| 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 | #include "pcm.h"\r |
| 14 | \r |
| 15 | uptr s68k_read8_map [0x1000000 >> M68K_MEM_SHIFT];\r |
| 16 | uptr s68k_read16_map [0x1000000 >> M68K_MEM_SHIFT];\r |
| 17 | uptr s68k_write8_map [0x1000000 >> M68K_MEM_SHIFT];\r |
| 18 | uptr s68k_write16_map[0x1000000 >> M68K_MEM_SHIFT];\r |
| 19 | \r |
| 20 | MAKE_68K_READ8(s68k_read8, s68k_read8_map)\r |
| 21 | MAKE_68K_READ16(s68k_read16, s68k_read16_map)\r |
| 22 | MAKE_68K_READ32(s68k_read32, s68k_read16_map)\r |
| 23 | MAKE_68K_WRITE8(s68k_write8, s68k_write8_map)\r |
| 24 | MAKE_68K_WRITE16(s68k_write16, s68k_write16_map)\r |
| 25 | MAKE_68K_WRITE32(s68k_write32, s68k_write16_map)\r |
| 26 | \r |
| 27 | // -----------------------------------------------------------------\r |
| 28 | \r |
| 29 | // provided by ASM code:\r |
| 30 | #ifdef _ASM_CD_MEMORY_C\r |
| 31 | u32 PicoReadM68k8_io(u32 a);\r |
| 32 | u32 PicoReadM68k16_io(u32 a);\r |
| 33 | void PicoWriteM68k8_io(u32 a, u32 d);\r |
| 34 | void PicoWriteM68k16_io(u32 a, u32 d);\r |
| 35 | \r |
| 36 | u32 PicoReadS68k8_pr(u32 a);\r |
| 37 | u32 PicoReadS68k16_pr(u32 a);\r |
| 38 | void PicoWriteS68k8_pr(u32 a, u32 d);\r |
| 39 | void PicoWriteS68k16_pr(u32 a, u32 d);\r |
| 40 | \r |
| 41 | u32 PicoReadM68k8_cell0(u32 a);\r |
| 42 | u32 PicoReadM68k8_cell1(u32 a);\r |
| 43 | u32 PicoReadM68k16_cell0(u32 a);\r |
| 44 | u32 PicoReadM68k16_cell1(u32 a);\r |
| 45 | void PicoWriteM68k8_cell0(u32 a, u32 d);\r |
| 46 | void PicoWriteM68k8_cell1(u32 a, u32 d);\r |
| 47 | void PicoWriteM68k16_cell0(u32 a, u32 d);\r |
| 48 | void PicoWriteM68k16_cell1(u32 a, u32 d);\r |
| 49 | \r |
| 50 | u32 PicoReadS68k8_dec0(u32 a);\r |
| 51 | u32 PicoReadS68k8_dec1(u32 a);\r |
| 52 | u32 PicoReadS68k16_dec0(u32 a);\r |
| 53 | u32 PicoReadS68k16_dec1(u32 a);\r |
| 54 | void PicoWriteS68k8_dec_m0b0(u32 a, u32 d);\r |
| 55 | void PicoWriteS68k8_dec_m1b0(u32 a, u32 d);\r |
| 56 | void PicoWriteS68k8_dec_m2b0(u32 a, u32 d);\r |
| 57 | void PicoWriteS68k8_dec_m0b1(u32 a, u32 d);\r |
| 58 | void PicoWriteS68k8_dec_m1b1(u32 a, u32 d);\r |
| 59 | void PicoWriteS68k8_dec_m2b1(u32 a, u32 d);\r |
| 60 | void PicoWriteS68k16_dec_m0b0(u32 a, u32 d);\r |
| 61 | void PicoWriteS68k16_dec_m1b0(u32 a, u32 d);\r |
| 62 | void PicoWriteS68k16_dec_m2b0(u32 a, u32 d);\r |
| 63 | void PicoWriteS68k16_dec_m0b1(u32 a, u32 d);\r |
| 64 | void PicoWriteS68k16_dec_m1b1(u32 a, u32 d);\r |
| 65 | void PicoWriteS68k16_dec_m2b1(u32 a, u32 d);\r |
| 66 | #endif\r |
| 67 | \r |
| 68 | static void remap_prg_window(void);\r |
| 69 | static void remap_word_ram(int r3);\r |
| 70 | \r |
| 71 | // poller detection\r |
| 72 | #define POLL_LIMIT 16\r |
| 73 | #define POLL_CYCLES 124\r |
| 74 | unsigned int s68k_poll_adclk, s68k_poll_cnt;\r |
| 75 | \r |
| 76 | void m68k_comm_check(u32 a)\r |
| 77 | {\r |
| 78 | pcd_sync_s68k(SekCyclesDone());\r |
| 79 | /*if (Pico_mcd->m.m68k_comm_dirty & (1 << a/2)) {\r |
| 80 | Pico_mcd->m.m68k_comm_dirty &= ~(1 << a/2);\r |
| 81 | Pico_mcd->m.m68k_poll_a = Pico_mcd->m.m68k_poll_cnt = 0;\r |
| 82 | return;\r |
| 83 | }\r |
| 84 | if (a != Pico_mcd->m.m68k_poll_a) {\r |
| 85 | Pico_mcd->m.m68k_poll_a = a;\r |
| 86 | Pico_mcd->m.m68k_poll_cnt = 0;\r |
| 87 | return;\r |
| 88 | }\r |
| 89 | if (++Pico_mcd->m.m68k_poll_cnt > 5)\r |
| 90 | SekCyclesBurnRun(122);\r |
| 91 | \r |
| 92 | elprintf(EL_CDPOLL, "m68k poll [%02x] %d %u", a,\r |
| 93 | Pico_mcd->m.m68k_poll_cnt, SekCyclesDone());*/\r |
| 94 | }\r |
| 95 | \r |
| 96 | #ifndef _ASM_CD_MEMORY_C\r |
| 97 | static u32 m68k_reg_read16(u32 a)\r |
| 98 | {\r |
| 99 | u32 d=0;\r |
| 100 | a &= 0x3e;\r |
