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https://github.com/RaySollium99/picodrive.git
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.cue support, Pico stubs
git-svn-id: file:///home/notaz/opt/svn/PicoDrive@433 be3aeb3a-fb24-0410-a615-afba39da0efa
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notaz
parent
b923ecbe75
commit
9037e45d9f
16 changed files with 530 additions and 161 deletions
119
Pico/Memory.c
119
Pico/Memory.c
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@ -210,6 +210,14 @@ static u32 OtherRead16End(u32 a, int realsize)
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{
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u32 d=0;
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// 32x test
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/*
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if (a == 0xa130ec) { d = 0x4d41; goto end; } // MA
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else if (a == 0xa130ee) { d = 0x5253; goto end; } // RS
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else if (a == 0xa15100) { d = 0x0080; goto end; }
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else
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*/
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// for games with simple protection devices, discovered by Haze
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// some dumb detection is used, but that should be enough to make things work
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if ((a>>22) == 1 && Pico.romsize >= 512*1024) {
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@ -488,7 +496,6 @@ static void PicoWrite32(u32 a,u32 d)
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// -----------------------------------------------------------------
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// TODO: asm code
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static void OtherWrite16End(u32 a,u32 d,int realsize)
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{
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PicoWrite8Hook(a, d>>8, realsize);
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@ -507,6 +514,10 @@ PICO_INTERNAL void PicoMemResetHooks(void)
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PicoWrite16Hook = OtherWrite16End;
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}
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#ifdef EMU_M68K
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static void m68k_mem_setup(void);
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#endif
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PICO_INTERNAL void PicoMemSetup(void)
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{
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// Setup memory callbacks:
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@ -530,7 +541,7 @@ PICO_INTERNAL void PicoMemSetup(void)
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// setup FAME fetchmap
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{
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int i;
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// by default, point everything to fitst 64k of ROM
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// by default, point everything to first 64k of ROM
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for (i = 0; i < M68K_FETCHBANK1; i++)
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PicoCpuFM68k.Fetch[i] = (unsigned int)Pico.rom - (i<<(24-FAMEC_FETCHBITS));
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// now real ROM
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@ -541,15 +552,24 @@ PICO_INTERNAL void PicoMemSetup(void)
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PicoCpuFM68k.Fetch[i] = (unsigned int)Pico.ram - (i<<(24-FAMEC_FETCHBITS));
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}
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#endif
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#ifdef EMU_M68K
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m68k_mem_setup();
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#endif
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}
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/* some nasty things below :( */
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#ifdef EMU_M68K
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unsigned int m68k_read_pcrelative_CD8 (unsigned int a);
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unsigned int m68k_read_pcrelative_CD16(unsigned int a);
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unsigned int m68k_read_pcrelative_CD32(unsigned int a);
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unsigned int (*pm68k_read_memory_8) (unsigned int address) = NULL;
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unsigned int (*pm68k_read_memory_16)(unsigned int address) = NULL;
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unsigned int (*pm68k_read_memory_32)(unsigned int address) = NULL;
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void (*pm68k_write_memory_8) (unsigned int address, unsigned char value) = NULL;
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void (*pm68k_write_memory_16)(unsigned int address, unsigned short value) = NULL;
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void (*pm68k_write_memory_32)(unsigned int address, unsigned int value) = NULL;
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unsigned int (*pm68k_read_memory_pcr_8) (unsigned int address) = NULL;
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unsigned int (*pm68k_read_memory_pcr_16)(unsigned int address) = NULL;
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unsigned int (*pm68k_read_memory_pcr_32)(unsigned int address) = NULL;
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// these are allowed to access RAM
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// these are here for core debugging mode
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static unsigned int m68k_read_8 (unsigned int a, int do_fake)
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{
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a&=0xffffff;
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@ -557,9 +577,7 @@ static unsigned int m68k_read_8 (unsigned int a, int do_fake)
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#ifdef EMU_CORE_DEBUG
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if(do_fake&&((ppop&0x3f)==0x3a||(ppop&0x3f)==0x3b)) return lastread_d[lrp_mus++&15];
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#endif
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if(PicoAHW&1) return m68k_read_pcrelative_CD8(a);
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if((a&0xe00000)==0xe00000) return *(u8 *)(Pico.ram+((a^1)&0xffff)); // Ram
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return 0;
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return pm68k_read_memory_pcr_8(a);
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}
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static unsigned int m68k_read_16(unsigned int a, int do_fake)
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{
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@ -568,9 +586,7 @@ static unsigned int m68k_read_16(unsigned int a, int do_fake)
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#ifdef EMU_CORE_DEBUG
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if(do_fake&&((ppop&0x3f)==0x3a||(ppop&0x3f)==0x3b)) return lastread_d[lrp_mus++&15];
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#endif
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if(PicoAHW&1) return m68k_read_pcrelative_CD16(a);
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if((a&0xe00000)==0xe00000) return *(u16 *)(Pico.ram+(a&0xfffe)); // Ram
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return 0;
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return pm68k_read_memory_pcr_16(a);
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}
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static unsigned int m68k_read_32(unsigned int a, int do_fake)
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{
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@ -579,9 +595,7 @@ static unsigned int m68k_read_32(unsigned int a, int do_fake)
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#ifdef EMU_CORE_DEBUG
