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astrocade: worked on arcade emulation
This commit is contained in:
Steven Hugg
parent
0ede0e514b
commit
d08d73f422
@ -71,6 +71,7 @@ const _BallyAstrocade = function(arcade:boolean) {
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const swidth = arcade ? 320 : 160;
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const sheight = arcade ? 204 : 102;
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const swbytes = swidth >> 2;
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const samask = arcade ? 0x3fff : 0xfff;
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const INITIAL_WATCHDOG = 256;
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const PIXEL_ON = 0xffeeeeee;
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const PIXEL_OFF = 0xff000000;
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@ -90,19 +91,19 @@ const _BallyAstrocade = function(arcade:boolean) {
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var palinds = new Uint8Array(8);
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var refreshlines = 0;
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var dirtylines = new Uint8Array(arcade ? 262 : 131);
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var vidactive = false;
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var rotdata = new Uint8Array(4);
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var rotcount = 0;
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var intst = 0;
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var waitstates = 0;
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var patboard = new Uint8Array(0x08);
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var patdest = 0;
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function ramwrite(a: number, v: number) {
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// set RAM
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ram[a] = v;
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waitstates++;
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// mark scanline as dirty
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dirtylines[((a & 0xfff) / swbytes) | 0] = 1;
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dirtylines[((a & samask) / swbytes) | 0] = 1;
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// this was old behavior where we updated instantly
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// but it had problems if we had mid-screen palette changes
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//ramupdate(a, v);
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@ -201,7 +202,105 @@ const _BallyAstrocade = function(arcade:boolean) {
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function refreshall() {
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refreshlines = sheight;
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}
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// bally astrocade pattern board
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// https://github.com/mamedev/mame/blob/7ff10685c56a6e123336c684e5e96fdb9e8b3674/src/mame/midway/astrocde_v.cpp#L726
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function xfer_patboard() {
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let m_pattern_source = patboard[0] | (patboard[1] << 8);
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let m_pattern_mode = patboard[2] & 0x3f;
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let m_pattern_skip = patboard[3];
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let m_pattern_dest = (patdest & 0xff) | (patboard[4] << 8);
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let m_pattern_width = patboard[5];
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let m_pattern_height = patboard[6] + 1;
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let curwidth: number;
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let u13ff: number = 0;
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let cycles: number = 0;
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u13ff = 0;
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if ((m_pattern_mode & 0x02) === 0) {
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u13ff = 1;
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}
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function incrementSource(): void {
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if (u13ff && (m_pattern_mode & 0x04) !== 0 && (curwidth !== 0 || (m_pattern_mode & 0x08) === 0)) {
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m_pattern_source++;
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}
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if ((m_pattern_mode & 0x02) !== 0) {
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u13ff ^= 1;
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}
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}
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function incrementDest(): void {
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if (curwidth !== 0) {
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if ((m_pattern_mode & 0x20) !== 0) {
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m_pattern_dest++;
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} else {
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m_pattern_dest--;
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}
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}
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}
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// Loop over height
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while (m_pattern_height >= 0) {
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let carry: number;
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curwidth = m_pattern_width;
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// Loop over width
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while (curwidth >= 0) {
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let busaddr: number;
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let busdata: number;
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// Read Phase
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busaddr = (m_pattern_mode & 0x01) === 0 ? m_pattern_source : m_pattern_dest;
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if (curwidth === 0 && (m_pattern_mode & 0x08) !== 0) {
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busdata = 0;
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} else {
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busdata = membus.read(m_pattern_source);
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}
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if ((m_pattern_mode & 0x01) === 0) {
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incrementSource();
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} else {
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incrementDest();
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}
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// Write Phase
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busaddr = (m_pattern_mode & 0x01) !== 0 ? m_pattern_source : m_pattern_dest;
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ramwrite(busaddr, busdata);
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if ((m_pattern_mode & 0x01) === 0) {
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incrementDest();
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} else {
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incrementSource();
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}
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cycles += 4;
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curwidth--;
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}
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// At the end of each row, adjust m_pattern_dest
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carry = ((m_pattern_dest & 0xff) + m_pattern_skip) & 0x100;
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m_pattern_dest = (m_pattern_dest & 0xff00) | ((m_pattern_dest + m_pattern_skip) & 0xff);
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if ((m_pattern_mode & 0x10) === 0) {
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m_pattern_dest += carry;
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} else {
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m_pattern_dest -= carry ^ 0x100;
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}
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m_pattern_height--;
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}
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// Adjust m_maincpu.icount
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// m_maincpu.adjust_icount(-cycles);
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// Replace the above line with the actual adjustment of icount.
