| 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 | uptr s68k_read8_map [0x1000000 >> M68K_MEM_SHIFT];\r |
| 13 | uptr s68k_read16_map [0x1000000 >> M68K_MEM_SHIFT];\r |
| 14 | uptr s68k_write8_map [0x1000000 >> M68K_MEM_SHIFT];\r |
| 15 | uptr s68k_write16_map[0x1000000 >> M68K_MEM_SHIFT];\r |
| 16 | \r |
| 17 | MAKE_68K_READ8(s68k_read8, s68k_read8_map)\r |
| 18 | MAKE_68K_READ16(s68k_read16, s68k_read16_map)\r |
| 19 | MAKE_68K_READ32(s68k_read32, s68k_read16_map)\r |
| 20 | MAKE_68K_WRITE8(s68k_write8, s68k_write8_map)\r |
| 21 | MAKE_68K_WRITE16(s68k_write16, s68k_write16_map)\r |
| 22 | MAKE_68K_WRITE32(s68k_write32, s68k_write16_map)\r |
| 23 | \r |
| 24 | // -----------------------------------------------------------------\r |
| 25 | \r |
| 26 | // provided by ASM code:\r |
| 27 | #ifdef _ASM_CD_MEMORY_C\r |
| 28 | u32 PicoReadS68k8_pr(u32 a);\r |
| 29 | u32 PicoReadS68k16_pr(u32 a);\r |
| 30 | void PicoWriteS68k8_pr(u32 a, u32 d);\r |
| 31 | void PicoWriteS68k16_pr(u32 a, u32 d);\r |
| 32 | \r |
| 33 | u32 PicoReadM68k8_cell0(u32 a);\r |
| 34 | u32 PicoReadM68k8_cell1(u32 a);\r |
| 35 | u32 PicoReadM68k16_cell0(u32 a);\r |
| 36 | u32 PicoReadM68k16_cell1(u32 a);\r |
| 37 | void PicoWriteM68k8_cell0(u32 a, u32 d);\r |
| 38 | void PicoWriteM68k8_cell1(u32 a, u32 d);\r |
| 39 | void PicoWriteM68k16_cell0(u32 a, u32 d);\r |
| 40 | void PicoWriteM68k16_cell1(u32 a, u32 d);\r |
| 41 | \r |
| 42 | u32 PicoReadS68k8_dec0(u32 a);\r |
| 43 | u32 PicoReadS68k8_dec1(u32 a);\r |
| 44 | u32 PicoReadS68k16_dec0(u32 a);\r |
| 45 | u32 PicoReadS68k16_dec1(u32 a);\r |
| 46 | void PicoWriteS68k8_dec_m0b0(u32 a, u32 d);\r |
| 47 | void PicoWriteS68k8_dec_m1b0(u32 a, u32 d);\r |
| 48 | void PicoWriteS68k8_dec_m2b0(u32 a, u32 d);\r |
| 49 | void PicoWriteS68k8_dec_m0b1(u32 a, u32 d);\r |
| 50 | void PicoWriteS68k8_dec_m1b1(u32 a, u32 d);\r |
| 51 | void PicoWriteS68k8_dec_m2b1(u32 a, u32 d);\r |
| 52 | void PicoWriteS68k16_dec_m0b0(u32 a, u32 d);\r |
| 53 | void PicoWriteS68k16_dec_m1b0(u32 a, u32 d);\r |
| 54 | void PicoWriteS68k16_dec_m2b0(u32 a, u32 d);\r |
| 55 | void PicoWriteS68k16_dec_m0b1(u32 a, u32 d);\r |
| 56 | void PicoWriteS68k16_dec_m1b1(u32 a, u32 d);\r |
| 57 | void PicoWriteS68k16_dec_m2b1(u32 a, u32 d);\r |
| 58 | #endif\r |
| 59 | \r |
| 60 | static void remap_prg_window(u32 r1, u32 r3);\r |
| 61 | static void remap_word_ram(u32 r3);\r |
| 62 | \r |
| 63 | // poller detection\r |
| 64 | #define POLL_LIMIT 16\r |
| 65 | #define POLL_CYCLES 64\r |
| 66 | \r |
| 67 | void m68k_comm_check(u32 a)\r |
| 68 | {\r |
| 69 | pcd_sync_s68k(SekCyclesDone(), 0);\r |
| 70 | if (a >= 0x0e && !Pico_mcd->m.need_sync) {\r |
| 71 | // there are cases when slave updates comm and only switches RAM\r |
| 72 | // over after that (mcd1b), so there must be a resync..\r |
| 73 | SekEndRun(64);\r |
| 74 | Pico_mcd->m.need_sync = 1;\r |
| 75 | }\r |
| 76 | if (SekNotPolling || a != Pico_mcd->m.m68k_poll_a) {\r |
| 77 | Pico_mcd->m.m68k_poll_a = a;\r |
| 78 | Pico_mcd->m.m68k_poll_cnt = 0;\r |
| 79 | SekNotPolling = 0;\r |
| 80 | return;\r |
| 81 | }\r |
| 82 | Pico_mcd->m.m68k_poll_cnt++;\r |
| 83 | }\r |
| 84 | \r |
| 85 | #ifndef _ASM_CD_MEMORY_C\r |
| 86 | static u32 m68k_reg_read16(u32 a)\r |
| 87 | {\r |
| 88 | u32 d = 0;\r |
| 89 | a &= 0x3e;\r |
| 90 | \r |
| 91 | switch (a) {\r |
| 92 | case 0:\r |
| 93 | // here IFL2 is always 0, just like in Gens\r |
| 94 | d = ((Pico_mcd->s68k_regs[0x33] << 13) & 0x8000)\r |
| 95 | | Pico_mcd->m.busreq;\r |
| 96 | goto end;\r |
| 97 | case 2:\r |
| 98 | m68k_comm_check(a);\r |
| 99 | d = (Pico_mcd->s68k_regs[a]<<8) | (Pico_mcd->s68k_regs[a+1]&0xc7);\r |
| 100 | elprintf(EL_CDREG3, "m68k_regs r3: %02x @%06x", (u8)d, SekPc);\r |
| 101 | goto end;\r |
| 102 | case 4:\r |
| 103 | d = Pico_mcd->s68k_regs[4]<<8;\r |
| 104 | goto end;\r |
| 105 | case 6:\r |
| 106 | d = *(u16 *)(Pico_mcd->bios + 0x72);\r |
| 107 | goto end;\r |
| 108 | case 8:\r |
| 109 | d = cdc_host_r();\r |
| 110 | goto end;\r |
| 111 | case 0xA:\r |
| 112 | elprintf(EL_UIO, "m68k FIXME: reserved read");\r |
| 113 | goto end;\r |
| 114 | case 0xC: // 384 cycle stopwatch timer\r |
| 115 | // ugh..\r |
| 116 | d = pcd_cycles_m68k_to_s68k(SekCyclesDone());\r |
| 117 | d = (d - Pico_mcd->m.stopwatch_base_c) / 384;\r |
| 118 | d &= 0x0fff;\r |
| 119 | elprintf(EL_CDREGS, "m68k stopwatch timer read (%04x)", d);\r |
| 120 | goto end;\r |
| 121 | }\r |
| 122 | \r |
| 123 | if (a < 0x30) {\r |
| 124 | // comm flag/cmd/status (0xE-0x2F)\r |
| 125 | m68k_comm_check(a);\r |
| 126 | d = (Pico_mcd->s68k_regs[a]<<8) | Pico_mcd->s68k_regs[a+1];\r |
| 127 | goto end;\r |
| 128 | }\r |
| 129 | \r |
| 130 | elprintf(EL_UIO, "m68k_regs FIXME invalid read @ %02x", a);\r |
| 131 | \r |
| 132 | end:\r |
| 133 | return d;\r |
| 134 | }\r |
| 135 | #endif\r |
| 136 | \r |
| 137 | #ifndef _ASM_CD_MEMORY_C\r |
| 138 | static\r |
| 139 | #endif\r |
| 140 | void m68k_reg_write8(u32 a, u32 d)\r |
| 141 | {\r |
| 142 | u32 dold;\r |
| 143 | a &= 0x3f;\r |
| 144 | \r |
| 145 | switch (a) {\r |
| 146 | case 0:\r |
| 147 | d &= 1;\r |
| 148 | if (d && (Pico_mcd->s68k_regs[0x33] & PCDS_IEN2)) {\r |
| 149 | elprintf(EL_INTS, "m68k: s68k irq 2");\r |
| 150 | pcd_sync_s68k(SekCyclesDone(), 0);\r |
| 151 | SekInterruptS68k(2);\r |
| 152 | }\r |
| 153 | return;\r |
| 154 | case 1:\r |
| 155 | d &= 3;\r |
| 156 | dold = Pico_mcd->m.busreq;\r |
| 157 | if (!(d & 1))\r |
| 158 | d |= 2; // verified: can't release bus on reset\r |
| 159 | if (dold == d)\r |
| 160 | return;\r |
| 161 | \r |
| 162 | pcd_sync_s68k(SekCyclesDone(), 0);\r |
| 163 | \r |
| 164 | if ((dold ^ d) & 1)\r |
| 165 | elprintf(EL_INTSW, "m68k: s68k reset %i", !(d&1));\r |
| 166 | if (!(d & 1))\r |
| 167 | Pico_mcd->m.state_flags |= PCD_ST_S68K_RST;\r |
