-files/move/a.txt")
+        fs.makeDir("/test-files/move/a")
+
+        expect(capture(stub, "move /test-files/move/a.txt /test-files/move/a"))
+        :matches { ok = true }
+
+        expect(fs.exists("/test-files/move/a.txt")):eq(false)
+        expect(fs.exists("/test-files/move/a/a.txt")):eq(true)
+    end)
+
+    it("fails when moving a file which doesn't exist", function()
+        expect(capture(stub, "move nothing destination"))
+        :matches { ok = true, output = "", error = "No matching files\n" }
+    end)
+
+    it("fails when overwriting an existing file", function()
+        cleanup()
+        touch("/test-files/move/a.txt")
+
+        expect(capture(stub, "move /test-files/move/a.txt /test-files/move/a.txt"))
+        :matches { ok = true, output = "", error = "Destination exists\n" }
+    end)
+
+    it("fails when moving to read-only locations", function()
+        cleanup()
+        touch("/test-files/move/a.txt")
+
+        expect(capture(stub, "move /test-files/move/a.txt /rom/test.txt"))
+        :matches { ok = true, output = "", error = "Destination is read-only\n" }
+    end)
+
+    it("fails when moving from read-only locations", function()
+        expect(capture(stub, "move /rom/startup.lua /test-files/move/not-exist.txt"))
+        :matches { ok = true, output = "", error = "Cannot move read-only file /rom/startup.lua\n" }
+    end)
+
+    it("fails when moving mounts", function()
+        expect(capture(stub, "move /rom /test-files/move/rom"))
+        :matches { ok = true, output = "", error = "Cannot move mount /rom\n" }
+    end)
+
+    it("fails when moving a file multiple times", function()
+        cleanup()
+        touch("/test-files/move/a.txt")
+        touch("/test-files/move/b.txt")
+        expect(capture(stub, "move /test-files/move/*.txt /test-files/move/c.txt"))
+        :matches { ok = true, output = "", error = "Cannot overwrite file multiple times\n" }
+    end)
+
+    it("displays the usage with no arguments", function()
+        expect(capture(stub, "move"))
+        :matches { ok = true, output = "Usage: move <source> <destination>\n", error = "" }
+    end)
+end)
diff --git a/src/test/resources/test-rom/spec/programs/turtle/craft_spec.lua b/src/test/resources/test-rom/spec/programs/turtle/craft_spec.lua
new file mode 100644
index 000000000..95b953b38
--- /dev/null
+++ b/src/test/resources/test-rom/spec/programs/turtle/craft_spec.lua
@@ -0,0 +1,69 @@
+local capture = require "test_helpers".capture_program
+
+describe("The craft program", function()
+    it("errors when not a turtle", function()
+        stub(_G, "turtle", nil)
+
+        expect(capture(stub, "/rom/programs/turtle/craft.lua"))
+        :matches { ok = true, output = "", error = "Requires a Turtle\n" }
+    end)
+
+    it("fails when turtle.craft() is unavailable", function()
+        stub(_G, "turtle", {})
+
+        expect(capture(stub, "/rom/programs/turtle/craft.lua"))
+        :matches { ok = true, output = "Requires a Crafty Turtle\n", error = "" }
+    end)
+
+    it("displays its usage when given no arguments", function()
+        stub(_G, "turtle", { craft = function() end })
+
+        expect(capture(stub, "/rom/programs/turtle/craft.lua"))
+        :matches { ok = true, output = "Usage: /rom/programs/turtle/craft.lua [number]\n", error = "" }
+    end)
+
+    it("crafts multiple items", function()
+        local item_count = 3
+        stub(_G, "turtle", {
+            craft = function()
+                item_count = 1
+                return true
+            end,
+            getItemCount = function() return item_count end,
+            getSelectedSlot = function() return 1 end,
+        })
+
+        expect(capture(stub, "/rom/programs/turtle/craft.lua 2"))
+        :matches { ok = true, output = "2 items crafted\n", error = "" }
+    end)
+
+    it("craft a single item", function()
+        local item_count = 2
+        stub(_G, "turtle", {
+            craft = function()
+                item_count = 1
+                return true
+            end,
+            getItemCount = function() return item_count end,
+            getSelectedSlot = function() return 1 end,
+        })
+
+        expect(capture(stub, "/rom/programs/turtle/craft.lua 1"))
+        :matches { ok = true, output = "1 item crafted\n", error = "" }
+    end)
+
+    it("crafts no items", function()
+        local item_count = 2
+        stub(_G, "turtle", {
+            craft = function()
+                item_count = 1
+                return false
+            end,
+            getItemCount = function() return item_count end,
+            getSelectedSlot = function() return 1 end,
