603 lines
No EOL
22 KiB
JavaScript
603 lines
No EOL
22 KiB
JavaScript
/**************************************************************************
|
|
* SAE - Scripted Amiga Emulator
|
|
*
|
|
* 2012-2015 Rupert Hausberger
|
|
*
|
|
* https://github.com/naTmeg/ScriptedAmigaEmulator
|
|
*
|
|
***************************************************************************
|
|
* Notes: Ported from WinUAE 2.5.0
|
|
*
|
|
**************************************************************************/
|
|
|
|
//copper_states
|
|
const COP_stop = 0;
|
|
const COP_waitforever = 1;
|
|
const COP_read1 = 2;
|
|
const COP_read2 = 3;
|
|
const COP_bltwait = 4;
|
|
const COP_wait_in2 = 5;
|
|
const COP_skip_in2 = 6;
|
|
const COP_wait1 = 7;
|
|
const COP_wait = 8;
|
|
const COP_skip1 = 9;
|
|
const COP_strobe_delay1 = 10;
|
|
const COP_strobe_delay2 = 11;
|
|
const COP_strobe_delay1x = 12;
|
|
const COP_strobe_delay2x = 13;
|
|
const COP_strobe_extra = 14;
|
|
const COP_start_delay = 15;
|
|
|
|
function Copper() {
|
|
const customdelay = [
|
|
1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,1,1,1,1,0,0,0,0,0,0,0,0, /* 32 0x00 - 0x3e */
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x40 - 0x5e */
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x60 - 0x7e */
|
|
0,0,0,0,1,1,1,1,1,1,1,1,0,0,0,0, /* 0x80 - 0x9e */
|
|
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 32 0xa0 - 0xde */
|
|
/* BPLxPTH/BPLxPTL */
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 16 */
|
|
/* BPLCON0-3,BPLMOD1-2 */
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 16 */
|
|
/* SPRxPTH/SPRxPTL */
|
|
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 16 */
|
|
/* SPRxPOS/SPRxCTL/SPRxDATA/SPRxDATB */
|
|
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
|
|
/* COLORxx */
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
/* RESERVED */
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
|
|
];
|
|
this.cop1lc = 0;
|
|
this.cop2lc = 0;
|
|
this.copcon = 0;
|
|
this.enabled_thisline = false;
|
|
this.access = false;
|
|
this.last_copper_hpos = 0;
|
|
|
|
var cop_state = {
|
|
/* The current instruction words. */
|
|
i1:0, i2:0,
|
|
saved_i1:0, saved_i2:0,
|
|
state:0, state_prev:0,
|
|
/* Instruction pointer. */
|
|
ip:0, saved_ip:0,
|
|
hpos:0, vpos:0,
|
|
ignore_next:0,
|
|
vcmp:0, hcmp:0,
|
|
|
|
strobe:0, /* COPJMP1 / COPJMP2 accessed */
|
|
last_write:0, last_write_hpos:0,
|
|
moveaddr:0, movedata:0, movedelay:0
|
|
};
|
|
|
|
this.reset = function () {
|
|
this.copcon = 0;
|
|
cop_state.state = COP_stop;
|
|
};
|
|
|
|
this.reset2 = function () {
|
|
cop_state.hpos = 0;
|
|
cop_state.last_write = 0;
|
|
this.compute_spcflag_copper(AMIGA.playfield.maxhpos);
|
|
};
|
|
|
|
this.COPCON = function (v) {
|
|
