| 1 | #include "../pico_int.h" |
| 2 | #include "../sound/sn76496.h" |
| 3 | |
| 4 | #ifndef UTYPES_DEFINED |
| 5 | typedef unsigned char u8; |
| 6 | typedef unsigned short u16; |
| 7 | typedef unsigned int u32; |
| 8 | #define UTYPES_DEFINED |
| 9 | #endif |
| 10 | |
| 11 | |
| 12 | // ----------------------------------------------------------------- |
| 13 | // Read Rom and read Ram |
| 14 | |
| 15 | static u32 PicoReadPico8(u32 a) |
| 16 | { |
| 17 | u32 d=0; |
| 18 | |
| 19 | if ((a&0xe00000)==0xe00000) { d = *(u8 *)(Pico.ram+((a^1)&0xffff)); goto end; } // Ram |
| 20 | if (a<Pico.romsize) { d = *(u8 *)(Pico.rom+(a^1)); goto end; } // Rom |
| 21 | |
| 22 | a&=0xffffff; |
| 23 | |
| 24 | if ((a&0xfffff0)==0xc00000) { // VDP |
| 25 | d=PicoVideoRead8(a); |
| 26 | goto end; |
| 27 | } |
| 28 | |
| 29 | if ((a&0xffffe0)==0x800000) // Pico I/O |
| 30 | { |
| 31 | switch (a & 0x1f) |
| 32 | { |
| 33 | case 0x01: d = PicoPicohw.r1; break; |
| 34 | case 0x03: |
| 35 | d = PicoPad[0]&0x1f; // d-pad |
| 36 | d |= (PicoPad[0]&0x20) << 2; // pen push -> C |
| 37 | d = ~d; |
| 38 | break; |
| 39 | |
| 40 | case 0x05: d = (PicoPicohw.pen_pos[0] >> 8); break; // what is MS bit for? Games read it.. |
| 41 | case 0x07: d = PicoPicohw.pen_pos[0] & 0xff; break; |
| 42 | case 0x09: d = (PicoPicohw.pen_pos[1] >> 8); break; |
| 43 | case 0x0b: d = PicoPicohw.pen_pos[1] & 0xff; break; |
| 44 | case 0x0d: d = (1 << (PicoPicohw.page & 7)) - 1; break; |
| 45 | case 0x12: d = PicoPicohw.fifo_bytes == 0 ? 0x80 : 0; break; // guess |
| 46 | default: |
| 47 | elprintf(EL_UIO, "r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc); |
| 48 | break; |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | //elprintf(EL_UIO, "r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc); |
| 53 | |
| 54 | end: |
| 55 | elprintf(EL_IO, "r8 : %06x, %02x @%06x", a&0xffffff, (u8)d, SekPc); |
| 56 | return d; |
| 57 | } |
| 58 | |
| 59 | static u32 PicoReadPico16(u32 a) |
| 60 | { |
| 61 | u32 d=0; |
| 62 | |
| 63 | if ((a&0xe00000)==0xe00000) { d=*(u16 *)(Pico.ram+(a&0xfffe)); goto end; } // Ram |
| 64 | |
| 65 | a&=0xfffffe; |
| 66 | |
| 67 | if (a<Pico.romsize) { d = *(u16 *)(Pico.rom+a); goto end; } // Rom |
| 68 | |
| 69 | if ((a&0xfffff0)==0xc00000) { |
| 70 | d = PicoVideoRead(a); |
| 71 | goto end; |
| 72 | } |
| 73 | |
| 74 | if (a == 0x800010) |
| 75 | d = (PicoPicohw.fifo_bytes > 0x3f) ? 0 : (0x3f - PicoPicohw.fifo_bytes); |
| 76 | else if (a == 0x800012) |
| 77 | d = PicoPicohw.fifo_bytes == 0 ? 0x8000 : 0; // guess |
| 78 | else |
| 79 | elprintf(EL_UIO, "r16: %06x, %04x @%06x", a&0xffffff, d, SekPc); |
| 80 | |
| 81 | //elprintf(EL_UIO, "r16: %06x, %04x @%06x", a&0xffffff, d, SekPc); |
| 82 | |
| 83 | end: |
| 84 | elprintf(EL_IO, "r16: %06x, %04x @%06x", a&0xffffff, d, SekPc); |
| 85 | return d; |
| 86 | } |
| 87 | |
| 88 | static u32 PicoReadPico32(u32 a) |
| 89 | { |
| 90 | u32 d=0; |
| 91 | |
| 92 | if ((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); d = (pm[0]<<16)|pm[1]; goto end; } // Ram |
| 93 | |
| 94 | a&=0xfffffe; |
| 95 | |
| 96 | if (a<Pico.romsize) { u16 *pm=(u16 *)(Pico.rom+a); d = (pm[0]<<16)|pm[1]; goto end; } // Rom |
| 97 | |
| 98 | if ((a&0xfffff0)==0xc00000) { |
| 99 | d = (PicoVideoRead(a)<<16)|PicoVideoRead(a+2); |
