static INT32 DrvFrame()
{
if (DrvReset) {
DrvDoReset();
}
{
memset (DrvInputs, 0xff, 2 * sizeof(INT16));
for (INT32 i = 0; i < 16; i++) {
DrvInputs[0] ^= (DrvJoy1[i] & 1) << i;
DrvInputs[1] ^= (DrvJoy2[i] & 1) << i;
}
}
INT32 nInterleave = 256;
INT32 nCyclesTotal[1] = { 12000000 / 60 };
INT32 nCyclesDone[1] = { 0 };
SekOpen(0);
for (INT32 i = 0; i < nInterleave; i++)
{
nCyclesDone[0] += SekRun(nCyclesTotal[0] / nInterleave);
if (control_data & 0x800) {
if (i == 0) SekSetIRQLine(4, CPU_IRQSTATUS_AUTO);
if (i == 240) SekSetIRQLine(3, CPU_IRQSTATUS_AUTO);
}
}
if (pBurnSoundOut) {
YMZ280BRender(pBurnSoundOut, nBurnSoundLen);
}
SekClose();
if (pBurnDraw) {
DrvDraw();
}
return 0;
}
static INT32 DrvFrame()
{
INT32 nCyclesVBlank;
INT32 nInterleave = 8;
if (DrvReset) { // Reset machine
DrvDoReset();
}
// Compile digital inputs
DrvInput[0] = 0; // Player 1
DrvInput[1] = 0; // Player 2
for (INT32 i = 0; i < 16; i++) {
DrvInput[0] |= (DrvJoy1[i] & 1) << i;
DrvInput[1] |= (DrvJoy2[i] & 1) << i;
}
CaveClearOpposites(&DrvInput[0]);
CaveClearOpposites(&DrvInput[1]);
DrvInput[0] ^= 0xffff;
DrvInput[1] ^= 0xffff;
SekNewFrame();
nCyclesTotal[0] = (INT32)((INT64)16000000 * nBurnCPUSpeedAdjust / (0x0100 * CAVE_REFRESHRATE));
nCyclesDone[0] = 0;
nCyclesVBlank = nCyclesTotal[0] - (INT32)((nCyclesTotal[0] * CAVE_VBLANK_LINES) / 271.5);
bVBlank = false;
INT32 nSoundBufferPos = 0;
SekOpen(0);
for (INT32 i = 1; i <= nInterleave; i++) {
INT32 nNext;
// Render sound segment
if ((i & 1) == 0) {
if (pBurnSoundOut) {
INT32 nSegmentEnd = nBurnSoundLen * i / nInterleave;
INT16* pSoundBuf = pBurnSoundOut + (nSoundBufferPos << 1);
YMZ280BRender(pSoundBuf, nSegmentEnd - nSoundBufferPos);
nSoundBufferPos = nSegmentEnd;
}
}
// Run 68000
nCurrentCPU = 0;
nNext = i * nCyclesTotal[nCurrentCPU] / nInterleave;
// See if we need to trigger the VBlank interrupt
if (!bVBlank && nNext > nCyclesVBlank) {
if (nCyclesDone[nCurrentCPU] < nCyclesVBlank) {
nCyclesSegment = nCyclesVBlank - nCyclesDone[nCurrentCPU];
if (!CheckSleep(nCurrentCPU)) { // See if this CPU is busywaiting
nCyclesDone[nCurrentCPU] += SekRun(nCyclesSegment);
} else {
nCyclesDone[nCurrentCPU] += SekIdle(nCyclesSegment);
}
}
if (pBurnDraw != NULL) {
DrvDraw(); // Draw screen if needed
}
bVBlank = true;
nVideoIRQ = 0;
UpdateIRQStatus();
}
nCyclesSegment = nNext - nCyclesDone[nCurrentCPU];
if (!CheckSleep(nCurrentCPU)) { // See if this CPU is busywaiting
nCyclesDone[nCurrentCPU] += SekRun(nCyclesSegment);
} else {
nCyclesDone[nCurrentCPU] += SekIdle(nCyclesSegment);
}
nCurrentCPU = -1;
}
{
// Make sure the buffer is entirely filled.
if (pBurnSoundOut) {
INT32 nSegmentLength = nBurnSoundLen - nSoundBufferPos;
INT16* pSoundBuf = pBurnSoundOut + (nSoundBufferPos << 1);
if (nSegmentLength) {
YMZ280BRender(pSoundBuf, nSegmentLength);
}
}
}
SekClose();
return 0;
}
