static void DrvFMIRQHandler(int, int nStatus)
{
if (nStatus) {
M6809SetIRQ(M6809_FIRQ_LINE, M6809_IRQSTATUS_ACK);
} else {
M6809SetIRQ(M6809_FIRQ_LINE, M6809_IRQSTATUS_NONE);
}
}
void RenegadeWriteByte(unsigned short Address, unsigned char Data)
{
switch (Address) {
case 0x3800: {
DrvScrollX[0] = Data;
return;
}
case 0x3801: {
DrvScrollX[1] = Data;
return;
}
case 0x3802: {
DrvSoundLatch = Data;
M6809Open(0);
M6809SetIRQ(M6809_IRQ_LINE, M6809_IRQSTATUS_AUTO);
M6809Close();
return;
}
case 0x3803: {
// flipscreen
return;
}
case 0x3804: {
mcu_w(Data);
return;
}
case 0x3805: {
DrvRomBank = Data & 1;
m6502MapMemory(DrvM6502Rom + 0x8000 + (DrvRomBank * 0x4000), 0x4000, 0x7fff, M6502_ROM);
return;
}
case 0x3806: {
// nop
return;
}
case 0x3807: {
// coin counter
return;
}
default: {
bprintf(PRINT_NORMAL, _T("M6502 Write Byte %04X, %02X\n"), Address, Data);
}
}
}
static int DrvFrame()
{
if (DrvReset) {
DrvDoReset();
}
ZetNewFrame();
{
memset (DrvInputs, 0xff, 3);
for (int i = 0; i < 8; i++) {
DrvInputs[0] ^= (DrvJoy1[i] & 1) << i;
DrvInputs[1] ^= (DrvJoy2[i] & 1) << i;
DrvInputs[2] ^= (DrvJoy3[i] & 1) << i;
}
// Clear opposites
if ((DrvInputs[1] & 0x03) == 0) DrvInputs[1] |= 0x03;
if ((DrvInputs[1] & 0x0c) == 0) DrvInputs[1] |= 0x0c;
if ((DrvInputs[2] & 0x03) == 0) DrvInputs[1] |= 0x03;
if ((DrvInputs[2] & 0x0c) == 0) DrvInputs[1] |= 0x0c;
}
int nInterleave = 100;
int nSoundBufferPos = 0;
int nCyclesTotal[2] = { 3072000 / 60, 3072000 / 60 };
M6809Open(0);
ZetOpen(0);
for (int i = 0; i < nInterleave; i++) {
M6809Run(nCyclesTotal[0] / nInterleave);
BurnTimerUpdate(i * (nCyclesTotal[1] / nInterleave));
if (pBurnSoundOut) {
int nSegmentLength = nBurnSoundLen - nSoundBufferPos;
short* pSoundBuf = pBurnSoundOut + (nSoundBufferPos << 1);
BurnYM2203Update(pSoundBuf, nSegmentLength);
nSoundBufferPos += nSegmentLength;
}
}
BurnTimerEndFrame(nCyclesTotal[1]);
if (*irq_enable) M6809SetIRQ(0, M6809_IRQSTATUS_AUTO);
if (pBurnSoundOut) {
int nSegmentLength = nBurnSoundLen - nSoundBufferPos;
short* pSoundBuf = pBurnSoundOut + (nSoundBufferPos << 1);
if (nSegmentLength) {
BurnYM2203Update(pSoundBuf, nSegmentLength);
}
}
ZetClose();
M6809Close();
if (pBurnDraw) {
DrvDraw();
}
return 0;
}
