8bitworkshop/gen/vic20-4I7VOXDQ.js.map

{
  "version": 3,
  "sources": ["../src/machine/vic20.ts", "../src/platform/vic20.ts"],
  "sourcesContent": ["\n//// WASM Machine\n\n// http://www.zimmers.net/anonftp/pub/cbm/documents/chipdata/VIC-I.txt\n// http://www.zimmers.net/anonftp/pub/cbm/maps/Vic20.MemoryMap.txt\n// http://sleepingelephant.com/denial/wiki/index.php/Autostart\n\nimport { Machine } from \"../common/baseplatform\";\nimport { Probeable, TrapCondition } from \"../common/devices\";\nimport { KeyFlags } from \"../common/emu\";\nimport { hex } from \"../common/util\";\nimport { BaseWASMMachine } from \"../common/wasmplatform\";\n\nexport class VIC20_WASMMachine extends BaseWASMMachine implements Machine, Probeable {\n\n  numTotalScanlines = 312;\n  cpuCyclesPerLine = 71;\n  videoOffsetBytes = -24 * 4;\n\n  prgstart : number;\n  joymask0 = 0;\n  joymask1 = 0;\n\n  getBIOSLength() { return 0x5000 };\n\n  loadBIOS(srcArray: Uint8Array) {\n    super.loadBIOS(srcArray);\n  }\n  reset() {\n    super.reset();\n    // clear keyboard\n    for (var ch=0; ch<128; ch++) {\n      this.setKeyInput(ch, 0, KeyFlags.KeyUp);\n    }\n    // load rom\n    if (this.romptr && this.romlen) {\n      let rom = this.romarr;\n      this.exports.machine_load_rom(this.sys, this.romptr, this.romlen);\n      let iscart = rom[4+2]==0x41 && rom[5+2]==0x30 && rom[6+2]==0xC3 && rom[7+2]==0xC2 && rom[8+2]==0xCD;\n      if (!iscart) {\n        this.prgstart = rom[0] + (rom[1]<<8); // get load address\n        // look for BASIC program start\n        if (this.prgstart == 0x1001) {\n          this.prgstart = rom[2] + (rom[3]<<8) + 2; // point to after BASIC program\n          console.log(\"prgstart\", hex(this.prgstart));\n        }\n        // is program loaded into RAM?\n        if (this.prgstart < 0x8000) {\n          // advance BIOS a few frames\n          this.exports.machine_exec(this.sys, 500000);\n          // type in command (SYS 2061)\n          var cmd = \"SYS \"+this.prgstart+\"\\r\";\n          console.log(cmd);\n          for (var i=0; i<cmd.length; i++) {\n            var key = cmd.charCodeAt(i);\n            this.exports.machine_exec(this.sys, 10000);\n            this.exports.machine_exec(this.sys, 10000);\n            this.exports.machine_key_down(this.sys, key);\n            this.exports.machine_exec(this.sys, 10000);\n            this.exports.machine_exec(this.sys, 10000);\n            this.exports.machine_key_up(this.sys, key);\n          }\n          // advance clock until program starts\n          for (var i=0; i<10000 && this.getPC() != this.prgstart; i++) {\n            this.exports.machine_tick(this.sys);\n          }\n        }\n      } else {\n        // get out of reset\n        //this.exports.machine_exec(this.sys, 100);\n        // wait until cartridge start\n        // TODO: detect ROM cartridge\n        var warmstart = this.romarr[0x2+2] + this.romarr[0x3+2]*256;\n        for (var i=0; i<10000 && this.getPC() != warmstart; i++) {\n          this.exports.machine_tick(this.sys);\n        }\n        console.log('cart', i, hex(warmstart));\n      }\n      // TODO: shouldn't we return here @ start of frame?\n      // and stop probing\n    }\n  }\n  advanceFrame(trap: TrapCondition) : number {\n    // TODO: does this sync with VSYNC?\n    var scanline = this.getRasterY();\n    var clocks = Math.floor((this.numTotalScanlines - scanline) * 22152 / this.numTotalScanlines);\n    var probing = this.probe != null;\n    if (probing) this.exports.machine_reset_probe_buffer();\n    clocks = super.advanceFrameClock(trap, clocks);\n    if (probing) this.copyProbeData();\n    return clocks;\n  }\n  getRasterY() {\n    return this.exports.machine_get_raster_line(this.sys);\n  }\n  getCPUState() {\n    this.exports.machine_save_cpu_state(this.sys, this.cpustateptr);\n    var s = this.cpustatearr;\n    var pc = s[2] + (s[3]<<8);\n    return {\n      PC:pc,\n      SP:s[9],\n      A:s[6],\n      X:s[7],\n      Y:s[8],\n      C:s[10] & 1,\n      Z:s[10] & 2,\n      I:s[10] & 4,\n      D:s[10] & 8,\n      V:s[10] & 64,\n      N:s[10] & 128,\n      o:this.readConst(pc),\n    }\n  }\n  saveState() {\n    this.exports.machine_save_state(this.sys, this.stateptr);\n    retu
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