+        })
+
+        expect(capture(stub, "/rom/programs/turtle/craft.lua 1"))
+        :matches { ok = true, output = "No items crafted\n", error = "" }
+    end)
+end)
diff --git a/src/test/resources/test-rom/spec/programs/turtle/equip_spec.lua b/src/test/resources/test-rom/spec/programs/turtle/equip_spec.lua
new file mode 100644
index 000000000..cc12aa367
--- /dev/null
+++ b/src/test/resources/test-rom/spec/programs/turtle/equip_spec.lua
@@ -0,0 +1,89 @@
+local capture = require "test_helpers".capture_program
+
+describe("The turtle equip program", function()
+    it("errors when not a turtle", function()
+        stub(_G, "turtle", nil)
+
+        expect(capture(stub, "/rom/programs/turtle/equip.lua"))
+        :matches { ok = true, output = "", error = "Requires a Turtle\n" }
+    end)
+
+
+    it("displays its usage when given no arguments", function()
+        stub(_G, "turtle", {})
+
+        expect(capture(stub, "/rom/programs/turtle/equip.lua"))
+        :matches { ok = true, output = "Usage: /rom/programs/turtle/equip.lua <slot> <side>\n", error = "" }
+    end)
+
+    it("equip nothing", function()
+        stub(_G, "turtle", {
+            select = function() end,
+            getItemCount = function() return 0 end,
+        })
+
+        expect(capture(stub, "/rom/programs/turtle/equip.lua 1 left"))
+        :matches { ok = true, output = "Nothing to equip\n", error = "" }
+        expect(capture(stub, "/rom/programs/turtle/equip.lua 1 right"))
+        :matches { ok = true, output = "Nothing to equip\n", error = "" }
+    end)
+
+    it("swaps existing upgrades", function()
+        stub(_G, "turtle", {
+            select = function() end,
+            getItemCount = function() return 1 end,
+            equipLeft = function() return true end,
+            equipRight = function() return true end,
+        })
+
+        expect(capture(stub, "/rom/programs/turtle/equip.lua 1 left"))
+        :matches { ok = true, output = "Items swapped\n", error = "" }
+        expect(capture(stub, "/rom/programs/turtle/equip.lua 1 right"))
+        :matches { ok = true, output = "Items swapped\n", error = "" }
+    end)
+
+    describe("equips a new upgrade", function()
+        local function setup()
+            local item_count = 1
+            stub(_G, "turtle", {
+                select = function() end,
+                getItemCount = function() return item_count end,
+                equipLeft = function()
+                    item_count  = 0
+                    return true
+                end,
+                equipRight = function()
+                    item_count = 0
+                    return true
+                end,
+            })
+        end
+
+        it("on the left", function()
+            setup()
+            expect(capture(stub, "/rom/programs/turtle/equip.lua 1 left"))
+            :matches { ok = true, output = "Item equipped\n", error = "" }
+        end)
+
+        it("on the right", function()
+            setup()
+            expect(capture(stub, "/rom/programs/turtle/equip.lua 1 right"))
+            :matches { ok = true, output = "Item equipped\n", error = "" }
+        end)
+    end)
+
+    it("handles when an upgrade cannot be equipped", function()
+        stub(_G, "turtle", {
+            select = function() end,
+            getItemCount = function() return 1 end,
+            equipLeft = function() return false end,
+            equipRight = function() return false end,
+        })
+
+        expect(capture(stub, "/rom/programs/turtle/equip.lua 1 left"))
+        :matches { ok = true, output = "Item not equippable\n", error = "" }
+        expect(capture(stub, "/rom/programs/turtle/equip.lua 1 right"))
+        :matches { ok = true, output = "Item not equippable\n", error = "" }
+    end)
+
+end)
diff --git a/src/test/resources/test-rom/spec/programs/turtle/refuel_spec.lua b/src/test/resources/test-rom/spec/programs/turtle/refuel_spec.lua
new file mode 100644
index 000000000..5ba397b72
--- /dev/null
+++ b/src/test/resources/test-rom/spec/programs/turtle/refuel_spec.lua
@@ -0,0 +1,62 @@
+local capture = require "test_helpers".capture_program
+
+describe("The refuel program", function()
+    local function setup_turtle(fuel_level, fuel_limit, item_count)
+        stub(_G, "turtle", {
+            getFuelLevel = function()
+                return fuel_level
+            end,
+            getItemCount = function()
+                return item_count
+            end,
+            refuel = function(nLimit)
+                item_count = item_count - nLimit
+                fuel_level = fuel_level + nLimit
+            end,
