| 1 | /*\r |
| 2 | * Memory I/O handlers for Sega/Mega CD.\r |
| 3 | * (C) notaz, 2007-2009\r |
| 4 | *\r |
| 5 | * This work is licensed under the terms of MAME license.\r |
| 6 | * See COPYING file in the top-level directory.\r |
| 7 | */\r |
| 8 | \r |
| 9 | #include "../pico_int.h"\r |
| 10 | #include "../memory.h"\r |
| 11 | \r |
| 12 | #include "gfx_cd.h"\r |
| 13 | \r |
| 14 | uptr s68k_read8_map [0x1000000 >> M68K_MEM_SHIFT];\r |
| 15 | uptr s68k_read16_map [0x1000000 >> M68K_MEM_SHIFT];\r |
| 16 | uptr s68k_write8_map [0x1000000 >> M68K_MEM_SHIFT];\r |
| 17 | uptr s68k_write16_map[0x1000000 >> M68K_MEM_SHIFT];\r |
| 18 | \r |
| 19 | MAKE_68K_READ8(s68k_read8, s68k_read8_map)\r |
| 20 | MAKE_68K_READ16(s68k_read16, s68k_read16_map)\r |
| 21 | MAKE_68K_READ32(s68k_read32, s68k_read16_map)\r |
| 22 | MAKE_68K_WRITE8(s68k_write8, s68k_write8_map)\r |
| 23 | MAKE_68K_WRITE16(s68k_write16, s68k_write16_map)\r |
| 24 | MAKE_68K_WRITE32(s68k_write32, s68k_write16_map)\r |
| 25 | \r |
| 26 | // -----------------------------------------------------------------\r |
| 27 | \r |
| 28 | // provided by ASM code:\r |
| 29 | #ifdef _ASM_CD_MEMORY_C\r |
| 30 | u32 PicoReadS68k8_pr(u32 a);\r |
| 31 | u32 PicoReadS68k16_pr(u32 a);\r |
| 32 | void PicoWriteS68k8_pr(u32 a, u32 d);\r |
| 33 | void PicoWriteS68k16_pr(u32 a, u32 d);\r |
| 34 | \r |
| 35 | u32 PicoReadM68k8_cell0(u32 a);\r |
| 36 | u32 PicoReadM68k8_cell1(u32 a);\r |
| 37 | u32 PicoReadM68k16_cell0(u32 a);\r |
| 38 | u32 PicoReadM68k16_cell1(u32 a);\r |
| 39 | void PicoWriteM68k8_cell0(u32 a, u32 d);\r |
| 40 | void PicoWriteM68k8_cell1(u32 a, u32 d);\r |
| 41 | void PicoWriteM68k16_cell0(u32 a, u32 d);\r |
| 42 | void PicoWriteM68k16_cell1(u32 a, u32 d);\r |
| 43 | \r |
| 44 | u32 PicoReadS68k8_dec0(u32 a);\r |
| 45 | u32 PicoReadS68k8_dec1(u32 a);\r |
| 46 | u32 PicoReadS68k16_dec0(u32 a);\r |
| 47 | u32 PicoReadS68k16_dec1(u32 a);\r |
| 48 | void PicoWriteS68k8_dec_m0b0(u32 a, u32 d);\r |
| 49 | void PicoWriteS68k8_dec_m1b0(u32 a, u32 d);\r |
| 50 | void PicoWriteS68k8_dec_m2b0(u32 a, u32 d);\r |
| 51 | void PicoWriteS68k8_dec_m0b1(u32 a, u32 d);\r |
| 52 | void PicoWriteS68k8_dec_m1b1(u32 a, u32 d);\r |
| 53 | void PicoWriteS68k8_dec_m2b1(u32 a, u32 d);\r |
| 54 | void PicoWriteS68k16_dec_m0b0(u32 a, u32 d);\r |
| 55 | void PicoWriteS68k16_dec_m1b0(u32 a, u32 d);\r |
| 56 | void PicoWriteS68k16_dec_m2b0(u32 a, u32 d);\r |
| 57 | void PicoWriteS68k16_dec_m0b1(u32 a, u32 d);\r |
| 58 | void PicoWriteS68k16_dec_m1b1(u32 a, u32 d);\r |
| 59 | void PicoWriteS68k16_dec_m2b1(u32 a, u32 d);\r |
| 60 | #endif\r |
| 61 | \r |
| 62 | static void remap_prg_window(u32 r1, u32 r3);\r |
| 63 | static void remap_word_ram(u32 r3);\r |
| 64 | \r |
| 65 | // poller detection\r |
| 66 | #define POLL_LIMIT 16\r |
| 67 | #define POLL_CYCLES 64\r |
| 68 | \r |
| 69 | void m68k_comm_check(u32 a)\r |
| 70 | {\r |
| 71 | pcd_sync_s68k(SekCyclesDone(), 0);\r |
| 72 | if (SekNotPolling || a != Pico_mcd->m.m68k_poll_a) {\r |
| 73 | Pico_mcd->m.m68k_poll_a = a;\r |
| 74 | Pico_mcd->m.m68k_poll_cnt = 0;\r |
| 75 | SekNotPolling = 0;\r |
| 76 | return;\r |
| 77 | }\r |
| 78 | Pico_mcd->m.m68k_poll_cnt++;\r |
| 79 | }\r |
| 80 | \r |
| 81 | #ifndef _ASM_CD_MEMORY_C\r |
| 82 | static u32 m68k_reg_read16(u32 a)\r |
| 83 | {\r |
| 84 | u32 d = 0;\r |
| 85 | a &= 0x3e;\r |
| 86 | \r |
| 87 | switch (a) {\r |
| 88 | case 0:\r |
| 89 | // here IFL2 is always 0, just like in Gens\r |
| 90 | d = ((Pico_mcd->s68k_regs[0x33] << 13) & 0x8000)\r |
| 91 | | Pico_mcd->m.busreq;\r |
| 92 | goto end;\r |
| 93 | case 2:\r |
| 94 | m68k_comm_check(a);\r |
| 95 | d = (Pico_mcd->s68k_regs[a]<<8) | (Pico_mcd->s68k_regs[a+1]&0xc7);\r |
| 96 | elprintf(EL_CDREG3, "m68k_regs r3: %02x @%06x", (u8)d, SekPc);\r |
| 97 | goto end;\r |
| 98 | case 4:\r |
| 99 | d = Pico_mcd->s68k_regs[4]<<8;\r |
| 100 | goto end;\r |
| 101 | case 6:\r |
| 102 | d = *(u16 *)(Pico_mcd->bios + 0x72);\r |
| 103 | goto end;\r |
| 104 | case 8:\r |
| 105 | d = Read_CDC_Host(0);\r |
| 106 | goto end;\r |
| 107 | case 0xA:\r |
| 108 | elprintf(EL_UIO, "m68k FIXME: reserved read");\r |
| 109 | goto end;\r |
| 110 | case 0xC: // 384 cycle stopwatch timer\r |
| 111 | // ugh..\r |
| 112 | d = pcd_cycles_m68k_to_s68k(SekCyclesDone());\r |
| 113 | d = (d - Pico_mcd->m.stopwatch_base_c) / 384;\r |
| 114 | d &= 0x0fff;\r |
| 115 | elprintf(EL_CDREGS, "m68k stopwatch timer read (%04x)", d);\r |
| 116 | goto end;\r |
| 117 | }\r |
| 118 | \r |
| 119 | if (a < 0x30) {\r |
| 120 | // comm flag/cmd/status (0xE-0x2F)\r |
| 121 | m68k_comm_check(a);\r |
| 122 | d = (Pico_mcd->s68k_regs[a]<<8) | Pico_mcd->s68k_regs[a+1];\r |
| 123 | goto end;\r |
| 124 | }\r |
| 125 | \r |
| 126 | elprintf(EL_UIO, "m68k_regs FIXME invalid read @ %02x", a);\r |
| 127 | \r |
| 128 | end:\r |
| 129 | return d;\r |
| 130 | }\r |
| 131 | #endif\r |
| 132 | \r |
| 133 | #ifndef _ASM_CD_MEMORY_C\r |
| 134 | static\r |
| 135 | #endif\r |
| 136 | void m68k_reg_write8(u32 a, u32 d)\r |
| 137 | {\r |
| 138 | u32 dold;\r |
| 139 | a &= 0x3f;\r |
| 140 | \r |
| 141 | switch (a) {\r |
| 142 | case 0:\r |
| 143 | d &= 1;\r |
| 144 | if (d && (Pico_mcd->s68k_regs[0x33] & PCDS_IEN2)) {\r |
| 145 | elprintf(EL_INTS, "m68k: s68k irq 2");\r |
| 146 | pcd_sync_s68k(SekCyclesDone(), 0);\r |
| 147 | SekInterruptS68k(2);\r |
| 148 | }\r |
| 149 | return;\r |
| 150 | case 1:\r |
| 151 | d &= 3;\r |
| 152 | dold = Pico_mcd->m.busreq;\r |
| 153 | if (!(d & 1))\r |
