// some dumb detection is used, but that should be enough to make things work\r
if ((a>>22) == 1 && Pico.romsize >= 512*1024) {\r
if (*(int *)(Pico.rom+0x123e4) == 0x00550c39 && *(int *)(Pico.rom+0x123e8) == 0x00000040) { // Super Bubble Bobble (Unl) [!]\r
- if (a == 0x400000) { d=0x55<<8; goto end; }\r
- else if (a == 0x400002) { d=0x0f<<8; goto end; }\r
- }\r
- else if (*(int *)(Pico.rom+0x008c4) == 0x66240055 && *(int *)(Pico.rom+0x008c8) == 0x00404df9) { // Smart Mouse (Unl)\r
- if (a == 0x400000) { d=0x55<<8; goto end; }\r
- else if (a == 0x400002) { d=0x0f<<8; goto end; }\r
- else if (a == 0x400004) { d=0xaa<<8; goto end; }\r
- else if (a == 0x400006) { d=0xf0<<8; goto end; }\r
- }\r
- else if (*(int *)(Pico.rom+0x00404) == 0x00a90600 && *(int *)(Pico.rom+0x00408) == 0x6708b013) { // King of Fighters '98, The (Unl) [!]\r
- if (a == 0x480000 || a == 0x4800e0 || a == 0x4824a0 || a == 0x488880) { d=0xaa<<8; goto end; }\r
- else if (a == 0x4a8820) { d=0x0a<<8; goto end; }\r
- // there is also a read @ 0x4F8820 which needs 0, but that is returned in default case\r
- }\r
- else if (*(int *)(Pico.rom+0x01b24) == 0x004013f9 && *(int *)(Pico.rom+0x01b28) == 0x00ff0000) { // Mahjong Lover (Unl) [!]\r
- if (a == 0x400000) { d=0x90<<8; goto end; }\r
- else if (a == 0x401000) { d=0xd3<<8; goto end; } // this one doesn't seem to be needed, the code does 2 comparisons and only then\r
- // checks the result, which is of the above one. Left it just in case.\r
- }\r
- else if (*(int *)(Pico.rom+0x05254) == 0x0c3962d0 && *(int *)(Pico.rom+0x05258) == 0x00400055) { // Elf Wor (Unl)\r
- if (a == 0x400000) { d=0x55<<8; goto end; }\r
- else if (a == 0x400004) { d=0xc9<<8; goto end; } // this check is done if the above one fails\r
- else if (a == 0x400002) { d=0x0f<<8; goto end; }\r
- else if (a == 0x400006) { d=0x18<<8; goto end; } // similar to above\r
- }\r
+ if (a == 0x400000) { d=0x55<<8; goto end; }\r
+ else if (a == 0x400002) { d=0x0f<<8; goto end; }\r
+ }\r
+ else if (*(int *)(Pico.rom+0x008c4) == 0x66240055 && *(int *)(Pico.rom+0x008c8) == 0x00404df9) { // Smart Mouse (Unl)\r
+ if (a == 0x400000) { d=0x55<<8; goto end; }\r
+ else if (a == 0x400002) { d=0x0f<<8; goto end; }\r
+ else if (a == 0x400004) { d=0xaa<<8; goto end; }\r
+ else if (a == 0x400006) { d=0xf0<<8; goto end; }\r
+ }\r
+ else if (*(int *)(Pico.rom+0x00404) == 0x00a90600 && *(int *)(Pico.rom+0x00408) == 0x6708b013) { // King of Fighters '98, The (Unl) [!]\r
+ if (a == 0x480000 || a == 0x4800e0 || a == 0x4824a0 || a == 0x488880) { d=0xaa<<8; goto end; }\r
+ else if (a == 0x4a8820) { d=0x0a<<8; goto end; }\r
+ // there is also a read @ 0x4F8820 which needs 0, but that is returned in default case\r
+ }\r
+ else if (*(int *)(Pico.rom+0x01b24) == 0x004013f9 && *(int *)(Pico.rom+0x01b28) == 0x00ff0000) { // Mahjong Lover (Unl) [!]\r
+ if (a == 0x400000) { d=0x90<<8; goto end; }\r
+ else if (a == 0x401000) { d=0xd3<<8; goto end; } // this one doesn't seem to be needed, the code does 2 comparisons and only then\r