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if(do_fake&&((ppop&0x3f)==0x3a||(ppop&0x3f)==0x3b)) return lastread_d[lrp_mus++&15];
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#endif
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if(PicoAHW&1) return m68k_read_pcrelative_CD32(a);
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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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return 0;
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return pm68k_read_memory_pcr_32(a);
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}
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unsigned int m68k_read_pcrelative_8 (unsigned int a) { return m68k_read_8 (a, 1); }
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@ -593,6 +607,24 @@ unsigned int m68k_read_disassembler_8 (unsigned int a) { return m68k_read_8 (a,
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unsigned int m68k_read_disassembler_16(unsigned int a) { return m68k_read_16(a, 0); }
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unsigned int m68k_read_disassembler_32(unsigned int a) { return m68k_read_32(a, 0); }
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static unsigned int m68k_read_memory_pcr_8(unsigned int a)
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{
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if((a&0xe00000)==0xe00000) return *(u8 *)(Pico.ram+((a^1)&0xffff)); // Ram
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return 0;
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}
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static unsigned int m68k_read_memory_pcr_16(unsigned int a)
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{
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if((a&0xe00000)==0xe00000) return *(u16 *)(Pico.ram+(a&0xfffe)); // Ram
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return 0;
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}
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static unsigned int m68k_read_memory_pcr_32(unsigned int a)
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{
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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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return 0;
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}
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#ifdef EMU_CORE_DEBUG
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// ROM only
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unsigned int m68k_read_memory_8(unsigned int a)
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@ -628,47 +660,30 @@ unsigned int m68k_read_memory_32(unsigned int a)
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void m68k_write_memory_8(unsigned int address, unsigned int value) { lastwrite_mus_d[lwp_mus++&15] = value; }
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void m68k_write_memory_16(unsigned int address, unsigned int value) { lastwrite_mus_d[lwp_mus++&15] = value; }
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void m68k_write_memory_32(unsigned int address, unsigned int value) { lastwrite_mus_d[lwp_mus++&15] = value; }
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#else
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unsigned char PicoReadCD8w (unsigned int a);
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unsigned short PicoReadCD16w(unsigned int a);
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unsigned int PicoReadCD32w(unsigned int a);
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void PicoWriteCD8w (unsigned int a, unsigned char d);
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void PicoWriteCD16w(unsigned int a, unsigned short d);
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void PicoWriteCD32w(unsigned int a, unsigned int d);
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#else // if !EMU_CORE_DEBUG
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/* it appears that Musashi doesn't always mask the unused bits */
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unsigned int m68k_read_memory_8(unsigned int address)
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{
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unsigned int d = (PicoAHW&1) ? PicoReadCD8w(address) : PicoRead8(address);
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return d&0xff;
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}
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unsigned int m68k_read_memory_8 (unsigned int address) { return pm68k_read_memory_8 (address) & 0xff; }
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unsigned int m68k_read_memory_16(unsigned int address) { return pm68k_read_memory_16(address) & 0xffff; }
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unsigned int m68k_read_memory_32(unsigned int address) { return pm68k_read_memory_32(address); }
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void m68k_write_memory_8 (unsigned int address, unsigned int value) { pm68k_write_memory_8 (address, (u8)value); }
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void m68k_write_memory_16(unsigned int address, unsigned int value) { pm68k_write_memory_16(address,(u16)value); }
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void m68k_write_memory_32(unsigned int address, unsigned int value) { pm68k_write_memory_32(address, value); }
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#endif // !EMU_CORE_DEBUG
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unsigned int m68k_read_memory_16(unsigned int address)
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static void m68k_mem_setup(void)
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{
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unsigned int d = (PicoAHW&1) ? PicoReadCD16w(address) : PicoRead16(address);
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return d&0xffff;
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pm68k_read_memory_8 = PicoRead8;
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pm68k_read_memory_16 = PicoRead16;
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pm68k_read_memory_32 = PicoRead32;
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pm68k_write_memory_8 = PicoWrite8;
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pm68k_write_memory_16 = PicoWrite16;
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pm68k_write_memory_32 = PicoWrite32;
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pm68k_read_memory_pcr_8 = m68k_read_memory_pcr_8;
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pm68k_read_memory_pcr_16 = m68k_read_memory_pcr_16;
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pm68k_read_memory_pcr_32 = m68k_read_memory_pcr_32;
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}
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unsigned int m68k_read_memory_32(unsigned int address)
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{
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return (PicoAHW&1) ? PicoReadCD32w(address) : PicoRead32(address);
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}
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void m68k_write_memory_8(unsigned int address, unsigned int value)
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{
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if (PicoAHW&1) PicoWriteCD8w(address, (u8)value); else PicoWrite8(address, (u8)value);
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}
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void m68k_write_memory_16(unsigned int address, unsigned int value)
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{
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if (PicoAHW&1) PicoWriteCD16w(address,(u16)value); else PicoWrite16(address,(u16)value);
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}
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void m68k_write_memory_32(unsigned int address, unsigned int value)
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{
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if (PicoAHW&1) PicoWriteCD32w(address, value); else PicoWrite32(address, value);
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}
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#endif
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#endif // EMU_M68K
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