{
  "description": "JSON Schema definition of the known CHIP-8 platforms.",
  "definitions": {
    "platform": {
      "type": "object",
      "properties": {
        "id": {
          "type": "string",
          "description": "An ID for this platform, by which to reference it in programs.json."
        },
        "name": {
          "type": "string",
          "description": "The full name of the platform, by which it is most commonly known."
        },
        "description": {
          "type": "string",
          "description": "A generic description of the platform."
        },
        "release": {
          "type": "string",
          "description": "The date at which the platform was first released in ISO 8601 date format. Can be a year, a year and a month or a year, month and day.",
          "pattern": "^[\\dx\\?]{4}(\\-\\d{1,2}){0,2}$"
        },
        "authors": {
          "type": "array",
          "description": "The list of authors who worked on developing this platform.",
          "items": {
            "type": "string"
          }
        },
        "urls": {
          "type": "array",
          "description": "A list of URLs that are relevant for this platform, like a systems specification or additional materials.",
          "items": {
            "type": "string"
          }
        },
        "copyright": {
          "type": "string",
          "description": "The copyright situation of this platform. May be free form text. If a specific license is known, please use the `license` field instead."
        },
        "license": {
          "type": "string",
          "description": "The license(s) applicable to this platform. Must be an SPDX license expression (see https://spdx.github.io/spdx-spec/v2.3/SPDX-license-expressions/ and https://spdx.org/licenses/)."
        },
        "displayResolutions": {
          "type": "array",
          "description": "All the display resolutions that this platform supports.",
          "items": {
            "type": "string",
            "pattern": "^\\d+x\\d+$"
          }
        },
        "defaultTickrate": {
          "type": "integer",
          "description": "The preferred number of cycles per frame to run the interpreter at. It's the default because ROMs can overwrite this value. CHIP-8 runs at a framerate of 60Hz, so this tickrate times 60 is the desired 'CPU clockspeed' of the system."
        },
        "quirks": {
          "type": "object",
          "description": "The quirk settings as they are known for this platform. Each key references a quirk from quirks.json.",
          "propertyNames": {
            "type": "string",
            "enum": [
              "shift",
              "memoryIncrementByX",
              "memoryLeaveIUnchanged",
              "wrap",
              "jump",
              "vblank",
              "logic"
            ]
          },
          "patternProperties": {
            ".*": {
              "type": "boolean"
            }
          }
        }
      },
      "required": [
        "id",
        "name",
        "displayResolutions",
        "defaultTickrate",
        "quirks"
      ],
      "additionalProperties": false
    }
  },
  "type": "array",
  "items": {
    "$ref": "#/definitions/platform"
  }
}