| 1 | #include "../PicoInt.h" |
| 2 | |
| 3 | #ifndef UTYPES_DEFINED |
| 4 | typedef unsigned char u8; |
| 5 | typedef unsigned short u16; |
| 6 | typedef unsigned int u32; |
| 7 | #define UTYPES_DEFINED |
| 8 | #endif |
| 9 | |
| 10 | // ----------------------------------------------------------------- |
| 11 | // Read Rom and read Ram |
| 12 | |
| 13 | static u32 PicoReadPico8(u32 a) |
| 14 | { |
| 15 | u32 d=0; |
| 16 | |
| 17 | if ((a&0xe00000)==0xe00000) { d = *(u8 *)(Pico.ram+((a^1)&0xffff)); goto end; } // Ram |
| 18 | if (a<Pico.romsize) { d = *(u8 *)(Pico.rom+(a^1)); goto end; } // Rom |
| 19 | |
| 20 | a&=0xffffff; |
| 21 | |
| 22 | if ((a&0xffffe0)==0xc00000) { // VDP |
| 23 | d=PicoVideoRead(a); |
| 24 | if ((a&1)==0) d>>=8; |
| 25 | goto end; |
| 26 | } |
| 27 | |
| 28 | elprintf(EL_UIO, "r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc); |
| 29 | |
| 30 | end: |
| 31 | elprintf(EL_IO, "r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc); |
| 32 | return d; |
| 33 | } |
| 34 | |
| 35 | static u32 PicoReadPico16(u32 a) |
| 36 | { |
| 37 | u32 d=0; |
| 38 | |
| 39 | if ((a&0xe00000)==0xe00000) { d=*(u16 *)(Pico.ram+(a&0xfffe)); goto end; } // Ram |
| 40 | |
| 41 | a&=0xfffffe; |
| 42 | |
| 43 | if (a<Pico.romsize) { d = *(u16 *)(Pico.rom+a); goto end; } // Rom |
| 44 | |
| 45 | if ((a&0xffffe0)==0xc00000) { |
| 46 | d = PicoVideoRead(a); |
| 47 | goto end; |
| 48 | } |
| 49 | |
| 50 | elprintf(EL_UIO, "r16: %06x, %04x @%06x", a&0xffffff, d, SekPc); |
| 51 | |
| 52 | end: |
| 53 | elprintf(EL_IO, "r16: %06x, %04x @%06x", a&0xffffff, d, SekPc); |
| 54 | return d; |
| 55 | } |
| 56 | |
| 57 | static u32 PicoReadPico32(u32 a) |
| 58 | { |
| 59 | u32 d=0; |
| 60 | |
| 61 | if ((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); d = (pm[0]<<16)|pm[1]; goto end; } // Ram |
| 62 | |
| 63 | a&=0xfffffe; |
| 64 | |
| 65 | if (a<Pico.romsize) { u16 *pm=(u16 *)(Pico.rom+a); d = (pm[0]<<16)|pm[1]; goto end; } // Rom |
| 66 | |
| 67 | if ((a&0xffffe0)==0xc00000) { |
| 68 | d = (PicoVideoRead(a)<<16)|PicoVideoRead(a+2); |
| 69 | goto end; |
| 70 | } |
| 71 | |
| 72 | elprintf(EL_UIO, "r32: %06x, %08x @%06x", a&0xffffff, d, SekPc); |
| 73 | |
| 74 | end: |
| 75 | elprintf(EL_IO, "r32: %06x, %08x @%06x", a&0xffffff, d, SekPc); |
| 76 | return d; |
| 77 | } |
| 78 | |
| 79 | // ----------------------------------------------------------------- |
| 80 | // Write Ram |
| 81 | |
| 82 | static void PicoWritePico8(u32 a,u8 d) |
| 83 | { |
| 84 | elprintf(EL_IO, "w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc); |
| 85 | |
| 86 | if ((a&0xe00000)==0xe00000) { *(u8 *)(Pico.ram+((a^1)&0xffff))=d; return; } // Ram |
| 87 | |
| 88 | a&=0xffffff; |
| 89 | if ((a&0xffffe0)==0xc00000) { // VDP |
| 90 | d&=0xff; |
| 91 | PicoVideoWrite(a,(u16)(d|(d<<8))); // Byte access gets mirrored |
| 92 | return; |
| 93 | } |
| 94 | |
| 95 | elprintf(EL_UIO, "w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc); |
| 96 | } |
| 97 | |
| 98 | static void PicoWritePico16(u32 a,u16 d) |
| 99 | { |
