CC-Tweaked/src/main/resources/data/computercraft/recipes/computer_advanced_upgrade.json

{
    "type": "computercraft:computer_upgrade",
    "pattern": [
        "###",
        "#C#",
        "# #"
    ],
    "key": {
        "#": { "tag": "forge:ingots/gold" },
        "C": { "item": "computercraft:computer_normal" }
    },
    "family": "advanced",
    "result": { "item": "computercraft:computer_advanced" }
}