// V-Int Callback
void _vint_callback()
{
u16 vintp;
intTrace |= IN_VINT;
vtimer++;
// call user callback (pre V-Int)
if (VIntCBPre) VIntCBPre();
vintp = VIntProcess;
// may worth it
if (vintp)
{
// xgm processing (have to be done first !)
if (vintp & PROCESS_XGM_TASK)
XGM_doVBlankProcess();
// dma processing
if (vintp & PROCESS_DMA_TASK)
{
// DMA protection for XGM driver
if (currentZ80Driver == Z80_DRIVER_XGM)
{
SND_set68KBUSProtection_XGM(TRUE);
// delay enabled ? --> wait a bit to improve PCM playback (test on SOR2)
if (SND_getForceDelayDMA_XGM()) waitSubTick(10);
DMA_flushQueue();
SND_set68KBUSProtection_XGM(FALSE);
}
else
DMA_flushQueue();
// always clear process
vintp &= ~PROCESS_DMA_TASK;
}
// tile cache processing
if (vintp & PROCESS_TILECACHE_TASK)
TC_doVBlankProcess();
// bitmap processing
if (vintp & PROCESS_BITMAP_TASK)
BMP_doVBlankProcess();
// palette fading processing
if (vintp & PROCESS_PALETTE_FADING)
{
if (!VDP_doStepFading(FALSE)) vintp &= ~PROCESS_PALETTE_FADING;
}
VIntProcess = vintp;
}
// then call user callback
if (VIntCB) VIntCB();
// joy state refresh (better to do it after user's callback as it can eat some time)
JOY_update();
intTrace &= ~IN_VINT;
}
static void vintEvent()
{
u16 i;
u16 in, out;
char strNum[8];
char str[40];
// set BUS protection for XGM driver
if (driver->id == Z80_DRIVER_XGM)
SND_set68KBUSProtection_XGM(TRUE);
in = GET_VCOUNTER;
if ((in >= 224) && (in <= 230))
{
switch(dmaMethod)
{
case 1:
VDP_doDMAEx(VDP_DMA_VRAM, 0, 0x8000, (6 * 1024) / 2, 2);
break;
case 2:
for(i = 0; i < 4; i++)
{
VDP_doDMAEx(VDP_DMA_VRAM, 0, 0x8000, 1024 / 2, 2);
waitSubTick(0);
}
break;
case 3:
for(i = 0; i < 8; i++)
{
VDP_doDMAEx(VDP_DMA_VRAM, 0, 0x8000, 256 / 2, 2);
waitSubTick(0);
}
break;
}
}
out = GET_VCOUNTER;
if (driver->id == Z80_DRIVER_XGM)
{
u16 load;
// remove BUS protection for XGM driver
SND_set68KBUSProtection_XGM(FALSE);
// get Z80 cpu estimated load
load = SND_getCPULoad_XGM();
uintToStr(load, str, 3);
strcat(str, " %");
VDP_clearText(16, 21, 10);
VDP_drawText(str, 16, 21);
// {
// u8 debugValues[12];
//
// getZ80Debug(debugValues);
//
// strcpy(str, "4 PCM mixing: ");
//
// uintToStr(debugValues[0], strNum, 3);
// strcat(str, strNum);
// strcat(str, " ");
// uintToStr(debugValues[4], strNum, 3);
// strcat(str, strNum);
//
// VDP_drawText(str, 1, 22);
//
// strcpy(str, "XGM prep & parse: ");
//
// uintToStr(debugValues[5], strNum, 3);
// strcat(str, strNum);
// strcat(str, " ");
// uintToStr(debugValues[6], strNum, 3);
// strcat(str, strNum);
// strcat(str, " ");
// uintToStr(debugValues[7], strNum, 3);
// strcat(str, strNum);
//
// VDP_drawText(str, 1, 23);
//
// strcpy(str, "Ext com & sync: ");
//
// strcat(str, strNum);
// strcat(str, " ");
// uintToStr(debugValues[8], strNum, 3);
// strcat(str, strNum);
// strcat(str, " ");
// uintToStr(debugValues[9], strNum, 3);
// strcat(str, strNum);
//
// VDP_drawText(str, 1, 24);
// }
}
else
{
VDP_clearTextLine(22);
VDP_clearTextLine(23);
VDP_clearTextLine(24);
}
if ((in >= 224) && (in <= 230))
{
switch(dmaMethod)
{
case 0:
VDP_drawText("NONE ", 13, 26);
break;
case 1:
VDP_drawText("1 x 6KB ", 13, 26);
break;
case 2:
VDP_drawText("4 x 1KB ", 13, 26);
break;
case 3:
VDP_drawText("8 x 256B", 13, 26);
break;
}
}
else
VDP_drawText("NOT DONE", 13, 26);
if (dmaMethod)
{
strcpy(str, "DMA start at ");
uintToStr(in, strNum, 3);
strcat(str, strNum);
strcat(str, " - end at ");
uintToStr(out, strNum, 3);
strcat(str, strNum);
VDP_drawText(str, 1, 27);
}
else
VDP_clearTextLine(27);
}