| 100 | elprintf(EL_IO, "w16: %06x, %04x", a&0xffffff, d); |
| 101 | |
| 102 | if ((a&0xe00000)==0xe00000) { *(u16 *)(Pico.ram+(a&0xfffe))=d; return; } // Ram |
| 103 | |
| 104 | a&=0xfffffe; |
| 105 | if ((a&0xffffe0)==0xc00000) { PicoVideoWrite(a,(u16)d); return; } // VDP |
| 106 | |
| 107 | elprintf(EL_UIO, "w16: %06x, %04x", a&0xffffff, d); |
| 108 | } |
| 109 | |
| 110 | static void PicoWritePico32(u32 a,u32 d) |
| 111 | { |
| 112 | elprintf(EL_IO, "w32: %06x, %08x", a&0xffffff, d); |
| 113 | |
| 114 | if ((a&0xe00000)==0xe00000) |
| 115 | { |
| 116 | // Ram: |
| 117 | u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); |
| 118 | pm[0]=(u16)(d>>16); pm[1]=(u16)d; |
| 119 | return; |
| 120 | } |
| 121 | |
| 122 | a&=0xfffffe; |
| 123 | if ((a&0xffffe0)==0xc00000) |
| 124 | { |
| 125 | // VDP: |
| 126 | PicoVideoWrite(a, (u16)(d>>16)); |
| 127 | PicoVideoWrite(a+2,(u16)d); |
| 128 | return; |
| 129 | } |
| 130 | |
| 131 | elprintf(EL_UIO, "w32: %06x, %08x", a&0xffffff, d); |
| 132 | } |
| 133 | |
| 134 | #ifdef EMU_M68K |
| 135 | extern unsigned int (*pm68k_read_memory_8) (unsigned int address); |
| 136 | extern unsigned int (*pm68k_read_memory_16)(unsigned int address); |
| 137 | extern unsigned int (*pm68k_read_memory_32)(unsigned int address); |
| 138 | extern void (*pm68k_write_memory_8) (unsigned int address, unsigned char value); |
| 139 | extern void (*pm68k_write_memory_16)(unsigned int address, unsigned short value); |
| 140 | extern void (*pm68k_write_memory_32)(unsigned int address, unsigned int value); |
| 141 | extern unsigned int (*pm68k_read_memory_pcr_8) (unsigned int address); |
| 142 | extern unsigned int (*pm68k_read_memory_pcr_16)(unsigned int address); |
| 143 | extern unsigned int (*pm68k_read_memory_pcr_32)(unsigned int address); |
| 144 | |
| 145 | static unsigned int m68k_read_memory_pcrp_8(unsigned int a) |
| 146 | { |
| 147 | if((a&0xe00000)==0xe00000) return *(u8 *)(Pico.ram+((a^1)&0xffff)); // Ram |
| 148 | return 0; |
| 149 | } |
| 150 | |
| 151 | static unsigned int m68k_read_memory_pcrp_16(unsigned int a) |
| 152 | { |
| 153 | if((a&0xe00000)==0xe00000) return *(u16 *)(Pico.ram+(a&0xfffe)); // Ram |
| 154 | return 0; |
| 155 | } |
| 156 | |
| 157 | static unsigned int m68k_read_memory_pcrp_32(unsigned int a) |
| 158 | { |
| 159 | if((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); return (pm[0]<<16)|pm[1]; } // Ram |
| 160 | return 0; |
| 161 | } |
| 162 | #endif // EMU_M68K |
| 163 | |
| 164 | |
| 165 | PICO_INTERNAL void PicoMemSetupPico(void) |
| 166 | { |
| 167 | #ifdef EMU_M68K |
| 168 | pm68k_read_memory_8 = PicoReadPico8; |
| 169 | pm68k_read_memory_16 = PicoReadPico16; |
| 170 | pm68k_read_memory_32 = PicoReadPico32; |
| 171 | pm68k_write_memory_8 = PicoWritePico8; |
| 172 | pm68k_write_memory_16 = PicoWritePico16; |
| 173 | pm68k_write_memory_32 = PicoWritePico32; |
| 174 | pm68k_read_memory_pcr_8 = m68k_read_memory_pcrp_8; |
| 175 | pm68k_read_memory_pcr_16 = m68k_read_memory_pcrp_16; |
| 176 | pm68k_read_memory_pcr_32 = m68k_read_memory_pcrp_32; |
| 177 | #endif |
| 178 | } |
| 179 | |