mirror of
https://github.com/sehugg/8bitworkshop.git
synced 2024-11-29 14:51:17 +00:00
cleaned up galaxian platform
This commit is contained in:
Steven Hugg
parent
698d0c616c
commit
43f65b99ae
@ -1,4 +1,3 @@
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"use strict";
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import { Platform, BaseZ80Platform } from "../baseplatform";
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import { PLATFORMS, RAM, newAddressDecoder, padBytes, noise, setKeyboardFromMap, AnimationTimer, RasterVideo, Keys, makeKeycodeMap } from "../emu";
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@ -6,8 +5,8 @@ import { hex } from "../util";
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import { MasterAudio, AY38910_Audio } from "../audio";
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const GALAXIAN_PRESETS = [
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{id:'gfxtest.c', name:'Graphics Test'},
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{id:'shoot2.c', name:'Solarian Game'},
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{ id: 'gfxtest.c', name: 'Graphics Test' },
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{ id: 'shoot2.c', name: 'Solarian Game' },
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];
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const GALAXIAN_KEYCODE_MAP = makeKeycodeMap([
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@ -37,127 +36,108 @@ const SCRAMBLE_KEYCODE_MAP = makeKeycodeMap([
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//[Keys.VK_UP, 2, -0x10],
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]);
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const GalaxianVideo = function(rom:Uint8Array, vram:RAM, oram:RAM, palette:Uint32Array, options) {
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const _GalaxianPlatform = function(mainElement, options) {
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options = options || {};
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var romSize = options.romSize || 0x4000;
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var gfxBase = options.gfxBase || 0x2800;
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var palBase = options.palBase || 0x3800;
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var keyMap = options.keyMap || GALAXIAN_KEYCODE_MAP;
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var missileWidth = options.missileWidth || 4;
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var missileOffset = options.missileOffset || 0;
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var cpu;
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var ram, vram, oram : RAM;
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var membus, iobus, rom, palette, outlatches;
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var video, audio, timer, pixels;
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var psg1, psg2;
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var inputs;
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var interruptEnabled = 0;
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var starsEnabled = 0;
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var watchdog_counter;
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var frameCounter = 0;
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var XTAL = 18432000.0;
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var scanlinesPerFrame = 264;
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var cpuFrequency = XTAL/6; // 3.072 MHz
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var hsyncFrequency = XTAL/3/192/2; // 16 kHz
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var vsyncFrequency = hsyncFrequency/132/2; // 60.606060 Hz
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var vblankDuration = 1/vsyncFrequency * (20/132); // 2500 us
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var cpuCyclesPerLine = cpuFrequency/hsyncFrequency;
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var INITIAL_WATCHDOG = 8;
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var showOffscreenObjects = false;
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this.missileWidth = options.missileWidth || 4;
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this.missileOffset = options.missileOffset || 0;
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this.showOffscreenObjects = false;
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this.frameCounter = 0;
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this.starsEnabled = 0;
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var stars = [];
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for (var i=0; i<256; i++)
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for (var i = 0; i < 256; i++)
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stars[i] = noise();
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function drawScanline(pixels, sl) {
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if (sl < 16 && !showOffscreenObjects) return; // offscreen
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if (sl >= 240 && !showOffscreenObjects) return; // offscreen
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this.advanceFrame = function() {
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this.frameCounter = (this.frameCounter + 1) & 0xff;
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}
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this.drawScanline = function(pixels, sl) {
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if (sl < 16 && !this.showOffscreenObjects) return; // offscreen
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if (sl >= 240 && !this.showOffscreenObjects) return; // offscreen
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// draw tiles
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var pixofs = sl*264;
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var pixofs = sl * 264;
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var outi = pixofs; // starting output pixel in frame buffer
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for (var xx=0; xx<32; xx++) {
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for (var xx = 0; xx < 32; xx++) {
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var xofs = xx;
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var scroll = oram.mem[xofs*2]; // even entries control scroll position
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var attrib = oram.mem[xofs*2+1]; // odd entries control the color base
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var scroll = oram.mem[xofs * 2]; // even entries control scroll position
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var attrib = oram.mem[xofs * 2 + 1]; // odd entries control the color base
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var sl2 = (sl + scroll) & 0xff;
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var vramofs = (sl2>>3)<<5; // offset in VRAM
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var vramofs = (sl2 >> 3) << 5; // offset in VRAM
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var yy = sl2 & 7; // y offset within tile
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var tile = vram.mem[vramofs+xofs]; // TODO: why undefined?