+ // checks the result, which is of the above one. Left it just in case.\r
+ }\r
+ else if (*(int *)(Pico.rom+0x05254) == 0x0c3962d0 && *(int *)(Pico.rom+0x05258) == 0x00400055) { // Elf Wor (Unl)\r
+ if (a == 0x400000) { d=0x55<<8; goto end; }\r
+ else if (a == 0x400004) { d=0xc9<<8; goto end; } // this check is done if the above one fails\r
+ else if (a == 0x400002) { d=0x0f<<8; goto end; }\r
+ else if (a == 0x400006) { d=0x18<<8; goto end; } // similar to above\r
+ }\r
// our default behaviour is to return whatever was last written a 0x400000-0x7fffff range (used by Squirrel King (R) [!])\r
- // Lion King II, The (Unl) [!] writes @ 400000 and wants to get that val @ 400002 and wites another val\r
- // @ 400004 which is expected @ 400006, so we really remember 2 values here\r
+ // Lion King II, The (Unl) [!] writes @ 400000 and wants to get that val @ 400002 and wites another val\r
+ // @ 400004 which is expected @ 400006, so we really remember 2 values here\r
d = Pico.m.prot_bytes[(a>>2)&1]<<8;\r
}\r
else if (a == 0xa13000 && Pico.romsize >= 1024*1024) {\r
if (*(int *)(Pico.rom+0xc8af0) == 0x30133013 && *(int *)(Pico.rom+0xc8af4) == 0x000f0240) { // Rockman X3 (Unl) [!]\r
- d=0x0c; goto end;\r
- }\r
+ d=0x0c; goto end;\r
+ }\r
else if (*(int *)(Pico.rom+0x28888) == 0x07fc0000 && *(int *)(Pico.rom+0x2888c) == 0x4eb94e75) { // Bug's Life, A (Unl) [!]\r
- d=0x28; goto end; // does the check from RAM\r
- }\r
+ d=0x28; goto end; // does the check from RAM\r
+ }\r
else if (*(int *)(Pico.rom+0xc8778) == 0x30133013 && *(int *)(Pico.rom+0xc877c) == 0x000f0240) { // Super Mario Bros. (Unl) [!]\r
- d=0x0c; goto end; // seems to be the same code as in Rockman X3 (Unl) [!]\r
- }\r
+ d=0x0c; goto end; // seems to be the same code as in Rockman X3 (Unl) [!]\r
+ }\r
else if (*(int *)(Pico.rom+0xf20ec) == 0x30143013 && *(int *)(Pico.rom+0xf20f0) == 0x000f0200) { // Super Mario 2 1998 (Unl) [!]\r
- d=0x0a; goto end;\r
- }\r
+ d=0x0a; goto end;\r
+ }\r
}\r
else if (a == 0xa13002) { // Pocket Monsters (Unl)\r
d=0x01; goto end;\r
}\r
else if (a == 0x30fe02) {\r
// Virtua Racing - just for fun\r
- // this seems to be some flag that SVP is ready or something similar\r
+ // this seems to be some flag that SVP is ready or something similar\r
d=1; goto end;\r
}\r
\r
\r
if ((a&0xff0000)==0xa00000) {\r
if ((a&0x4000)==0x0000) { d=z80Read8(a); d|=d<<8; goto end; } // Z80 ram (not byteswaped)\r
- if ((a&0x6000)==0x4000) { if(PicoOpt&1) d=YM2612Read(); else d=Pico.m.rotate++&3; goto end; } // 0x4000-0x5fff, Fudge if disabled\r
- d=0xffff; goto end;\r
+ if ((a&0x6000)==0x4000) { if(PicoOpt&1) d=YM2612Read(); else d=Pico.m.rotate++&3; dprintf("read ym2612: %04x", d); goto end; } // 0x4000-0x5fff, Fudge if disabled\r
+ d=0xffff; goto end;\r
}\r
if ((a&0xffffe0)==0xa10000) { // I/O ports\r
a=(a>>1)&0xf;\r
goto end;\r
}\r
// |=0x80 for Shadow of the Beast & Super Offroad; rotate fakes next fetched instruction for Time Killers\r