| 101 | \r |
| 102 | switch (a) {\r |
| 103 | case 0:\r |
| 104 | d = ((Pico_mcd->s68k_regs[0x33]<<13)&0x8000) | Pico_mcd->m.busreq; // here IFL2 is always 0, just like in Gens\r |
| 105 | goto end;\r |
| 106 | case 2:\r |
| 107 | m68k_comm_check(a);\r |
| 108 | d = (Pico_mcd->s68k_regs[a]<<8) | (Pico_mcd->s68k_regs[a+1]&0xc7);\r |
| 109 | elprintf(EL_CDREG3, "m68k_regs r3: %02x @%06x", (u8)d, SekPc);\r |
| 110 | goto end;\r |
| 111 | case 4:\r |
| 112 | d = Pico_mcd->s68k_regs[4]<<8;\r |
| 113 | goto end;\r |
| 114 | case 6:\r |
| 115 | d = *(u16 *)(Pico_mcd->bios + 0x72);\r |
| 116 | goto end;\r |
| 117 | case 8:\r |
| 118 | d = Read_CDC_Host(0);\r |
| 119 | goto end;\r |
| 120 | case 0xA:\r |
| 121 | elprintf(EL_UIO, "m68k FIXME: reserved read");\r |
| 122 | goto end;\r |
| 123 | case 0xC: // 384 cycle stopwatch timer\r |
| 124 | // ugh..\r |
| 125 | d = pcd_cycles_m68k_to_s68k(SekCyclesDone());\r |
| 126 | d = (d - Pico_mcd->m.stopwatch_base_c) / 384;\r |
| 127 | d &= 0x0fff;\r |
| 128 | elprintf(EL_CDREGS, "m68k stopwatch timer read (%04x)", d);\r |
| 129 | goto end;\r |
| 130 | }\r |
| 131 | \r |
| 132 | if (a < 0x30) {\r |
| 133 | // comm flag/cmd/status (0xE-0x2F)\r |
| 134 | m68k_comm_check(a);\r |
| 135 | d = (Pico_mcd->s68k_regs[a]<<8) | Pico_mcd->s68k_regs[a+1];\r |
| 136 | goto end;\r |
| 137 | }\r |
| 138 | \r |
| 139 | elprintf(EL_UIO, "m68k_regs FIXME invalid read @ %02x", a);\r |
| 140 | \r |
| 141 | end:\r |
| 142 | \r |
| 143 | return d;\r |
| 144 | }\r |
| 145 | #endif\r |
| 146 | \r |
| 147 | #ifndef _ASM_CD_MEMORY_C\r |
| 148 | static\r |
| 149 | #endif\r |
| 150 | void m68k_reg_write8(u32 a, u32 d)\r |
| 151 | {\r |
| 152 | u32 dold;\r |
| 153 | a &= 0x3f;\r |
| 154 | \r |
| 155 | Pico_mcd->m.m68k_poll_a = 0;\r |
| 156 | \r |
| 157 | switch (a) {\r |
| 158 | case 0:\r |
| 159 | d &= 1;\r |
| 160 | if ((d&1) && (Pico_mcd->s68k_regs[0x33]&(1<<2))) { elprintf(EL_INTS, "m68k: s68k irq 2"); SekInterruptS68k(2); }\r |
| 161 | return;\r |
| 162 | case 1:\r |
| 163 | d &= 3;\r |
| 164 | elprintf(EL_CDREGS, "d m.busreq %u %u", d, Pico_mcd->m.busreq);\r |
| 165 | if (d == Pico_mcd->m.busreq)\r |
| 166 | return;\r |
| 167 | pcd_sync_s68k(SekCyclesDone());\r |
| 168 | \r |
| 169 | if ((Pico_mcd->m.busreq ^ d) & 1) {\r |
| 170 | elprintf(EL_INTSW, "m68k: s68k reset %i", !(d&1));\r |
| 171 | if (!(d & 1))\r |
| 172 | d |= 2; // verified: reset also gives bus\r |
| 173 | else {\r |
| 174 | elprintf(EL_CDREGS, "m68k: resetting s68k");\r |
| 175 | SekResetS68k();\r |
| 176 | }\r |
| 177 | }\r |
| 178 | if ((Pico_mcd->m.busreq ^ d) & 2) {\r |
| 179 | elprintf(EL_INTSW, "m68k: s68k brq %i", d >> 1);\r |
| 180 | remap_prg_window();\r |
| 181 | }\r |
| 182 | Pico_mcd->m.busreq = d;\r |
| 183 | return;\r |
| 184 | case 2:\r |
| 185 | elprintf(EL_CDREGS, "m68k: prg wp=%02x", d);\r |
| 186 | Pico_mcd->s68k_regs[2] = d; // really use s68k side register\r |
| 187 | return;\r |
| 188 | case 3:\r |
| 189 | dold = Pico_mcd->s68k_regs[3];\r |
| 190 | elprintf(EL_CDREG3, "m68k_regs w3: %02x @%06x", (u8)d, SekPc);\r |
| 191 | //if ((Pico_mcd->s68k_regs[3]&4) != (d&4)) dprintf("m68k: ram mode %i mbit", (d&4) ? 1 : 2);\r |
| 192 | //if ((Pico_mcd->s68k_regs[3]&2) != (d&2)) dprintf("m68k: %s", (d&4) ? ((d&2) ? "word swap req" : "noop?") :\r |
| 193 | // ((d&2) ? "word ram to s68k" : "word ram to m68k"));\r |
| 194 | if (dold & 4) { // 1M mode\r |
| 195 | d ^= 2; // writing 0 to DMNA actually sets it, 1 does nothing\r |
| 196 | } else {\r |
| 197 | if ((d ^ dold) & d & 2) { // DMNA is being set\r |
| 198 | dold &= ~1; // return word RAM to s68k\r |
| 199 | /* Silpheed hack: bset(w3), r3, btst, bne, r3 */\r |