| 100 | goto end; |
| 101 | } |
| 102 | |
| 103 | elprintf(EL_UIO, "r32: %06x, %08x @%06x", a&0xffffff, d, SekPc); |
| 104 | |
| 105 | end: |
| 106 | elprintf(EL_IO, "r32: %06x, %08x @%06x", a&0xffffff, d, SekPc); |
| 107 | return d; |
| 108 | } |
| 109 | |
| 110 | // ----------------------------------------------------------------- |
| 111 | // Write Ram |
| 112 | /* |
| 113 | void dump(u16 w) |
| 114 | { |
| 115 | static FILE *f[0x10] = { NULL, }; |
| 116 | char fname[32]; |
| 117 | int num = PicoPicohw.r12 & 0xf; |
| 118 | |
| 119 | w = (w << 8) | (w >> 8); |
| 120 | sprintf(fname, "ldump%i.bin", num); |
| 121 | if (f[num] == NULL) |
| 122 | f[num] = fopen(fname, "wb"); |
| 123 | fwrite(&w, 1, 2, f[num]); |
| 124 | //fclose(f); |
| 125 | } |
| 126 | */ |
| 127 | |
| 128 | static void PicoWritePico8(u32 a,u8 d) |
| 129 | { |
| 130 | elprintf(EL_IO, "w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc); |
| 131 | |
| 132 | if ((a&0xe00000)==0xe00000) { *(u8 *)(Pico.ram+((a^1)&0xffff))=d; return; } // Ram |
| 133 | |
| 134 | a&=0xffffff; |
| 135 | if ((a&0xfffff9)==0xc00011) { if (PicoOpt&2) SN76496Write(d); return; } // PSG Sound |
| 136 | |
| 137 | if ((a&0xfffff0)==0xc00000) { // VDP |
| 138 | d&=0xff; |
| 139 | PicoVideoWrite(a,(u16)(d|(d<<8))); // Byte access gets mirrored |
| 140 | return; |
| 141 | } |
| 142 | |
| 143 | switch (a & 0x1f) { |
| 144 | case 0x19: case 0x1b: case 0x1d: case 0x1f: break; // 'S' 'E' 'G' 'A' |
| 145 | default: |
| 146 | elprintf(EL_UIO, "w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc); |
| 147 | break; |
| 148 | } |
| 149 | //elprintf(EL_UIO, "w8 : %06x, %02x @%06x", a&0xffffff, d, SekPc); |
| 150 | } |
| 151 | |
| 152 | static void PicoWritePico16(u32 a,u16 d) |
| 153 | { |
| 154 | elprintf(EL_IO, "w16: %06x, %04x", a&0xffffff, d); |
| 155 | |
| 156 | if ((a&0xe00000)==0xe00000) { *(u16 *)(Pico.ram+(a&0xfffe))=d; return; } // Ram |
| 157 | |
| 158 | a&=0xfffffe; |
| 159 | if ((a&0xfffff0)==0xc00000) { PicoVideoWrite(a,(u16)d); return; } // VDP |
| 160 | |
| 161 | //if (a == 0x800010) dump(d); |
| 162 | if (a == 0x800010) |
| 163 | { |
| 164 | PicoPicohw.fifo_bytes += 2; |
| 165 | |
| 166 | if (PicoPicohw.xpcm_ptr < PicoPicohw.xpcm_buffer + XPCM_BUFFER_SIZE) { |
| 167 | *PicoPicohw.xpcm_ptr++ = d >> 8; |
| 168 | *PicoPicohw.xpcm_ptr++ = d; |
| 169 | } |
| 170 | else if (PicoPicohw.xpcm_ptr == PicoPicohw.xpcm_buffer + XPCM_BUFFER_SIZE) { |
| 171 | elprintf(EL_ANOMALY|EL_PICOHW, "xpcm_buffer overflow!"); |
| 172 | PicoPicohw.xpcm_ptr++; |
| 173 | } |
| 174 | } |
| 175 | else if (a == 0x800012) { |
| 176 | int r12_old = PicoPicohw.r12; |
| 177 | PicoPicohw.r12 = d; |
| 178 | if (r12_old != d) |
| 179 | PicoReratePico(); |
| 180 | } |
| 181 | else |
| 182 | elprintf(EL_UIO, "w16: %06x, %04x", a&0xffffff, d); |
| 183 | |
| 184 | //elprintf(EL_UIO, "w16: %06x, %04x", a&0xffffff, d); |
| 185 | } |
| 186 | |
| 187 | static void PicoWritePico32(u32 a,u32 d) |
| 188 | { |
| 189 | elprintf(EL_IO, "w32: %06x, %08x", a&0xffffff, d); |
| 190 | |
| 191 | if ((a&0xe00000)==0xe00000) |
| 192 | { |
| 193 | // Ram: |
| 194 | u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); |
| 195 | pm[0]=(u16)(d>>16); pm[1]=(u16)d; |
| 196 | return; |
