static INT32 drvDoReset()
{
// Insert region code into 68K ROM, code by BisonSAS
UINT8 nRegion = drvRegion & 0x1F;
if (nRegion<=25) {
Rom01[0x00000^1]=(UINT8)(nRegion<<13) | (drvRegion & 0x1F);
}
SekOpen(0);
nIRQPending = 0;
SekSetIRQLine(0, SEK_IRQSTATUS_NONE);
Map68KTextROM(true);
SekReset();
SekClose();
ZetOpen(0);
ZetReset();
ZetClose();
MSM6295Reset(0);
MSM6295Reset(1);
BurnYM2151Reset();
return 0;
}
// Scan ram
static INT32 drvScan(INT32 nAction, INT32* pnMin)
{
struct BurnArea ba;
if (pnMin) { // Return minimum compatible version
*pnMin = 0x029496;
}
if (nAction & ACB_VOLATILE) { // Scan volatile ram
memset(&ba, 0, sizeof(ba));
ba.Data = RamStart;
ba.nLen = RamEnd - RamStart;
ba.szName = "RAM";
BurnAcb(&ba);
SekScan(nAction); // Scan 68000
ZetScan(nAction); // Scan Z80
SCAN_VAR(nCurrentBank);
MSM6295Scan(0, nAction);
MSM6295Scan(1, nAction);
BurnYM2151Scan(nAction);
ToaScanGP9001(nAction, pnMin);
SCAN_VAR(nIRQPending);
SCAN_VAR(nTextROMStatus);
SCAN_VAR(drvInput);
if (nAction & ACB_WRITE) {
INT32 n = nTextROMStatus;
nTextROMStatus = -1;
SekOpen(0);
Map68KTextROM(n);
SekClose();
n = nCurrentBank;
nCurrentBank = -1;
ZetOpen(0);
drvZ80Bankswitch(n);
ZetClose();
}
}
return 0;
}
static INT32 drvInit()
{
INT32 nLen;
#ifdef DRIVER_ROTATION
bToaRotateScreen = true;
#endif
nGP9001ROMSize[0] = 0x01000000;
// Find out how much memory is needed
Mem = NULL;
MemIndex();
nLen = MemEnd - (UINT8*)0;
if ((Mem = (UINT8*)BurnMalloc(nLen)) == NULL) {
return 1;
}
memset(Mem, 0, nLen); // Zero memory
MemIndex(); // Index the allocated memory
if (LoadRoms()) {
return 1;
}
{
SekInit(0, 0x68000); // Allocate 68000
SekOpen(0);
// Map 68000 memory:
SekMapMemory(Rom01, 0x000000, 0x1FFFFF, SM_ROM); // CPU 0 ROM
SekMapMemory(Ram02, 0x208000, 0x20FFFF, SM_RAM);
Map68KTextROM(true);
SekSetReadWordHandler(0, batriderReadWord);
SekSetReadByteHandler(0, batriderReadByte);
SekSetWriteWordHandler(0, batriderWriteWord);
SekSetWriteByteHandler(0, batriderWriteByte);
SekMapHandler(1, 0x400000, 0x400400, SM_RAM); // GP9001 addresses
SekSetReadWordHandler(1, batriderReadWordGP9001);
SekSetWriteWordHandler(1, batriderWriteWordGP9001);
SekMapHandler(2, 0x300000, 0x37FFFF, SM_ROM); // Z80 ROM
SekSetReadByteHandler(2, batriderReadByteZ80ROM);
SekSetReadWordHandler(2, batriderReadWordZ80ROM);
SekClose();
}
nSpriteYOffset = 0x0001;
nLayer0XOffset = -0x01D6;
nLayer1XOffset = -0x01D8;
nLayer2XOffset = -0x01DA;
ToaInitGP9001();
nExtraTXOffset = 0x2C;
ToaExtraTextInit();
drvZInit(); // Initialize Z80
BurnYM2151Init(32000000 / 8);
BurnYM2151SetAllRoutes(1.00, BURN_SND_ROUTE_BOTH);
MSM6295Init(0, 32000000 / 10 / 132, 1);
MSM6295Init(1, 32000000 / 10 / 165, 1);
MSM6295SetRoute(0, 1.00, BURN_SND_ROUTE_BOTH);
MSM6295SetRoute(1, 1.00, BURN_SND_ROUTE_BOTH);
nToaPalLen = nColCount;
ToaPalSrc = RamPal;
ToaPalInit();
nTextROMStatus = -1;
bDrawScreen = true;
drvDoReset(); // Reset machine
return 0;
}
void __fastcall batriderWriteWord(UINT32 sekAddress, UINT16 wordValue)
{
switch (sekAddress) {
case 0x500020: {
RamShared[0] = wordValue;
// The 68K program normally writes 0x500020/0x500022 as a single longword,
// except during the communications test.