| 154 | d |= 2; // verified: can't release bus on reset\r |
| 155 | if (dold == d)\r |
| 156 | return;\r |
| 157 | \r |
| 158 | pcd_sync_s68k(SekCyclesDone(), 0);\r |
| 159 | \r |
| 160 | if ((dold ^ d) & 1)\r |
| 161 | elprintf(EL_INTSW, "m68k: s68k reset %i", !(d&1));\r |
| 162 | if (!(d & 1))\r |
| 163 | Pico_mcd->m.state_flags |= PCD_ST_S68K_RST;\r |
| 164 | else if (d == 1 && (Pico_mcd->m.state_flags & PCD_ST_S68K_RST)) {\r |
| 165 | Pico_mcd->m.state_flags &= ~PCD_ST_S68K_RST;\r |
| 166 | elprintf(EL_CDREGS, "m68k: resetting s68k");\r |
| 167 | SekResetS68k();\r |
| 168 | }\r |
| 169 | if ((dold ^ d) & 2) {\r |
| 170 | elprintf(EL_INTSW, "m68k: s68k brq %i", d >> 1);\r |
| 171 | remap_prg_window(d, Pico_mcd->s68k_regs[3]);\r |
| 172 | }\r |
| 173 | Pico_mcd->m.busreq = d;\r |
| 174 | return;\r |
| 175 | case 2:\r |
| 176 | elprintf(EL_CDREGS, "m68k: prg wp=%02x", d);\r |
| 177 | Pico_mcd->s68k_regs[2] = d; // really use s68k side register\r |
| 178 | return;\r |
| 179 | case 3:\r |
| 180 | dold = Pico_mcd->s68k_regs[3];\r |
| 181 | elprintf(EL_CDREG3, "m68k_regs w3: %02x @%06x", (u8)d, SekPc);\r |
| 182 | if ((d ^ dold) & 0xc0) {\r |
| 183 | elprintf(EL_CDREGS, "m68k: prg bank: %i -> %i",\r |
| 184 | (Pico_mcd->s68k_regs[a]>>6), ((d>>6)&3));\r |
| 185 | remap_prg_window(Pico_mcd->m.busreq, d);\r |
| 186 | }\r |
| 187 | \r |
| 188 | // 2M mode state is tracked regardless of current mode\r |
| 189 | if (d & 2) {\r |
| 190 | Pico_mcd->m.dmna_ret_2m |= 2;\r |
| 191 | Pico_mcd->m.dmna_ret_2m &= ~1;\r |
| 192 | }\r |
| 193 | if (dold & 4) { // 1M mode\r |
| 194 | d ^= 2; // 0 sets DMNA, 1 does nothing\r |
| 195 | d = (d & 0xc2) | (dold & 0x1f);\r |
| 196 | }\r |
| 197 | else\r |
| 198 | d = (d & 0xc0) | (dold & 0x1c) | Pico_mcd->m.dmna_ret_2m;\r |
| 199 | \r |
| 200 | goto write_comm;\r |
| 201 | case 6:\r |
| 202 | Pico_mcd->bios[0x72 + 1] = d; // simple hint vector changer\r |
| 203 | return;\r |
| 204 | case 7:\r |
| 205 | Pico_mcd->bios[0x72] = d;\r |
| 206 | elprintf(EL_CDREGS, "hint vector set to %04x%04x",\r |
| 207 | ((u16 *)Pico_mcd->bios)[0x70/2], ((u16 *)Pico_mcd->bios)[0x72/2]);\r |
| 208 | return;\r |
| 209 | case 0x0f:\r |
| 210 | a = 0x0e;\r |
| 211 | case 0x0e:\r |
| 212 | goto write_comm;\r |
| 213 | }\r |
| 214 | \r |
| 215 | if ((a&0xf0) == 0x10)\r |
| 216 | goto write_comm;\r |
| 217 | \r |
| 218 | elprintf(EL_UIO, "m68k FIXME: invalid write? [%02x] %02x", a, d);\r |
| 219 | return;\r |
| 220 | \r |
| 221 | write_comm:\r |
| 222 | if (d == Pico_mcd->s68k_regs[a])\r |
| 223 | return;\r |
| 224 | \r |
| 225 | pcd_sync_s68k(SekCyclesDone(), 0);\r |
| 226 | Pico_mcd->s68k_regs[a] = d;\r |
| 227 | if (Pico_mcd->m.s68k_poll_a == (a & ~1)\r |
| 228 | && Pico_mcd->m.s68k_poll_cnt > POLL_LIMIT)\r |
| 229 | {\r |
| 230 | SekSetStopS68k(0);\r |
| 231 | Pico_mcd->m.s68k_poll_a = 0;\r |
| 232 | elprintf(EL_CDPOLL, "s68k poll release, a=%02x", a);\r |
| 233 | }\r |
| 234 | }\r |
| 235 | \r |
| 236 | u32 s68k_poll_detect(u32 a, u32 d)\r |
| 237 | {\r |
| 238 | #ifdef USE_POLL_DETECT\r |
| 239 | u32 cycles, cnt = 0;\r |
| 240 | if (SekIsStoppedS68k())\r |
| 241 | return d;\r |
| 242 | \r |
| 243 | cycles = SekCyclesDoneS68k();\r |
| 244 | if (!SekNotPolling && a == Pico_mcd->m.s68k_poll_a) {\r |
| 245 | u32 clkdiff = cycles - Pico_mcd->m.s68k_poll_clk;\r |
| 246 | if (clkdiff <= POLL_CYCLES) {\r |
| 247 | cnt = Pico_mcd->m.s68k_poll_cnt + 1;\r |
| 248 | //printf("-- diff: %u, cnt = %i\n", clkdiff, cnt);\r |
| 249 | if (Pico_mcd->m.s68k_poll_cnt > POLL_LIMIT) {\r |
| 250 | SekSetStopS68k(1);\r |
| 251 | elprintf(EL_CDPOLL, "s68k poll detected @%06x, a=%02x",\r |
| 252 | SekPcS68k, a);\r |
| 253 | }\r |
| 254 | }\r |
| 255 | }\r |
| 256 | Pico_mcd->m.s68k_poll_a = a;\r |
| 257 | Pico_mcd->m.s68k_poll_clk = cycles;\r |
| 258 | Pico_mcd->m.s68k_poll_cnt = cnt;\r |
| 259 | SekNotPollingS68k = 0;\r |
| 260 | #endif\r |
| 261 | return d;\r |
| 262 | }\r |
| 263 | \r |
| 264 | #define READ_FONT_DATA(basemask) \\r |
| 265 | { \\r |
| 266 | unsigned int fnt = *(unsigned int *)(Pico_mcd->s68k_regs + 0x4c); \\r |
| 267 | unsigned int col0 = (fnt >> 8) & 0x0f, col1 = (fnt >> 12) & 0x0f; \\r |
| 268 | if (fnt & (basemask << 0)) d = col1 ; else d = col0; \\r |
| 269 | if (fnt & (basemask << 1)) d |= col1 << 4; else d |= col0 << 4; \\r |
| 270 | if (fnt & (basemask << 2)) d |= col1 << 8; else d |= col0 << 8; \\r |
| 271 | if (fnt & (basemask << 3)) d |= col1 << 12; else d |= col0 << 12; \\r |
| 272 | }\r |
| 273 | \r |
| 274 | \r |
| 275 | #ifndef _ASM_CD_MEMORY_C\r |
| 276 | static\r |
| 277 | #endif\r |
| 278 | u32 s68k_reg_read16(u32 a)\r |
| 279 | {\r |
| 280 | u32 d=0;\r |
| 281 | \r |
| 282 | switch (a) {\r |
| 283 | case 0:\r |
| 284 | return ((Pico_mcd->s68k_regs[0]&3)<<8) | 1; // ver = 0, not in reset state\r |
| 285 | case 2:\r |
| 286 | d = (Pico_mcd->s68k_regs[2]<<8) | (Pico_mcd->s68k_regs[3]&0x1f);\r |
| 287 | elprintf(EL_CDREG3, "s68k_regs r3: %02x @%06x", (u8)d, SekPcS68k);\r |
| 288 | return s68k_poll_detect(a, d);\r |
| 289 | case 6:\r |
| 290 | return CDC_Read_Reg();\r |
| 291 | case 8:\r |
| 292 | return Read_CDC_Host(1); // Gens returns 0 here on byte reads\r |
| 293 | case 0xC:\r |
| 294 | d = SekCyclesDoneS68k() - Pico_mcd->m.stopwatch_base_c;\r |
| 295 | d /= 384;\r |
| 296 | d &= 0x0fff;\r |
| 297 | elprintf(EL_CDREGS, "s68k stopwatch timer read (%04x)", d);\r |
| 298 | return d;\r |
| 299 | case 0x30:\r |
| 300 | elprintf(EL_CDREGS, "s68k int3 timer read (%02x)", Pico_mcd->s68k_regs[31]);\r |
