diff --git a/dialogs.cpp b/dialogs.cpp
index f838e97a..22678a24 100644
--- a/dialogs.cpp
+++ b/dialogs.cpp
@@ -600,7 +600,10 @@ namespace dialog {
     else return int(x-.5);
     }
   
-  string disp(ld x) { if(ne.intval) return its(ldtoint(x)); else if(ne.vmax-ne.vmin < 1) return fts4(x); else return fts(x); }
+  string disp(ld x) { 
+    if(dialogflags & sm::HEXEDIT) return "0x" + itsh(x);
+    else if(ne.intval) return its(ldtoint(x)); 
+    else if(ne.vmax-ne.vmin < 1) return fts4(x); else return fts(x); }
 
   reaction_t reaction;
   reaction_t reaction_final;
@@ -615,6 +618,11 @@ namespace dialog {
     anims::deanimate(*ne.editwhat);
     }
   
+  void use_hexeditor() {
+    dialogflags |= sm::HEXEDIT;
+    ne.s = disp(*ne.editwhat);
+    }
+  
   void apply_edit() {
     exp_parser ep;
     ep.s = ne.s;
diff --git a/hyper.h b/hyper.h
index a3ac0806..ce170878 100644
--- a/hyper.h
+++ b/hyper.h
@@ -1822,6 +1822,7 @@ namespace dialog {
 
   void editNumber(ld& x, ld vmin, ld vmax, ld step, ld dft, string title, string help);
   void editNumber(int& x, int vmin, int vmax, int step, int dft, string title, string help);
+  void use_hexeditor();
   inline void scaleLog() { ne.sc = logarithmic; }
   inline void scaleSinh() { ne.sc = asinhic; }
   void bound_low(ld val);
@@ -2287,6 +2288,7 @@ namespace sm {
   static const int MAYDARK = 16384;
   static const int DIALOG_STRICT_X = 32768; // do not interpret dialog clicks outside of the X region
   static const int EXPANSION = (1<<16);
+  static const int HEXEDIT = (1<<17);
   };
 
 namespace linepatterns {
diff --git a/util.cpp b/util.cpp
index 6f645974..e80034df 100644
--- a/util.cpp
+++ b/util.cpp
@@ -221,6 +221,7 @@ cld exp_parser::parse(int prio) {
     else if(number == "") at = -1;
     else if(number == "s") res = ticks / 1000.;
     else if(number == "ms") res = ticks;
+    else if(number[0] == '0' && number[1] == 'x') res = strtoll(number.c_str()+2, NULL, 16);
     else if(number == "mousex") res = mousex;
     else if(number == "mousey") res = mousey;
     else if(number == "mousez") res = cld(mousex - current_display->xcenter, mousey - current_display->ycenter) / cld(current_display->radius, 0);