int stop_before = SekCyclesDone() - z80stopCycle;
//elprintf(EL_BUSREQ, "get_zrun: stop before: %i", stop_before);
// note: if we use 20 or more here, Barkley Shut Up and Jam! will purposedly crash itself.
- // TODO: CD Terminator
+ // but CD Terminator needs at least 32, so it only works because next frame cycle wrap.
if (stop_before > 0 && stop_before < 20) // Gens uses 16 here
d = 1; // bus not yet available
}
void z80WriteBusReq(u32 d)
{
d&=1; d^=1;
- if (Pico.m.scanline != -1)
+ //if (Pico.m.scanline != -1)
{
if(!d) {
// this is for a nasty situation where Z80 was enabled and disabled in the same 68k timeslice (Golden Axe III)
if (Pico.m.z80Run) {
int lineCycles;
z80stopCycle = SekCyclesDone();
- if (Pico.m.z80Run&2)
+ if ((Pico.m.z80Run&2) && Pico.m.scanline != -1)
lineCycles=(488-SekCyclesLeft)&0x1ff;
else lineCycles=z80stopCycle-z80startCycle; // z80 was started at current line
- if (lineCycles > 0 && lineCycles <= 488) {
+ if (lineCycles > 0) { // && lineCycles <= 488) {
//dprintf("zrun: %i/%i cycles", lineCycles, (lineCycles>>1)-(lineCycles>>5));
lineCycles=(lineCycles>>1)-(lineCycles>>5);
z80_run(lineCycles);
#ifndef _ASM_MEMORY_C
if ((a&0xe700f9)==0xc00011||(a&0xff7ff9)==0xa07f11) { if(PicoOpt&2) SN76496Write(d); return; } // PSG Sound
if ((a&0xff4000)==0xa00000) { if(!(Pico.m.z80Run&1)) Pico.zram[a&0x1fff]=(u8)d; return; } // Z80 ram
- if ((a&0xff6000)==0xa04000) { if(PicoOpt&1) emustatus|=YM2612Write(a&3, d); return; } // FM Sound
+ if ((a&0xff6000)==0xa04000) { if(PicoOpt&1) emustatus|=YM2612Write(a&3, d)&1; return; } // FM Sound
if ((a&0xffffe0)==0xa10000) { IoWrite8(a, d); return; } // I/O ports
#endif
if (a==0xa11100) { z80WriteBusReq(d); return; }
if (a==0xa11200) {
- dprintf("write z80Reset: %02x", d);
+ elprintf(EL_BUSREQ, "write z80Reset: %02x", d);
if(!(d&1)) z80_reset();
return;
}
if ((a&0xffffe0)==0xa10000) { IoWrite8(a, d); return; } // I/O ports
if ((a&0xff4000)==0xa00000) { if(!(Pico.m.z80Run&1)) Pico.zram[a&0x1fff]=(u8)(d>>8); return; } // Z80 ram (MSB only)
if ((a&0xe700f8)==0xc00010||(a&0xff7ff8)==0xa07f10) { if(PicoOpt&2) SN76496Write(d); return; } // PSG Sound
- if ((a&0xff6000)==0xa04000) { if(PicoOpt&1) emustatus|=YM2612Write(a&3, d); return; } // FM Sound (??)
+ if ((a&0xff6000)==0xa04000) { if(PicoOpt&1) emustatus|=YM2612Write(a&3, d)&1; return; } // FM Sound (??)
if ((a&0xff7f00)==0xa06000) // Z80 BANK register
{
Pico.m.z80_bank68k>>=1;
#ifndef _CD_MEMORY_C
if (a >= SRam.start && a <= SRam.end) {
+ elprintf(EL_SRAMIO, "sram w16 [%06x] %04x @ %06x", a, d, SekPc);
if ((a&0x16)==0x10) { // detected, not EEPROM, write not disabled
u8 *pm=(u8 *)(SRam.data-SRam.start+a);
*pm++=d>>8;
SRam.changed = 1;
}
else
- SRAMWrite(a, d); // ??
+ SRAMWrite(a, d);
return;
}
#else