| 301 | return Pico_mcd->s68k_regs[31];\r |
| 302 | case 0x34: // fader\r |
| 303 | return 0; // no busy bit\r |
| 304 | case 0x50: // font data (check: Lunar 2, Silpheed)\r |
| 305 | READ_FONT_DATA(0x00100000);\r |
| 306 | return d;\r |
| 307 | case 0x52:\r |
| 308 | READ_FONT_DATA(0x00010000);\r |
| 309 | return d;\r |
| 310 | case 0x54:\r |
| 311 | READ_FONT_DATA(0x10000000);\r |
| 312 | return d;\r |
| 313 | case 0x56:\r |
| 314 | READ_FONT_DATA(0x01000000);\r |
| 315 | return d;\r |
| 316 | }\r |
| 317 | \r |
| 318 | d = (Pico_mcd->s68k_regs[a]<<8) | Pico_mcd->s68k_regs[a+1];\r |
| 319 | \r |
| 320 | if (a >= 0x0e && a < 0x30)\r |
| 321 | return s68k_poll_detect(a, d);\r |
| 322 | \r |
| 323 | return d;\r |
| 324 | }\r |
| 325 | \r |
| 326 | #ifndef _ASM_CD_MEMORY_C\r |
| 327 | static\r |
| 328 | #endif\r |
| 329 | void s68k_reg_write8(u32 a, u32 d)\r |
| 330 | {\r |
| 331 | // Warning: d might have upper bits set\r |
| 332 | switch (a) {\r |
| 333 | case 1:\r |
| 334 | if (!(d & 1))\r |
| 335 | pcd_soft_reset();\r |
| 336 | return;\r |
| 337 | case 2:\r |
| 338 | return; // only m68k can change WP\r |
| 339 | case 3: {\r |
| 340 | int dold = Pico_mcd->s68k_regs[3];\r |
| 341 | elprintf(EL_CDREG3, "s68k_regs w3: %02x @%06x", (u8)d, SekPcS68k);\r |
| 342 | d &= 0x1d;\r |
| 343 | d |= dold & 0xc2;\r |
| 344 | \r |
| 345 | // 2M mode state\r |
| 346 | if (d & 1) {\r |
| 347 | Pico_mcd->m.dmna_ret_2m |= 1;\r |
| 348 | Pico_mcd->m.dmna_ret_2m &= ~2; // DMNA clears\r |
| 349 | }\r |
| 350 | \r |
| 351 | if (d & 4)\r |
| 352 | {\r |
| 353 | if (!(dold & 4)) {\r |
| 354 | elprintf(EL_CDREG3, "wram mode 2M->1M");\r |
| 355 | wram_2M_to_1M(Pico_mcd->word_ram2M);\r |
| 356 | }\r |
| 357 | \r |
| 358 | if ((d ^ dold) & 0x1d)\r |
| 359 | remap_word_ram(d);\r |
| 360 | \r |
| 361 | if ((d ^ dold) & 0x05)\r |
| 362 | d &= ~2; // clear DMNA - swap complete\r |
| 363 | }\r |
| 364 | else\r |
| 365 | {\r |
| 366 | if (dold & 4) {\r |
| 367 | elprintf(EL_CDREG3, "wram mode 1M->2M");\r |
| 368 | wram_1M_to_2M(Pico_mcd->word_ram2M);\r |
| 369 | remap_word_ram(d);\r |
| 370 | }\r |
| 371 | d = (d & ~3) | Pico_mcd->m.dmna_ret_2m;\r |
| 372 | }\r |
| 373 | goto write_comm;\r |
| 374 | }\r |
| 375 | case 4:\r |
| 376 | elprintf(EL_CDREGS, "s68k CDC dest: %x", d&7);\r |
| 377 | Pico_mcd->s68k_regs[4] = (Pico_mcd->s68k_regs[4]&0xC0) | (d&7); // CDC mode\r |
| 378 | return;\r |
| 379 | case 5:\r |
| 380 | //dprintf("s68k CDC reg addr: %x", d&0xf);\r |
| 381 | break;\r |
| 382 | case 7:\r |
| 383 | CDC_Write_Reg(d);\r |
| 384 | return;\r |
| 385 | case 0xa:\r |
| 386 | elprintf(EL_CDREGS, "s68k set CDC dma addr");\r |
| 387 | break;\r |
| 388 | case 0xc:\r |
| 389 | case 0xd: // 384 cycle stopwatch timer\r |
| 390 | elprintf(EL_CDREGS|EL_CD, "s68k clear stopwatch (%x)", d);\r |
| 391 | // does this also reset internal 384 cycle counter?\r |
| 392 | Pico_mcd->m.stopwatch_base_c = SekCyclesDoneS68k();\r |
| 393 | return;\r |
| 394 | case 0x0e:\r |
| 395 | a = 0x0f;\r |
| 396 | case 0x0f:\r |
| 397 | goto write_comm;\r |
| 398 | case 0x31: // 384 cycle int3 timer\r |
| 399 | d &= 0xff;\r |
| 400 | elprintf(EL_CDREGS|EL_CD, "s68k set int3 timer: %02x", d);\r |
| 401 | Pico_mcd->s68k_regs[a] = (u8) d;\r |
| 402 | if (d) // d or d+1??\r |
| 403 | pcd_event_schedule_s68k(PCD_EVENT_TIMER3, d * 384);\r |
| 404 | else\r |
| 405 | pcd_event_schedule(0, PCD_EVENT_TIMER3, 0);\r |
| 406 | break;\r |
| 407 | case 0x33: // IRQ mask\r |
| 408 | elprintf(EL_CDREGS|EL_CD, "s68k irq mask: %02x", d);\r |
| 409 | d &= 0x7e;\r |
| 410 | if ((d ^ Pico_mcd->s68k_regs[0x33]) & d & PCDS_IEN4) {\r |
| 411 | if (Pico_mcd->s68k_regs[0x37] & 4)\r |
| 412 | CDD_Export_Status();\r |
| 413 | }\r |
| 414 | break;\r |
| 415 | case 0x34: // fader\r |
| 416 | Pico_mcd->s68k_regs[a] = (u8) d & 0x7f;\r |
| 417 | return;\r |
| 418 | case 0x36:\r |
| 419 | return; // d/m bit is unsetable\r |
| 420 | case 0x37: {\r |
| 421 | u32 d_old = Pico_mcd->s68k_regs[0x37];\r |
| 422 | Pico_mcd->s68k_regs[0x37] = d&7;\r |
| 423 | if ((d&4) && !(d_old&4)) {\r |
| 424 | CDD_Export_Status();\r |
| 425 | }\r |
| 426 | return;\r |
| 427 | }\r |
| 428 | case 0x4b:\r |
| 429 | Pico_mcd->s68k_regs[a] = (u8) d;\r |
| 430 | CDD_Import_Command();\r |
| 431 | return;\r |
| 432 | }\r |
| 433 | \r |
| 434 | if ((a&0x1f0) == 0x20)\r |
| 435 | goto write_comm;\r |
| 436 | \r |
| 437 | if ((a&0x1f0) == 0x10 || (a >= 0x38 && a < 0x42))\r |
| 438 | {\r |
| 439 | elprintf(EL_UIO, "s68k FIXME: invalid write @ %02x?", a);\r |
| 440 | return;\r |
| 441 | }\r |
| 442 | \r |
| 443 | Pico_mcd->s68k_regs[a] = (u8) d;\r |
| 444 | return;\r |
| 445 | \r |
| 446 | write_comm:\r |
| 447 | Pico_mcd->s68k_regs[a] = (u8) d;\r |
| 448 | if (Pico_mcd->m.m68k_poll_cnt)\r |
| 449 | SekEndRunS68k(0);\r |
| 450 | Pico_mcd->m.m68k_poll_cnt = 0;\r |
| 451 | }\r |
| 452 | \r |
| 453 | // -----------------------------------------------------------------\r |
| 454 | // Main 68k\r |
| 455 | // -----------------------------------------------------------------\r |
| 456 | \r |
| 457 | #ifndef _ASM_CD_MEMORY_C\r |
| 458 | #include "cell_map.c"\r |
| 459 | \r |
| 460 | // WORD RAM, cell aranged area (220000 - 23ffff)\r |
| 461 | static u32 PicoReadM68k8_cell0(u32 a)\r |
| 462 | {\r |
| 463 | a = (a&3) | (cell_map(a >> 2) << 2); // cell arranged\r |
| 464 | return Pico_mcd->word_ram1M[0][a ^ 1];\r |
| 465 | }\r |
| 466 | \r |
| 467 | static u32 PicoReadM68k8_cell1(u32 a)\r |