this.copcon = v;
|
|
};
|
|
this.COP1LCH = function (v) {
|
|
this.cop1lc = ((v << 16) | (this.cop1lc & 0xffff)) >>> 0;
|
|
};
|
|
this.COP1LCL = function (v) {
|
|
this.cop1lc = ((this.cop1lc & 0xffff0000) | (v & 0xfffe)) >>> 0;
|
|
};
|
|
this.COP2LCH = function (v) {
|
|
this.cop2lc = ((v << 16) | (this.cop2lc & 0xffff)) >>> 0;
|
|
};
|
|
this.COP2LCL = function (v) {
|
|
this.cop2lc = ((this.cop2lc & 0xffff0000) | (v & 0xfffe)) >>> 0;
|
|
};
|
|
|
|
this.COPJMP = function (num, vblank) {
|
|
var oldstrobe = cop_state.strobe;
|
|
|
|
//if (AMIGA.dmaen(DMAF_COPEN) && (cop_state.saved_i1 != 0xffff || cop_state.saved_i2 != 0xfffe))
|
|
//BUG.info('COPJMP(%d) vblank without copper ending %08x (%08x %08x) (%08x %08x)', num, cop_state.ip, this.cop1lc, this.cop2lc, cop_state.saved_i1, cop_state.saved_i2);
|
|
|
|
clr_special(SPCFLAG_COPPER);
|
|
cop_state.ignore_next = 0;
|
|
if (!oldstrobe)
|
|
cop_state.state_prev = cop_state.state;
|
|
|
|
if ((cop_state.state == COP_wait || cop_state.state == COP_waitforever) && !vblank)
|
|
cop_state.state = COP_strobe_delay1x;
|
|
else
|
|
cop_state.state = vblank ? COP_start_delay : (this.access ? COP_strobe_delay1 : COP_strobe_extra);
|
|
|
|
//BUG.info('COPJMP(%d) %d', num, cop_state.state);
|
|
|
|
cop_state.vpos = AMIGA.playfield.vpos;
|
|
cop_state.hpos = AMIGA.playfield.hpos() & ~1;
|
|
cop_state.strobe = num;
|
|
this.enabled_thisline = false;
|
|
|
|
if (0) {
|
|
this.immediate_copper(num);
|
|
return;
|
|
}
|
|
|
|
if (AMIGA.dmaen(DMAF_COPEN))
|
|
this.compute_spcflag_copper(AMIGA.playfield.hpos());
|
|
else if (oldstrobe > 0 && oldstrobe != num && cop_state.state_prev == COP_wait) {
|
|
/* dma disabled, copper idle and accessed both COPxJMPs -> copper stops! */
|
|
cop_state.state = COP_stop;
|
|
//BUG.info('COPJMP(%d) COP_stop');
|
|
}
|
|
};
|
|
|
|
/*function get_copper_address(copno) {
|
|
switch (copno) {
|
|
case 1: return this.cop1lc;
|
|
case 2: return this.cop2lc;
|
|
case -1: return cop_state.ip;
|
|
default: return 0;
|
|
}
|
|
}*/
|
|
|
|
this.test_copper_dangerous = function (address) {
|
|
var addr = address & 0x1fe;
|
|
if (addr < ((this.copcon & 2) ? ((AMIGA.config.chipset.mask & CSMASK_ECS_AGNUS) ? 0 : 0x40) : 0x80)) {
|
|
cop_state.state = COP_stop;
|
|
this.enabled_thisline = false;
|
|
clr_special(SPCFLAG_COPPER);
|
|
return true;
|
|
}
|
|
return false;
|
|
};
|
|
|
|
this.immediate_copper = function (num) {
|
|
var pos = 0;
|
|
var oldpos = 0;
|
|
|
|
cop_state.state = COP_stop;
|
|
cop_state.vpos = AMIGA.playfield.vpos;
|
|
cop_state.hpos = AMIGA.playfield.hpos() & ~1;
|
|
cop_state.ip = num == 1 ? this.cop1lc : this.cop2lc;
|
|
|
|
while (pos < (AMIGA.playfield.maxvpos << 5)) {
|
|
if (oldpos > pos)
|
|
pos = oldpos;
|
|