| 200 | SekEndRun(20+16+10+12+16);\r |
| 201 | }\r |
| 202 | }\r |
| 203 | Pico_mcd->s68k_regs[3] = (d & 0xc2) | (dold & 0x1f);\r |
| 204 | if ((d ^ dold) & 0xc0) {\r |
| 205 | elprintf(EL_CDREGS, "m68k: prg bank: %i -> %i", (Pico_mcd->s68k_regs[a]>>6), ((d>>6)&3));\r |
| 206 | remap_prg_window();\r |
| 207 | }\r |
| 208 | #ifdef USE_POLL_DETECT\r |
| 209 | if ((s68k_poll_adclk&0xfe) == 2 && s68k_poll_cnt > POLL_LIMIT) {\r |
| 210 | SekSetStopS68k(0); s68k_poll_adclk = 0;\r |
| 211 | elprintf(EL_CDPOLL, "s68k poll release, a=%02x", a);\r |
| 212 | }\r |
| 213 | #endif\r |
| 214 | return;\r |
| 215 | case 6:\r |
| 216 | Pico_mcd->bios[0x72 + 1] = d; // simple hint vector changer\r |
| 217 | return;\r |
| 218 | case 7:\r |
| 219 | Pico_mcd->bios[0x72] = d;\r |
| 220 | elprintf(EL_CDREGS, "hint vector set to %04x%04x",\r |
| 221 | ((u16 *)Pico_mcd->bios)[0x70/2], ((u16 *)Pico_mcd->bios)[0x72/2]);\r |
| 222 | return;\r |
| 223 | case 0xf:\r |
| 224 | d = (d << 1) | ((d >> 7) & 1); // rol8 1 (special case)\r |
| 225 | case 0xe:\r |
| 226 | if (d != Pico_mcd->s68k_regs[0xe]) {\r |
| 227 | pcd_sync_s68k(SekCyclesDone());\r |
| 228 | Pico_mcd->s68k_regs[0xe] = d;\r |
| 229 | }\r |
| 230 | #ifdef USE_POLL_DETECT\r |
| 231 | if ((s68k_poll_adclk&0xfe) == 0xe && s68k_poll_cnt > POLL_LIMIT) {\r |
| 232 | SekSetStopS68k(0); s68k_poll_adclk = 0;\r |
| 233 | elprintf(EL_CDPOLL, "s68k poll release, a=%02x", a);\r |
| 234 | }\r |
| 235 | #endif\r |
| 236 | return;\r |
| 237 | }\r |
| 238 | \r |
| 239 | if ((a&0xf0) == 0x10) {\r |
| 240 | Pico_mcd->s68k_regs[a] = d;\r |
| 241 | #ifdef USE_POLL_DETECT\r |
| 242 | if ((a&0xfe) == (s68k_poll_adclk&0xfe) && s68k_poll_cnt > POLL_LIMIT) {\r |
| 243 | SekSetStopS68k(0); s68k_poll_adclk = 0;\r |
| 244 | elprintf(EL_CDPOLL, "s68k poll release, a=%02x", a);\r |
| 245 | }\r |
| 246 | #endif\r |
| 247 | return;\r |
| 248 | }\r |
| 249 | \r |
| 250 | elprintf(EL_UIO, "m68k FIXME: invalid write? [%02x] %02x", a, d);\r |
| 251 | }\r |
| 252 | \r |
| 253 | #ifndef _ASM_CD_MEMORY_C\r |
| 254 | static\r |
| 255 | #endif\r |
| 256 | u32 s68k_poll_detect(u32 a, u32 d)\r |
| 257 | {\r |
| 258 | #ifdef USE_POLL_DETECT\r |
| 259 | // needed mostly for Cyclone, which doesn't always check it's cycle counter\r |
| 260 | if (SekIsStoppedS68k()) return d;\r |
| 261 | // polling detection\r |
| 262 | if (a == (s68k_poll_adclk&0xff)) {\r |
| 263 | unsigned int clkdiff = SekCyclesDoneS68k() - (s68k_poll_adclk>>8);\r |
| 264 | if (clkdiff <= POLL_CYCLES) {\r |
| 265 | s68k_poll_cnt++;\r |
| 266 | //printf("-- diff: %u, cnt = %i\n", clkdiff, s68k_poll_cnt);\r |
| 267 | if (s68k_poll_cnt > POLL_LIMIT) {\r |
| 268 | SekSetStopS68k(1);\r |
| 269 | elprintf(EL_CDPOLL, "s68k poll detected @ %06x, a=%02x", SekPcS68k, a);\r |
| 270 | }\r |
| 271 | s68k_poll_adclk = (SekCyclesDoneS68k() << 8) | a;\r |
| 272 | return d;\r |
| 273 | }\r |
| 274 | }\r |
| 275 | s68k_poll_adclk = (SekCyclesDoneS68k() << 8) | a;\r |
| 276 | s68k_poll_cnt = 0;\r |
| 277 | #endif\r |
| 278 | return d;\r |
| 279 | }\r |
| 280 | \r |
| 281 | #define READ_FONT_DATA(basemask) \\r |
| 282 | { \\r |
| 283 | unsigned int fnt = *(unsigned int *)(Pico_mcd->s68k_regs + 0x4c); \\r |
| 284 | unsigned int col0 = (fnt >> 8) & 0x0f, col1 = (fnt >> 12) & 0x0f; \\r |
| 285 | if (fnt & (basemask << 0)) d = col1 ; else d = col0; \\r |
| 286 | if (fnt & (basemask << 1)) d |= col1 << 4; else d |= col0 << 4; \\r |
| 287 | if (fnt & (basemask << 2)) d |= col1 << 8; else d |= col0 << 8; \\r |
| 288 | if (fnt & (basemask << 3)) d |= col1 << 12; else d |= col0 << 12; \\r |
| 289 | }\r |
| 290 | \r |
| 291 | \r |