if (wordValue == 0x55) {
ZetNmi();
nCyclesDone[1] += ZetRun(0x1800);
}
break;
}
case 0x500022:
RamShared[1] = wordValue;
// Sound commands are processed by the Z80 using an NMI
// So, trigger a Z80 NMI and execute it
ZetNmi();
nCyclesDone[1] += ZetRun(0x1800);
break;
case 0x500024:
// Writes to this address only occur in situations where the program sets
// 0x20FA19 (Ram02[0x7A18]) to 0xFF, and then sits in a loop waiting for it to become 0x00
// Interrupt 4 does this (the same code is also conditionally called from interrupt 2)
nIRQPending = 1;
SekSetIRQLine(4, SEK_IRQSTATUS_ACK);
break;
case 0x500060:
// Bit 0 of the value written to this location must be echod at 0x50000C
nData = wordValue;
break;
case 0x500080:
Map68KTextROM(false);
break;
case 0x500082: // Acknowledge interrupt
SekSetIRQLine(0, SEK_IRQSTATUS_NONE);
nIRQPending = 0;
break;
case 0x5000C0:
case 0x5000C1:
case 0x5000C2:
case 0x5000C3:
case 0x5000C4:
case 0x5000C5:
case 0x5000C6:
case 0x5000C7:
case 0x5000C8:
case 0x5000C9:
case 0x5000CA:
case 0x5000CB:
case 0x5000CC:
case 0x5000CD:
case 0x5000CE:
GP9001TileBank[(sekAddress & 0x0F) >> 1] = ((wordValue & 0x0F) << 15);
break;
// default:
// printf("Attempt to write %06X (word) -> %04X.\n", sekAddress, wordValue);
}
}
static int drvInit()
{
int nLen;
#ifdef DRIVER_ROTATION
bToaRotateScreen = true;
#endif
nGP9001ROMSize[0] = 0x01000000;
// Find out how much memory is needed
Mem = NULL;
MemIndex();
nLen = MemEnd - (unsigned char*)0;
if ((Mem = (unsigned char*)malloc(nLen)) == NULL) {
return 1;
}
memset(Mem, 0, nLen); // Zero memory
MemIndex(); // Index the allocated memory
if (LoadRoms()) {
return 1;
}
{
SekInit(0, 0x68000); // Allocate 68000
SekOpen(0);
// Map 68000 memory:
SekMapMemory(Rom01, 0x000000, 0x1FFFFF, SM_ROM); // CPU 0 ROM
SekMapMemory(Ram02, 0x208000, 0x20FFFF, SM_RAM);
Map68KTextROM(true);
SekSetReadWordHandler(0, batriderReadWord);
SekSetReadByteHandler(0, batriderReadByte);
SekSetWriteWordHandler(0, batriderWriteWord);
SekSetWriteByteHandler(0, batriderWriteByte);
SekMapHandler(1, 0x400000, 0x400400, SM_RAM); // GP9001 addresses
SekSetReadWordHandler(1, batriderReadWordGP9001);
SekSetWriteWordHandler(1, batriderWriteWordGP9001);
SekMapHandler(2, 0x300000, 0x37FFFF, SM_ROM); // Z80 ROM
SekSetReadByteHandler(2, batriderReadByteZ80ROM);
SekSetReadWordHandler(2, batriderReadWordZ80ROM);
SekClose();
}
nSpriteYOffset = 0x0001;
nLayer0XOffset = -0x01D6;
nLayer1XOffset = -0x01D8;
nLayer2XOffset = -0x01DA;
ToaInitGP9001();
nExtraTXOffset = 0x2C;
ToaExtraTextInit();
drvZInit(); // Initialize Z80
BurnYM2151Init(32000000 / 8, 50.0);
MSM6295Init(0, 32000000 / 10 / 132, 50.0, 1);
MSM6295Init(1, 32000000 / 10 / 165, 50.0, 1);
nToaPalLen = nColCount;
ToaPalSrc = RamPal;
ToaPalInit();
nTextROMStatus = -1;
bDrawScreen = true;
#if defined FBA_DEBUG && defined USE_SPEEDHACKS
bprintf(PRINT_IMPORTANT, _T(" * Using speed-hacks (detecting idle loops).\n"));
#endif
drvDoReset(); // Reset machine
return 0;
}