if (!AMIGA.dmaen(DMAF_COPEN))
|
|
break;
|
|
if (cop_state.ip >= AMIGA.mem.chip.size)
|
|
break;
|
|
pos++;
|
|
oldpos = pos;
|
|
//cop_state.i1 = AMIGA.mem.load16_chip(cop_state.ip);
|
|
//cop_state.i2 = AMIGA.mem.load16_chip(cop_state.ip + 2);
|
|
cop_state.i1 = AMIGA.mem.chip.data[cop_state.ip >>> 1];
|
|
cop_state.i2 = AMIGA.mem.chip.data[(cop_state.ip + 2) >>> 1];
|
|
AMIGA.custom.last_value = cop_state.i2;
|
|
cop_state.ip += 4;
|
|
if (!(cop_state.i1 & 1)) { // move
|
|
cop_state.i1 &= 0x1fe;
|
|
if (cop_state.i1 == 0x88) {
|
|
cop_state.ip = this.cop1lc;
|
|
continue;
|
|
}
|
|
if (cop_state.i1 == 0x8a) {
|
|
cop_state.ip = this.cop2lc;
|
|
continue;
|
|
}
|
|
if (this.test_copper_dangerous(cop_state.i1))
|
|
break;
|
|
AMIGA.custom.store16_real(0, cop_state.i1, cop_state.i2, 0);
|
|
} else { // wait or skip
|
|
if ((cop_state.i1 >> 8) > ((pos >> 5) & 0xff))
|
|
pos = (((pos >> 5) & 0x100) | ((cop_state.i1 >> 8)) << 5) | ((cop_state.i1 & 0xff) >> 3);
|
|
if (cop_state.i1 >= 0xffdf && cop_state.i2 == 0xfffe)
|
|
break;
|
|
}
|
|
}
|
|
cop_state.state = COP_stop;
|
|
clr_special(SPCFLAG_COPPER);
|
|
};
|
|
|
|
this.copper_cant_read = function (hpos, alloc) {
|
|
//BUG.info('copper_cant_read2() hpos %d / %d', hpos, AMIGA.playfield.maxhpos);
|
|
if (hpos + 1 >= AMIGA.playfield.maxhpos) // first refresh slot
|
|
return 1;
|
|
if ((hpos == AMIGA.playfield.maxhpos - 3) && (AMIGA.playfield.maxhpos & 1) && alloc >= 0) {
|
|
return -1;
|
|
}
|
|
return AMIGA.playfield.is_bitplane_dma(hpos);
|
|
};
|
|
|
|
this.custom_store16_copper = function (hpos, addr, value, noget) {
|
|
//if (addr == 0x88 || addr == 0x8a)
|
|
//BUG.info('custom_store16_copper() addr %08x, value %04x | vpos %d hpos %d %d cvcmp %d chcmp %d chpos %d cvpos %d', addr, value, AMIGA.playfield.vpos, AMIGA.playfield.hpos(), hpos, cop_state.vcmp, cop_state.hcmp, cop_state.hpos, cop_state.vpos);
|
|
//value = debug_wputpeekdma (0xdff000 + addr, value);
|
|
this.access = true;
|
|
var v = AMIGA.custom.store16_real(hpos, addr, value, noget);
|
|
this.access = false;
|
|
return v;
|
|
};
|
|
|
|
this.dump_copper = function (error, until_hpos) {
|
|
BUG.info('\n');
|
|
BUG.info('%s: vpos=%d until_hpos=%d vp=%d', error, AMIGA.playfield.vpos, until_hpos, AMIGA.playfield.vpos & (((cop_state.saved_i2 >> 8) & 0x7f) | 0x80));
|
|
BUG.info('cvcmp=%d chcmp=%d chpos=%d cvpos=%d ci1=%04X ci2=%04X', cop_state.vcmp, cop_state.hcmp, cop_state.hpos, cop_state.vpos, cop_state.saved_i1, cop_state.saved_i2);
|
|
BUG.info('cstate=%d ip=%x SPCFLAGS=%x iscline=%d', cop_state.state, cop_state.ip, AMIGA.spcflags, this.enabled_thisline ? 1 : 0);
|
|
BUG.info('\n');
|
|
};
|
|
|
|
this.update = function (until_hpos) {
|
|
var vp = AMIGA.playfield.vpos & (((cop_state.saved_i2 >> 8) & 0x7f) | 0x80);