| 197 | } |
| 198 | |
| 199 | a&=0xfffffe; |
| 200 | if ((a&0xfffff0)==0xc00000) |
| 201 | { |
| 202 | // VDP: |
| 203 | PicoVideoWrite(a, (u16)(d>>16)); |
| 204 | PicoVideoWrite(a+2,(u16)d); |
| 205 | return; |
| 206 | } |
| 207 | |
| 208 | elprintf(EL_UIO, "w32: %06x, %08x", a&0xffffff, d); |
| 209 | } |
| 210 | |
| 211 | #ifdef EMU_M68K |
| 212 | extern unsigned int (*pm68k_read_memory_8) (unsigned int address); |
| 213 | extern unsigned int (*pm68k_read_memory_16)(unsigned int address); |
| 214 | extern unsigned int (*pm68k_read_memory_32)(unsigned int address); |
| 215 | extern void (*pm68k_write_memory_8) (unsigned int address, unsigned char value); |
| 216 | extern void (*pm68k_write_memory_16)(unsigned int address, unsigned short value); |
| 217 | extern void (*pm68k_write_memory_32)(unsigned int address, unsigned int value); |
| 218 | extern unsigned int (*pm68k_read_memory_pcr_8) (unsigned int address); |
| 219 | extern unsigned int (*pm68k_read_memory_pcr_16)(unsigned int address); |
| 220 | extern unsigned int (*pm68k_read_memory_pcr_32)(unsigned int address); |
| 221 | |
| 222 | static unsigned int m68k_read_memory_pcrp_8(unsigned int a) |
| 223 | { |
| 224 | if((a&0xe00000)==0xe00000) return *(u8 *)(Pico.ram+((a^1)&0xffff)); // Ram |
| 225 | return 0; |
| 226 | } |
| 227 | |
| 228 | static unsigned int m68k_read_memory_pcrp_16(unsigned int a) |
| 229 | { |
| 230 | if((a&0xe00000)==0xe00000) return *(u16 *)(Pico.ram+(a&0xfffe)); // Ram |
| 231 | return 0; |
| 232 | } |
| 233 | |
| 234 | static unsigned int m68k_read_memory_pcrp_32(unsigned int a) |
| 235 | { |
| 236 | if((a&0xe00000)==0xe00000) { u16 *pm=(u16 *)(Pico.ram+(a&0xfffe)); return (pm[0]<<16)|pm[1]; } // Ram |
| 237 | return 0; |
| 238 | } |
| 239 | #endif // EMU_M68K |
| 240 | |
| 241 | |
| 242 | PICO_INTERNAL void PicoMemSetupPico(void) |
| 243 | { |
| 244 | #ifdef EMU_C68K |
| 245 | PicoCpuCM68k.checkpc=PicoCheckPc; |
| 246 | PicoCpuCM68k.fetch8 =PicoCpuCM68k.read8 =PicoReadPico8; |
| 247 | PicoCpuCM68k.fetch16=PicoCpuCM68k.read16=PicoReadPico16; |
| 248 | PicoCpuCM68k.fetch32=PicoCpuCM68k.read32=PicoReadPico32; |
| 249 | PicoCpuCM68k.write8 =PicoWritePico8; |
| 250 | PicoCpuCM68k.write16=PicoWritePico16; |
| 251 | PicoCpuCM68k.write32=PicoWritePico32; |
| 252 | #endif |
| 253 | #ifdef EMU_M68K |
| 254 | pm68k_read_memory_8 = PicoReadPico8; |
| 255 | pm68k_read_memory_16 = PicoReadPico16; |
| 256 | pm68k_read_memory_32 = PicoReadPico32; |
| 257 | pm68k_write_memory_8 = PicoWritePico8; |
| 258 | pm68k_write_memory_16 = PicoWritePico16; |
| 259 | pm68k_write_memory_32 = PicoWritePico32; |
| 260 | pm68k_read_memory_pcr_8 = m68k_read_memory_pcrp_8; |
| 261 | pm68k_read_memory_pcr_16 = m68k_read_memory_pcrp_16; |
| 262 | pm68k_read_memory_pcr_32 = m68k_read_memory_pcrp_32; |
| 263 | #endif |
| 264 | #ifdef EMU_F68K |
| 265 | // use standard setup, only override handlers |
| 266 | PicoMemSetup(); |
| 267 | PicoCpuFM68k.read_byte =PicoReadPico8; |
| 268 | PicoCpuFM68k.read_word =PicoReadPico16; |
| 269 | PicoCpuFM68k.read_long =PicoReadPico32; |
| 270 | PicoCpuFM68k.write_byte=PicoWritePico8; |
| 271 | PicoCpuFM68k.write_word=PicoWritePico16; |
| 272 | PicoCpuFM68k.write_long=PicoWritePico32; |
| 273 | #endif |
| 274 | } |
| 275 | |