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Sonic CD runs on GP2X
git-svn-id: file:///home/notaz/opt/svn/PicoDrive@21 be3aeb3a-fb24-0410-a615-afba39da0efa
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notaz
parent
d1df87866b
commit
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20 changed files with 364 additions and 184 deletions
150
Pico/cd/Memory.c
150
Pico/cd/Memory.c
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@ -1,7 +1,7 @@
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// This is part of Pico Library
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// (c) Copyright 2004 Dave, All rights reserved.
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// (c) Copyright 2006 notaz, All rights reserved.
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// (c) Copyright 2007 notaz, All rights reserved.
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// Free for non-commercial use.
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// For commercial use, separate licencing terms must be obtained.
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@ -474,6 +474,22 @@ u8 PicoReadM68k8(u32 a)
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goto end;
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}
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#if 0
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if (a == 0x200000 && SekPc == 0xff0b66 && Pico.m.frame_count > 1000)
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{
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int i;
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FILE *ff;
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unsigned short *ram = (unsigned short *) Pico.ram;
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// unswap and dump RAM
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for (i = 0; i < 0x10000/2; i++)
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ram[i] = (ram[i]>>8) | (ram[i]<<8);
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ff = fopen("ram.bin", "wb");
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fwrite(ram, 1, 0x10000, ff);
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fclose(ff);
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exit(0);
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}
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#endif
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// word RAM
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if ((a&0xfc0000)==0x200000) {
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dprintf("m68k_wram r8: [%06x] @%06x", a, SekPc);
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@ -764,22 +780,6 @@ void PicoWriteM68k32(u32 a,u32 d)
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if ((a&0xffffc0)==0xa12000)
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rdprintf("m68k_regs w32: [%02x] %08x @%06x", a&0x3f, d, SekPc);
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#if 0
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if ((a&0x3f) == 0x1c && SekPc == 0xffff05ba)
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{
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int i;
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FILE *ff;
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unsigned short *ram = (unsigned short *) Pico.ram;
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// unswap and dump RAM
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for (i = 0; i < 0x10000/2; i++)
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ram[i] = (ram[i]>>8) | (ram[i]<<8);
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ff = fopen("ram.bin", "wb");
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fwrite(ram, 1, 0x10000, ff);
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fclose(ff);
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exit(0);
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}
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#endif
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OtherWrite16(a, (u16)(d>>16));
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OtherWrite16(a+2,(u16)d);
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}
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@ -1196,6 +1196,97 @@ void PicoWriteS68k32(u32 a,u32 d)
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// -----------------------------------------------------------------
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#if defined(EMU_C68K)
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static __inline int PicoMemBaseM68k(u32 pc)
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{
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int membase=0;
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if (pc < 0x20000)
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{
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membase=(int)Pico_mcd->bios; // Program Counter in BIOS
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}
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else if ((pc&0xe00000)==0xe00000)
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{
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membase=(int)Pico.ram-(pc&0xff0000); // Program Counter in Ram
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}
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else if ((pc&0xfc0000)==0x200000 && !(Pico_mcd->s68k_regs[3]&4))
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{
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membase=(int)Pico_mcd->word_ram-0x200000; // Program Counter in Word Ram
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}
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else
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{
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// Error - Program Counter is invalid
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dprintf("m68k: unhandled jump to %06x", pc);
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membase=(int)Pico.rom;
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}
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return membase;
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}
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static u32 PicoCheckPcM68k(u32 pc)
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{
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pc-=PicoCpu.membase; // Get real pc
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pc&=0xfffffe;
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PicoCpu.membase=PicoMemBaseM68k(pc);
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return PicoCpu.membase+pc;
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}
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static __inline int PicoMemBaseS68k(u32 pc)
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{
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int membase;
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membase=(int)Pico_mcd->prg_ram; // Program Counter in Prg RAM
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if (pc >= 0x80000)
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{
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// Error - Program Counter is invalid
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dprintf("s68k: unhandled jump to %06x", pc);
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}
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return membase;
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}