|
|
var c_hpos = cop_state.hpos;
|
|
|
|
//BUG.info('update() until_hpos %d, vp %d', until_hpos, vp);
|
|
|
|
if (cop_state.state == COP_wait && vp < cop_state.vcmp) {
|
|
this.dump_copper('error2', until_hpos);
|
|
this.enabled_thisline = false;
|
|
cop_state.state = COP_stop;
|
|
clr_special(SPCFLAG_COPPER);
|
|
return;
|
|
}
|
|
|
|
if (until_hpos <= this.last_copper_hpos)
|
|
return;
|
|
|
|
if (until_hpos > (AMIGA.playfield.maxhpos & ~1))
|
|
until_hpos = AMIGA.playfield.maxhpos & ~1;
|
|
|
|
for (; ;) {
|
|
var old_hpos = c_hpos;
|
|
var hp;
|
|
|
|
if (c_hpos >= until_hpos)
|
|
break;
|
|
|
|
/* So we know about the fetch state. */
|
|
AMIGA.playfield.decide_line(c_hpos);
|
|
AMIGA.playfield.decide_fetch(c_hpos);
|
|
|
|
if (cop_state.movedelay > 0) {
|
|
cop_state.movedelay--;
|
|
if (cop_state.movedelay == 0) {
|
|
this.custom_store16_copper(c_hpos, cop_state.moveaddr, cop_state.movedata, 0);
|
|
}
|
|
}
|
|
|
|
if ((c_hpos == AMIGA.playfield.maxhpos - 3) && (AMIGA.playfield.maxhpos & 1))
|
|
c_hpos += 1;
|
|
else
|
|
c_hpos += 2;
|
|
|
|
switch (cop_state.state) {
|
|
case COP_wait_in2:
|
|
{
|
|
if (this.copper_cant_read(old_hpos, 0))
|
|
continue;
|
|
cop_state.state = COP_wait1;
|
|
break;
|
|
}
|
|
case COP_skip_in2:
|
|
{
|
|
if (this.copper_cant_read(old_hpos, 0))
|
|
continue;
|
|
cop_state.state = COP_skip1;
|
|
break;
|
|
}
|
|
case COP_strobe_extra:
|
|
{
|
|
// Wait 1 copper cycle doing nothing
|
|
cop_state.state = COP_strobe_delay1;
|
|
break;
|
|
}
|
|
case COP_strobe_delay1:
|
|
{
|
|
// First cycle after COPJMP is just like normal first read cycle
|
|
// Cycle is used and needs to be free.
|
|
if (this.copper_cant_read(old_hpos, 1))
|
|
continue;
|
|
cop_state.state = COP_strobe_delay2;
|
|
cop_state.ip += 2;
|
|
break;
|
|
}
|
|
case COP_strobe_delay2:
|
|
{
|
|
// Second cycle after COPJMP. This is the strange one.
|
|
// This cycle does not need to be free
|
|
// But it still gets allocated by copper if it is free = CPU and blitter can't use it.
|
|
cop_state.state = COP_read1;
|
|
// Next cycle finally reads from new pointer
|
|
if (cop_state.strobe == 1)
|
|
cop_state.ip = this.cop1lc;
|
|
else
|
|
cop_state.ip = this.cop2lc;
|
|
cop_state.strobe = 0;
|
|
break;
|
|
}
|
|
case COP_strobe_delay1x:
|
|
{
|
|
// First cycle after COPJMP and Copper was waiting. This is the buggy one.
|
|
// Cycle can be free and copper won't allocate it.
|
|
// If Blitter uses this cycle = Copper's address gets copied blitter DMA pointer..
|
|
cop_state.state = COP_strobe_delay2x;
|
|
break;
|
|
}
|
|
case COP_strobe_delay2x:
|
|
{
|
|
// Second cycle fetches following word and tosses it away. Must be free cycle
|
|
// but is not allocated, blitter or cpu can still use it.