| 168 | else if (d == 1 && (Pico_mcd->m.state_flags & PCD_ST_S68K_RST)) {\r |
| 169 | Pico_mcd->m.state_flags &= ~PCD_ST_S68K_RST;\r |
| 170 | elprintf(EL_CDREGS, "m68k: resetting s68k");\r |
| 171 | SekResetS68k();\r |
| 172 | }\r |
| 173 | if ((dold ^ d) & 2) {\r |
| 174 | elprintf(EL_INTSW, "m68k: s68k brq %i", d >> 1);\r |
| 175 | remap_prg_window(d, Pico_mcd->s68k_regs[3]);\r |
| 176 | }\r |
| 177 | Pico_mcd->m.busreq = d;\r |
| 178 | return;\r |
| 179 | case 2:\r |
| 180 | elprintf(EL_CDREGS, "m68k: prg wp=%02x", d);\r |
| 181 | Pico_mcd->s68k_regs[2] = d; // really use s68k side register\r |
| 182 | return;\r |
| 183 | case 3:\r |
| 184 | dold = Pico_mcd->s68k_regs[3];\r |
| 185 | elprintf(EL_CDREG3, "m68k_regs w3: %02x @%06x", (u8)d, SekPc);\r |
| 186 | if ((d ^ dold) & 0xc0) {\r |
| 187 | elprintf(EL_CDREGS, "m68k: prg bank: %i -> %i",\r |
| 188 | (Pico_mcd->s68k_regs[a]>>6), ((d>>6)&3));\r |
| 189 | remap_prg_window(Pico_mcd->m.busreq, d);\r |
| 190 | }\r |
| 191 | \r |
| 192 | // 2M mode state is tracked regardless of current mode\r |
| 193 | if (d & 2) {\r |
| 194 | Pico_mcd->m.dmna_ret_2m |= 2;\r |
| 195 | Pico_mcd->m.dmna_ret_2m &= ~1;\r |
| 196 | }\r |
| 197 | if (dold & 4) { // 1M mode\r |
| 198 | d ^= 2; // 0 sets DMNA, 1 does nothing\r |
| 199 | d = (d & 0xc2) | (dold & 0x1f);\r |
| 200 | }\r |
| 201 | else\r |
| 202 | d = (d & 0xc0) | (dold & 0x1c) | Pico_mcd->m.dmna_ret_2m;\r |
| 203 | \r |
| 204 | goto write_comm;\r |
| 205 | case 6:\r |
| 206 | Pico_mcd->bios[0x72 + 1] = d; // simple hint vector changer\r |
| 207 | return;\r |
| 208 | case 7:\r |
| 209 | Pico_mcd->bios[0x72] = d;\r |
| 210 | elprintf(EL_CDREGS, "hint vector set to %04x%04x",\r |
| 211 | ((u16 *)Pico_mcd->bios)[0x70/2], ((u16 *)Pico_mcd->bios)[0x72/2]);\r |
| 212 | return;\r |
| 213 | case 0x0f:\r |
| 214 | a = 0x0e;\r |
| 215 | case 0x0e:\r |
| 216 | goto write_comm;\r |
| 217 | }\r |
| 218 | \r |
| 219 | if ((a&0xf0) == 0x10)\r |
| 220 | goto write_comm;\r |
| 221 | \r |
| 222 | elprintf(EL_UIO, "m68k FIXME: invalid write? [%02x] %02x", a, d);\r |
| 223 | return;\r |
| 224 | \r |
| 225 | write_comm:\r |
| 226 | if (d == Pico_mcd->s68k_regs[a])\r |
| 227 | return;\r |
| 228 | \r |
| 229 | pcd_sync_s68k(SekCyclesDone(), 0);\r |
| 230 | Pico_mcd->s68k_regs[a] = d;\r |
| 231 | if (Pico_mcd->m.s68k_poll_a == (a & ~1))\r |
| 232 | {\r |
| 233 | if (Pico_mcd->m.s68k_poll_cnt > POLL_LIMIT) {\r |
| 234 | elprintf(EL_CDPOLL, "s68k poll release, a=%02x", a);\r |
| 235 | SekSetStopS68k(0);\r |
| 236 | }\r |
| 237 | Pico_mcd->m.s68k_poll_a = 0;\r |
| 238 | }\r |
| 239 | }\r |
| 240 | \r |
| 241 | u32 s68k_poll_detect(u32 a, u32 d)\r |
| 242 | {\r |
| 243 | #ifdef USE_POLL_DETECT\r |
| 244 | u32 cycles, cnt = 0;\r |
| 245 | if (SekIsStoppedS68k())\r |
| 246 | return d;\r |
| 247 | \r |
| 248 | cycles = SekCyclesDoneS68k();\r |
| 249 | if (!SekNotPolling && a == Pico_mcd->m.s68k_poll_a) {\r |
| 250 | u32 clkdiff = cycles - Pico_mcd->m.s68k_poll_clk;\r |
| 251 | if (clkdiff <= POLL_CYCLES) {\r |
| 252 | cnt = Pico_mcd->m.s68k_poll_cnt + 1;\r |
| 253 | //printf("-- diff: %u, cnt = %i\n", clkdiff, cnt);\r |
| 254 | if (Pico_mcd->m.s68k_poll_cnt > POLL_LIMIT) {\r |
| 255 | SekSetStopS68k(1);\r |
| 256 | elprintf(EL_CDPOLL, "s68k poll detected @%06x, a=%02x",\r |
| 257 | SekPcS68k, a);\r |
| 258 | }\r |
| 259 | }\r |
| 260 | }\r |
| 261 | Pico_mcd->m.s68k_poll_a = a;\r |
| 262 | Pico_mcd->m.s68k_poll_clk = cycles;\r |
| 263 | Pico_mcd->m.s68k_poll_cnt = cnt;\r |
| 264 | SekNotPollingS68k = 0;\r |
| 265 | #endif\r |
| 266 | return d;\r |
| 267 | }\r |
| 268 | \r |
| 269 | #define READ_FONT_DATA(basemask) \\r |
| 270 | { \\r |
| 271 | unsigned int fnt = *(unsigned int *)(Pico_mcd->s68k_regs + 0x4c); \\r |
| 272 | unsigned int col0 = (fnt >> 8) & 0x0f, col1 = (fnt >> 12) & 0x0f; \\r |
| 273 | if (fnt & (basemask << 0)) d = col1 ; else d = col0; \\r |
| 274 | if (fnt & (basemask << 1)) d |= col1 << 4; else d |= col0 << 4; \\r |
| 275 | if (fnt & (basemask << 2)) d |= col1 << 8; else d |= col0 << 8; \\r |
| 276 | if (fnt & (basemask << 3)) d |= col1 << 12; else d |= col0 << 12; \\r |
| 277 | }\r |
| 278 | \r |
| 279 | \r |
| 280 | #ifndef _ASM_CD_MEMORY_C\r |
| 281 | static\r |
| 282 | #endif\r |
| 283 | u32 s68k_reg_read16(u32 a)\r |
| 284 | {\r |
| 285 | u32 d=0;\r |
| 286 | \r |
| 287 | switch (a) {\r |
| 288 | case 0:\r |
| 289 | return ((Pico_mcd->s68k_regs[0]&3)<<8) | 1; // ver = 0, not in reset state\r |
| 290 | case 2:\r |
| 291 | d = (Pico_mcd->s68k_regs[2]<<8) | (Pico_mcd->s68k_regs[3]&0x1f);\r |
| 292 | elprintf(EL_CDREG3, "s68k_regs r3: %02x @%06x", (u8)d, SekPcS68k);\r |
| 293 | return s68k_poll_detect(a, d);\r |
| 294 | case 6:\r |
| 295 | return cdc_reg_r();\r |
| 296 | case 8:\r |
| 297 | return cdc_host_r();\r |
| 298 | case 0xC:\r |
| 299 | d = SekCyclesDoneS68k() - Pico_mcd->m.stopwatch_base_c;\r |
| 300 | d /= 384;\r |
| 301 | d &= 0x0fff;\r |
| 302 | elprintf(EL_CDREGS, "s68k stopwatch timer read (%04x)", d);\r |
| 303 | return d;\r |
| 304 | case 0x30:\r |
| 305 | elprintf(EL_CDREGS, "s68k int3 timer read (%02x)", Pico_mcd->s68k_regs[31]);\r |
| 306 | return Pico_mcd->s68k_regs[31];\r |
| 307 | case 0x34: // fader\r |
| 308 | return 0; // no busy bit\r |
| 309 | case 0x50: // font data (check: Lunar 2, Silpheed)\r |
| 310 | READ_FONT_DATA(0x00100000);\r |
| 311 | return d;\r |
| 312 | case 0x52:\r |
| 313 | READ_FONT_DATA(0x00010000);\r |
| 314 | return d;\r |
| 315 | case 0x54:\r |
| 316 | READ_FONT_DATA(0x10000000);\r |
| 317 | return d;\r |
| 318 | case 0x56:\r |
| 319 | READ_FONT_DATA(0x01000000);\r |
| 320 | return d;\r |
| 321 | }\r |
| 322 | \r |
| 323 | d = (Pico_mcd->s68k_regs[a]<<8) | Pico_mcd->s68k_regs[a+1];\r |
| 324 | \r |
| 325 | if (a >= 0x0e && a < 0x30)\r |
