131 lines
4.1 KiB
TypeScript
131 lines
4.1 KiB
TypeScript
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import { MOS6502, MOS6502State } from "../common/cpu/MOS6502";
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import { BasicMachine, RasterFrameBased, Bus, ProbeAll } from "../common/devices";
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import { KeyFlags, newAddressDecoder, padBytes, Keys, makeKeycodeMap, newKeyboardHandler, EmuHalt, dumpRAM } from "../common/emu";
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import { lzgmini, stringToByteArray, hex, rgb2bgr } from "../common/util";
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//// WASM Machine
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import { Machine } from "../common/baseplatform";
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import { TrapCondition } from "../common/devices";
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import { BaseWASMMachine } from "../common/wasmplatform";
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export class ZX_WASMMachine extends BaseWASMMachine implements Machine {
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numTotalScanlines = 312;
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cpuCyclesPerLine = 224;
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joymask0 = 0;
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reset() {
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super.reset();
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// advance bios
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this.exports.machine_exec(this.sys, 2000000);
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// load rom (Z80 header: https://worldofspectrum.org/faq/reference/z80format.htm)
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if (this.romptr && this.romlen) {
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// TODO
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this.exports.machine_load_rom(this.sys, this.romptr, this.romlen);
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/*
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var romstart = 0x5ccb;
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for (var i=0; i<this.romlen; i++) {
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this.exports.machine_mem_write(this.sys, romstart+i, this.romarr[i]);
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}
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*/
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}
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// clear keyboard
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for (var ch=0; ch<128; ch++) {
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this.setKeyInput(ch, 0, KeyFlags.KeyUp);
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}
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}
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advanceFrame(trap: TrapCondition) : number {
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//var scanline = this.exports.machine_get_raster_line(this.sys);
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var probing = this.probe != null;
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if (probing) this.exports.machine_reset_probe_buffer();
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var clocks = super.advanceFrameClock(trap, Math.floor(3500000 / 50));
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if (probing) this.copyProbeData();
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return clocks;
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}
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/*
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z80_tick_t tick_cb; // 0
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uint64_t bc_de_hl_fa; // 8
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uint64_t bc_de_hl_fa_; // 16
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uint64_t wz_ix_iy_sp; // 24
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uint64_t im_ir_pc_bits; // 32
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uint64_t pins; // 48
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void* user_data;
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z80_trap_t trap_cb;
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void* trap_user_data;
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int trap_id;
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*/
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getCPUState() {
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this.exports.machine_save_cpu_state(this.sys, this.cpustateptr);
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var s = this.cpustatearr;
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var af = s[9] + (s[8]<<8); // not FA
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var hl = s[10] + (s[11]<<8);
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var de = s[12] + (s[13]<<8);
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var bc = s[14] + (s[15]<<8);
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var sp = s[24] + (s[25]<<8);
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var iy = s[26] + (s[27]<<8);
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var ix = s[28] + (s[29]<<8);
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var pc = s[34] + (s[35]<<8);
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var ir = s[36] + (s[37]<<8);
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return {
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PC:pc,
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SP:sp,
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AF:af,
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BC:bc,
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DE:de,
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HL:hl,
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IX:ix,
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IY:iy,
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IR:ir,
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o:this.readConst(pc),
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}
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}
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saveState() {
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this.exports.machine_save_state(this.sys, this.stateptr);
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return {
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c:this.getCPUState(),
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state:this.statearr.slice(0),
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};
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}
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loadState(state) : void {
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this.statearr.set(state.state);
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this.exports.machine_load_state(this.sys, this.stateptr);
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}
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getVideoParams() {
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return {width:320, height:256, overscan:true, videoFrequency:50};
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}
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setKeyInput(key: number, code: number, flags: number): void {
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// TODO: handle shifted keys
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if (key == 16 || key == 17 || key == 18 || key == 224) return; // meta keys
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//console.log(key, code, flags);
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//if (flags & KeyFlags.Shift) { key += 64; }
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// convert to c64 (TODO: zx)
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var mask = 0;
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var mask2 = 0;
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if (key == 37) { key = 0x8; mask = 0x4; } // LEFT
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if (key == 38) { key = 0xb; mask = 0x1; } // UP
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if (key == 39) { key = 0x9; mask = 0x8; } // RIGHT
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if (key == 40) { key = 0xa; mask = 0x2; } // DOWN
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if (key == 32) { mask = 0x10; } // FIRE
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if (key == 65) { key = 65; mask2 = 0x4; } // LEFT
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if (key == 87) { key = 87; mask2 = 0x1; } // UP
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if (key == 68) { key = 68; mask2 = 0x8; } // RIGHT
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if (key == 83) { key = 83; mask2 = 0x2; } // DOWN
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if (key == 69) { mask2 = 0x10; } // FIRE
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if (key == 113) { key = 0xf1; } // F2
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if (key == 115) { key = 0xf3; } // F4
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if (key == 119) { key = 0xf5; } // F8
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if (key == 121) { key = 0xf7; } // F10
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if (flags & KeyFlags.KeyDown) {
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this.exports.machine_key_down(this.sys, key);
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this.joymask0 |= mask;
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} else if (flags & KeyFlags.KeyUp) {
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this.exports.machine_key_up(this.sys, key);
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this.joymask0 &= ~mask;
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}
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this.exports.zx_joystick(this.sys, this.joymask0, 0);
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}
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}
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