|
|
if (this.copper_cant_read(old_hpos, 1))
|
|
continue;
|
|
cop_state.state = COP_read1;
|
|
// Next cycle finally reads from new pointer
|
|
if (cop_state.strobe == 1)
|
|
cop_state.ip = this.cop1lc;
|
|
else
|
|
cop_state.ip = this.cop2lc;
|
|
cop_state.strobe = 0;
|
|
break;
|
|
}
|
|
case COP_start_delay:
|
|
{
|
|
if (this.copper_cant_read(old_hpos, 1))
|
|
continue;
|
|
cop_state.state = COP_read1;
|
|
cop_state.ip = this.cop1lc;
|
|
break;
|
|
}
|
|
case COP_read1:
|
|
{
|
|
if (this.copper_cant_read(old_hpos, 1))
|
|
continue;
|
|
/* workaround for a bug in kick 1.x */
|
|
if (cop_state.ip == 0x00000004 || cop_state.ip == 0x00000676 || cop_state.ip == 0x00c00276) {
|
|
//BUG.info('COP_read1() invalid addr $%08x', cop_state.ip);
|
|
cop_state.state = COP_stop;
|
|
this.enabled_thisline = false;
|
|
clr_special(SPCFLAG_COPPER);
|
|
return;
|
|
}
|
|
//cop_state.i1 = AMIGA.mem.load16_chip(cop_state.ip);
|
|
cop_state.i1 = AMIGA.custom.last_value = AMIGA.mem.chip.data[cop_state.ip >>> 1];
|
|
cop_state.ip += 2;
|
|
cop_state.state = COP_read2;
|
|
break;
|
|
}
|
|
case COP_read2:
|
|
{
|
|
if (this.copper_cant_read(old_hpos, 1))
|
|
continue;
|
|
//cop_state.i2 = AMIGA.mem.load16_chip(cop_state.ip);
|
|
cop_state.i2 = AMIGA.custom.last_value = AMIGA.mem.chip.data[cop_state.ip >>> 1];
|
|
cop_state.ip += 2;
|
|
cop_state.saved_i1 = cop_state.i1;
|
|
cop_state.saved_i2 = cop_state.i2;
|
|
cop_state.saved_ip = cop_state.ip;
|
|
|
|
if (cop_state.i1 & 1) { // WAIT or SKIP
|
|
cop_state.ignore_next = 0;
|
|
if (cop_state.i2 & 1)
|
|
cop_state.state = COP_skip_in2;
|
|
else
|
|
cop_state.state = COP_wait_in2;
|
|
} else { // MOVE
|
|
//uaecptr debugip = cop_state.ip;
|
|
var reg = cop_state.i1 & 0x1fe;
|
|
var data = cop_state.i2;
|
|
cop_state.state = COP_read1;
|
|
this.test_copper_dangerous(reg);
|
|
if (!this.enabled_thisline) {
|
|
//goto out; // was 'dangerous' register -> copper stopped
|
|
cop_state.hpos = c_hpos;
|
|
this.last_copper_hpos = until_hpos;
|
|
return;
|
|
}
|
|
if (cop_state.ignore_next)
|
|
reg = 0x1fe;
|
|
|
|
cop_state.last_write = reg;
|
|
cop_state.last_write_hpos = old_hpos;
|
|
if (reg == 0x88) {
|
|
cop_state.strobe = 1;
|
|
cop_state.state = COP_strobe_delay1;
|
|
} else if (reg == 0x8a) {
|
|
cop_state.strobe = 2;
|
|
cop_state.state = COP_strobe_delay1;
|
|
} else {
|
|
/*if (0) {
|
|
AMIGA.events.newevent2(1, (reg << 16) | data, function(v) { //copper_write);
|
|
AMIGA.copper.custom_store16_copper(AMIGA.playfield.hpos(), v >>> 16, v & 0xffff, 0);
|
|
});
|
|
//this.custom_store16_copper(old_hpos, reg, data, 0);
|
|
} else*/
|
|
{
|
|
// FIX: all copper writes happen 1 cycle later than CPU writes
|
|
if (customdelay[reg >> 1]) {
|
|
cop_state.moveaddr = reg;
|
|