| 326 | return s68k_poll_detect(a, d);\r |
| 327 | \r |
| 328 | return d;\r |
| 329 | }\r |
| 330 | \r |
| 331 | #ifndef _ASM_CD_MEMORY_C\r |
| 332 | static\r |
| 333 | #endif\r |
| 334 | void s68k_reg_write8(u32 a, u32 d)\r |
| 335 | {\r |
| 336 | // Warning: d might have upper bits set\r |
| 337 | switch (a) {\r |
| 338 | case 1:\r |
| 339 | if (!(d & 1))\r |
| 340 | pcd_soft_reset();\r |
| 341 | return;\r |
| 342 | case 2:\r |
| 343 | return; // only m68k can change WP\r |
| 344 | case 3: {\r |
| 345 | int dold = Pico_mcd->s68k_regs[3];\r |
| 346 | elprintf(EL_CDREG3, "s68k_regs w3: %02x @%06x", (u8)d, SekPcS68k);\r |
| 347 | d &= 0x1d;\r |
| 348 | d |= dold & 0xc2;\r |
| 349 | \r |
| 350 | // 2M mode state\r |
| 351 | if (d & 1) {\r |
| 352 | Pico_mcd->m.dmna_ret_2m |= 1;\r |
| 353 | Pico_mcd->m.dmna_ret_2m &= ~2; // DMNA clears\r |
| 354 | }\r |
| 355 | \r |
| 356 | if (d & 4)\r |
| 357 | {\r |
| 358 | if (!(dold & 4)) {\r |
| 359 | elprintf(EL_CDREG3, "wram mode 2M->1M");\r |
| 360 | wram_2M_to_1M(Pico_mcd->word_ram2M);\r |
| 361 | }\r |
| 362 | \r |
| 363 | if ((d ^ dold) & 0x1d)\r |
| 364 | remap_word_ram(d);\r |
| 365 | \r |
| 366 | if ((d ^ dold) & 0x05)\r |
| 367 | d &= ~2; // clear DMNA - swap complete\r |
| 368 | }\r |
| 369 | else\r |
| 370 | {\r |
| 371 | if (dold & 4) {\r |
| 372 | elprintf(EL_CDREG3, "wram mode 1M->2M");\r |
| 373 | wram_1M_to_2M(Pico_mcd->word_ram2M);\r |
| 374 | remap_word_ram(d);\r |
| 375 | }\r |
| 376 | d = (d & ~3) | Pico_mcd->m.dmna_ret_2m;\r |
| 377 | }\r |
| 378 | goto write_comm;\r |
| 379 | }\r |
| 380 | case 4:\r |
| 381 | elprintf(EL_CDREGS, "s68k CDC dest: %x", d&7);\r |
| 382 | Pico_mcd->s68k_regs[4] = (Pico_mcd->s68k_regs[4]&0xC0) | (d&7); // CDC mode\r |
| 383 | return;\r |
| 384 | case 5:\r |
| 385 | //dprintf("s68k CDC reg addr: %x", d&0xf);\r |
| 386 | break;\r |
| 387 | case 7:\r |
| 388 | cdc_reg_w(d & 0xff);\r |
| 389 | return;\r |
| 390 | case 0xa:\r |
| 391 | elprintf(EL_CDREGS, "s68k set CDC dma addr");\r |
| 392 | break;\r |
| 393 | case 0xc:\r |
| 394 | case 0xd: // 384 cycle stopwatch timer\r |
| 395 | elprintf(EL_CDREGS|EL_CD, "s68k clear stopwatch (%x)", d);\r |
| 396 | // does this also reset internal 384 cycle counter?\r |
| 397 | Pico_mcd->m.stopwatch_base_c = SekCyclesDoneS68k();\r |
| 398 | return;\r |
| 399 | case 0x0e:\r |
| 400 | a = 0x0f;\r |
| 401 | case 0x0f:\r |
| 402 | goto write_comm;\r |
| 403 | case 0x31: // 384 cycle int3 timer\r |
| 404 | d &= 0xff;\r |
| 405 | elprintf(EL_CDREGS|EL_CD, "s68k set int3 timer: %02x", d);\r |
| 406 | Pico_mcd->s68k_regs[a] = (u8) d;\r |
| 407 | if (d) // d or d+1??\r |
| 408 | pcd_event_schedule_s68k(PCD_EVENT_TIMER3, d * 384);\r |
| 409 | else\r |
| 410 | pcd_event_schedule(0, PCD_EVENT_TIMER3, 0);\r |
| 411 | break;\r |
| 412 | case 0x33: // IRQ mask\r |
| 413 | elprintf(EL_CDREGS|EL_CD, "s68k irq mask: %02x", d);\r |
| 414 | d &= 0x7e;\r |
| 415 | if ((d ^ Pico_mcd->s68k_regs[0x33]) & d & PCDS_IEN4) {\r |
| 416 | // XXX: emulate pending irq instead?\r |
| 417 | if (Pico_mcd->s68k_regs[0x37] & 4) {\r |
| 418 | elprintf(EL_INTS, "cdd export irq 4 (unmask)");\r |
| 419 | SekInterruptS68k(4);\r |
| 420 | }\r |
| 421 | }\r |
| 422 | break;\r |
| 423 | case 0x34: // fader\r |
| 424 | Pico_mcd->s68k_regs[a] = (u8) d & 0x7f;\r |
| 425 | return;\r |
| 426 | case 0x36:\r |
| 427 | return; // d/m bit is unsetable\r |
| 428 | case 0x37: {\r |
| 429 | u32 d_old = Pico_mcd->s68k_regs[0x37];\r |
| 430 | Pico_mcd->s68k_regs[0x37] = d & 7;\r |
| 431 | if ((d&4) && !(d_old&4)) {\r |
| 432 | // ??\r |
| 433 | pcd_event_schedule_s68k(PCD_EVENT_CDC, 12500000/75);\r |
| 434 | \r |
| 435 | if (Pico_mcd->s68k_regs[0x33] & PCDS_IEN4) {\r |
| 436 | elprintf(EL_INTS, "cdd export irq 4");\r |
| 437 | SekInterruptS68k(4);\r |
| 438 | }\r |
| 439 | }\r |
| 440 | return;\r |
| 441 | }\r |
| 442 | case 0x4b:\r |
| 443 | Pico_mcd->s68k_regs[a] = 0; // (u8) d; ?\r |
| 444 | cdd_process();\r |
| 445 | {\r |
| 446 | static const char *nm[] =\r |
| 447 | { "stat", "stop", "read_toc", "play",\r |
| 448 | "seek", "???", "pause", "resume",\r |
| 449 | "ff", "fr", "tjump", "???",\r |
| 450 | "close","open", "???", "???" };\r |
| 451 | u8 *c = &Pico_mcd->s68k_regs[0x42];\r |
| 452 | u8 *s = &Pico_mcd->s68k_regs[0x38];\r |
| 453 | elprintf(EL_CD,\r |
| 454 | "CDD command: %02x %02x %02x %02x %02x %02x %02x %02x %12s",\r |
| 455 | c[0], c[1], c[2], c[3], c[4], c[5], c[6], c[7], nm[c[0] & 0x0f]);\r |
| 456 | elprintf(EL_CD,\r |
| 457 | "CDD status: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x",\r |
| 458 | s[0], s[1], s[2], s[3], s[4], s[5], s[6], s[7], s[8], s[9]);\r |
| 459 | }\r |
| 460 | return;\r |
| 461 | case 0x58:\r |
| 462 | return;\r |
| 463 | }\r |
| 464 | \r |
| 465 | if ((a&0x1f0) == 0x20)\r |
| 466 | goto write_comm;\r |
| 467 | \r |
| 468 | if ((a&0x1f0) == 0x10 || (a >= 0x38 && a < 0x42))\r |
| 469 | {\r |
| 470 | elprintf(EL_UIO, "s68k FIXME: invalid write @ %02x?", a);\r |
| 471 | return;\r |
| 472 | }\r |
| 473 | \r |
| 474 | Pico_mcd->s68k_regs[a] = (u8) d;\r |
| 475 | return;\r |
| 476 | \r |
| 477 | write_comm:\r |
| 478 | Pico_mcd->s68k_regs[a] = (u8) d;\r |
| 479 | if (Pico_mcd->m.m68k_poll_cnt)\r |
| 480 | SekEndRunS68k(0);\r |
| 481 | Pico_mcd->m.m68k_poll_cnt = 0;\r |
| 482 | }\r |
| 483 | \r |
| 484 | void s68k_reg_write16(u32 a, u32 d)\r |
| 485 | {\r |
| 486 | u8 *r = Pico_mcd->s68k_regs;\r |
| 487 | \r |
| 488 | if ((a & 0x1f0) == 0x20)\r |
| 489 | goto write_comm;\r |
| 490 | \r |
| 491 | switch (a) {\r |
| 492 | case 0x0e:\r |
| 493 | // special case, 2 byte writes would be handled differently\r |
| 494 | // TODO: verify\r |
| 495 | r[0xf] = d;\r |
| 496 | return;\r |
| 497 | case 0x58: // stamp data size\r |
| 498 | r[0x59] = d & 7;\r |