| 292 | #ifndef _ASM_CD_MEMORY_C\r |
| 293 | static\r |
| 294 | #endif\r |
| 295 | u32 s68k_reg_read16(u32 a)\r |
| 296 | {\r |
| 297 | u32 d=0;\r |
| 298 | \r |
| 299 | switch (a) {\r |
| 300 | case 0:\r |
| 301 | return ((Pico_mcd->s68k_regs[0]&3)<<8) | 1; // ver = 0, not in reset state\r |
| 302 | case 2:\r |
| 303 | d = (Pico_mcd->s68k_regs[2]<<8) | (Pico_mcd->s68k_regs[3]&0x1f);\r |
| 304 | elprintf(EL_CDREG3, "s68k_regs r3: %02x @%06x", (u8)d, SekPcS68k);\r |
| 305 | return s68k_poll_detect(a, d);\r |
| 306 | case 6:\r |
| 307 | return CDC_Read_Reg();\r |
| 308 | case 8:\r |
| 309 | return Read_CDC_Host(1); // Gens returns 0 here on byte reads\r |
| 310 | case 0xC:\r |
| 311 | d = SekCyclesDoneS68k() - Pico_mcd->m.stopwatch_base_c;\r |
| 312 | d /= 384;\r |
| 313 | d &= 0x0fff;\r |
| 314 | elprintf(EL_CDREGS, "s68k stopwatch timer read (%04x)", d);\r |
| 315 | return d;\r |
| 316 | case 0x30:\r |
| 317 | elprintf(EL_CDREGS, "s68k int3 timer read (%02x)", Pico_mcd->s68k_regs[31]);\r |
| 318 | return Pico_mcd->s68k_regs[31];\r |
| 319 | case 0x34: // fader\r |
| 320 | return 0; // no busy bit\r |
| 321 | case 0x50: // font data (check: Lunar 2, Silpheed)\r |
| 322 | READ_FONT_DATA(0x00100000);\r |
| 323 | return d;\r |
| 324 | case 0x52:\r |
| 325 | READ_FONT_DATA(0x00010000);\r |
| 326 | return d;\r |
| 327 | case 0x54:\r |
| 328 | READ_FONT_DATA(0x10000000);\r |
| 329 | return d;\r |
| 330 | case 0x56:\r |
| 331 | READ_FONT_DATA(0x01000000);\r |
| 332 | return d;\r |
| 333 | }\r |
| 334 | \r |
| 335 | d = (Pico_mcd->s68k_regs[a]<<8) | Pico_mcd->s68k_regs[a+1];\r |
| 336 | \r |
| 337 | if (a >= 0x0e && a < 0x30)\r |
| 338 | return s68k_poll_detect(a, d);\r |
| 339 | \r |
| 340 | return d;\r |
| 341 | }\r |
| 342 | \r |
| 343 | #ifndef _ASM_CD_MEMORY_C\r |
| 344 | static\r |
| 345 | #endif\r |
| 346 | void s68k_reg_write8(u32 a, u32 d)\r |
| 347 | {\r |
| 348 | // Warning: d might have upper bits set\r |
| 349 | switch (a) {\r |
| 350 | case 2:\r |
| 351 | return; // only m68k can change WP\r |
| 352 | case 3: {\r |
| 353 | int dold = Pico_mcd->s68k_regs[3];\r |
| 354 | elprintf(EL_CDREG3, "s68k_regs w3: %02x @%06x", (u8)d, SekPcS68k);\r |
| 355 | d &= 0x1d;\r |
| 356 | d |= dold & 0xc2;\r |
| 357 | if (d & 4)\r |
| 358 | {\r |
| 359 | if ((d ^ dold) & 0x1d) {\r |
| 360 | d &= ~2; // in case of mode or bank change we clear DMNA (m68k req) bit\r |
| 361 | remap_word_ram(d);\r |
| 362 | }\r |
| 363 | if (!(dold & 4)) {\r |
| 364 | elprintf(EL_CDREG3, "wram mode 2M->1M");\r |
| 365 | wram_2M_to_1M(Pico_mcd->word_ram2M);\r |
| 366 | }\r |
| 367 | }\r |
| 368 | else\r |
| 369 | {\r |
| 370 | if (dold & 4) {\r |
| 371 | elprintf(EL_CDREG3, "wram mode 1M->2M");\r |
| 372 | if (!(d&1)) { // it didn't set the ret bit, which means it doesn't want to give WRAM to m68k\r |
| 373 | d &= ~3;\r |
| 374 | d |= (dold&1) ? 2 : 1; // then give it to the one which had bank0 in 1M mode\r |
| 375 | }\r |
| 376 | wram_1M_to_2M(Pico_mcd->word_ram2M);\r |
| 377 | remap_word_ram(d);\r |
| 378 | }\r |
| 379 | // s68k can only set RET, writing 0 has no effect\r |
| 380 | else if ((dold ^ d) & d & 1) { // RET being set\r |
| 381 | SekEndRunS68k(20+16+10+12+16); // see DMNA case\r |
| 382 | } else\r |
| 383 | d |= dold & 1;\r |
| 384 | if (d & 1)\r |
| 385 | d &= ~2; // DMNA clears\r |
| 386 | }\r |
| 387 | break;\r |
| 388 | }\r |
| 389 | case 4:\r |
| 390 | elprintf(EL_CDREGS, "s68k CDC dest: %x", d&7);\r |
| 391 | Pico_mcd->s68k_regs[4] = (Pico_mcd->s68k_regs[4]&0xC0) | (d&7); // CDC mode\r |
| 392 | return;\r |
| 393 | case 5:\r |
| 394 | //dprintf("s68k CDC reg addr: %x", d&0xf);\r |