| 468 | {\r |
| 469 | a = (a&3) | (cell_map(a >> 2) << 2);\r |
| 470 | return Pico_mcd->word_ram1M[1][a ^ 1];\r |
| 471 | }\r |
| 472 | \r |
| 473 | static u32 PicoReadM68k16_cell0(u32 a)\r |
| 474 | {\r |
| 475 | a = (a&2) | (cell_map(a >> 2) << 2);\r |
| 476 | return *(u16 *)(Pico_mcd->word_ram1M[0] + a);\r |
| 477 | }\r |
| 478 | \r |
| 479 | static u32 PicoReadM68k16_cell1(u32 a)\r |
| 480 | {\r |
| 481 | a = (a&2) | (cell_map(a >> 2) << 2);\r |
| 482 | return *(u16 *)(Pico_mcd->word_ram1M[1] + a);\r |
| 483 | }\r |
| 484 | \r |
| 485 | static void PicoWriteM68k8_cell0(u32 a, u32 d)\r |
| 486 | {\r |
| 487 | a = (a&3) | (cell_map(a >> 2) << 2);\r |
| 488 | Pico_mcd->word_ram1M[0][a ^ 1] = d;\r |
| 489 | }\r |
| 490 | \r |
| 491 | static void PicoWriteM68k8_cell1(u32 a, u32 d)\r |
| 492 | {\r |
| 493 | a = (a&3) | (cell_map(a >> 2) << 2);\r |
| 494 | Pico_mcd->word_ram1M[1][a ^ 1] = d;\r |
| 495 | }\r |
| 496 | \r |
| 497 | static void PicoWriteM68k16_cell0(u32 a, u32 d)\r |
| 498 | {\r |
| 499 | a = (a&3) | (cell_map(a >> 2) << 2);\r |
| 500 | *(u16 *)(Pico_mcd->word_ram1M[0] + a) = d;\r |
| 501 | }\r |
| 502 | \r |
| 503 | static void PicoWriteM68k16_cell1(u32 a, u32 d)\r |
| 504 | {\r |
| 505 | a = (a&3) | (cell_map(a >> 2) << 2);\r |
| 506 | *(u16 *)(Pico_mcd->word_ram1M[1] + a) = d;\r |
| 507 | }\r |
| 508 | #endif\r |
| 509 | \r |
| 510 | // RAM cart (40000 - 7fffff, optional)\r |
| 511 | static u32 PicoReadM68k8_ramc(u32 a)\r |
| 512 | {\r |
| 513 | u32 d = 0;\r |
| 514 | if (a == 0x400001) {\r |
| 515 | if (SRam.data != NULL)\r |
| 516 | d = 3; // 64k cart\r |
| 517 | return d;\r |
| 518 | }\r |
| 519 | \r |
| 520 | if ((a & 0xfe0000) == 0x600000) {\r |
| 521 | if (SRam.data != NULL)\r |
| 522 | d = SRam.data[((a >> 1) & 0xffff) + 0x2000];\r |
| 523 | return d;\r |
| 524 | }\r |
| 525 | \r |
| 526 | if (a == 0x7fffff)\r |
| 527 | return Pico_mcd->m.bcram_reg;\r |
| 528 | \r |
| 529 | elprintf(EL_UIO, "m68k unmapped r8 [%06x] @%06x", a, SekPc);\r |
| 530 | return d;\r |
| 531 | }\r |
| 532 | \r |
| 533 | static u32 PicoReadM68k16_ramc(u32 a)\r |
| 534 | {\r |
| 535 | elprintf(EL_ANOMALY, "ramcart r16: [%06x] @%06x", a, SekPcS68k);\r |
| 536 | return PicoReadM68k8_ramc(a + 1);\r |
| 537 | }\r |
| 538 | \r |
| 539 | static void PicoWriteM68k8_ramc(u32 a, u32 d)\r |
| 540 | {\r |
| 541 | if ((a & 0xfe0000) == 0x600000) {\r |
| 542 | if (SRam.data != NULL && (Pico_mcd->m.bcram_reg & 1)) {\r |
| 543 | SRam.data[((a>>1) & 0xffff) + 0x2000] = d;\r |
| 544 | SRam.changed = 1;\r |
| 545 | }\r |
| 546 | return;\r |
| 547 | }\r |
| 548 | \r |
| 549 | if (a == 0x7fffff) {\r |
| 550 | Pico_mcd->m.bcram_reg = d;\r |
| 551 | return;\r |
| 552 | }\r |
| 553 | \r |
| 554 | elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x",\r |
| 555 | a, d & 0xff, SekPc);\r |
| 556 | }\r |
| 557 | \r |
| 558 | static void PicoWriteM68k16_ramc(u32 a, u32 d)\r |
| 559 | {\r |
| 560 | elprintf(EL_ANOMALY, "ramcart w16: [%06x] %04x @%06x",\r |
| 561 | a, d, SekPcS68k);\r |
| 562 | PicoWriteM68k8_ramc(a + 1, d);\r |
| 563 | }\r |
| 564 | \r |
| 565 | // IO/control/cd registers (a10000 - ...)\r |
| 566 | #ifndef _ASM_CD_MEMORY_C\r |
| 567 | u32 PicoRead8_mcd_io(u32 a)\r |
| 568 | {\r |
| 569 | u32 d;\r |
| 570 | if ((a & 0xff00) == 0x2000) { // a12000 - a120ff\r |
| 571 | d = m68k_reg_read16(a); // TODO: m68k_reg_read8\r |
| 572 | if (!(a & 1))\r |
| 573 | d >>= 8;\r |
| 574 | d &= 0xff;\r |
| 575 | elprintf(EL_CDREGS, "m68k_regs r8: [%02x] %02x @%06x",\r |
| 576 | a & 0x3f, d, SekPc);\r |
| 577 | return d;\r |
| 578 | }\r |
| 579 | \r |
| 580 | // fallback to default MD handler\r |
| 581 | return PicoRead8_io(a);\r |
| 582 | }\r |
| 583 | \r |
| 584 | u32 PicoRead16_mcd_io(u32 a)\r |
| 585 | {\r |
| 586 | u32 d;\r |
| 587 | if ((a & 0xff00) == 0x2000) {\r |
| 588 | d = m68k_reg_read16(a);\r |
| 589 | elprintf(EL_CDREGS, "m68k_regs r16: [%02x] %04x @%06x",\r |
| 590 | a & 0x3f, d, SekPc);\r |
| 591 | return d;\r |
| 592 | }\r |
| 593 | \r |
| 594 | return PicoRead16_io(a);\r |
| 595 | }\r |
| 596 | \r |
| 597 | void PicoWrite8_mcd_io(u32 a, u32 d)\r |
| 598 | {\r |
| 599 | if ((a & 0xff00) == 0x2000) { // a12000 - a120ff\r |
| 600 | elprintf(EL_CDREGS, "m68k_regs w8: [%02x] %02x @%06x",\r |
| 601 | a & 0x3f, d, SekPc);\r |
| 602 | m68k_reg_write8(a, d);\r |
| 603 | return;\r |
| 604 | }\r |
| 605 | \r |
| 606 | PicoWrite16_io(a, d);\r |
| 607 | }\r |
| 608 | \r |
| 609 | void PicoWrite16_mcd_io(u32 a, u32 d)\r |
| 610 | {\r |
| 611 | if ((a & 0xff00) == 0x2000) { // a12000 - a120ff\r |
| 612 | elprintf(EL_CDREGS, "m68k_regs w16: [%02x] %04x @%06x",\r |
| 613 | a & 0x3f, d, SekPc);\r |
| 614 | \r |
| 615 | m68k_reg_write8(a, d >> 8);\r |
| 616 | if ((a & 0x3e) != 0x0e) // special case\r |
| 617 | m68k_reg_write8(a + 1, d & 0xff);\r |
| 618 | return;\r |
| 619 | }\r |
| 620 | \r |
| 621 | PicoWrite16_io(a, d);\r |
| 622 | }\r |
| 623 | #endif\r |
| 624 | \r |
| 625 | // -----------------------------------------------------------------\r |
| 626 | // Sub 68k\r |
| 627 | // -----------------------------------------------------------------\r |
| 628 | \r |
| 629 | static u32 s68k_unmapped_read8(u32 a)\r |
| 630 | {\r |
| 631 | elprintf(EL_UIO, "s68k unmapped r8 [%06x] @%06x", a, SekPc);\r |
| 632 | return 0;\r |
| 633 | }\r |
| 634 | \r |
| 635 | static u32 s68k_unmapped_read16(u32 a)\r |
| 636 | {\r |
| 637 | elprintf(EL_UIO, "s68k unmapped r16 [%06x] @%06x", a, SekPc);\r |
| 638 | return 0;\r |
| 639 | }\r |