| 499 | return;\r |
| 500 | case 0x5a: // stamp map base address\r |
| 501 | r[0x5a] = d >> 8;\r |
| 502 | r[0x5b] = d & 0xe0;\r |
| 503 | return;\r |
| 504 | case 0x5c: // V cell size\r |
| 505 | r[0x5d] = d & 0x1f;\r |
| 506 | return;\r |
| 507 | case 0x5e: // image buffer start address\r |
| 508 | r[0x5e] = d >> 8;\r |
| 509 | r[0x5f] = d & 0xf8;\r |
| 510 | return;\r |
| 511 | case 0x60: // image buffer offset\r |
| 512 | r[0x61] = d & 0x3f;\r |
| 513 | return;\r |
| 514 | case 0x62: // h dot size\r |
| 515 | r[0x62] = (d >> 8) & 1;\r |
| 516 | r[0x63] = d;\r |
| 517 | return;\r |
| 518 | case 0x64: // v dot size\r |
| 519 | r[0x65] = d;\r |
| 520 | return;\r |
| 521 | case 0x66: // trace vector base address\r |
| 522 | d &= 0xfffe;\r |
| 523 | r[0x66] = d >> 8;\r |
| 524 | r[0x67] = d;\r |
| 525 | gfx_start(d);\r |
| 526 | return;\r |
| 527 | default:\r |
| 528 | break;\r |
| 529 | }\r |
| 530 | \r |
| 531 | s68k_reg_write8(a, d >> 8);\r |
| 532 | s68k_reg_write8(a + 1, d & 0xff);\r |
| 533 | return;\r |
| 534 | \r |
| 535 | write_comm:\r |
| 536 | r[a] = d >> 8;\r |
| 537 | r[a + 1] = d;\r |
| 538 | if (Pico_mcd->m.m68k_poll_cnt)\r |
| 539 | SekEndRunS68k(0);\r |
| 540 | Pico_mcd->m.m68k_poll_cnt = 0;\r |
| 541 | }\r |
| 542 | \r |
| 543 | // -----------------------------------------------------------------\r |
| 544 | // Main 68k\r |
| 545 | // -----------------------------------------------------------------\r |
| 546 | \r |
| 547 | #ifndef _ASM_CD_MEMORY_C\r |
| 548 | #include "cell_map.c"\r |
| 549 | \r |
| 550 | // WORD RAM, cell aranged area (220000 - 23ffff)\r |
| 551 | static u32 PicoReadM68k8_cell0(u32 a)\r |
| 552 | {\r |
| 553 | a = (a&3) | (cell_map(a >> 2) << 2); // cell arranged\r |
| 554 | return Pico_mcd->word_ram1M[0][a ^ 1];\r |
| 555 | }\r |
| 556 | \r |
| 557 | static u32 PicoReadM68k8_cell1(u32 a)\r |
| 558 | {\r |
| 559 | a = (a&3) | (cell_map(a >> 2) << 2);\r |
| 560 | return Pico_mcd->word_ram1M[1][a ^ 1];\r |
| 561 | }\r |
| 562 | \r |
| 563 | static u32 PicoReadM68k16_cell0(u32 a)\r |
| 564 | {\r |
| 565 | a = (a&2) | (cell_map(a >> 2) << 2);\r |
| 566 | return *(u16 *)(Pico_mcd->word_ram1M[0] + a);\r |
| 567 | }\r |
| 568 | \r |
| 569 | static u32 PicoReadM68k16_cell1(u32 a)\r |
| 570 | {\r |
| 571 | a = (a&2) | (cell_map(a >> 2) << 2);\r |
| 572 | return *(u16 *)(Pico_mcd->word_ram1M[1] + a);\r |
| 573 | }\r |
| 574 | \r |
| 575 | static void PicoWriteM68k8_cell0(u32 a, u32 d)\r |
| 576 | {\r |
| 577 | a = (a&3) | (cell_map(a >> 2) << 2);\r |
| 578 | Pico_mcd->word_ram1M[0][a ^ 1] = d;\r |
| 579 | }\r |
| 580 | \r |
| 581 | static void PicoWriteM68k8_cell1(u32 a, u32 d)\r |
| 582 | {\r |
| 583 | a = (a&3) | (cell_map(a >> 2) << 2);\r |
| 584 | Pico_mcd->word_ram1M[1][a ^ 1] = d;\r |
| 585 | }\r |
| 586 | \r |
| 587 | static void PicoWriteM68k16_cell0(u32 a, u32 d)\r |
| 588 | {\r |
| 589 | a = (a&3) | (cell_map(a >> 2) << 2);\r |
| 590 | *(u16 *)(Pico_mcd->word_ram1M[0] + a) = d;\r |
| 591 | }\r |
| 592 | \r |
| 593 | static void PicoWriteM68k16_cell1(u32 a, u32 d)\r |
| 594 | {\r |
| 595 | a = (a&3) | (cell_map(a >> 2) << 2);\r |
| 596 | *(u16 *)(Pico_mcd->word_ram1M[1] + a) = d;\r |
| 597 | }\r |
| 598 | #endif\r |
| 599 | \r |
| 600 | // RAM cart (40000 - 7fffff, optional)\r |
| 601 | static u32 PicoReadM68k8_ramc(u32 a)\r |
| 602 | {\r |
| 603 | u32 d = 0;\r |
| 604 | if (a == 0x400001) {\r |
| 605 | if (SRam.data != NULL)\r |
| 606 | d = 3; // 64k cart\r |
| 607 | return d;\r |
| 608 | }\r |
| 609 | \r |
| 610 | if ((a & 0xfe0000) == 0x600000) {\r |
| 611 | if (SRam.data != NULL)\r |
| 612 | d = SRam.data[((a >> 1) & 0xffff) + 0x2000];\r |
| 613 | return d;\r |
| 614 | }\r |
| 615 | \r |
| 616 | if (a == 0x7fffff)\r |
| 617 | return Pico_mcd->m.bcram_reg;\r |
| 618 | \r |
| 619 | elprintf(EL_UIO, "m68k unmapped r8 [%06x] @%06x", a, SekPc);\r |
| 620 | return d;\r |
| 621 | }\r |
| 622 | \r |
| 623 | static u32 PicoReadM68k16_ramc(u32 a)\r |
| 624 | {\r |
| 625 | elprintf(EL_ANOMALY, "ramcart r16: [%06x] @%06x", a, SekPcS68k);\r |
| 626 | return PicoReadM68k8_ramc(a + 1);\r |
| 627 | }\r |
| 628 | \r |
| 629 | static void PicoWriteM68k8_ramc(u32 a, u32 d)\r |
| 630 | {\r |
| 631 | if ((a & 0xfe0000) == 0x600000) {\r |
| 632 | if (SRam.data != NULL && (Pico_mcd->m.bcram_reg & 1)) {\r |
| 633 | SRam.data[((a>>1) & 0xffff) + 0x2000] = d;\r |
| 634 | SRam.changed = 1;\r |
| 635 | }\r |
| 636 | return;\r |
| 637 | }\r |
| 638 | \r |
| 639 | if (a == 0x7fffff) {\r |
| 640 | Pico_mcd->m.bcram_reg = d;\r |
| 641 | return;\r |
| 642 | }\r |
| 643 | \r |
| 644 | elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x",\r |
| 645 | a, d & 0xff, SekPc);\r |
| 646 | }\r |
| 647 | \r |
| 648 | static void PicoWriteM68k16_ramc(u32 a, u32 d)\r |
| 649 | {\r |
| 650 | elprintf(EL_ANOMALY, "ramcart w16: [%06x] %04x @%06x",\r |
| 651 | a, d, SekPcS68k);\r |
| 652 | PicoWriteM68k8_ramc(a + 1, d);\r |
| 653 | }\r |
| 654 | \r |
| 655 | // IO/control/cd registers (a10000 - ...)\r |
| 656 | #ifndef _ASM_CD_MEMORY_C\r |
| 657 | u32 PicoRead8_mcd_io(u32 a)\r |
| 658 | {\r |
| 659 | u32 d;\r |
| 660 | if ((a & 0xff00) == 0x2000) { // a12000 - a120ff\r |
| 661 | d = m68k_reg_read16(a); // TODO: m68k_reg_read8\r |
| 662 | if (!(a & 1))\r |
| 663 | d >>= 8;\r |
| 664 | d &= 0xff;\r |
| 665 | elprintf(EL_CDREGS, "m68k_regs r8: [%02x] %02x @%06x",\r |
| 666 | a & 0x3f, d, SekPc);\r |
| 667 | return d;\r |
| 668 | }\r |
| 669 | \r |
| 670 | // fallback to default MD handler\r |
| 671 | return PicoRead8_io(a);\r |
| 672 | }\r |
| 673 | \r |
| 674 | u32 PicoRead16_mcd_io(u32 a)\r |
| 675 | {\r |
| 676 | u32 d;\r |
| 677 | if ((a & 0xff00) == 0x2000) {\r |
| 678 | d = m68k_reg_read16(a);\r |
| 679 | elprintf(EL_CDREGS, "m68k_regs r16: [%02x] %04x @%06x",\r |
