RaySollium99/picodrive
1
0
Fork 0
mirror of https://github.com/RaySollium99/picodrive.git synced 2025-10-28 05:48:52 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

new acc mode timing, VDP FIFO code

Browse source 
git-svn-id: file:///home/notaz/opt/svn/PicoDrive@244 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2007-09-11 20:52:21 +00:00
parent 83c093a48a
commit 69996cb7c6
14 changed files with 373 additions and 132 deletions
Download patch file Download diff file Expand all files Collapse all files

11
Pico/Memory.c
View file

@ -81,7 +81,10 @@ static u32 CPU_CALL PicoCheckPc(u32 pc)
// pc&=0xfffffe;
pc&=~1;
if ((pc<<8) == 0)
{
printf("%i:%03i: game crash detected @ %06x\n", Pico.m.frame_count, Pico.m.scanline, SekPc);
return (int)Pico.rom + Pico.romsize; // common crash condition, can happen if acc timing is off
}
PicoCpu.membase=PicoMemBase(pc&0x00ffffff);
PicoCpu.membase-=pc&0xff000000;
@ -697,13 +700,15 @@ PICO_INTERNAL unsigned char z80_read(unsigned short a)
addr68k+=a&0x7fff;
ret = (u8) PicoRead8(addr68k);
//dprintf("z80->68k w8 : %06x, %02x", addr68k, ret);
elprintf(EL_Z80BNK, "z80->68k r8 [%06x] %02x", addr68k, ret);
goto end;
}
// should not be needed || dprintf("z80_read RAM");
if (a<0x4000) { ret = (u8) Pico.zram[a&0x1fff]; goto end; }
elprintf(EL_ANOMALY, "z80 invalid r8 [%06x] %02x", a, ret);
end:
return ret;
}
@ -745,13 +750,15 @@ PICO_INTERNAL_ASM void z80_write(unsigned char data, unsigned short a)
u32 addr68k;
addr68k=Pico.m.z80_bank68k<<15;
addr68k+=a&0x7fff;
elprintf(EL_Z80BNK, "z80->68k w8 [%06x] %02x", addr68k, data);
PicoWrite8(addr68k, data);
//dprintf("z80->68k w8 : %06x, %02x", addr68k, data);
return;
}
// should not be needed, drZ80 knows how to access RAM itself || dprintf("z80_write RAM @ %08x", lr);
if (a<0x4000) { Pico.zram[a&0x1fff]=data; return; }
elprintf(EL_ANOMALY, "z80 invalid w8 [%06x] %02x", a, data);
}
PICO_INTERNAL void z80_write16(unsigned short data, unsigned short a)