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var tile = vram.mem[vramofs + xofs]; // TODO: why undefined?
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var color0 = (attrib & 7) << 2;
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var addr = gfxBase+(tile<<3)+yy;
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var addr = gfxBase + (tile << 3) + yy;
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var data1 = rom[addr];
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var data2 = rom[addr+0x800];
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for (var i=0; i<8; i++) {
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var bm = 128>>i;
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var color = color0 + ((data1&bm)?1:0) + ((data2&bm)?2:0);
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var data2 = rom[addr + 0x800];
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for (var i = 0; i < 8; i++) {
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var bm = 128 >> i;
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var color = color0 + ((data1 & bm) ? 1 : 0) + ((data2 & bm) ? 2 : 0);
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pixels[outi] = palette[color];
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outi++;
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}
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}
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// draw sprites
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for (var sprnum=7; sprnum>=0; sprnum--) {
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var base = (sprnum<<2) + 0x40;
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for (var sprnum = 7; sprnum >= 0; sprnum--) {
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var base = (sprnum << 2) + 0x40;
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var base0 = oram.mem[base];
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var sy = 240 - (base0 - ((sprnum<3)?1:0)); // the first three sprites match against y-1
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var sy = 240 - (base0 - ((sprnum < 3) ? 1 : 0)); // the first three sprites match against y-1
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var yy = (sl - sy);
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if (yy >= 0 && yy < 16) {
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var sx = oram.mem[base+3] + 1; // +1 pixel offset from tiles
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if (sx == 0 && !showOffscreenObjects)
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var sx = oram.mem[base + 3] + 1; // +1 pixel offset from tiles
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if (sx == 0 && !this.showOffscreenObjects)
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continue; // drawn off-buffer
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var code = oram.mem[base+1];
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var code = oram.mem[base + 1];
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var flipx = code & 0x40; // TODO: flipx
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if (code & 0x80) // flipy
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yy = 15-yy;
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yy = 15 - yy;
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code &= 0x3f;
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var color0 = (oram.mem[base+2] & 7) << 2;
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var color0 = 0;
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var addr = gfxBase+(code<<5)+(yy<8?yy:yy+8);
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var color0 = (oram.mem[base + 2] & 7) << 2;
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var addr = gfxBase + (code << 5) + (yy < 8 ? yy : yy + 8);
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outi = pixofs + sx; //<< 1
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var data1 = rom[addr];
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var data2 = rom[addr+0x800];
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for (var i=0; i<8; i++) {
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var bm = 128>>i;
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var color = ((data1&bm)?1:0) + ((data2&bm)?2:0);
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var data2 = rom[addr + 0x800];
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for (var i = 0; i < 8; i++) {
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var bm = 128 >> i;
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var color = ((data1 & bm) ? 1 : 0) + ((data2 & bm) ? 2 : 0);
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if (color)
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pixels[flipx?(outi+15-i):(outi+i)] = palette[color0 + color];
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pixels[flipx ? (outi + 15 - i) : (outi + i)] = palette[color0 + color];
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}
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var data1 = rom[addr+8];
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var data2 = rom[addr+0x808];
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for (var i=0; i<8; i++) {
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var bm = 128>>i;
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var color = ((data1&bm)?1:0) + ((data2&bm)?2:0);
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var data1 = rom[addr + 8];
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var data2 = rom[addr + 0x808];
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for (var i = 0; i < 8; i++) {
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var bm = 128 >> i;
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var color = ((data1 & bm) ? 1 : 0) + ((data2 & bm) ? 2 : 0);
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if (color)
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pixels[flipx?(outi+7-i):(outi+i+8)] = palette[color0 + color];
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pixels[flipx ? (outi + 7 - i) : (outi + i + 8)] = palette[color0 + color];
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}
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}