| 395 | break;\r |
| 396 | case 7:\r |
| 397 | CDC_Write_Reg(d);\r |
| 398 | return;\r |
| 399 | case 0xa:\r |
| 400 | elprintf(EL_CDREGS, "s68k set CDC dma addr");\r |
| 401 | break;\r |
| 402 | case 0xc:\r |
| 403 | case 0xd: // 384 cycle stopwatch timer\r |
| 404 | elprintf(EL_CDREGS|EL_CD, "s68k clear stopwatch (%x)", d);\r |
| 405 | // does this also reset internal 384 cycle counter?\r |
| 406 | Pico_mcd->m.stopwatch_base_c = SekCyclesDoneS68k();\r |
| 407 | return;\r |
| 408 | case 0xe:\r |
| 409 | d = (d>>1) | (d<<7); // ror8 1, Gens note: Dragons lair\r |
| 410 | break;\r |
| 411 | case 0x31: // 384 cycle int3 timer\r |
| 412 | d &= 0xff;\r |
| 413 | elprintf(EL_CDREGS|EL_CD, "s68k set int3 timer: %02x", d);\r |
| 414 | Pico_mcd->s68k_regs[a] = (u8) d;\r |
| 415 | if (d) // d or d+1??\r |
| 416 | pcd_event_schedule_s68k(PCD_EVENT_TIMER3, d * 384);\r |
| 417 | else\r |
| 418 | pcd_event_schedule(0, PCD_EVENT_TIMER3, 0);\r |
| 419 | break;\r |
| 420 | case 0x33: // IRQ mask\r |
| 421 | elprintf(EL_CDREGS|EL_CD, "s68k irq mask: %02x", d);\r |
| 422 | d &= 0x7e;\r |
| 423 | if ((d ^ Pico_mcd->s68k_regs[0x33]) & d & PCDS_IEN4) {\r |
| 424 | if (Pico_mcd->s68k_regs[0x37] & 4)\r |
| 425 | CDD_Export_Status();\r |
| 426 | }\r |
| 427 | break;\r |
| 428 | case 0x34: // fader\r |
| 429 | Pico_mcd->s68k_regs[a] = (u8) d & 0x7f;\r |
| 430 | return;\r |
| 431 | case 0x36:\r |
| 432 | return; // d/m bit is unsetable\r |
| 433 | case 0x37: {\r |
| 434 | u32 d_old = Pico_mcd->s68k_regs[0x37];\r |
| 435 | Pico_mcd->s68k_regs[0x37] = d&7;\r |
| 436 | if ((d&4) && !(d_old&4)) {\r |
| 437 | CDD_Export_Status();\r |
| 438 | }\r |
| 439 | return;\r |
| 440 | }\r |
| 441 | case 0x4b:\r |
| 442 | Pico_mcd->s68k_regs[a] = (u8) d;\r |
| 443 | CDD_Import_Command();\r |
| 444 | return;\r |
| 445 | }\r |
| 446 | \r |
| 447 | if ((a&0x1f0) == 0x10 || (a >= 0x38 && a < 0x42))\r |
| 448 | {\r |
| 449 | elprintf(EL_UIO, "s68k FIXME: invalid write @ %02x?", a);\r |
| 450 | return;\r |
| 451 | }\r |
| 452 | \r |
| 453 | if (a < 0x30)\r |
| 454 | Pico_mcd->m.m68k_comm_dirty |= (1 << a/2);\r |
| 455 | \r |
| 456 | Pico_mcd->s68k_regs[a] = (u8) d;\r |
| 457 | }\r |
| 458 | \r |
| 459 | // -----------------------------------------------------------------\r |
| 460 | // Main 68k\r |
| 461 | // -----------------------------------------------------------------\r |
| 462 | \r |
| 463 | #ifndef _ASM_CD_MEMORY_C\r |
| 464 | #include "cell_map.c"\r |
| 465 | \r |
| 466 | // WORD RAM, cell aranged area (220000 - 23ffff)\r |
| 467 | static u32 PicoReadM68k8_cell0(u32 a)\r |
| 468 | {\r |
| 469 | a = (a&3) | (cell_map(a >> 2) << 2); // cell arranged\r |
| 470 | return Pico_mcd->word_ram1M[0][a ^ 1];\r |
| 471 | }\r |
| 472 | \r |
| 473 | static u32 PicoReadM68k8_cell1(u32 a)\r |
| 474 | {\r |
| 475 | a = (a&3) | (cell_map(a >> 2) << 2);\r |
| 476 | return Pico_mcd->word_ram1M[1][a ^ 1];\r |
| 477 | }\r |
| 478 | \r |
| 479 | static u32 PicoReadM68k16_cell0(u32 a)\r |
| 480 | {\r |
| 481 | a = (a&2) | (cell_map(a >> 2) << 2);\r |
| 482 | return *(u16 *)(Pico_mcd->word_ram1M[0] + a);\r |
| 483 | }\r |
| 484 | \r |
| 485 | static u32 PicoReadM68k16_cell1(u32 a)\r |
| 486 | {\r |
| 487 | a = (a&2) | (cell_map(a >> 2) << 2);\r |
| 488 | return *(u16 *)(Pico_mcd->word_ram1M[1] + a);\r |
| 489 | }\r |
| 490 | \r |
| 491 | static void PicoWriteM68k8_cell0(u32 a, u32 d)\r |
| 492 | {\r |
| 493 | a = (a&3) | (cell_map(a >> 2) << 2);\r |
| 494 | Pico_mcd->word_ram1M[0][a ^ 1] = d;\r |
| 495 | }\r |
| 496 | \r |
| 497 | static void PicoWriteM68k8_cell1(u32 a, u32 d)\r |
| 498 | {\r |
| 499 | a = (a&3) | (cell_map(a >> 2) << 2);\r |