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static u32 PicoCheckPcS68k(u32 pc)
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{
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pc-=PicoCpuS68k.membase; // Get real pc
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pc&=0xfffffe;
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PicoCpuS68k.membase=PicoMemBaseS68k(pc);
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return PicoCpuS68k.membase+pc;
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}
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#endif
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void PicoMemSetupCD()
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{
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dprintf("PicoMemSetupCD()");
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#ifdef EMU_C68K
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// Setup m68k memory callbacks:
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PicoCpu.checkpc=PicoCheckPcM68k;
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PicoCpu.fetch8 =PicoCpu.read8 =PicoReadM68k8;
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PicoCpu.fetch16=PicoCpu.read16=PicoReadM68k16;
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PicoCpu.fetch32=PicoCpu.read32=PicoReadM68k32;
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PicoCpu.write8 =PicoWriteM68k8;
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PicoCpu.write16=PicoWriteM68k16;
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PicoCpu.write32=PicoWriteM68k32;
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// s68k
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PicoCpuS68k.checkpc=PicoCheckPcS68k;
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PicoCpuS68k.fetch8 =PicoCpuS68k.read8 =PicoReadS68k8;
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PicoCpuS68k.fetch16=PicoCpuS68k.read16=PicoReadS68k16;
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PicoCpuS68k.fetch32=PicoCpuS68k.read32=PicoReadS68k32;
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PicoCpuS68k.write8 =PicoWriteS68k8;
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PicoCpuS68k.write16=PicoWriteS68k16;
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PicoCpuS68k.write32=PicoWriteS68k32;
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#endif
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}
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#ifdef EMU_M68K
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unsigned char PicoReadCD8w (unsigned int a) {
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return m68ki_cpu_p == &PicoS68kCPU ? PicoReadS68k8(a) : PicoReadM68k8(a);
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@ -1221,10 +1312,13 @@ unsigned int m68k_read_pcrelative_CD8 (unsigned int a) {
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a&=0xffffff;
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if(m68ki_cpu_p == &PicoS68kCPU) {
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if (a < 0x80000) return *(u8 *)(Pico_mcd->prg_ram+(a^1)); // PRG Ram
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else dprintf("s68k read_pcrel8 @ %06x", a);
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dprintf("s68k_read_pcrelative_CD8: can't handle %06x", a);
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} else {
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if(a<Pico.romsize) return *(u8 *)(Pico.rom+(a^1)); // Rom
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if(a<0x20000) return *(u8 *)(Pico.rom+(a^1)); // Bios
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if((a&0xe00000)==0xe00000) return *(u8 *)(Pico.ram+((a^1)&0xffff)); // Ram
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if(!(Pico_mcd->s68k_regs[3]&4) && (a&0xfc0000)==0x200000)
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return Pico_mcd->word_ram[(a^1)&0x3fffe];
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dprintf("m68k_read_pcrelative_CD8: can't handle %06x", a);
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}
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return 0;//(u8) lastread_d;
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}
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@ -1232,23 +1326,29 @@ unsigned int m68k_read_pcrelative_CD16(unsigned int a) {
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a&=0xffffff;
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if(m68ki_cpu_p == &PicoS68kCPU) {
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if (a < 0x80000) return *(u16 *)(Pico_mcd->prg_ram+(a&~1)); // PRG Ram
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else dprintf("s68k read_pcrel16 @ %06x", a);
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dprintf("s68k_read_pcrelative_CD16: can't handle %06x", a);
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} else {
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if(a<Pico.romsize) return *(u16 *)(Pico.rom+(a&~1)); // Rom
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if(a<0x20000) return *(u16 *)(Pico.rom+(a&~1)); // Bios
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if((a&0xe00000)==0xe00000) return *(u16 *)(Pico.ram+(a&0xfffe)); // Ram
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if(!(Pico_mcd->s68k_regs[3]&4) && (a&0xfc0000)==0x200000)
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return *(u16 *)(Pico_mcd->word_ram+(a&0x3fffe));
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dprintf("m68k_read_pcrelative_CD16: can't handle %06x", a);
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}
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return 0;//(u16) lastread_d;
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return 0;
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}
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unsigned int m68k_read_pcrelative_CD32(unsigned int a) {
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a&=0xffffff;
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if(m68ki_cpu_p == &PicoS68kCPU) {
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if (a < 0x80000) { u16 *pm=(u16 *)(Pico_mcd->prg_ram+(a&~1)); return (pm[0]<<16)|pm[1]; } // PRG Ram
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else dprintf("s68k read_pcrel32 @ %06x", a);
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dprintf("s68k_read_pcrelative_CD32: can't handle %06x", a);
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} else {
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if(a<Pico.romsize) { u16 *pm=(u16 *)(Pico.rom+(a&~1)); return (pm[0]<<16)|pm[1]; }
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if(a<0x20000) { u16 *pm=(u16 *)(Pico.rom+(a&~1)); return (pm[0]<<16)|pm[1]; }
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if((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); return (pm[0]<<16)|pm[1]; } // Ram
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if(!(Pico_mcd->s68k_regs[3]&4) && (a&0xfc0000)==0x200000)
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{ u16 *pm=(u16 *)(Pico_mcd->word_ram+(a&0x3fffe)); return (pm[0]<<16)|pm[1]; }
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dprintf("m68k_read_pcrelative_CD32: can't handle %06x", a);
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}
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return 0; //lastread_d;
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return 0;
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}
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#endif // EMU_M68K
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