cop_state.movedata = data;
|
|
cop_state.movedelay = customdelay[cop_state.moveaddr >> 1];
|
|
} else {
|
|
var hpos2 = old_hpos;
|
|
this.custom_store16_copper(hpos2, reg, data, 0);
|
|
hpos2++;
|
|
if (reg >= 0x140 && reg < 0x180 && hpos2 >= SPR0_HPOS && hpos2 < SPR0_HPOS + 4 * MAX_SPRITES)
|
|
AMIGA.playfield.do_sprites(hpos2);
|
|
}
|
|
}
|
|
}
|
|
cop_state.ignore_next = 0;
|
|
}
|
|
break;
|
|
}
|
|
case COP_wait1:
|
|
{
|
|
/*#if 0
|
|
if (c_hpos >= (AMIGA.playfield.maxhpos & ~1) || (c_hpos & 1)) break;
|
|
#endif*/
|
|
cop_state.state = COP_wait;
|
|
|
|
cop_state.vcmp = (cop_state.saved_i1 & (cop_state.saved_i2 | 0x8000)) >> 8;
|
|
cop_state.hcmp = (cop_state.saved_i1 & cop_state.saved_i2 & 0xfe);
|
|
|
|
vp = AMIGA.playfield.vpos & (((cop_state.saved_i2 >> 8) & 0x7f) | 0x80);
|
|
|
|
if (cop_state.saved_i1 == 0xffff && cop_state.saved_i2 == 0xfffe) {
|
|
cop_state.state = COP_waitforever;
|
|
this.enabled_thisline = false;
|
|
clr_special(SPCFLAG_COPPER);
|
|
//goto out;
|
|
cop_state.hpos = c_hpos;
|
|
this.last_copper_hpos = until_hpos;
|
|
return;
|
|
}
|
|
if (vp < cop_state.vcmp) {
|
|
this.enabled_thisline = false;
|
|
clr_special(SPCFLAG_COPPER);
|
|
//goto out;
|
|
cop_state.hpos = c_hpos;
|
|
this.last_copper_hpos = until_hpos;
|
|
return;
|
|
}
|
|
}
|
|
/* fall through */
|
|
case COP_wait:
|
|
{
|
|
var ch_comp = c_hpos;
|
|
if (ch_comp & 1)
|
|
ch_comp = 0;
|
|
|
|
if (this.copper_cant_read(old_hpos, 0))
|
|
continue;
|
|
|
|
hp = ch_comp & (cop_state.saved_i2 & 0xfe);
|
|
if (vp == cop_state.vcmp && hp < cop_state.hcmp)
|
|
break;
|
|
|
|
/* Now we know that the comparisons were successful. We might still have to wait for the blitter though. */
|
|
if ((cop_state.saved_i2 & 0x8000) == 0) {
|
|
if (AMIGA.blitter.getState() != BLT_done) {
|
|
//We need to wait for the blitter.
|
|
cop_state.state = COP_bltwait;
|
|
this.enabled_thisline = false;
|
|
clr_special(SPCFLAG_COPPER);
|
|
//goto out;
|
|
cop_state.hpos = c_hpos;
|
|
this.last_copper_hpos = until_hpos;
|
|
return;
|
|
}
|
|
}
|
|
cop_state.state = COP_read1;
|
|
break;
|
|
}
|
|
case COP_skip1:
|
|
{
|
|
var vcmp, hcmp, vp1, hp1;
|
|
|
|
if (c_hpos >= (AMIGA.playfield.maxhpos & ~1) || (c_hpos & 1))
|
|
break;
|
|
|
|
if (this.copper_cant_read(old_hpos, 0))
|
|
continue;
|
|
|
|
vcmp = (cop_state.saved_i1 & (cop_state.saved_i2 | 0x8000)) >> 8;
|
|
hcmp = (cop_state.saved_i1 & cop_state.saved_i2 & 0xfe);
|
|
vp1 = AMIGA.playfield.vpos & (((cop_state.saved_i2 >> 8) & 0x7f) | 0x80);
|
|
hp1 = c_hpos & (cop_state.saved_i2 & 0xfe);
|
|
|
|
if ((vp1 > vcmp || (vp1 == vcmp && hp1 >= hcmp)) && ((cop_state.saved_i2 & 0x8000) != 0 || AMIGA.blitter.getState() == BLT_done))
|
|
cop_state.ignore_next = 1;
|
|
|
|