- if (a==0xa11100) { d=((Pico.m.z80Run&1)<<8)|0x8000|Pico.m.rotate++; goto end; }\r
+ if (a==0xa11100) {\r
+ extern int z80stopCycle; // TODO: tidy\r
+ d=Pico.m.z80Run&1;\r
+ if (!d) {\r
+ int stop_before = SekCyclesDone() - z80stopCycle;\r
+ if (stop_before > 0 && stop_before <= 16*2) // Gens uses 16 here\r
+ d = 1; // bus not yet available\r
+ }\r
+ d=(d<<8)|0x8000|Pico.m.rotate++;\r
+ dprintf("get_zrun: %04x [%i|%i] @%06x", d, Pico.m.scanline, SekCyclesDone(), SekPc);\r
+ goto end; }\r
\r
#ifndef _ASM_MEMORY_C\r
if ((a&0xe700e0)==0xc00000) { d=PicoVideoRead(a); goto end; }\r
return;\r
}\r
if (a==0xa11100) {\r
- extern int z80startCycle, z80stopCycle;\r
+ extern int z80startCycle, z80stopCycle;\r
//int lineCycles=(488-SekCyclesLeft)&0x1ff;\r
d&=1; d^=1;\r
- if(!d) {\r
- // hack: detect a nasty situation where Z80 was enabled and disabled in the same 68k timeslice (Golden Axe III)\r
- if((PicoOpt&4) && Pico.m.z80Run==1) z80_run(20);\r
- z80stopCycle = SekCyclesDone();\r
- //z80ExtraCycles += (lineCycles>>1)-(lineCycles>>5); // only meaningful in PicoFrameHints()\r
- } else {\r
- z80startCycle = SekCyclesDone();\r
- //if(Pico.m.scanline != -1)\r
- //z80ExtraCycles -= (lineCycles>>1)-(lineCycles>>5)+16;\r
- }\r
- //dprintf("set_zrun: %i [%i|%i] zPC=%04x @%06x", d, Pico.m.scanline, SekCyclesDone(), mz80GetRegisterValue(NULL, 0), SekPc);\r
- Pico.m.z80Run=(u8)d; return;\r
- }\r
- if (a==0xa11200) { if(!(d&1)) z80_reset(); return; }\r
+ if(!d) {\r
+ // hack: detect a nasty situation where Z80 was enabled and disabled in the same 68k timeslice (Golden Axe III)\r
+ // if((PicoOpt&4) && Pico.m.z80Run==1) z80_run(20); // FIXME: movies\r
+ z80stopCycle = SekCyclesDone();\r
+ //z80ExtraCycles += (lineCycles>>1)-(lineCycles>>5); // only meaningful in PicoFrameHints()\r
+ } else {\r
+ z80startCycle = SekCyclesDone();\r
+ //if(Pico.m.scanline != -1)\r
+ //z80ExtraCycles -= (lineCycles>>1)-(lineCycles>>5)+16;\r
+ }\r
+ dprintf("set_zrun: %02x [%i|%i] @%06x", d, Pico.m.scanline, SekCyclesDone(), /*mz80GetRegisterValue(NULL, 0),*/ SekPc);\r
+ Pico.m.z80Run=(u8)d; return;\r
+ }\r
+ if (a==0xa11200) { dprintf("write z80Reset: %02x", d); if(!(d&1)) z80_reset(); return; }\r
\r
if ((a&0xff7f00)==0xa06000) // Z80 BANK register\r
{\r
if(a >= SRam.start && a <= SRam.end) {\r
unsigned int sreg = Pico.m.sram_reg;\r
if(!(sreg & 0x10)) {\r
- // not detected SRAM\r
- if((a&~1)==0x200000) {\r
+ // not detected SRAM\r
+ if((a&~1)==0x200000) {\r
Pico.m.sram_reg|=4; // this should be a game with EEPROM (like NBA Jam)\r
SRam.start=0x200000; SRam.end=SRam.start+1;\r
}\r
- Pico.m.sram_reg|=0x10;\r
- }\r
+ Pico.m.sram_reg|=0x10;\r
+ }\r
if(sreg & 4) { // EEPROM write\r
- if(SekCyclesDoneT()-lastSSRamWrite < 46) {\r
- // just update pending state\r
- SRAMUpdPending(a, d);\r
- } else {\r
- SRAMWriteEEPROM(sreg>>6); // execute pending\r
- SRAMUpdPending(a, d);\r
+ if(SekCyclesDoneT()-lastSSRamWrite < 46) {\r
+ // just update pending state\r
+ SRAMUpdPending(a, d);\r
+ } else {\r