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}
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this.drawScanline = (sl:number) => {
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// interrupt
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if (sl == inlin && (inmod & 0x8)) {
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@ -226,9 +325,9 @@ const _BallyAstrocade = function(arcade:boolean) {
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ram = r;
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inputs = inp;
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psg = psgg;
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//bios = padBytes(ASTROCADE_MINIMAL_BIOS, 0x2000);
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bios = padBytes(new lzgmini().decode(stringToByteArray(atob(ASTROLIBRE_BIOS_LZG))), 0x2000);
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if (!arcade) {
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//bios = padBytes(ASTROCADE_MINIMAL_BIOS, 0x2000);
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bios = padBytes(new lzgmini().decode(stringToByteArray(atob(ASTROLIBRE_BIOS_LZG))), 0x2000);
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// game console
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membus = {
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read: newAddressDecoder([
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@ -246,13 +345,14 @@ const _BallyAstrocade = function(arcade:boolean) {
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membus = {
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read: newAddressDecoder([
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[0x4000, 0x7fff, 0x3fff, function(a) { return ram[a]; }], // screen RAM
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[0xd000, 0xdfff, 0xfff, function(a) { return ram[a + 0x4000]; }], // static RAM
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[0x0000, 0xafff, 0xffff, function(a) { return rom ? rom[a] : 0; }], // ROM (0-3fff,8000-afff)
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[0xd000, 0xdfff, 0x0fff, function(a) { return ram[a + 0x4000]; }], // static RAM
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[0x0000, 0x3fff, 0x3fff, function(a) { return rom ? rom[a] : 0; }], // ROM
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[0x8000, 0xbfff, 0x3fff, function(a) { return rom ? rom[a + 0x4000] : 0; }], // ROM
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]),
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write: newAddressDecoder([
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[0x4000, 0x7fff, 0x3fff, ramwrite],
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[0xd000, 0xdfff, 0xfff, function(a, v) { ramwrite(a + 0x4000, v); }], // static RAM
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[0x0000, 0x3fff, 0x3fff, magicwrite],
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[0xd000, 0xdfff, 0x0fff, function(a, v) { ramwrite(a + 0x4000, v); }], // static RAM
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]),
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}
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}
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@ -273,6 +373,19 @@ const _BallyAstrocade = function(arcade:boolean) {
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return rtn;
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},
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write: function(addr, val) {
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if (addr == 0xa55b) {
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// TODO: protected_ram_enable_w
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return;
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}
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addr &= 0xff;
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// pattern board
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if (addr > 0x78 && addr < 0x80) {
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patboard[addr & 7] = val;
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if (addr == 0x72) { patdest = 0; }
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if (addr == 0x74) { patdest = (patdest + patboard[3]) & 0xff; }
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if (addr == 0x7e) { xfer_patboard(); }
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return;
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}
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addr &= 0x1f;
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val &= 0xff;
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switch (addr) {
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@ -332,8 +445,15 @@ const _BallyAstrocade = function(arcade:boolean) {
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case 0x19: // XPAND
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xpand = val;
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break;
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case 0x1a:
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case 0x1b:
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case 0x1c:
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case 0x1d:
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case 0x1e:
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//psg2.setACRegister(addr - 0x1a, val);
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break;
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default:
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console.log('IO write', hex(addr, 4), hex(val, 2));
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//console.log('IO write', hex(addr, 4), hex(val, 2));
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break;
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}
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}
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@ -372,6 +492,8 @@ const _BallyAstrocade = function(arcade:boolean) {
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rotdata.set(state.rotdata);
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intst = state.intst;
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inputs.set(state.inputs);
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patboard.set(state.patboard);
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patdest = state.patdest;
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refreshall();
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}
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@ -393,7 +515,9 @@ const _BallyAstrocade = function(arcade:boolean) {
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verbl: verbl,
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rotcount: rotcount,
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rotdata: rotdata.slice(0),
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intst: intst
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intst: intst,
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patboard: patboard.slice(0),