| 680 | a & 0x3f, d, SekPc);\r |
| 681 | return d;\r |
| 682 | }\r |
| 683 | \r |
| 684 | return PicoRead16_io(a);\r |
| 685 | }\r |
| 686 | \r |
| 687 | void PicoWrite8_mcd_io(u32 a, u32 d)\r |
| 688 | {\r |
| 689 | if ((a & 0xff00) == 0x2000) { // a12000 - a120ff\r |
| 690 | elprintf(EL_CDREGS, "m68k_regs w8: [%02x] %02x @%06x",\r |
| 691 | a & 0x3f, d, SekPc);\r |
| 692 | m68k_reg_write8(a, d);\r |
| 693 | return;\r |
| 694 | }\r |
| 695 | \r |
| 696 | PicoWrite8_io(a, d);\r |
| 697 | }\r |
| 698 | \r |
| 699 | void PicoWrite16_mcd_io(u32 a, u32 d)\r |
| 700 | {\r |
| 701 | if ((a & 0xff00) == 0x2000) { // a12000 - a120ff\r |
| 702 | elprintf(EL_CDREGS, "m68k_regs w16: [%02x] %04x @%06x",\r |
| 703 | a & 0x3f, d, SekPc);\r |
| 704 | \r |
| 705 | m68k_reg_write8(a, d >> 8);\r |
| 706 | if ((a & 0x3e) != 0x0e) // special case\r |
| 707 | m68k_reg_write8(a + 1, d & 0xff);\r |
| 708 | return;\r |
| 709 | }\r |
| 710 | \r |
| 711 | PicoWrite16_io(a, d);\r |
| 712 | }\r |
| 713 | #endif\r |
| 714 | \r |
| 715 | // -----------------------------------------------------------------\r |
| 716 | // Sub 68k\r |
| 717 | // -----------------------------------------------------------------\r |
| 718 | \r |
| 719 | static u32 s68k_unmapped_read8(u32 a)\r |
| 720 | {\r |
| 721 | elprintf(EL_UIO, "s68k unmapped r8 [%06x] @%06x", a, SekPc);\r |
| 722 | return 0;\r |
| 723 | }\r |
| 724 | \r |
| 725 | static u32 s68k_unmapped_read16(u32 a)\r |
| 726 | {\r |
| 727 | elprintf(EL_UIO, "s68k unmapped r16 [%06x] @%06x", a, SekPc);\r |
| 728 | return 0;\r |
| 729 | }\r |
| 730 | \r |
| 731 | static void s68k_unmapped_write8(u32 a, u32 d)\r |
| 732 | {\r |
| 733 | elprintf(EL_UIO, "s68k unmapped w8 [%06x] %02x @%06x",\r |
| 734 | a, d & 0xff, SekPc);\r |
| 735 | }\r |
| 736 | \r |
| 737 | static void s68k_unmapped_write16(u32 a, u32 d)\r |
| 738 | {\r |
| 739 | elprintf(EL_UIO, "s68k unmapped w16 [%06x] %04x @%06x",\r |
| 740 | a, d & 0xffff, SekPc);\r |
| 741 | }\r |
| 742 | \r |
| 743 | // PRG RAM protected range (000000 - 01fdff)?\r |
| 744 | // XXX verify: ff00 or 1fe00 max?\r |
| 745 | static void PicoWriteS68k8_prgwp(u32 a, u32 d)\r |
| 746 | {\r |
| 747 | if (a >= (Pico_mcd->s68k_regs[2] << 9))\r |
| 748 | Pico_mcd->prg_ram[a ^ 1] = d;\r |
| 749 | }\r |
| 750 | \r |
| 751 | static void PicoWriteS68k16_prgwp(u32 a, u32 d)\r |
| 752 | {\r |
| 753 | if (a >= (Pico_mcd->s68k_regs[2] << 9))\r |
| 754 | *(u16 *)(Pico_mcd->prg_ram + a) = d;\r |
| 755 | }\r |
| 756 | \r |
| 757 | #ifndef _ASM_CD_MEMORY_C\r |
| 758 | \r |
| 759 | // decode (080000 - 0bffff, in 1M mode)\r |
| 760 | static u32 PicoReadS68k8_dec0(u32 a)\r |
| 761 | {\r |
| 762 | u32 d = Pico_mcd->word_ram1M[0][((a >> 1) ^ 1) & 0x1ffff];\r |
| 763 | if (a & 1)\r |
| 764 | d &= 0x0f;\r |
| 765 | else\r |
| 766 | d >>= 4;\r |
| 767 | return d;\r |
| 768 | }\r |
| 769 | \r |
| 770 | static u32 PicoReadS68k8_dec1(u32 a)\r |
| 771 | {\r |
| 772 | u32 d = Pico_mcd->word_ram1M[1][((a >> 1) ^ 1) & 0x1ffff];\r |
| 773 | if (a & 1)\r |
| 774 | d &= 0x0f;\r |
| 775 | else\r |
| 776 | d >>= 4;\r |
| 777 | return d;\r |
| 778 | }\r |
| 779 | \r |
| 780 | static u32 PicoReadS68k16_dec0(u32 a)\r |
| 781 | {\r |
| 782 | u32 d = Pico_mcd->word_ram1M[0][((a >> 1) ^ 1) & 0x1ffff];\r |
| 783 | d |= d << 4;\r |
| 784 | d &= ~0xf0;\r |
| 785 | return d;\r |
| 786 | }\r |
| 787 | \r |
| 788 | static u32 PicoReadS68k16_dec1(u32 a)\r |
| 789 | {\r |
| 790 | u32 d = Pico_mcd->word_ram1M[1][((a >> 1) ^ 1) & 0x1ffff];\r |
| 791 | d |= d << 4;\r |
| 792 | d &= ~0xf0;\r |
| 793 | return d;\r |
| 794 | }\r |
| 795 | \r |
| 796 | /* check: jaguar xj 220 (draws entire world using decode) */\r |
| 797 | #define mk_decode_w8(bank) \\r |
| 798 | static void PicoWriteS68k8_dec_m0b##bank(u32 a, u32 d) \\r |
| 799 | { \\r |
| 800 | u8 *pd = &Pico_mcd->word_ram1M[bank][((a >> 1) ^ 1) & 0x1ffff]; \\r |
| 801 | \\r |
| 802 | if (!(a & 1)) \\r |
| 803 | *pd = (*pd & 0x0f) | (d << 4); \\r |
| 804 | else \\r |
| 805 | *pd = (*pd & 0xf0) | (d & 0x0f); \\r |
| 806 | } \\r |
| 807 | \\r |
| 808 | static void PicoWriteS68k8_dec_m1b##bank(u32 a, u32 d) \\r |
| 809 | { \\r |
| 810 | u8 *pd = &Pico_mcd->word_ram1M[bank][((a >> 1) ^ 1) & 0x1ffff]; \\r |
| 811 | u8 mask = (a & 1) ? 0x0f : 0xf0; \\r |
| 812 | \\r |
| 813 | if (!(*pd & mask) && (d & 0x0f)) /* underwrite */ \\r |
| 814 | PicoWriteS68k8_dec_m0b##bank(a, d); \\r |
| 815 | } \\r |
| 816 | \\r |
| 817 | static void PicoWriteS68k8_dec_m2b##bank(u32 a, u32 d) /* ...and m3? */ \\r |
| 818 | { \\r |
| 819 | if (d & 0x0f) /* overwrite */ \\r |
| 820 | PicoWriteS68k8_dec_m0b##bank(a, d); \\r |
| 821 | }\r |
| 822 | \r |
| 823 | mk_decode_w8(0)\r |
| 824 | mk_decode_w8(1)\r |
| 825 | \r |
| 826 | #define mk_decode_w16(bank) \\r |
| 827 | static void PicoWriteS68k16_dec_m0b##bank(u32 a, u32 d) \\r |
| 828 | { \\r |
| 829 | u8 *pd = &Pico_mcd->word_ram1M[bank][((a >> 1) ^ 1) & 0x1ffff]; \\r |
| 830 | \\r |
| 831 | d &= 0x0f0f; \\r |
| 832 | *pd = d | (d >> 4); \\r |
| 833 | } \\r |
| 834 | \\r |
| 835 | static void PicoWriteS68k16_dec_m1b##bank(u32 a, u32 d) \\r |
| 836 | { \\r |
| 837 | u8 *pd = &Pico_mcd->word_ram1M[bank][((a >> 1) ^ 1) & 0x1ffff]; \\r |
| 838 | \\r |
| 839 | d &= 0x0f0f; /* underwrite */ \\r |
| 840 | if (!(*pd & 0xf0)) *pd |= d >> 4; \\r |
| 841 | if (!(*pd & 0x0f)) *pd |= d; \\r |
| 842 | } \\r |
| 843 | \\r |
| 844 | static void PicoWriteS68k16_dec_m2b##bank(u32 a, u32 d) \\r |
| 845 | { \\r |
| 846 | u8 *pd = &Pico_mcd->word_ram1M[bank][((a >> 1) ^ 1) & 0x1ffff]; \\r |
| 847 | \\r |
| 848 | d &= 0x0f0f; /* overwrite */ \\r |
| 849 | d |= d >> 4; \\r |
| 850 | \\r |
| 851 | if (!(d & 0xf0)) d |= *pd & 0xf0; \\r |
| 852 | if (!(d & 0x0f)) d |= *pd & 0x0f; \\r |
| 853 | *pd = d; \\r |
| 854 | }\r |
| 855 | \r |