| 640 | \r |
| 641 | static void s68k_unmapped_write8(u32 a, u32 d)\r |
| 642 | {\r |
| 643 | elprintf(EL_UIO, "s68k unmapped w8 [%06x] %02x @%06x",\r |
| 644 | a, d & 0xff, SekPc);\r |
| 645 | }\r |
| 646 | \r |
| 647 | static void s68k_unmapped_write16(u32 a, u32 d)\r |
| 648 | {\r |
| 649 | elprintf(EL_UIO, "s68k unmapped w16 [%06x] %04x @%06x",\r |
| 650 | a, d & 0xffff, SekPc);\r |
| 651 | }\r |
| 652 | \r |
| 653 | // PRG RAM protected range (000000 - 01fdff)?\r |
| 654 | // XXX verify: ff00 or 1fe00 max?\r |
| 655 | static void PicoWriteS68k8_prgwp(u32 a, u32 d)\r |
| 656 | {\r |
| 657 | if (a >= (Pico_mcd->s68k_regs[2] << 9))\r |
| 658 | Pico_mcd->prg_ram[a ^ 1] = d;\r |
| 659 | }\r |
| 660 | \r |
| 661 | static void PicoWriteS68k16_prgwp(u32 a, u32 d)\r |
| 662 | {\r |
| 663 | if (a >= (Pico_mcd->s68k_regs[2] << 9))\r |
| 664 | *(u16 *)(Pico_mcd->prg_ram + a) = d;\r |
| 665 | }\r |
| 666 | \r |
| 667 | #ifndef _ASM_CD_MEMORY_C\r |
| 668 | \r |
| 669 | // decode (080000 - 0bffff, in 1M mode)\r |
| 670 | static u32 PicoReadS68k8_dec0(u32 a)\r |
| 671 | {\r |
| 672 | u32 d = Pico_mcd->word_ram1M[0][((a >> 1) ^ 1) & 0x1ffff];\r |
| 673 | if (a & 1)\r |
| 674 | d &= 0x0f;\r |
| 675 | else\r |
| 676 | d >>= 4;\r |
| 677 | return d;\r |
| 678 | }\r |
| 679 | \r |
| 680 | static u32 PicoReadS68k8_dec1(u32 a)\r |
| 681 | {\r |
| 682 | u32 d = Pico_mcd->word_ram1M[1][((a >> 1) ^ 1) & 0x1ffff];\r |
| 683 | if (a & 1)\r |
| 684 | d &= 0x0f;\r |
| 685 | else\r |
| 686 | d >>= 4;\r |
| 687 | return d;\r |
| 688 | }\r |
| 689 | \r |
| 690 | static u32 PicoReadS68k16_dec0(u32 a)\r |
| 691 | {\r |
| 692 | u32 d = Pico_mcd->word_ram1M[0][((a >> 1) ^ 1) & 0x1ffff];\r |
| 693 | d |= d << 4;\r |
| 694 | d &= ~0xf0;\r |
| 695 | return d;\r |
| 696 | }\r |
| 697 | \r |
| 698 | static u32 PicoReadS68k16_dec1(u32 a)\r |
| 699 | {\r |
| 700 | u32 d = Pico_mcd->word_ram1M[1][((a >> 1) ^ 1) & 0x1ffff];\r |
| 701 | d |= d << 4;\r |
| 702 | d &= ~0xf0;\r |
| 703 | return d;\r |
| 704 | }\r |
| 705 | \r |
| 706 | /* check: jaguar xj 220 (draws entire world using decode) */\r |
| 707 | #define mk_decode_w8(bank) \\r |
| 708 | static void PicoWriteS68k8_dec_m0b##bank(u32 a, u32 d) \\r |
| 709 | { \\r |
| 710 | u8 *pd = &Pico_mcd->word_ram1M[bank][((a >> 1) ^ 1) & 0x1ffff]; \\r |
| 711 | \\r |
| 712 | if (!(a & 1)) \\r |
| 713 | *pd = (*pd & 0x0f) | (d << 4); \\r |
| 714 | else \\r |
| 715 | *pd = (*pd & 0xf0) | (d & 0x0f); \\r |
| 716 | } \\r |
| 717 | \\r |
| 718 | static void PicoWriteS68k8_dec_m1b##bank(u32 a, u32 d) \\r |
| 719 | { \\r |
| 720 | u8 *pd = &Pico_mcd->word_ram1M[bank][((a >> 1) ^ 1) & 0x1ffff]; \\r |
| 721 | u8 mask = (a & 1) ? 0x0f : 0xf0; \\r |
| 722 | \\r |
| 723 | if (!(*pd & mask) && (d & 0x0f)) /* underwrite */ \\r |
| 724 | PicoWriteS68k8_dec_m0b##bank(a, d); \\r |
| 725 | } \\r |
| 726 | \\r |
| 727 | static void PicoWriteS68k8_dec_m2b##bank(u32 a, u32 d) /* ...and m3? */ \\r |
| 728 | { \\r |
| 729 | if (d & 0x0f) /* overwrite */ \\r |
| 730 | PicoWriteS68k8_dec_m0b##bank(a, d); \\r |
| 731 | }\r |
| 732 | \r |
| 733 | mk_decode_w8(0)\r |
| 734 | mk_decode_w8(1)\r |
| 735 | \r |
| 736 | #define mk_decode_w16(bank) \\r |
| 737 | static void PicoWriteS68k16_dec_m0b##bank(u32 a, u32 d) \\r |
| 738 | { \\r |
| 739 | u8 *pd = &Pico_mcd->word_ram1M[bank][((a >> 1) ^ 1) & 0x1ffff]; \\r |
| 740 | \\r |
| 741 | d &= 0x0f0f; \\r |
| 742 | *pd = d | (d >> 4); \\r |
| 743 | } \\r |
| 744 | \\r |
| 745 | static void PicoWriteS68k16_dec_m1b##bank(u32 a, u32 d) \\r |
| 746 | { \\r |
| 747 | u8 *pd = &Pico_mcd->word_ram1M[bank][((a >> 1) ^ 1) & 0x1ffff]; \\r |
| 748 | \\r |
| 749 | d &= 0x0f0f; /* underwrite */ \\r |
| 750 | if (!(*pd & 0xf0)) *pd |= d >> 4; \\r |
| 751 | if (!(*pd & 0x0f)) *pd |= d; \\r |
| 752 | } \\r |
| 753 | \\r |
| 754 | static void PicoWriteS68k16_dec_m2b##bank(u32 a, u32 d) \\r |
| 755 | { \\r |
| 756 | u8 *pd = &Pico_mcd->word_ram1M[bank][((a >> 1) ^ 1) & 0x1ffff]; \\r |
| 757 | \\r |
| 758 | d &= 0x0f0f; /* overwrite */ \\r |
| 759 | d |= d >> 4; \\r |
| 760 | \\r |
| 761 | if (!(d & 0xf0)) d |= *pd & 0xf0; \\r |
| 762 | if (!(d & 0x0f)) d |= *pd & 0x0f; \\r |
| 763 | *pd = d; \\r |
| 764 | }\r |
| 765 | \r |
| 766 | mk_decode_w16(0)\r |
| 767 | mk_decode_w16(1)\r |
| 768 | \r |
| 769 | #endif\r |
| 770 | \r |
| 771 | // backup RAM (fe0000 - feffff)\r |
| 772 | static u32 PicoReadS68k8_bram(u32 a)\r |
| 773 | {\r |
| 774 | return Pico_mcd->bram[(a>>1)&0x1fff];\r |
| 775 | }\r |
| 776 | \r |
| 777 | static u32 PicoReadS68k16_bram(u32 a)\r |
| 778 | {\r |
| 779 | u32 d;\r |
| 780 | elprintf(EL_ANOMALY, "FIXME: s68k_bram r16: [%06x] @%06x", a, SekPcS68k);\r |
| 781 | a = (a >> 1) & 0x1fff;\r |
| 782 | d = Pico_mcd->bram[a++];\r |
| 783 | d|= Pico_mcd->bram[a++] << 8; // probably wrong, TODO: verify\r |
| 784 | return d;\r |
| 785 | }\r |
| 786 | \r |
| 787 | static void PicoWriteS68k8_bram(u32 a, u32 d)\r |
| 788 | {\r |
| 789 | Pico_mcd->bram[(a >> 1) & 0x1fff] = d;\r |
| 790 | SRam.changed = 1;\r |
| 791 | }\r |
| 792 | \r |
| 793 | static void PicoWriteS68k16_bram(u32 a, u32 d)\r |
| 794 | {\r |
| 795 | elprintf(EL_ANOMALY, "s68k_bram w16: [%06x] %04x @%06x", a, d, SekPcS68k);\r |
| 796 | a = (a >> 1) & 0x1fff;\r |
| 797 | Pico_mcd->bram[a++] = d;\r |
| 798 | Pico_mcd->bram[a++] = d >> 8; // TODO: verify..\r |
| 799 | SRam.changed = 1;\r |
| 800 | }\r |
| 801 | \r |
| 802 | #ifndef _ASM_CD_MEMORY_C\r |
| 803 | \r |
| 804 | // PCM and registers (ff0000 - ffffff)\r |