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}
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// draw bullets/shells
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var shell = 0xff;
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var missile = 0xff;
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for (var which=0; which<8; which++) {
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var sy = oram.mem[0x60 + (which<<2)+1];
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if (((sy + sl - ((which<3)?1:0))&0xff) == 0xff) {
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for (var which = 0; which < 8; which++) {
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var sy = oram.mem[0x60 + (which << 2) + 1];
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if (((sy + sl - ((which < 3) ? 1 : 0)) & 0xff) == 0xff) {
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if (which != 7)
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shell = which;
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else
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missile = which;
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}
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}
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for (var i=0; i<2; i++) {
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for (var i = 0; i < 2; i++) {
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which = i ? missile : shell;
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if (which != 0xff) {
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var sx = 255 - oram.mem[0x60 + (which<<2)+3];
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var outi = pixofs+sx-missileOffset;
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var sx = 255 - oram.mem[0x60 + (which << 2) + 3];
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var outi = pixofs + sx - this.missileOffset;
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var col = which == 7 ? 0xffffff00 : 0xffffffff;
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for (var j=0; j<missileWidth; j++)
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for (var j = 0; j < this.missileWidth; j++)
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pixels[outi++] = col;
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}
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}
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// draw stars
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if (starsEnabled) {
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var starx = ((frameCounter + stars[sl & 0xff]) & 0xff);
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if (this.starsEnabled) {
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var starx = ((this.frameCounter + stars[sl & 0xff]) & 0xff);
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if ((starx + sl) & 0x10) {
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var outi = pixofs + starx;
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if ((pixels[outi] & 0xffffff) == 0) {
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@ -167,9 +147,36 @@ const _GalaxianPlatform = function(mainElement, options) {
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}
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}
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}
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const _GalaxianPlatform = function(mainElement, options) {
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options = options || {};
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var romSize = options.romSize || 0x4000;
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var palBase = options.palBase || 0x3800;
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var keyMap = options.keyMap || GALAXIAN_KEYCODE_MAP;
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var cpu;
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var ram, vram, oram: RAM;
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var membus, iobus, rom, palette, outlatches;
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var video, audio, timer, pixels;
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var psg1, psg2;
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var inputs;
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var interruptEnabled = 0;
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var watchdog_counter;
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var XTAL = 18432000.0;
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var scanlinesPerFrame = 264;
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var cpuFrequency = XTAL / 6; // 3.072 MHz
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var hsyncFrequency = XTAL / 3 / 192 / 2; // 16 kHz
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var vsyncFrequency = hsyncFrequency / 132 / 2; // 60.606060 Hz
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var vblankDuration = 1 / vsyncFrequency * (20 / 132); // 2500 us
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var cpuCyclesPerLine = cpuFrequency / hsyncFrequency;
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var INITIAL_WATCHDOG = 8;
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var gfx; // = new GalaxianVideo(rom, vram, oram, palette, options);
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var m_protection_state = 0;
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var m_protection_result = 0;
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function scramble_protection_w(addr,data) {
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function scramble_protection_w(addr, data) {
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/*
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This is not fully understood; the low 4 bits of port C are
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inputs; the upper 4 bits are outputs. Scramble main set always
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@ -177,8 +184,7 @@ const _GalaxianPlatform = function(mainElement, options) {
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expects certain results in the upper nibble afterwards.