| 856 | mk_decode_w16(0)\r |
| 857 | mk_decode_w16(1)\r |
| 858 | \r |
| 859 | #endif\r |
| 860 | \r |
| 861 | // backup RAM (fe0000 - feffff)\r |
| 862 | static u32 PicoReadS68k8_bram(u32 a)\r |
| 863 | {\r |
| 864 | return Pico_mcd->bram[(a>>1)&0x1fff];\r |
| 865 | }\r |
| 866 | \r |
| 867 | static u32 PicoReadS68k16_bram(u32 a)\r |
| 868 | {\r |
| 869 | u32 d;\r |
| 870 | elprintf(EL_ANOMALY, "FIXME: s68k_bram r16: [%06x] @%06x", a, SekPcS68k);\r |
| 871 | a = (a >> 1) & 0x1fff;\r |
| 872 | d = Pico_mcd->bram[a++];\r |
| 873 | d|= Pico_mcd->bram[a++] << 8; // probably wrong, TODO: verify\r |
| 874 | return d;\r |
| 875 | }\r |
| 876 | \r |
| 877 | static void PicoWriteS68k8_bram(u32 a, u32 d)\r |
| 878 | {\r |
| 879 | Pico_mcd->bram[(a >> 1) & 0x1fff] = d;\r |
| 880 | SRam.changed = 1;\r |
| 881 | }\r |
| 882 | \r |
| 883 | static void PicoWriteS68k16_bram(u32 a, u32 d)\r |
| 884 | {\r |
| 885 | elprintf(EL_ANOMALY, "s68k_bram w16: [%06x] %04x @%06x", a, d, SekPcS68k);\r |
| 886 | a = (a >> 1) & 0x1fff;\r |
| 887 | Pico_mcd->bram[a++] = d;\r |
| 888 | Pico_mcd->bram[a++] = d >> 8; // TODO: verify..\r |
| 889 | SRam.changed = 1;\r |
| 890 | }\r |
| 891 | \r |
| 892 | #ifndef _ASM_CD_MEMORY_C\r |
| 893 | \r |
| 894 | // PCM and registers (ff0000 - ffffff)\r |
| 895 | static u32 PicoReadS68k8_pr(u32 a)\r |
| 896 | {\r |
| 897 | u32 d = 0;\r |
| 898 | \r |
| 899 | // regs\r |
| 900 | if ((a & 0xfe00) == 0x8000) {\r |
| 901 | a &= 0x1ff;\r |
| 902 | if (a >= 0x0e && a < 0x30) {\r |
| 903 | d = Pico_mcd->s68k_regs[a];\r |
| 904 | s68k_poll_detect(a & ~1, d);\r |
| 905 | goto regs_done;\r |
| 906 | }\r |
| 907 | d = s68k_reg_read16(a & ~1);\r |
| 908 | if (!(a & 1))\r |
| 909 | d >>= 8;\r |
| 910 | \r |
| 911 | regs_done:\r |
| 912 | d &= 0xff;\r |
| 913 | elprintf(EL_CDREGS, "s68k_regs r8: [%02x] %02x @%06x",\r |
| 914 | a, d, SekPcS68k);\r |
| 915 | return d;\r |
| 916 | }\r |
| 917 | \r |
| 918 | // PCM\r |
| 919 | // XXX: verify: probably odd addrs only?\r |
| 920 | if ((a & 0x8000) == 0x0000) {\r |
| 921 | a &= 0x7fff;\r |
| 922 | if (a >= 0x2000)\r |
| 923 | d = Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a >> 1) & 0xfff];\r |
| 924 | else if (a >= 0x20)\r |
| 925 | d = pcd_pcm_read(a >> 1);\r |
| 926 | \r |
| 927 | return d;\r |
| 928 | }\r |
| 929 | \r |
| 930 | return s68k_unmapped_read8(a);\r |
| 931 | }\r |
| 932 | \r |
| 933 | static u32 PicoReadS68k16_pr(u32 a)\r |
| 934 | {\r |
| 935 | u32 d = 0;\r |
| 936 | \r |
| 937 | // regs\r |
| 938 | if ((a & 0xfe00) == 0x8000) {\r |
| 939 | a &= 0x1fe;\r |
| 940 | d = s68k_reg_read16(a);\r |
| 941 | \r |
| 942 | elprintf(EL_CDREGS, "s68k_regs r16: [%02x] %04x @%06x",\r |
| 943 | a, d, SekPcS68k);\r |
| 944 | return d;\r |
| 945 | }\r |
| 946 | \r |
| 947 | // PCM\r |
| 948 | if ((a & 0x8000) == 0x0000) {\r |
| 949 | a &= 0x7fff;\r |
| 950 | if (a >= 0x2000)\r |
| 951 | d = Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a >> 1) & 0xfff];\r |
| 952 | else if (a >= 0x20)\r |
| 953 | d = pcd_pcm_read(a >> 1);\r |
| 954 | \r |
| 955 | return d;\r |
| 956 | }\r |
| 957 | \r |
| 958 | return s68k_unmapped_read16(a);\r |
| 959 | }\r |
| 960 | \r |
| 961 | static void PicoWriteS68k8_pr(u32 a, u32 d)\r |
| 962 | {\r |
| 963 | // regs\r |
| 964 | if ((a & 0xfe00) == 0x8000) {\r |
| 965 | a &= 0x1ff;\r |
| 966 | elprintf(EL_CDREGS, "s68k_regs w8: [%02x] %02x @%06x", a, d, SekPcS68k);\r |
| 967 | if (0x59 <= a && a < 0x68) // word regs\r |
| 968 | s68k_reg_write16(a & ~1, (d << 8) | d);\r |
| 969 | else\r |
| 970 | s68k_reg_write8(a, d);\r |
| 971 | return;\r |
| 972 | }\r |
| 973 | \r |
| 974 | // PCM\r |
| 975 | if ((a & 0x8000) == 0x0000) {\r |
| 976 | a &= 0x7fff;\r |
| 977 | if (a >= 0x2000)\r |
| 978 | Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a>>1)&0xfff] = d;\r |
| 979 | else if (a < 0x12)\r |
| 980 | pcd_pcm_write(a>>1, d);\r |
| 981 | return;\r |
| 982 | }\r |
| 983 | \r |
| 984 | s68k_unmapped_write8(a, d);\r |
| 985 | }\r |
| 986 | \r |
| 987 | static void PicoWriteS68k16_pr(u32 a, u32 d)\r |
| 988 | {\r |
| 989 | // regs\r |
| 990 | if ((a & 0xfe00) == 0x8000) {\r |
| 991 | a &= 0x1fe;\r |
| 992 | elprintf(EL_CDREGS, "s68k_regs w16: [%02x] %04x @%06x", a, d, SekPcS68k);\r |
| 993 | s68k_reg_write16(a, d);\r |
| 994 | return;\r |
| 995 | }\r |
| 996 | \r |
| 997 | // PCM\r |
| 998 | if ((a & 0x8000) == 0x0000) {\r |
| 999 | a &= 0x7fff;\r |
| 1000 | if (a >= 0x2000)\r |
| 1001 | Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a>>1)&0xfff] = d;\r |
| 1002 | else if (a < 0x12)\r |
| 1003 | pcd_pcm_write(a>>1, d & 0xff);\r |
| 1004 | return;\r |
| 1005 | }\r |
| 1006 | \r |
| 1007 | s68k_unmapped_write16(a, d);\r |
| 1008 | }\r |
| 1009 | \r |
| 1010 | #endif\r |
| 1011 | \r |
| 1012 | static const void *m68k_cell_read8[] = { PicoReadM68k8_cell0, PicoReadM68k8_cell1 };\r |
| 1013 | static const void *m68k_cell_read16[] = { PicoReadM68k16_cell0, PicoReadM68k16_cell1 };\r |
| 1014 | static const void *m68k_cell_write8[] = { PicoWriteM68k8_cell0, PicoWriteM68k8_cell1 };\r |
| 1015 | static const void *m68k_cell_write16[] = { PicoWriteM68k16_cell0, PicoWriteM68k16_cell1 };\r |
| 1016 | \r |
| 1017 | static const void *s68k_dec_read8[] = { PicoReadS68k8_dec0, PicoReadS68k8_dec1 };\r |
| 1018 | static const void *s68k_dec_read16[] = { PicoReadS68k16_dec0, PicoReadS68k16_dec1 };\r |
| 1019 | \r |
| 1020 | static const void *s68k_dec_write8[2][4] = {\r |
| 1021 | { PicoWriteS68k8_dec_m0b0, PicoWriteS68k8_dec_m1b0, PicoWriteS68k8_dec_m2b0, PicoWriteS68k8_dec_m2b0 },\r |
| 1022 | { PicoWriteS68k8_dec_m0b1, PicoWriteS68k8_dec_m1b1, PicoWriteS68k8_dec_m2b1, PicoWriteS68k8_dec_m2b1 },\r |
| 1023 | };\r |
| 1024 | \r |
| 1025 | static const void *s68k_dec_write16[2][4] = {\r |