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patdest: patdest,
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};
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}
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this.reset = () => {
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@ -450,6 +574,7 @@ export class BallyAstrocade extends BasicScanlineMachine implements AcceptsPaddl
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ram : Uint8Array;
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cpu : Z80;
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m; // _BallyAstrocade
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arcade : boolean;
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psg: AstrocadeAudio;
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audioadapter;
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@ -458,6 +583,7 @@ export class BallyAstrocade extends BasicScanlineMachine implements AcceptsPaddl
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constructor(arcade:boolean) {
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super();
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this.arcade = arcade;
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this.cpu = new Z80();
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this.psg = new AstrocadeAudio(new MasterAudio());
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this.audioadapter = new TssChannelAdapter(this.psg.psg, audioOversample, this.sampleRate);
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@ -471,6 +597,12 @@ export class BallyAstrocade extends BasicScanlineMachine implements AcceptsPaddl
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//this.cpuCyclesPerVisible = this.cpuCyclesPerLine - this.cpuCyclesPerHBlank;
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this.m = new _BallyAstrocade(arcade);
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this.m.init(this, this.cpu, this.ram, this.inputs, this.psg);
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if (arcade) {
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this.inputs[0x10] = 0xff; // switches (active low)
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this.inputs[0x11] = 0xff; // switches (active low)
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this.inputs[0x12] = 0x00;
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this.inputs[0x13] = 0x08; // dip switches
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}
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}
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read(a:number) : number {
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@ -556,8 +688,16 @@ export class BallyAstrocade extends BasicScanlineMachine implements AcceptsPaddl
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case 'Astro': return this.m.toLongString(state);
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}
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}
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getRasterCanvasPosition() { return { x: this.getRasterX(), y: this.getRasterY() }; }
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getRasterCanvasPosition() {
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return { x: this.getRasterX(), y: this.getRasterY() };
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}
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getVideoParams() {
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if (this.arcade) {
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return { width: 320, height: 204, rotate: 180 };
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} else {
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return { width: 160, height: 102 };
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}
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}
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}
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/////
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@ -591,16 +731,6 @@ class AstrocadeAudio extends AY38910_Audio {
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}
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}
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export const _BallyArcade = function() {
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this.__proto__ = new (_BallyAstrocade as any)(true);
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// TODO: inputs[0x13] = 0xfe; // dip switch on arcade
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// TODO: arcade controls, bit blit
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var _in = this.saveControlsState();
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_in.in[0x10] = 0xff; // switches
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_in.in[0x13] = 0xfe; // dip switches
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this.loadControlsState(_in);
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}
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/////
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//http://glankonian.com/~lance/astrocade_palette.html
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@ -26,6 +26,10 @@ const ASTROCADE_BIOS_PRESETS = [
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{ id: 'bios.c', name: 'BIOS' },
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];
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const ASTROCADE_ARCADE_PRESETS = [
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{ id: 'hello.c', name: 'Hello Graphics' },
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];
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class BallyAstrocadePlatform extends BaseZ80MachinePlatform<BallyAstrocade> implements Platform {
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newMachine() { return new BallyAstrocade(false); }
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@ -52,10 +56,13 @@ class BallyAstrocadeBIOSPlatform extends BallyAstrocadePlatform implements Platf
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class BallyArcadePlatform extends BallyAstrocadePlatform implements Platform {
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newMachine() { return new BallyAstrocade(true); }
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getPresets() { return ASTROCADE_ARCADE_PRESETS; }
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getMemoryMap = function() { return { main:[
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{name:'ROM',start:0x0,size:0x4000,type:'rom'},
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{name:'Magic RAM',start:0x0,size:0x4000,type:'ram'},
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{name:'Screen RAM',start:0x4000,size:0x4000,type:'ram'},
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{name:'ROM',start:0x8000,size:0x4000,type:'rom'},
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] } };
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}
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