| 500 | Pico_mcd->word_ram1M[1][a ^ 1] = d;\r |
| 501 | }\r |
| 502 | \r |
| 503 | static void PicoWriteM68k16_cell0(u32 a, u32 d)\r |
| 504 | {\r |
| 505 | a = (a&3) | (cell_map(a >> 2) << 2);\r |
| 506 | *(u16 *)(Pico_mcd->word_ram1M[0] + a) = d;\r |
| 507 | }\r |
| 508 | \r |
| 509 | static void PicoWriteM68k16_cell1(u32 a, u32 d)\r |
| 510 | {\r |
| 511 | a = (a&3) | (cell_map(a >> 2) << 2);\r |
| 512 | *(u16 *)(Pico_mcd->word_ram1M[1] + a) = d;\r |
| 513 | }\r |
| 514 | #endif\r |
| 515 | \r |
| 516 | // RAM cart (40000 - 7fffff, optional)\r |
| 517 | static u32 PicoReadM68k8_ramc(u32 a)\r |
| 518 | {\r |
| 519 | u32 d = 0;\r |
| 520 | if (a == 0x400001) {\r |
| 521 | if (SRam.data != NULL)\r |
| 522 | d = 3; // 64k cart\r |
| 523 | return d;\r |
| 524 | }\r |
| 525 | \r |
| 526 | if ((a & 0xfe0000) == 0x600000) {\r |
| 527 | if (SRam.data != NULL)\r |
| 528 | d = SRam.data[((a >> 1) & 0xffff) + 0x2000];\r |
| 529 | return d;\r |
| 530 | }\r |
| 531 | \r |
| 532 | if (a == 0x7fffff)\r |
| 533 | return Pico_mcd->m.bcram_reg;\r |
| 534 | \r |
| 535 | elprintf(EL_UIO, "m68k unmapped r8 [%06x] @%06x", a, SekPc);\r |
| 536 | return d;\r |
| 537 | }\r |
| 538 | \r |
| 539 | static u32 PicoReadM68k16_ramc(u32 a)\r |
| 540 | {\r |
| 541 | elprintf(EL_ANOMALY, "ramcart r16: [%06x] @%06x", a, SekPcS68k);\r |
| 542 | return PicoReadM68k8_ramc(a + 1);\r |
| 543 | }\r |
| 544 | \r |
| 545 | static void PicoWriteM68k8_ramc(u32 a, u32 d)\r |
| 546 | {\r |
| 547 | if ((a & 0xfe0000) == 0x600000) {\r |
| 548 | if (SRam.data != NULL && (Pico_mcd->m.bcram_reg & 1)) {\r |
| 549 | SRam.data[((a>>1) & 0xffff) + 0x2000] = d;\r |
| 550 | SRam.changed = 1;\r |
| 551 | }\r |
| 552 | return;\r |
| 553 | }\r |
| 554 | \r |
| 555 | if (a == 0x7fffff) {\r |
| 556 | Pico_mcd->m.bcram_reg = d;\r |
| 557 | return;\r |
| 558 | }\r |
| 559 | \r |
| 560 | elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);\r |
| 561 | }\r |
| 562 | \r |
| 563 | static void PicoWriteM68k16_ramc(u32 a, u32 d)\r |
| 564 | {\r |
| 565 | elprintf(EL_ANOMALY, "ramcart w16: [%06x] %04x @%06x", a, d, SekPcS68k);\r |
| 566 | PicoWriteM68k8_ramc(a + 1, d);\r |
| 567 | }\r |
| 568 | \r |
| 569 | // IO/control/cd registers (a10000 - ...)\r |
| 570 | #ifndef _ASM_CD_MEMORY_C\r |
| 571 | static u32 PicoReadM68k8_io(u32 a)\r |
| 572 | {\r |
| 573 | u32 d;\r |
| 574 | if ((a & 0xff00) == 0x2000) { // a12000 - a120ff\r |
| 575 | d = m68k_reg_read16(a); // TODO: m68k_reg_read8\r |
| 576 | if (!(a & 1))\r |
| 577 | d >>= 8;\r |
| 578 | d &= 0xff;\r |
| 579 | elprintf(EL_CDREGS, "m68k_regs r8: [%02x] %02x @%06x", a & 0x3f, d, SekPc);\r |
| 580 | return d;\r |
| 581 | }\r |
| 582 | \r |
| 583 | // fallback to default MD handler\r |
| 584 | return PicoRead8_io(a);\r |
| 585 | }\r |
| 586 | \r |
| 587 | static u32 PicoReadM68k16_io(u32 a)\r |
| 588 | {\r |
| 589 | u32 d;\r |
| 590 | if ((a & 0xff00) == 0x2000) {\r |
| 591 | d = m68k_reg_read16(a);\r |
| 592 | elprintf(EL_CDREGS, "m68k_regs r16: [%02x] %04x @%06x", a & 0x3f, d, SekPc);\r |
| 593 | return d;\r |
| 594 | }\r |
| 595 | \r |
| 596 | return PicoRead16_io(a);\r |
| 597 | }\r |
| 598 | \r |
| 599 | static void PicoWriteM68k8_io(u32 a, u32 d)\r |
| 600 | {\r |
| 601 | if ((a & 0xff00) == 0x2000) { // a12000 - a120ff\r |
| 602 | elprintf(EL_CDREGS, "m68k_regs w8: [%02x] %02x @%06x", a&0x3f, d, SekPc);\r |
| 603 | m68k_reg_write8(a, d);\r |
| 604 | return;\r |
| 605 | }\r |
| 606 | \r |
| 607 | PicoWrite16_io(a, d);\r |
| 608 | }\r |
| 609 | \r |
| 610 | static void PicoWriteM68k16_io(u32 a, u32 d)\r |
| 611 | {\r |
| 612 | if ((a & 0xff00) == 0x2000) { // a12000 - a120ff\r |