cop_state.state = COP_read1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
//out:
|
|
cop_state.hpos = c_hpos;
|
|
this.last_copper_hpos = until_hpos;
|
|
};
|
|
|
|
this.compute_spcflag_copper = function (hpos) {
|
|
//BUG.info('compute_spcflag_copper() hpos %d', hpos);
|
|
var wasenabled = this.enabled_thisline;
|
|
|
|
this.enabled_thisline = false;
|
|
clr_special(SPCFLAG_COPPER);
|
|
if (!AMIGA.dmaen(DMAF_COPEN) || cop_state.state == COP_stop || cop_state.state == COP_waitforever || cop_state.state == COP_bltwait)
|
|
return;
|
|
|
|
if (cop_state.state == COP_wait) {
|
|
var vp = AMIGA.playfield.vpos & (((cop_state.saved_i2 >> 8) & 0x7f) | 0x80);
|
|
|
|
if (vp < cop_state.vcmp)
|
|
return;
|
|
}
|
|
// do not use past cycles if starting for the first time in this line
|
|
// (write to DMACON for example) hpos+1 for long lines
|
|
if (!wasenabled && cop_state.hpos < hpos && hpos < AMIGA.playfield.maxhpos) {
|
|
hpos = (hpos + 2) & ~1;
|
|
if (hpos > AMIGA.playfield.maxhpos_short)
|
|
hpos = AMIGA.playfield.maxhpos_short;
|
|
cop_state.hpos = hpos;
|
|
//BUG.info('compute_spcflag_copper() hpos %d %d', hpos, AMIGA.playfield.maxhpos_short);
|
|
}
|
|
|
|
// if COPJMPx was written while DMA was disabled, advance to next state,
|
|
// COP_strobe_extra is single cycle only and does not need free bus.
|
|
// (copper state emulation does not run if DMA is disabled)
|
|
if (!wasenabled && cop_state.state == COP_strobe_extra)
|
|
cop_state.state = COP_strobe_delay1;
|
|
|
|
this.enabled_thisline = true;
|
|
set_special(SPCFLAG_COPPER);
|
|
};
|
|
|
|
this.blitter_done_notify = function (hpos) {
|
|
if (cop_state.state != COP_bltwait)
|
|
return;
|
|
|
|
//BUG.info('blitter_done_notify() hpos %d', hpos);
|
|
|
|
var vp = AMIGA.playfield.vpos;
|
|
hpos += 3;
|
|
hpos &= ~1;
|
|
if (hpos >= AMIGA.playfield.maxhpos) {
|
|
hpos -= AMIGA.playfield.maxhpos;
|
|
vp++;
|
|
}
|
|
cop_state.hpos = hpos;
|
|
cop_state.vpos = vp;
|
|
cop_state.state = COP_read1;
|
|
|
|
if (AMIGA.dmaen(DMAF_COPEN) && vp == AMIGA.playfield.vpos) {
|
|
this.enabled_thisline = true;
|
|
set_special(SPCFLAG_COPPER);
|
|
}
|
|
};
|
|
|
|
this.cycle = function () {
|
|
this.update(AMIGA.playfield.hpos());
|
|
};
|
|
|
|
this.sync_copper_with_cpu = function (hpos, do_schedule) {
|
|
/* Need to let the copper advance to the current position. */
|
|
if (this.enabled_thisline)
|
|
this.update(hpos);
|
|
};
|
|
|
|
/*this.check = function (n) {
|
|
if (cop_state.state == COP_wait) {
|
|
var vp = AMIGA.playfield.vpos & (((cop_state.saved_i2 >> 8) & 0x7f) | 0x80);
|
|
if (vp < cop_state.vcmp) {
|
|
if (this.enabled_thisline)
|
|
BUG.info('COPPER BUG %d: vp=%d vpos=%d vcmp=%d thisline=%d', n, vp, AMIGA.playfield.vpos, cop_state.vcmp, this.enabled_thisline?1:0);
|
|
}
|
|
}
|
|
}*/
|
|
}
|