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*/
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m_protection_state = (m_protection_state << 4) | (data & 0x0f);
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switch (m_protection_state & 0xfff)
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{
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switch (m_protection_state & 0xfff) {
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/* scramble */
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case 0xf09: m_protection_result = 0xff; break;
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case 0xa49: m_protection_result = 0xbf; break;
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@ -192,7 +198,7 @@ const _GalaxianPlatform = function(mainElement, options) {
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}
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function scramble_protection_alt_r() {
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var bit = (m_protection_result >> 7) & 1;
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return (bit << 5) | ((bit^1) << 7);
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return (bit << 5) | ((bit ^ 1) << 7);
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}
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const bitcolors = [
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@ -203,7 +209,7 @@ const _GalaxianPlatform = function(mainElement, options) {
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class GalaxianPlatform extends BaseZ80Platform implements Platform {
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scanline : number;
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scanline: number;
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poller;
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getPresets() {
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@ -214,15 +220,19 @@ const _GalaxianPlatform = function(mainElement, options) {
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ram = new RAM(0x800);
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vram = new RAM(0x400);
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oram = new RAM(0x100);
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rom = new Uint8Array(romSize);
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palette = new Uint32Array(new ArrayBuffer(32 * 4));
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gfx = new GalaxianVideo(rom, vram, oram, palette, options);
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outlatches = new RAM(0x8);
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if (options.scramble) {
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inputs = [0xff,0xfc,0xf1];
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inputs = [0xff, 0xfc, 0xf1];
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membus = {
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read: newAddressDecoder([
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[0x0000, 0x3fff, 0, function(a) { return rom ? rom[a] : null; }],
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[0x4000, 0x47ff, 0x7ff, function(a) { return ram.mem[a]; }],
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// [0x4800, 0x4fff, 0x3ff, function(a) { return vram.mem[a]; }],
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// [0x5000, 0x5fff, 0xff, function(a) { return oram.mem[a]; }],
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// [0x4800, 0x4fff, 0x3ff, function(a) { return vram.mem[a]; }],
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// [0x5000, 0x5fff, 0xff, function(a) { return oram.mem[a]; }],
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[0x7000, 0x7000, 0, function(a) { watchdog_counter = INITIAL_WATCHDOG; }],
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[0x7800, 0x7800, 0, function(a) { watchdog_counter = INITIAL_WATCHDOG; }],
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//[0x8000, 0x820f, 0, function(a) { return noise(); }], // TODO: remove
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@ -237,15 +247,15 @@ const _GalaxianPlatform = function(mainElement, options) {
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//[0, 0xffff, 0, function(a) { console.log(hex(a)); return 0; }]
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]),
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write: newAddressDecoder([
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[0x4000, 0x47ff, 0x7ff, function(a,v) { ram.mem[a] = v; }],
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[0x4800, 0x4fff, 0x3ff, function(a,v) { vram.mem[a] = v; }],