| 1026 | { PicoWriteS68k16_dec_m0b0, PicoWriteS68k16_dec_m1b0, PicoWriteS68k16_dec_m2b0, PicoWriteS68k16_dec_m2b0 },\r |
| 1027 | { PicoWriteS68k16_dec_m0b1, PicoWriteS68k16_dec_m1b1, PicoWriteS68k16_dec_m2b1, PicoWriteS68k16_dec_m2b1 },\r |
| 1028 | };\r |
| 1029 | \r |
| 1030 | // -----------------------------------------------------------------\r |
| 1031 | \r |
| 1032 | static void remap_prg_window(u32 r1, u32 r3)\r |
| 1033 | {\r |
| 1034 | // PRG RAM\r |
| 1035 | if (r1 & 2) {\r |
| 1036 | void *bank = Pico_mcd->prg_ram_b[(r3 >> 6) & 3];\r |
| 1037 | cpu68k_map_all_ram(0x020000, 0x03ffff, bank, 0);\r |
| 1038 | }\r |
| 1039 | else {\r |
| 1040 | m68k_map_unmap(0x020000, 0x03ffff);\r |
| 1041 | }\r |
| 1042 | }\r |
| 1043 | \r |
| 1044 | static void remap_word_ram(u32 r3)\r |
| 1045 | {\r |
| 1046 | void *bank;\r |
| 1047 | int i;\r |
| 1048 | \r |
| 1049 | // WORD RAM\r |
| 1050 | if (!(r3 & 4)) {\r |
| 1051 | // 2M mode. XXX: allowing access in all cases for simplicity\r |
| 1052 | bank = Pico_mcd->word_ram2M;\r |
| 1053 | cpu68k_map_all_ram(0x200000, 0x23ffff, bank, 0);\r |
| 1054 | cpu68k_map_all_ram(0x080000, 0x0bffff, bank, 1);\r |
| 1055 | // TODO: handle 0x0c0000\r |
| 1056 | }\r |
| 1057 | else {\r |
| 1058 | int b0 = r3 & 1;\r |
| 1059 | int m = (r3 & 0x18) >> 3;\r |
| 1060 | bank = Pico_mcd->word_ram1M[b0];\r |
| 1061 | cpu68k_map_all_ram(0x200000, 0x21ffff, bank, 0);\r |
| 1062 | bank = Pico_mcd->word_ram1M[b0 ^ 1];\r |
| 1063 | cpu68k_map_all_ram(0x0c0000, 0x0effff, bank, 1);\r |
| 1064 | // "cell arrange" on m68k\r |
| 1065 | cpu68k_map_set(m68k_read8_map, 0x220000, 0x23ffff, m68k_cell_read8[b0], 1);\r |
| 1066 | cpu68k_map_set(m68k_read16_map, 0x220000, 0x23ffff, m68k_cell_read16[b0], 1);\r |
| 1067 | cpu68k_map_set(m68k_write8_map, 0x220000, 0x23ffff, m68k_cell_write8[b0], 1);\r |
| 1068 | cpu68k_map_set(m68k_write16_map, 0x220000, 0x23ffff, m68k_cell_write16[b0], 1);\r |
| 1069 | // "decode format" on s68k\r |
| 1070 | cpu68k_map_set(s68k_read8_map, 0x080000, 0x0bffff, s68k_dec_read8[b0 ^ 1], 1);\r |
| 1071 | cpu68k_map_set(s68k_read16_map, 0x080000, 0x0bffff, s68k_dec_read16[b0 ^ 1], 1);\r |
| 1072 | cpu68k_map_set(s68k_write8_map, 0x080000, 0x0bffff, s68k_dec_write8[b0 ^ 1][m], 1);\r |
| 1073 | cpu68k_map_set(s68k_write16_map, 0x080000, 0x0bffff, s68k_dec_write16[b0 ^ 1][m], 1);\r |
| 1074 | }\r |
| 1075 | \r |
| 1076 | #ifdef EMU_F68K\r |
| 1077 | // update fetchmap..\r |
| 1078 | if (!(r3 & 4))\r |
| 1079 | {\r |
| 1080 | for (i = M68K_FETCHBANK1*2/16; (i<<(24-FAMEC_FETCHBITS)) < 0x240000; i++)\r |
| 1081 | PicoCpuFM68k.Fetch[i] = (unsigned long)Pico_mcd->word_ram2M - 0x200000;\r |
| 1082 | }\r |
| 1083 | else\r |
| 1084 | {\r |
| 1085 | for (i = M68K_FETCHBANK1*2/16; (i<<(24-FAMEC_FETCHBITS)) < 0x220000; i++)\r |
| 1086 | PicoCpuFM68k.Fetch[i] = (unsigned long)Pico_mcd->word_ram1M[r3 & 1] - 0x200000;\r |
| 1087 | for (i = M68K_FETCHBANK1*0x0c/0x100; (i<<(24-FAMEC_FETCHBITS)) < 0x0e0000; i++)\r |
| 1088 | PicoCpuFS68k.Fetch[i] = (unsigned long)Pico_mcd->word_ram1M[(r3&1)^1] - 0x0c0000;\r |
| 1089 | }\r |
| 1090 | #endif\r |
| 1091 | }\r |
| 1092 | \r |
| 1093 | void pcd_state_loaded_mem(void)\r |
| 1094 | {\r |
| 1095 | u32 r3 = Pico_mcd->s68k_regs[3];\r |
| 1096 | \r |
| 1097 | /* after load events */\r |
| 1098 | if (r3 & 4) // 1M mode?\r |
| 1099 | wram_2M_to_1M(Pico_mcd->word_ram2M);\r |
| 1100 | remap_word_ram(r3);\r |
| 1101 | remap_prg_window(Pico_mcd->m.busreq, r3);\r |
| 1102 | Pico_mcd->m.dmna_ret_2m &= 3;\r |
| 1103 | \r |
| 1104 | // restore hint vector\r |
| 1105 | *(unsigned short *)(Pico_mcd->bios + 0x72) = Pico_mcd->m.hint_vector;\r |
| 1106 | }\r |
| 1107 | \r |
| 1108 | #ifdef EMU_M68K\r |
| 1109 | static void m68k_mem_setup_cd(void);\r |
| 1110 | #endif\r |
| 1111 | \r |
| 1112 | PICO_INTERNAL void PicoMemSetupCD(void)\r |
| 1113 | {\r |
| 1114 | // setup default main68k map\r |
| 1115 | PicoMemSetup();\r |
| 1116 | \r |
| 1117 | // main68k map (BIOS mapped by PicoMemSetup()):\r |
| 1118 | // RAM cart\r |
| 1119 | if (PicoOpt & POPT_EN_MCD_RAMCART) {\r |
| 1120 | cpu68k_map_set(m68k_read8_map, 0x400000, 0x7fffff, PicoReadM68k8_ramc, 1);\r |
| 1121 | cpu68k_map_set(m68k_read16_map, 0x400000, 0x7fffff, PicoReadM68k16_ramc, 1);\r |
| 1122 | cpu68k_map_set(m68k_write8_map, 0x400000, 0x7fffff, PicoWriteM68k8_ramc, 1);\r |
| 1123 | cpu68k_map_set(m68k_write16_map, 0x400000, 0x7fffff, PicoWriteM68k16_ramc, 1);\r |
| 1124 | }\r |
| 1125 | \r |
| 1126 | // registers/IO:\r |
| 1127 | cpu68k_map_set(m68k_read8_map, 0xa10000, 0xa1ffff, PicoRead8_mcd_io, 1);\r |
| 1128 | cpu68k_map_set(m68k_read16_map, 0xa10000, 0xa1ffff, PicoRead16_mcd_io, 1);\r |
| 1129 | cpu68k_map_set(m68k_write8_map, 0xa10000, 0xa1ffff, PicoWrite8_mcd_io, 1);\r |
| 1130 | cpu68k_map_set(m68k_write16_map, 0xa10000, 0xa1ffff, PicoWrite16_mcd_io, 1);\r |
| 1131 | \r |
| 1132 | // sub68k map\r |
| 1133 | cpu68k_map_set(s68k_read8_map, 0x000000, 0xffffff, s68k_unmapped_read8, 1);\r |
| 1134 | cpu68k_map_set(s68k_read16_map, 0x000000, 0xffffff, s68k_unmapped_read16, 1);\r |
| 1135 | cpu68k_map_set(s68k_write8_map, 0x000000, 0xffffff, s68k_unmapped_write8, 1);\r |
| 1136 | cpu68k_map_set(s68k_write16_map, 0x000000, 0xffffff, s68k_unmapped_write16, 1);\r |
| 1137 | \r |
| 1138 | // PRG RAM\r |
| 1139 | cpu68k_map_set(s68k_read8_map, 0x000000, 0x07ffff, Pico_mcd->prg_ram, 0);\r |
| 1140 | cpu68k_map_set(s68k_read16_map, 0x000000, 0x07ffff, Pico_mcd->prg_ram, 0);\r |
| 1141 | cpu68k_map_set(s68k_write8_map, 0x000000, 0x07ffff, Pico_mcd->prg_ram, 0);\r |
| 1142 | cpu68k_map_set(s68k_write16_map, 0x000000, 0x07ffff, Pico_mcd->prg_ram, 0);\r |
| 1143 | cpu68k_map_set(s68k_write8_map, 0x000000, 0x01ffff, PicoWriteS68k8_prgwp, 1);\r |
| 1144 | cpu68k_map_set(s68k_write16_map, 0x000000, 0x01ffff, PicoWriteS68k16_prgwp, 1);\r |