| 613 | elprintf(EL_CDREGS, "m68k_regs w16: [%02x] %04x @%06x", a&0x3f, d, SekPc);\r |
| 614 | /* TODO FIXME?\r |
| 615 | if (a == 0xe) { // special case, 2 byte writes would be handled differently\r |
| 616 | Pico_mcd->s68k_regs[0xe] = d >> 8;\r |
| 617 | #ifdef USE_POLL_DETECT\r |
| 618 | if ((s68k_poll_adclk&0xfe) == 0xe && s68k_poll_cnt > POLL_LIMIT) {\r |
| 619 | SekSetStopS68k(0); s68k_poll_adclk = 0;\r |
| 620 | elprintf(EL_CDPOLL, "s68k poll release, a=%02x", a);\r |
| 621 | }\r |
| 622 | #endif\r |
| 623 | return;\r |
| 624 | }\r |
| 625 | */\r |
| 626 | m68k_reg_write8(a, d >> 8);\r |
| 627 | m68k_reg_write8(a + 1, d & 0xff);\r |
| 628 | return;\r |
| 629 | }\r |
| 630 | \r |
| 631 | PicoWrite16_io(a, d);\r |
| 632 | }\r |
| 633 | #endif\r |
| 634 | \r |
| 635 | // -----------------------------------------------------------------\r |
| 636 | // Sub 68k\r |
| 637 | // -----------------------------------------------------------------\r |
| 638 | \r |
| 639 | static u32 s68k_unmapped_read8(u32 a)\r |
| 640 | {\r |
| 641 | elprintf(EL_UIO, "s68k unmapped r8 [%06x] @%06x", a, SekPc);\r |
| 642 | return 0;\r |
| 643 | }\r |
| 644 | \r |
| 645 | static u32 s68k_unmapped_read16(u32 a)\r |
| 646 | {\r |
| 647 | elprintf(EL_UIO, "s68k unmapped r16 [%06x] @%06x", a, SekPc);\r |
| 648 | return 0;\r |
| 649 | }\r |
| 650 | \r |
| 651 | static void s68k_unmapped_write8(u32 a, u32 d)\r |
| 652 | {\r |
| 653 | elprintf(EL_UIO, "s68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);\r |
| 654 | }\r |
| 655 | \r |
| 656 | static void s68k_unmapped_write16(u32 a, u32 d)\r |
| 657 | {\r |
| 658 | elprintf(EL_UIO, "s68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);\r |
| 659 | }\r |
| 660 | \r |
| 661 | // PRG RAM protected range (000000 - 00ff00)?\r |
| 662 | // XXX verify: ff00 or 1fe00 max?\r |
| 663 | static void PicoWriteS68k8_prgwp(u32 a, u32 d)\r |
| 664 | {\r |
| 665 | if (a >= (Pico_mcd->s68k_regs[2] << 8))\r |
| 666 | Pico_mcd->prg_ram[a ^ 1] = d;\r |
| 667 | }\r |
| 668 | \r |
| 669 | static void PicoWriteS68k16_prgwp(u32 a, u32 d)\r |
| 670 | {\r |
| 671 | if (a >= (Pico_mcd->s68k_regs[2] << 8))\r |
| 672 | *(u16 *)(Pico_mcd->prg_ram + a) = d;\r |
| 673 | }\r |
| 674 | \r |
| 675 | #ifndef _ASM_CD_MEMORY_C\r |
| 676 | \r |
| 677 | // decode (080000 - 0bffff, in 1M mode)\r |
| 678 | static u32 PicoReadS68k8_dec0(u32 a)\r |
| 679 | {\r |
| 680 | u32 d = Pico_mcd->word_ram1M[0][((a >> 1) ^ 1) & 0x1ffff];\r |
| 681 | if (a & 1)\r |
| 682 | d &= 0x0f;\r |
| 683 | else\r |
| 684 | d >>= 4;\r |
| 685 | return d;\r |
| 686 | }\r |
| 687 | \r |
| 688 | static u32 PicoReadS68k8_dec1(u32 a)\r |
| 689 | {\r |
| 690 | u32 d = Pico_mcd->word_ram1M[1][((a >> 1) ^ 1) & 0x1ffff];\r |
| 691 | if (a & 1)\r |
| 692 | d &= 0x0f;\r |
| 693 | else\r |
| 694 | d >>= 4;\r |
| 695 | return d;\r |
| 696 | }\r |
| 697 | \r |
| 698 | static u32 PicoReadS68k16_dec0(u32 a)\r |
| 699 | {\r |
| 700 | u32 d = Pico_mcd->word_ram1M[0][((a >> 1) ^ 1) & 0x1ffff];\r |
| 701 | d |= d << 4;\r |
| 702 | d &= ~0xf0;\r |
| 703 | return d;\r |
| 704 | }\r |
| 705 | \r |
| 706 | static u32 PicoReadS68k16_dec1(u32 a)\r |
| 707 | {\r |
| 708 | u32 d = Pico_mcd->word_ram1M[1][((a >> 1) ^ 1) & 0x1ffff];\r |
| 709 | d |= d << 4;\r |
| 710 | d &= ~0xf0;\r |
| 711 | return d;\r |
| 712 | }\r |
| 713 | \r |
| 714 | /* check: jaguar xj 220 (draws entire world using decode) */\r |
| 715 | #define mk_decode_w8(bank) \\r |
| 716 | static void PicoWriteS68k8_dec_m0b##bank(u32 a, u32 d) \\r |
| 717 | { \\r |
| 718 | u8 *pd = &Pico_mcd->word_ram1M[bank][((a >> 1) ^ 1) & 0x1ffff]; \\r |
| 719 | \\r |
| 720 | if (!(a & 1)) \\r |