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[0x5000, 0x5fff, 0xff, function(a,v) { oram.mem[a] = v; }],
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[0x6801, 0x6801, 0, function(a,v) { interruptEnabled = v & 1; /*console.log(a,v,cpu.getPC().toString(16));*/ }],
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[0x6802, 0x6802, 0, function(a,v) { /* TODO: coin counter */ }],
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[0x6803, 0x6803, 0, function(a,v) { /* TODO: backgroundColor = (v & 1) ? 0xFF000056 : 0xFF000000; */ }],
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[0x6804, 0x6804, 0, function(a,v) { starsEnabled = v & 1; }],
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[0x6808, 0x6808, 0, function(a,v) { missileWidth = v; }], // not on h/w
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[0x6809, 0x6809, 0, function(a,v) { missileOffset = v; }], // not on h/w
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[0x4000, 0x47ff, 0x7ff, function(a, v) { ram.mem[a] = v; }],
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[0x4800, 0x4fff, 0x3ff, function(a, v) { vram.mem[a] = v; }],
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[0x5000, 0x5fff, 0xff, function(a, v) { oram.mem[a] = v; }],
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[0x6801, 0x6801, 0, function(a, v) { interruptEnabled = v & 1; /*console.log(a,v,cpu.getPC().toString(16));*/ }],
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[0x6802, 0x6802, 0, function(a, v) { /* TODO: coin counter */ }],
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[0x6803, 0x6803, 0, function(a, v) { /* TODO: backgroundColor = (v & 1) ? 0xFF000056 : 0xFF000000; */ }],
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[0x6804, 0x6804, 0, function(a, v) { gfx.starsEnabled = v & 1; }],
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[0x6808, 0x6808, 0, function(a, v) { gfx.missileWidth = v; }], // not on h/w
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[0x6809, 0x6809, 0, function(a, v) { gfx.missileOffset = v; }], // not on h/w
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[0x8202, 0x8202, 0, scramble_protection_w],
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//[0x8100, 0x8103, 0, function(a,v){ /* PPI 0 */ }],
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//[0x8200, 0x8203, 0, function(a,v){ /* PPI 1 */ }],
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@ -253,7 +263,7 @@ const _GalaxianPlatform = function(mainElement, options) {
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]),
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};
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} else {
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inputs = [0xe,0x8,0x0];
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inputs = [0xe, 0x8, 0x0];
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membus = {
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read: newAddressDecoder([
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[0x0000, 0x3fff, 0, function(a) { return rom ? rom[a] : null; }],
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@ -266,15 +276,15 @@ const _GalaxianPlatform = function(mainElement, options) {
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[0x7800, 0x7800, 0, function(a) { watchdog_counter = INITIAL_WATCHDOG; }],
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]),
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write: newAddressDecoder([
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[0x4000, 0x47ff, 0x3ff, function(a,v) { ram.mem[a] = v; }],
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[0x5000, 0x57ff, 0x3ff, function(a,v) { vram.mem[a] = v; }],
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[0x5800, 0x5fff, 0xff, function(a,v) { oram.mem[a] = v; }],
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[0x4000, 0x47ff, 0x3ff, function(a, v) { ram.mem[a] = v; }],
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[0x5000, 0x57ff, 0x3ff, function(a, v) { vram.mem[a] = v; }],
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[0x5800, 0x5fff, 0xff, function(a, v) { oram.mem[a] = v; }],
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//[0x6004, 0x6007, 0x3, function(a,v) { }], // lfo freq
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//[0x6800, 0x6807, 0x7, function(a,v) { }], // sound
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//[0x7800, 0x7800, 0x7, function(a,v) { }], // pitch
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[0x6000, 0x6003, 0x3, function(a,v) { outlatches.mem[a] = v; }],