| 805 | static u32 PicoReadS68k8_pr(u32 a)\r |
| 806 | {\r |
| 807 | u32 d = 0;\r |
| 808 | \r |
| 809 | // regs\r |
| 810 | if ((a & 0xfe00) == 0x8000) {\r |
| 811 | a &= 0x1ff;\r |
| 812 | if (a >= 0x0e && a < 0x30) {\r |
| 813 | d = Pico_mcd->s68k_regs[a];\r |
| 814 | s68k_poll_detect(a & ~1, d);\r |
| 815 | goto regs_done;\r |
| 816 | }\r |
| 817 | else if (a >= 0x58 && a < 0x68)\r |
| 818 | d = gfx_cd_read(a & ~1);\r |
| 819 | else d = s68k_reg_read16(a & ~1);\r |
| 820 | if (!(a & 1))\r |
| 821 | d >>= 8;\r |
| 822 | \r |
| 823 | regs_done:\r |
| 824 | d &= 0xff;\r |
| 825 | elprintf(EL_CDREGS, "s68k_regs r8: [%02x] %02x @%06x",\r |
| 826 | a, d, SekPcS68k);\r |
| 827 | return d;\r |
| 828 | }\r |
| 829 | \r |
| 830 | // PCM\r |
| 831 | // XXX: verify: probably odd addrs only?\r |
| 832 | if ((a & 0x8000) == 0x0000) {\r |
| 833 | a &= 0x7fff;\r |
| 834 | if (a >= 0x2000)\r |
| 835 | d = Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a >> 1) & 0xfff];\r |
| 836 | else if (a >= 0x20)\r |
| 837 | d = pcd_pcm_read(a >> 1);\r |
| 838 | \r |
| 839 | return d;\r |
| 840 | }\r |
| 841 | \r |
| 842 | return s68k_unmapped_read8(a);\r |
| 843 | }\r |
| 844 | \r |
| 845 | static u32 PicoReadS68k16_pr(u32 a)\r |
| 846 | {\r |
| 847 | u32 d = 0;\r |
| 848 | \r |
| 849 | // regs\r |
| 850 | if ((a & 0xfe00) == 0x8000) {\r |
| 851 | a &= 0x1fe;\r |
| 852 | if (0x58 <= a && a < 0x68)\r |
| 853 | d = gfx_cd_read(a);\r |
| 854 | else d = s68k_reg_read16(a);\r |
| 855 | \r |
| 856 | elprintf(EL_CDREGS, "s68k_regs r16: [%02x] %04x @%06x",\r |
| 857 | a, d, SekPcS68k);\r |
| 858 | return d;\r |
| 859 | }\r |
| 860 | \r |
| 861 | // PCM\r |
| 862 | if ((a & 0x8000) == 0x0000) {\r |
| 863 | a &= 0x7fff;\r |
| 864 | if (a >= 0x2000)\r |
| 865 | d = Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a >> 1) & 0xfff];\r |
| 866 | else if (a >= 0x20)\r |
| 867 | d = pcd_pcm_read(a >> 1);\r |
| 868 | \r |
| 869 | return d;\r |
| 870 | }\r |
| 871 | \r |
| 872 | return s68k_unmapped_read16(a);\r |
| 873 | }\r |
| 874 | \r |
| 875 | static void PicoWriteS68k8_pr(u32 a, u32 d)\r |
| 876 | {\r |
| 877 | // regs\r |
| 878 | if ((a & 0xfe00) == 0x8000) {\r |
| 879 | a &= 0x1ff;\r |
| 880 | elprintf(EL_CDREGS, "s68k_regs w8: [%02x] %02x @%06x", a, d, SekPcS68k);\r |
| 881 | if (0x58 <= a && a < 0x68)\r |
| 882 | gfx_cd_write16(a&~1, (d<<8)|d);\r |
| 883 | else s68k_reg_write8(a,d);\r |
| 884 | return;\r |
| 885 | }\r |
| 886 | \r |
| 887 | // PCM\r |
| 888 | if ((a & 0x8000) == 0x0000) {\r |
| 889 | a &= 0x7fff;\r |
| 890 | if (a >= 0x2000)\r |
| 891 | Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a>>1)&0xfff] = d;\r |
| 892 | else if (a < 0x12)\r |
| 893 | pcd_pcm_write(a>>1, d);\r |
| 894 | return;\r |
| 895 | }\r |
| 896 | \r |
| 897 | s68k_unmapped_write8(a, d);\r |
| 898 | }\r |
| 899 | \r |
| 900 | static void PicoWriteS68k16_pr(u32 a, u32 d)\r |
| 901 | {\r |
| 902 | // regs\r |
| 903 | if ((a & 0xfe00) == 0x8000) {\r |
| 904 | a &= 0x1fe;\r |
| 905 | elprintf(EL_CDREGS, "s68k_regs w16: [%02x] %04x @%06x", a, d, SekPcS68k);\r |
| 906 | if (a >= 0x58 && a < 0x68)\r |
| 907 | gfx_cd_write16(a, d);\r |
| 908 | else {\r |
| 909 | if (a == 0xe) {\r |
| 910 | // special case, 2 byte writes would be handled differently\r |
| 911 | // TODO: verify\r |
| 912 | Pico_mcd->s68k_regs[0xf] = d;\r |
| 913 | return;\r |
| 914 | }\r |
| 915 | s68k_reg_write8(a, d >> 8);\r |
| 916 | s68k_reg_write8(a + 1, d & 0xff);\r |
| 917 | }\r |
| 918 | return;\r |
| 919 | }\r |
| 920 | \r |
| 921 | // PCM\r |
| 922 | if ((a & 0x8000) == 0x0000) {\r |
| 923 | a &= 0x7fff;\r |
| 924 | if (a >= 0x2000)\r |
| 925 | Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a>>1)&0xfff] = d;\r |
| 926 | else if (a < 0x12)\r |
| 927 | pcd_pcm_write(a>>1, d & 0xff);\r |
| 928 | return;\r |
| 929 | }\r |
| 930 | \r |
| 931 | s68k_unmapped_write16(a, d);\r |
| 932 | }\r |
| 933 | \r |
| 934 | #endif\r |
| 935 | \r |
| 936 | static const void *m68k_cell_read8[] = { PicoReadM68k8_cell0, PicoReadM68k8_cell1 };\r |
| 937 | static const void *m68k_cell_read16[] = { PicoReadM68k16_cell0, PicoReadM68k16_cell1 };\r |
| 938 | static const void *m68k_cell_write8[] = { PicoWriteM68k8_cell0, PicoWriteM68k8_cell1 };\r |
| 939 | static const void *m68k_cell_write16[] = { PicoWriteM68k16_cell0, PicoWriteM68k16_cell1 };\r |
| 940 | \r |
| 941 | static const void *s68k_dec_read8[] = { PicoReadS68k8_dec0, PicoReadS68k8_dec1 };\r |
| 942 | static const void *s68k_dec_read16[] = { PicoReadS68k16_dec0, PicoReadS68k16_dec1 };\r |
| 943 | \r |
| 944 | static const void *s68k_dec_write8[2][4] = {\r |
| 945 | { PicoWriteS68k8_dec_m0b0, PicoWriteS68k8_dec_m1b0, PicoWriteS68k8_dec_m2b0, PicoWriteS68k8_dec_m2b0 },\r |
| 946 | { PicoWriteS68k8_dec_m0b1, PicoWriteS68k8_dec_m1b1, PicoWriteS68k8_dec_m2b1, PicoWriteS68k8_dec_m2b1 },\r |
| 947 | };\r |
| 948 | \r |
| 949 | static const void *s68k_dec_write16[2][4] = {\r |
| 950 | { PicoWriteS68k16_dec_m0b0, PicoWriteS68k16_dec_m1b0, PicoWriteS68k16_dec_m2b0, PicoWriteS68k16_dec_m2b0 },\r |
| 951 | { PicoWriteS68k16_dec_m0b1, PicoWriteS68k16_dec_m1b1, PicoWriteS68k16_dec_m2b1, PicoWriteS68k16_dec_m2b1 },\r |
| 952 | };\r |
| 953 | \r |
| 954 | // -----------------------------------------------------------------\r |
| 955 | \r |
| 956 | static void remap_prg_window(u32 r1, u32 r3)\r |
| 957 | {\r |
| 958 | // PRG RAM\r |
| 959 | if (r1 & 2) {\r |
| 960 | void *bank = Pico_mcd->prg_ram_b[(r3 >> 6) & 3];\r |