+ SRAMWriteEEPROM(sreg>>6); // execute pending\r
+ SRAMUpdPending(a, d);\r
lastSSRamWrite = SekCyclesDoneT();\r
- }\r
+ }\r
} else if(!(sreg & 2)) {\r
u8 *pm=(u8 *)(SRam.data-SRam.start+a);\r
if(*pm != (u8)d) {\r
SRam.changed = 1;\r
*pm=(u8)d;\r
}\r
- }\r
+ }\r
return;\r
}\r
\r
\r
if(a >= 0xA13004 && a < 0xA13040) {\r
// dumb 12-in-1 or 4-in-1 banking support\r
- int len;\r
- a &= 0x3f; a <<= 16;\r
- len = Pico.romsize - a;\r
- if (len <= 0) return; // invalid/missing bank\r
- if (len > 0x200000) len = 0x200000; // 2 megs\r
- memcpy(Pico.rom, Pico.rom+a, len); // code which does this is in RAM so this is safe.\r
+ int len;\r
+ a &= 0x3f; a <<= 16;\r
+ len = Pico.romsize - a;\r
+ if (len <= 0) return; // invalid/missing bank\r
+ if (len > 0x200000) len = 0x200000; // 2 megs\r
+ memcpy(Pico.rom, Pico.rom+a, len); // code which does this is in RAM so this is safe.\r
return;\r
}\r
\r
return;\r
}\r
if (a==0xa11100) { OtherWrite8(a, d>>8, 16); return; }\r
- if (a==0xa11200) { if(!(d&0x100)) z80_reset(); return; }\r
+ if (a==0xa11200) { dprintf("write z80reset: %04x", d); if(!(d&0x100)) z80_reset(); return; }\r
\r
OtherWrite8(a, d>>8, 16);\r
OtherWrite8(a+1,d&0xff, 16);\r
if(a >= SRam.start && a <= SRam.end) {\r
unsigned int sreg = Pico.m.sram_reg;\r
if(!(sreg & 0x10) && (sreg & 1) && a > 0x200001) { // not yet detected SRAM\r
- Pico.m.sram_reg|=0x10; // should be normal SRAM\r
- }\r
+ Pico.m.sram_reg|=0x10; // should be normal SRAM\r
+ }\r
if(sreg & 4) { // EEPROM read\r
d = SRAMReadEEPROM();\r
goto end;\r
\r
unsigned int m68k_read_memory_8(unsigned int address)\r
{\r
- return (PicoMCD&1) ? PicoReadCD8w(address) : PicoRead8(address);\r
+ return (PicoMCD&1) ? PicoReadCD8w(address) : PicoRead8(address);\r
}\r
\r
unsigned int m68k_read_memory_16(unsigned int address)\r
{\r
- return (PicoMCD&1) ? PicoReadCD16w(address) : PicoRead16(address);\r
+ return (PicoMCD&1) ? PicoReadCD16w(address) : PicoRead16(address);\r
}\r
\r
unsigned int m68k_read_memory_32(unsigned int address)\r
{\r
- return (PicoMCD&1) ? PicoReadCD32w(address) : PicoRead32(address);\r
+ return (PicoMCD&1) ? PicoReadCD32w(address) : PicoRead32(address);\r
}\r
\r
void m68k_write_memory_8(unsigned int address, unsigned int value)\r
{\r
- if (PicoMCD&1) PicoWriteCD8w(address, (u8)value); else PicoWrite8(address, (u8)value);\r
+ if (PicoMCD&1) PicoWriteCD8w(address, (u8)value); else PicoWrite8(address, (u8)value);\r
}\r
\r
void m68k_write_memory_16(unsigned int address, unsigned int value)\r
{\r
- if (PicoMCD&1) PicoWriteCD16w(address,(u16)value); else PicoWrite16(address,(u16)value);\r
+ if (PicoMCD&1) PicoWriteCD16w(address,(u16)value); else PicoWrite16(address,(u16)value);\r
}\r
\r
void m68k_write_memory_32(unsigned int address, unsigned int value)\r
{\r
- if (PicoMCD&1) PicoWriteCD32w(address, value); else PicoWrite32(address, value);\r
+ if (PicoMCD&1) PicoWriteCD32w(address, value); else PicoWrite32(address, value);\r
}\r
#endif\r
#endif // EMU_M68K\r
notaz.gp2x.de / picodrive.git / blobdiff