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[0x7001, 0x7001, 0, function(a,v) { interruptEnabled = v & 1; }],
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[0x7004, 0x7004, 0, function(a,v) { starsEnabled = v & 1; }],
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[0x6000, 0x6003, 0x3, function(a, v) { outlatches.mem[a] = v; }],
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[0x7001, 0x7001, 0, function(a, v) { interruptEnabled = v & 1; }],
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[0x7004, 0x7004, 0, function(a, v) { gfx.starsEnabled = v & 1; }],
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]),
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isContended: function() { return false; },
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};
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@ -294,7 +304,7 @@ const _GalaxianPlatform = function(mainElement, options) {
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}
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};
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cpu = this.newCPU(membus, iobus);
|
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video = new RasterVideo(mainElement,264,264,{rotate:90});
|
||||
video = new RasterVideo(mainElement, 264, 264, { rotate: 90 });
|
||||
video.create();
|
||||
var idata = video.getFrameData();
|
||||
this.poller = setKeyboardFromMap(video, inputs, keyMap);
|
||||
@ -308,19 +318,19 @@ const _GalaxianPlatform = function(mainElement, options) {
|
||||
return (a == 0x7000 || a == 0x7800) ? null : membus.read(a); // ignore watchdog
|
||||
}
|
||||
|
||||
advance(novideo : boolean) {
|
||||
for (var sl=0; sl<scanlinesPerFrame; sl++) {
|
||||
advance(novideo: boolean) {
|
||||
for (var sl = 0; sl < scanlinesPerFrame; sl++) {
|
||||
this.scanline = sl;
|
||||
if (!novideo) {
|
||||
drawScanline(pixels, sl);
|
||||
gfx.drawScanline(pixels, sl);
|
||||
}
|
||||
this.runCPU(cpu, cpuCyclesPerLine);
|
||||
}
|
||||
// visible area is 256x224 (before rotation)
|
||||
if (!novideo) {
|
||||
video.updateFrame(0, 0, 0, 0, showOffscreenObjects ? 264 : 256, 264);
|
||||
video.updateFrame(0, 0, 0, 0, gfx.showOffscreenObjects ? 264 : 256, 264);
|
||||
}
|
||||
frameCounter = (frameCounter + 1) & 0xff;
|
||||
gfx.advanceFrame();
|
||||
if (watchdog_counter-- <= 0) {
|
||||
console.log("WATCHDOG FIRED, PC ", hex(cpu.getPC())); // TODO: alert on video
|
||||
this.reset();
|
||||
@ -332,16 +342,16 @@ const _GalaxianPlatform = function(mainElement, options) {
|
||||
getRasterScanline() { return this.scanline; }
|
||||
|
||||
loadROM(title, data) {
|
||||
rom = padBytes(data, romSize);
|
||||
rom.set(padBytes(data, romSize));
|
||||
|
||||
palette = new Uint32Array(new ArrayBuffer(32*4));
|
||||
for (var i=0; i<32; i++) {
|
||||
var b = rom[palBase+i];
|
||||
for (var i = 0; i < 32; i++) {
|
||||
var b = rom[palBase + i];
|
||||
palette[i] = 0xff000000;
|
||||
for (var j=0; j<8; j++)
|
||||
if (((1<<j) & b))
|
||||
for (var j = 0; j < 8; j++)
|
||||
if (((1 << j) & b))
|
||||
palette[i] += bitcolors[j];
|
||||
}
|
||||
|
||||
this.reset();
|
||||
}
|
||||
|
||||
@ -352,25 +362,25 @@ const _GalaxianPlatform = function(mainElement, options) {
|
||||
oram.mem.set(state.bo);
|
||||
watchdog_counter = state.wdc;
|
||||
interruptEnabled = state.ie;
|
||||
starsEnabled = state.se;
|
||||
frameCounter = state.fc;
|
||||
gfx.starsEnabled = state.se;
|
||||
gfx.frameCounter = state.fc;
|
||||
inputs[0] = state.in0;
|
||||
inputs[1] = state.in1;
|
||||
inputs[2] = state.in2;
|
||||
}
|
||||
saveState() {
|
||||
return {
|
||||
c:this.getCPUState(),
|
||||
b:ram.mem.slice(0),
|
||||
bv:vram.mem.slice(0),
|
||||
bo:oram.mem.slice(0),
|
||||
fc:frameCounter,
|
||||
ie:interruptEnabled,
|
||||
se:starsEnabled,
|
||||
wdc:watchdog_counter,
|
||||
in0:inputs[0],
|
||||
in1:inputs[1],
|
||||
in2:inputs[2],
|
||||
c: this.getCPUState(),
|
||||
b: ram.mem.slice(0),
|
||||
bv: vram.mem.slice(0),
|
||||
bo: oram.mem.slice(0),
|
||||
fc: gfx.frameCounter,
|
||||
ie: interruptEnabled,
|
||||
se: gfx.starsEnabled,
|
||||
wdc: watchdog_counter,
|
||||
in0: inputs[0],
|
||||
in1: inputs[1],
|
||||
in2: inputs[2],
|
||||
};
|
||||
}
|
||||
loadControlsState(state) {
|
||||
@ -380,9 +390,9 @@ const _GalaxianPlatform = function(mainElement, options) {
|
||||
}
|
||||
saveControlsState() {
|
||||
return {
|
||||
in0:inputs[0],
|
||||
in1:inputs[1],
|
||||
in2:inputs[2],
|
||||
in0: inputs[0],
|
||||
in1: inputs[1],
|
||||
in2: inputs[2],
|
||||
};
|
||||
}
|
||||
getCPUState() {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user