+            select = function()
+            end,
+            getFuelLimit = function()
+                return fuel_limit
+            end,
+        })
+    end
+
+    it("errors when not a turtle", function()
+        stub(_G, "turtle", nil)
+
+        expect(capture(stub, "/rom/programs/turtle/refuel.lua"))
+        :matches { ok = true, output = "", error = "Requires a Turtle\n" }
+    end)
+
+
+    it("displays its usage when given too many argument", function()
+        setup_turtle(0, 5, 0)
+        expect(capture(stub, "/rom/programs/turtle/refuel.lua a b"))
+        :matches { ok = true, output = "Usage: /rom/programs/turtle/refuel.lua [number]\n", error = "" }
+    end)
+
+    it("requires a numeric argument", function()
+        setup_turtle(0, 0, 0)
+        expect(capture(stub, "/rom/programs/turtle/refuel.lua nothing"))
+        :matches { ok = true, output = "Invalid limit, expected a number or \"all\"\n", error = "" }
+    end)
+
+    it("refuels the turtle", function()
+        setup_turtle(0, 10, 5)
+
+        expect(capture(stub, "/rom/programs/turtle/refuel.lua 5"))
+        :matches { ok = true, output = "Fuel level is 5\n", error = "" }
+    end)
+
+    it("reports when the fuel limit is reached", function()
+        setup_turtle(0, 5, 5)
+        expect(capture(stub, "/rom/programs/turtle/refuel.lua 5"))
+        :matches { ok = true, output = "Fuel level is 5\nFuel limit reached\n", error = "" }
+    end)
+
+    it("reports when the fuel level is unlimited", function()
+        setup_turtle("unlimited", 5, 5)
+        expect(capture(stub, "/rom/programs/turtle/refuel.lua 5"))
+        :matches { ok = true, output = "Fuel level is unlimited\n", error = "" }
+    end)
+end)
diff --git a/src/test/resources/test-rom/spec/programs/turtle/unequip_spec.lua b/src/test/resources/test-rom/spec/programs/turtle/unequip_spec.lua
new file mode 100644
index 000000000..627d5952a
--- /dev/null
+++ b/src/test/resources/test-rom/spec/programs/turtle/unequip_spec.lua
@@ -0,0 +1,69 @@
+local capture = require "test_helpers".capture_program
+
+describe("The turtle unequip program", function()
+    it("errors when not a turtle", function()
+        stub(_G, "turtle", nil)
+
+        expect(capture(stub, "/rom/programs/turtle/unequip.lua"))
+        :matches { ok = true, output = "", error = "Requires a Turtle\n" }
+    end)
+
+
+    it("displays its usage when given no arguments", function()
+        stub(_G, "turtle", {})
+
+        expect(capture(stub, "/rom/programs/turtle/unequip.lua"))
+        :matches { ok = true, output = "Usage: /rom/programs/turtle/unequip.lua <side>\n", error = "" }
+    end)
+
+    it("says when nothing was unequipped", function()
+        stub(_G, "turtle", {
+            select = function() end,
+            getItemCount = function() return 0 end,
+            equipRight = function() return true end,
+            equipLeft = function() return true end,
+        })
+
+        expect(capture(stub, "/rom/programs/turtle/unequip.lua left"))
+        :matches { ok = true, output = "Nothing to unequip\n", error = "" }
+        expect(capture(stub, "/rom/programs/turtle/unequip.lua right"))
+        :matches { ok = true, output = "Nothing to unequip\n", error = "" }
+    end)
+
+    it("unequips a upgrade", function()
+        local item_count = 0
+        stub(_G, "turtle", {
+            select = function() end,
+            getItemCount = function() return item_count end,
+            equipRight = function()
+                item_count = 1
+                return true
+            end,
+            equipLeft = function()
+                item_count = 1
+                return true
+            end,
+        })
+
+        expect(capture(stub, "/rom/programs/turtle/unequip.lua left"))
+        :matches { ok = true, output = "Item unequipped\n", error = "" }
+        item_count = 0
+        expect(capture(stub, "/rom/programs/turtle/unequip.lua right"))
+        :matches { ok = true, output = "Item unequipped\n", error = "" }
+    end)
+
+    it("fails when the turtle is full", function()
+        stub(_G, "turtle", {
+            select = function() end,
+            getItemCount = function() return 1 end,
+            equipRight = function() return true end,
+            equipLeft = function() return true end,
+        })
+
+        expect(capture(stub, "/rom/programs/turtle/unequip.lua left"))
+        :matches { ok = true, output = "No space to unequip item\n", error = "" }
+        expect(capture(stub, "/rom/programs/turtle/unequip.lua right"))
+        :matches { ok = true, output = "No space to unequip item\n", error = "" }
+    end)
+
+end)