| 961 | cpu68k_map_all_ram(0x020000, 0x03ffff, bank, 0);\r |
| 962 | }\r |
| 963 | else {\r |
| 964 | m68k_map_unmap(0x020000, 0x03ffff);\r |
| 965 | }\r |
| 966 | }\r |
| 967 | \r |
| 968 | static void remap_word_ram(u32 r3)\r |
| 969 | {\r |
| 970 | void *bank;\r |
| 971 | \r |
| 972 | // WORD RAM\r |
| 973 | if (!(r3 & 4)) {\r |
| 974 | // 2M mode. XXX: allowing access in all cases for simplicity\r |
| 975 | bank = Pico_mcd->word_ram2M;\r |
| 976 | cpu68k_map_all_ram(0x200000, 0x23ffff, bank, 0);\r |
| 977 | cpu68k_map_all_ram(0x080000, 0x0bffff, bank, 1);\r |
| 978 | // TODO: handle 0x0c0000\r |
| 979 | }\r |
| 980 | else {\r |
| 981 | int b0 = r3 & 1;\r |
| 982 | int m = (r3 & 0x18) >> 3;\r |
| 983 | bank = Pico_mcd->word_ram1M[b0];\r |
| 984 | cpu68k_map_all_ram(0x200000, 0x21ffff, bank, 0);\r |
| 985 | bank = Pico_mcd->word_ram1M[b0 ^ 1];\r |
| 986 | cpu68k_map_all_ram(0x0c0000, 0x0effff, bank, 1);\r |
| 987 | // "cell arrange" on m68k\r |
| 988 | cpu68k_map_set(m68k_read8_map, 0x220000, 0x23ffff, m68k_cell_read8[b0], 1);\r |
| 989 | cpu68k_map_set(m68k_read16_map, 0x220000, 0x23ffff, m68k_cell_read16[b0], 1);\r |
| 990 | cpu68k_map_set(m68k_write8_map, 0x220000, 0x23ffff, m68k_cell_write8[b0], 1);\r |
| 991 | cpu68k_map_set(m68k_write16_map, 0x220000, 0x23ffff, m68k_cell_write16[b0], 1);\r |
| 992 | // "decode format" on s68k\r |
| 993 | cpu68k_map_set(s68k_read8_map, 0x080000, 0x0bffff, s68k_dec_read8[b0 ^ 1], 1);\r |
| 994 | cpu68k_map_set(s68k_read16_map, 0x080000, 0x0bffff, s68k_dec_read16[b0 ^ 1], 1);\r |
| 995 | cpu68k_map_set(s68k_write8_map, 0x080000, 0x0bffff, s68k_dec_write8[b0 ^ 1][m], 1);\r |
| 996 | cpu68k_map_set(s68k_write16_map, 0x080000, 0x0bffff, s68k_dec_write16[b0 ^ 1][m], 1);\r |
| 997 | }\r |
| 998 | \r |
| 999 | #ifdef EMU_F68K\r |
| 1000 | // update fetchmap..\r |
| 1001 | int i;\r |
| 1002 | if (!(r3 & 4))\r |
| 1003 | {\r |
| 1004 | for (i = M68K_FETCHBANK1*2/16; (i<<(24-FAMEC_FETCHBITS)) < 0x240000; i++)\r |
| 1005 | PicoCpuFM68k.Fetch[i] = (unsigned long)Pico_mcd->word_ram2M - 0x200000;\r |
| 1006 | }\r |
| 1007 | else\r |
| 1008 | {\r |
| 1009 | for (i = M68K_FETCHBANK1*2/16; (i<<(24-FAMEC_FETCHBITS)) < 0x220000; i++)\r |
| 1010 | PicoCpuFM68k.Fetch[i] = (unsigned long)Pico_mcd->word_ram1M[r3 & 1] - 0x200000;\r |
| 1011 | for (i = M68K_FETCHBANK1*0x0c/0x100; (i<<(24-FAMEC_FETCHBITS)) < 0x0e0000; i++)\r |
| 1012 | PicoCpuFS68k.Fetch[i] = (unsigned long)Pico_mcd->word_ram1M[(r3&1)^1] - 0x0c0000;\r |
| 1013 | }\r |
| 1014 | #endif\r |
| 1015 | }\r |
| 1016 | \r |
| 1017 | void pcd_state_loaded_mem(void)\r |
| 1018 | {\r |
| 1019 | u32 r3 = Pico_mcd->s68k_regs[3];\r |
| 1020 | \r |
| 1021 | /* after load events */\r |
| 1022 | if (r3 & 4) // 1M mode?\r |
| 1023 | wram_2M_to_1M(Pico_mcd->word_ram2M);\r |
| 1024 | remap_word_ram(r3);\r |
| 1025 | remap_prg_window(Pico_mcd->m.busreq, r3);\r |
| 1026 | Pico_mcd->m.dmna_ret_2m &= 3;\r |
| 1027 | \r |
| 1028 | // restore hint vector\r |
| 1029 | *(unsigned short *)(Pico_mcd->bios + 0x72) = Pico_mcd->m.hint_vector;\r |
| 1030 | }\r |
| 1031 | \r |
| 1032 | #ifdef EMU_M68K\r |
| 1033 | static void m68k_mem_setup_cd(void);\r |
| 1034 | #endif\r |
| 1035 | \r |
| 1036 | PICO_INTERNAL void PicoMemSetupCD(void)\r |
| 1037 | {\r |
| 1038 | // setup default main68k map\r |
| 1039 | PicoMemSetup();\r |
| 1040 | \r |
| 1041 | // main68k map (BIOS mapped by PicoMemSetup()):\r |
| 1042 | // RAM cart\r |
| 1043 | if (PicoOpt & POPT_EN_MCD_RAMCART) {\r |
| 1044 | cpu68k_map_set(m68k_read8_map, 0x400000, 0x7fffff, PicoReadM68k8_ramc, 1);\r |
| 1045 | cpu68k_map_set(m68k_read16_map, 0x400000, 0x7fffff, PicoReadM68k16_ramc, 1);\r |
| 1046 | cpu68k_map_set(m68k_write8_map, 0x400000, 0x7fffff, PicoWriteM68k8_ramc, 1);\r |
| 1047 | cpu68k_map_set(m68k_write16_map, 0x400000, 0x7fffff, PicoWriteM68k16_ramc, 1);\r |
| 1048 | }\r |
| 1049 | \r |
| 1050 | // registers/IO:\r |
| 1051 | cpu68k_map_set(m68k_read8_map, 0xa10000, 0xa1ffff, PicoRead8_mcd_io, 1);\r |
| 1052 | cpu68k_map_set(m68k_read16_map, 0xa10000, 0xa1ffff, PicoRead16_mcd_io, 1);\r |
| 1053 | cpu68k_map_set(m68k_write8_map, 0xa10000, 0xa1ffff, PicoWrite8_mcd_io, 1);\r |
| 1054 | cpu68k_map_set(m68k_write16_map, 0xa10000, 0xa1ffff, PicoWrite16_mcd_io, 1);\r |
| 1055 | \r |
| 1056 | // sub68k map\r |
| 1057 | cpu68k_map_set(s68k_read8_map, 0x000000, 0xffffff, s68k_unmapped_read8, 1);\r |
| 1058 | cpu68k_map_set(s68k_read16_map, 0x000000, 0xffffff, s68k_unmapped_read16, 1);\r |
| 1059 | cpu68k_map_set(s68k_write8_map, 0x000000, 0xffffff, s68k_unmapped_write8, 1);\r |
| 1060 | cpu68k_map_set(s68k_write16_map, 0x000000, 0xffffff, s68k_unmapped_write16, 1);\r |
| 1061 | \r |
| 1062 | // PRG RAM\r |
| 1063 | cpu68k_map_set(s68k_read8_map, 0x000000, 0x07ffff, Pico_mcd->prg_ram, 0);\r |
| 1064 | cpu68k_map_set(s68k_read16_map, 0x000000, 0x07ffff, Pico_mcd->prg_ram, 0);\r |
| 1065 | cpu68k_map_set(s68k_write8_map, 0x000000, 0x07ffff, Pico_mcd->prg_ram, 0);\r |
| 1066 | cpu68k_map_set(s68k_write16_map, 0x000000, 0x07ffff, Pico_mcd->prg_ram, 0);\r |
| 1067 | cpu68k_map_set(s68k_write8_map, 0x000000, 0x01ffff, PicoWriteS68k8_prgwp, 1);\r |
| 1068 | cpu68k_map_set(s68k_write16_map, 0x000000, 0x01ffff, PicoWriteS68k16_prgwp, 1);\r |
| 1069 | \r |
| 1070 | // BRAM\r |
| 1071 | cpu68k_map_set(s68k_read8_map, 0xfe0000, 0xfeffff, PicoReadS68k8_bram, 1);\r |
| 1072 | cpu68k_map_set(s68k_read16_map, 0xfe0000, 0xfeffff, PicoReadS68k16_bram, 1);\r |
| 1073 | cpu68k_map_set(s68k_write8_map, 0xfe0000, 0xfeffff, PicoWriteS68k8_bram, 1);\r |