| 1145 | \r |
| 1146 | // BRAM\r |
| 1147 | cpu68k_map_set(s68k_read8_map, 0xfe0000, 0xfeffff, PicoReadS68k8_bram, 1);\r |
| 1148 | cpu68k_map_set(s68k_read16_map, 0xfe0000, 0xfeffff, PicoReadS68k16_bram, 1);\r |
| 1149 | cpu68k_map_set(s68k_write8_map, 0xfe0000, 0xfeffff, PicoWriteS68k8_bram, 1);\r |
| 1150 | cpu68k_map_set(s68k_write16_map, 0xfe0000, 0xfeffff, PicoWriteS68k16_bram, 1);\r |
| 1151 | \r |
| 1152 | // PCM, regs\r |
| 1153 | cpu68k_map_set(s68k_read8_map, 0xff0000, 0xffffff, PicoReadS68k8_pr, 1);\r |
| 1154 | cpu68k_map_set(s68k_read16_map, 0xff0000, 0xffffff, PicoReadS68k16_pr, 1);\r |
| 1155 | cpu68k_map_set(s68k_write8_map, 0xff0000, 0xffffff, PicoWriteS68k8_pr, 1);\r |
| 1156 | cpu68k_map_set(s68k_write16_map, 0xff0000, 0xffffff, PicoWriteS68k16_pr, 1);\r |
| 1157 | \r |
| 1158 | // RAMs\r |
| 1159 | remap_word_ram(1);\r |
| 1160 | \r |
| 1161 | #ifdef EMU_C68K\r |
| 1162 | // s68k\r |
| 1163 | PicoCpuCS68k.read8 = (void *)s68k_read8_map;\r |
| 1164 | PicoCpuCS68k.read16 = (void *)s68k_read16_map;\r |
| 1165 | PicoCpuCS68k.read32 = (void *)s68k_read16_map;\r |
| 1166 | PicoCpuCS68k.write8 = (void *)s68k_write8_map;\r |
| 1167 | PicoCpuCS68k.write16 = (void *)s68k_write16_map;\r |
| 1168 | PicoCpuCS68k.write32 = (void *)s68k_write16_map;\r |
| 1169 | PicoCpuCS68k.checkpc = NULL; /* unused */\r |
| 1170 | PicoCpuCS68k.fetch8 = NULL;\r |
| 1171 | PicoCpuCS68k.fetch16 = NULL;\r |
| 1172 | PicoCpuCS68k.fetch32 = NULL;\r |
| 1173 | #endif\r |
| 1174 | #ifdef EMU_F68K\r |
| 1175 | // s68k\r |
| 1176 | PicoCpuFS68k.read_byte = s68k_read8;\r |
| 1177 | PicoCpuFS68k.read_word = s68k_read16;\r |
| 1178 | PicoCpuFS68k.read_long = s68k_read32;\r |
| 1179 | PicoCpuFS68k.write_byte = s68k_write8;\r |
| 1180 | PicoCpuFS68k.write_word = s68k_write16;\r |
| 1181 | PicoCpuFS68k.write_long = s68k_write32;\r |
| 1182 | \r |
| 1183 | // setup FAME fetchmap\r |
| 1184 | {\r |
| 1185 | int i;\r |
| 1186 | // M68k\r |
| 1187 | // by default, point everything to fitst 64k of ROM (BIOS)\r |
| 1188 | for (i = 0; i < M68K_FETCHBANK1; i++)\r |
| 1189 | PicoCpuFM68k.Fetch[i] = (unsigned long)Pico.rom - (i<<(24-FAMEC_FETCHBITS));\r |
| 1190 | // now real ROM (BIOS)\r |
| 1191 | for (i = 0; i < M68K_FETCHBANK1 && (i<<(24-FAMEC_FETCHBITS)) < Pico.romsize; i++)\r |
| 1192 | PicoCpuFM68k.Fetch[i] = (unsigned long)Pico.rom;\r |
| 1193 | // .. and RAM\r |
| 1194 | for (i = M68K_FETCHBANK1*14/16; i < M68K_FETCHBANK1; i++)\r |
| 1195 | PicoCpuFM68k.Fetch[i] = (unsigned long)Pico.ram - (i<<(24-FAMEC_FETCHBITS));\r |
| 1196 | // S68k\r |
| 1197 | // PRG RAM is default\r |
| 1198 | for (i = 0; i < M68K_FETCHBANK1; i++)\r |
| 1199 | PicoCpuFS68k.Fetch[i] = (unsigned long)Pico_mcd->prg_ram - (i<<(24-FAMEC_FETCHBITS));\r |
| 1200 | // real PRG RAM\r |
| 1201 | for (i = 0; i < M68K_FETCHBANK1 && (i<<(24-FAMEC_FETCHBITS)) < 0x80000; i++)\r |
| 1202 | PicoCpuFS68k.Fetch[i] = (unsigned long)Pico_mcd->prg_ram;\r |
| 1203 | // WORD RAM 2M area\r |
| 1204 | for (i = M68K_FETCHBANK1*0x08/0x100; i < M68K_FETCHBANK1 && (i<<(24-FAMEC_FETCHBITS)) < 0xc0000; i++)\r |
| 1205 | PicoCpuFS68k.Fetch[i] = (unsigned long)Pico_mcd->word_ram2M - 0x80000;\r |
| 1206 | // remap_word_ram() will setup word ram for both\r |
| 1207 | }\r |
| 1208 | #endif\r |
| 1209 | #ifdef EMU_M68K\r |
| 1210 | m68k_mem_setup_cd();\r |
| 1211 | #endif\r |
| 1212 | }\r |
| 1213 | \r |
| 1214 | \r |
| 1215 | #ifdef EMU_M68K\r |
| 1216 | u32 m68k_read8(u32 a);\r |
| 1217 | u32 m68k_read16(u32 a);\r |
| 1218 | u32 m68k_read32(u32 a);\r |
| 1219 | void m68k_write8(u32 a, u8 d);\r |
| 1220 | void m68k_write16(u32 a, u16 d);\r |
| 1221 | void m68k_write32(u32 a, u32 d);\r |
| 1222 | \r |
| 1223 | static unsigned int PicoReadCD8w (unsigned int a) {\r |
| 1224 | return m68ki_cpu_p == &PicoCpuMS68k ? s68k_read8(a) : m68k_read8(a);\r |
| 1225 | }\r |
| 1226 | static unsigned int PicoReadCD16w(unsigned int a) {\r |
| 1227 | return m68ki_cpu_p == &PicoCpuMS68k ? s68k_read16(a) : m68k_read16(a);\r |
| 1228 | }\r |
| 1229 | static unsigned int PicoReadCD32w(unsigned int a) {\r |
| 1230 | return m68ki_cpu_p == &PicoCpuMS68k ? s68k_read32(a) : m68k_read32(a);\r |
| 1231 | }\r |
| 1232 | static void PicoWriteCD8w (unsigned int a, unsigned char d) {\r |
| 1233 | if (m68ki_cpu_p == &PicoCpuMS68k) s68k_write8(a, d); else m68k_write8(a, d);\r |
| 1234 | }\r |
| 1235 | static void PicoWriteCD16w(unsigned int a, unsigned short d) {\r |
| 1236 | if (m68ki_cpu_p == &PicoCpuMS68k) s68k_write16(a, d); else m68k_write16(a, d);\r |
| 1237 | }\r |
| 1238 | static void PicoWriteCD32w(unsigned int a, unsigned int d) {\r |
| 1239 | if (m68ki_cpu_p == &PicoCpuMS68k) s68k_write32(a, d); else m68k_write32(a, d);\r |
| 1240 | }\r |
| 1241 | \r |
| 1242 | extern unsigned int (*pm68k_read_memory_8) (unsigned int address);\r |
| 1243 | extern unsigned int (*pm68k_read_memory_16)(unsigned int address);\r |
| 1244 | extern unsigned int (*pm68k_read_memory_32)(unsigned int address);\r |
| 1245 | extern void (*pm68k_write_memory_8) (unsigned int address, unsigned char value);\r |
| 1246 | extern void (*pm68k_write_memory_16)(unsigned int address, unsigned short value);\r |
| 1247 | extern void (*pm68k_write_memory_32)(unsigned int address, unsigned int value);\r |
| 1248 | \r |
| 1249 | static void m68k_mem_setup_cd(void)\r |
| 1250 | {\r |
| 1251 | pm68k_read_memory_8 = PicoReadCD8w;\r |
| 1252 | pm68k_read_memory_16 = PicoReadCD16w;\r |
| 1253 | pm68k_read_memory_32 = PicoReadCD32w;\r |
| 1254 | pm68k_write_memory_8 = PicoWriteCD8w;\r |
| 1255 | pm68k_write_memory_16 = PicoWriteCD16w;\r |
| 1256 | pm68k_write_memory_32 = PicoWriteCD32w;\r |
| 1257 | }\r |
| 1258 | #endif // EMU_M68K\r |
| 1259 | \r |
| 1260 | // vim:shiftwidth=2:ts=2:expandtab\r |