| 1074 | cpu68k_map_set(s68k_write16_map, 0xfe0000, 0xfeffff, PicoWriteS68k16_bram, 1);\r |
| 1075 | \r |
| 1076 | // PCM, regs\r |
| 1077 | cpu68k_map_set(s68k_read8_map, 0xff0000, 0xffffff, PicoReadS68k8_pr, 1);\r |
| 1078 | cpu68k_map_set(s68k_read16_map, 0xff0000, 0xffffff, PicoReadS68k16_pr, 1);\r |
| 1079 | cpu68k_map_set(s68k_write8_map, 0xff0000, 0xffffff, PicoWriteS68k8_pr, 1);\r |
| 1080 | cpu68k_map_set(s68k_write16_map, 0xff0000, 0xffffff, PicoWriteS68k16_pr, 1);\r |
| 1081 | \r |
| 1082 | // RAMs\r |
| 1083 | remap_word_ram(1);\r |
| 1084 | \r |
| 1085 | #ifdef EMU_C68K\r |
| 1086 | // s68k\r |
| 1087 | PicoCpuCS68k.read8 = (void *)s68k_read8_map;\r |
| 1088 | PicoCpuCS68k.read16 = (void *)s68k_read16_map;\r |
| 1089 | PicoCpuCS68k.read32 = (void *)s68k_read16_map;\r |
| 1090 | PicoCpuCS68k.write8 = (void *)s68k_write8_map;\r |
| 1091 | PicoCpuCS68k.write16 = (void *)s68k_write16_map;\r |
| 1092 | PicoCpuCS68k.write32 = (void *)s68k_write16_map;\r |
| 1093 | PicoCpuCS68k.checkpc = NULL; /* unused */\r |
| 1094 | PicoCpuCS68k.fetch8 = NULL;\r |
| 1095 | PicoCpuCS68k.fetch16 = NULL;\r |
| 1096 | PicoCpuCS68k.fetch32 = NULL;\r |
| 1097 | #endif\r |
| 1098 | #ifdef EMU_F68K\r |
| 1099 | // s68k\r |
| 1100 | PicoCpuFS68k.read_byte = s68k_read8;\r |
| 1101 | PicoCpuFS68k.read_word = s68k_read16;\r |
| 1102 | PicoCpuFS68k.read_long = s68k_read32;\r |
| 1103 | PicoCpuFS68k.write_byte = s68k_write8;\r |
| 1104 | PicoCpuFS68k.write_word = s68k_write16;\r |
| 1105 | PicoCpuFS68k.write_long = s68k_write32;\r |
| 1106 | \r |
| 1107 | // setup FAME fetchmap\r |
| 1108 | {\r |
| 1109 | int i;\r |
| 1110 | // M68k\r |
| 1111 | // by default, point everything to fitst 64k of ROM (BIOS)\r |
| 1112 | for (i = 0; i < M68K_FETCHBANK1; i++)\r |
| 1113 | PicoCpuFM68k.Fetch[i] = (unsigned long)Pico.rom - (i<<(24-FAMEC_FETCHBITS));\r |
| 1114 | // now real ROM (BIOS)\r |
| 1115 | for (i = 0; i < M68K_FETCHBANK1 && (i<<(24-FAMEC_FETCHBITS)) < Pico.romsize; i++)\r |
| 1116 | PicoCpuFM68k.Fetch[i] = (unsigned long)Pico.rom;\r |
| 1117 | // .. and RAM\r |
| 1118 | for (i = M68K_FETCHBANK1*14/16; i < M68K_FETCHBANK1; i++)\r |
| 1119 | PicoCpuFM68k.Fetch[i] = (unsigned long)Pico.ram - (i<<(24-FAMEC_FETCHBITS));\r |
| 1120 | // S68k\r |
| 1121 | // PRG RAM is default\r |
| 1122 | for (i = 0; i < M68K_FETCHBANK1; i++)\r |
| 1123 | PicoCpuFS68k.Fetch[i] = (unsigned long)Pico_mcd->prg_ram - (i<<(24-FAMEC_FETCHBITS));\r |
| 1124 | // real PRG RAM\r |
| 1125 | for (i = 0; i < M68K_FETCHBANK1 && (i<<(24-FAMEC_FETCHBITS)) < 0x80000; i++)\r |
| 1126 | PicoCpuFS68k.Fetch[i] = (unsigned long)Pico_mcd->prg_ram;\r |
| 1127 | // WORD RAM 2M area\r |
| 1128 | for (i = M68K_FETCHBANK1*0x08/0x100; i < M68K_FETCHBANK1 && (i<<(24-FAMEC_FETCHBITS)) < 0xc0000; i++)\r |
| 1129 | PicoCpuFS68k.Fetch[i] = (unsigned long)Pico_mcd->word_ram2M - 0x80000;\r |
| 1130 | // remap_word_ram() will setup word ram for both\r |
| 1131 | }\r |
| 1132 | #endif\r |
| 1133 | #ifdef EMU_M68K\r |
| 1134 | m68k_mem_setup_cd();\r |
| 1135 | #endif\r |
| 1136 | }\r |
| 1137 | \r |
| 1138 | \r |
| 1139 | #ifdef EMU_M68K\r |
| 1140 | u32 m68k_read8(u32 a);\r |
| 1141 | u32 m68k_read16(u32 a);\r |
| 1142 | u32 m68k_read32(u32 a);\r |
| 1143 | void m68k_write8(u32 a, u8 d);\r |
| 1144 | void m68k_write16(u32 a, u16 d);\r |
| 1145 | void m68k_write32(u32 a, u32 d);\r |
| 1146 | \r |
| 1147 | static unsigned int PicoReadCD8w (unsigned int a) {\r |
| 1148 | return m68ki_cpu_p == &PicoCpuMS68k ? s68k_read8(a) : m68k_read8(a);\r |
| 1149 | }\r |
| 1150 | static unsigned int PicoReadCD16w(unsigned int a) {\r |
| 1151 | return m68ki_cpu_p == &PicoCpuMS68k ? s68k_read16(a) : m68k_read16(a);\r |
| 1152 | }\r |
| 1153 | static unsigned int PicoReadCD32w(unsigned int a) {\r |
| 1154 | return m68ki_cpu_p == &PicoCpuMS68k ? s68k_read32(a) : m68k_read32(a);\r |
| 1155 | }\r |
| 1156 | static void PicoWriteCD8w (unsigned int a, unsigned char d) {\r |
| 1157 | if (m68ki_cpu_p == &PicoCpuMS68k) s68k_write8(a, d); else m68k_write8(a, d);\r |
| 1158 | }\r |
| 1159 | static void PicoWriteCD16w(unsigned int a, unsigned short d) {\r |
| 1160 | if (m68ki_cpu_p == &PicoCpuMS68k) s68k_write16(a, d); else m68k_write16(a, d);\r |
| 1161 | }\r |
| 1162 | static void PicoWriteCD32w(unsigned int a, unsigned int d) {\r |
| 1163 | if (m68ki_cpu_p == &PicoCpuMS68k) s68k_write32(a, d); else m68k_write32(a, d);\r |
| 1164 | }\r |
| 1165 | \r |
| 1166 | extern unsigned int (*pm68k_read_memory_8) (unsigned int address);\r |
| 1167 | extern unsigned int (*pm68k_read_memory_16)(unsigned int address);\r |
| 1168 | extern unsigned int (*pm68k_read_memory_32)(unsigned int address);\r |
| 1169 | extern void (*pm68k_write_memory_8) (unsigned int address, unsigned char value);\r |
| 1170 | extern void (*pm68k_write_memory_16)(unsigned int address, unsigned short value);\r |
| 1171 | extern void (*pm68k_write_memory_32)(unsigned int address, unsigned int value);\r |
| 1172 | \r |
| 1173 | static void m68k_mem_setup_cd(void)\r |
| 1174 | {\r |
| 1175 | pm68k_read_memory_8 = PicoReadCD8w;\r |
| 1176 | pm68k_read_memory_16 = PicoReadCD16w;\r |
| 1177 | pm68k_read_memory_32 = PicoReadCD32w;\r |
| 1178 | pm68k_write_memory_8 = PicoWriteCD8w;\r |
| 1179 | pm68k_write_memory_16 = PicoWriteCD16w;\r |
| 1180 | pm68k_write_memory_32 = PicoWriteCD32w;\r |
| 1181 | }\r |
| 1182 | #endif // EMU_M68K\r |
| 1183 | \r |
| 1184 | // vim:shiftwidth=2:ts=2:expandtab\r |