| 721 | *pd = (*pd & 0x0f) | (d << 4); \\r |
| 722 | else \\r |
| 723 | *pd = (*pd & 0xf0) | (d & 0x0f); \\r |
| 724 | } \\r |
| 725 | \\r |
| 726 | static void PicoWriteS68k8_dec_m1b##bank(u32 a, u32 d) \\r |
| 727 | { \\r |
| 728 | u8 *pd = &Pico_mcd->word_ram1M[bank][((a >> 1) ^ 1) & 0x1ffff]; \\r |
| 729 | u8 mask = (a & 1) ? 0x0f : 0xf0; \\r |
| 730 | \\r |
| 731 | if (!(*pd & mask) && (d & 0x0f)) /* underwrite */ \\r |
| 732 | PicoWriteS68k8_dec_m0b##bank(a, d); \\r |
| 733 | } \\r |
| 734 | \\r |
| 735 | static void PicoWriteS68k8_dec_m2b##bank(u32 a, u32 d) /* ...and m3? */ \\r |
| 736 | { \\r |
| 737 | if (d & 0x0f) /* overwrite */ \\r |
| 738 | PicoWriteS68k8_dec_m0b##bank(a, d); \\r |
| 739 | }\r |
| 740 | \r |
| 741 | mk_decode_w8(0)\r |
| 742 | mk_decode_w8(1)\r |
| 743 | \r |
| 744 | #define mk_decode_w16(bank) \\r |
| 745 | static void PicoWriteS68k16_dec_m0b##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; \\r |
| 750 | *pd = d | (d >> 4); \\r |
| 751 | } \\r |
| 752 | \\r |
| 753 | static void PicoWriteS68k16_dec_m1b##bank(u32 a, u32 d) \\r |
| 754 | { \\r |
| 755 | u8 *pd = &Pico_mcd->word_ram1M[bank][((a >> 1) ^ 1) & 0x1ffff]; \\r |
| 756 | \\r |
| 757 | d &= 0x0f0f; /* underwrite */ \\r |
| 758 | if (!(*pd & 0xf0)) *pd |= d >> 4; \\r |
| 759 | if (!(*pd & 0x0f)) *pd |= d; \\r |
| 760 | } \\r |
| 761 | \\r |
| 762 | static void PicoWriteS68k16_dec_m2b##bank(u32 a, u32 d) \\r |
| 763 | { \\r |
| 764 | u8 *pd = &Pico_mcd->word_ram1M[bank][((a >> 1) ^ 1) & 0x1ffff]; \\r |
| 765 | \\r |
| 766 | d &= 0x0f0f; /* overwrite */ \\r |
| 767 | d |= d >> 4; \\r |
| 768 | \\r |
| 769 | if (!(d & 0xf0)) d |= *pd & 0xf0; \\r |
| 770 | if (!(d & 0x0f)) d |= *pd & 0x0f; \\r |
| 771 | *pd = d; \\r |
| 772 | }\r |
| 773 | \r |
| 774 | mk_decode_w16(0)\r |
| 775 | mk_decode_w16(1)\r |
| 776 | \r |
| 777 | #endif\r |
| 778 | \r |
| 779 | // backup RAM (fe0000 - feffff)\r |
| 780 | static u32 PicoReadS68k8_bram(u32 a)\r |
| 781 | {\r |
| 782 | return Pico_mcd->bram[(a>>1)&0x1fff];\r |
| 783 | }\r |
| 784 | \r |
| 785 | static u32 PicoReadS68k16_bram(u32 a)\r |
| 786 | {\r |
| 787 | u32 d;\r |
| 788 | elprintf(EL_ANOMALY, "FIXME: s68k_bram r16: [%06x] @%06x", a, SekPcS68k);\r |
| 789 | a = (a >> 1) & 0x1fff;\r |
| 790 | d = Pico_mcd->bram[a++];\r |
| 791 | d|= Pico_mcd->bram[a++] << 8; // probably wrong, TODO: verify\r |
| 792 | return d;\r |
| 793 | }\r |
| 794 | \r |
| 795 | static void PicoWriteS68k8_bram(u32 a, u32 d)\r |
| 796 | {\r |
| 797 | Pico_mcd->bram[(a >> 1) & 0x1fff] = d;\r |
| 798 | SRam.changed = 1;\r |
| 799 | }\r |
| 800 | \r |
| 801 | static void PicoWriteS68k16_bram(u32 a, u32 d)\r |
| 802 | {\r |
| 803 | elprintf(EL_ANOMALY, "s68k_bram w16: [%06x] %04x @%06x", a, d, SekPcS68k);\r |
| 804 | a = (a >> 1) & 0x1fff;\r |
| 805 | Pico_mcd->bram[a++] = d;\r |
| 806 | Pico_mcd->bram[a++] = d >> 8; // TODO: verify..\r |
| 807 | SRam.changed = 1;\r |
| 808 | }\r |
| 809 | \r |
| 810 | #ifndef _ASM_CD_MEMORY_C\r |
| 811 | \r |
| 812 | // PCM and registers (ff0000 - ffffff)\r |
| 813 | static u32 PicoReadS68k8_pr(u32 a)\r |
| 814 | {\r |
| 815 | u32 d = 0;\r |
| 816 | \r |
| 817 | // regs\r |
| 818 | if ((a & 0xfe00) == 0x8000) {\r |
| 819 | a &= 0x1ff;\r |
| 820 | elprintf(EL_CDREGS, "s68k_regs r8: [%02x] @ %06x", a, SekPcS68k);\r |
| 821 | if (a >= 0x0e && a < 0x30) {\r |
| 822 | d = Pico_mcd->s68k_regs[a];\r |
| 823 | s68k_poll_detect(a, d);\r |
| 824 | elprintf(EL_CDREGS, "ret = %02x", (u8)d);\r |
| 825 | return d;\r |
| 826 | }\r |
| 827 | else if (a >= 0x58 && a < 0x68)\r |
| 828 | d = gfx_cd_read(a & ~1);\r |
| 829 | else d = s68k_reg_read16(a & ~1);\r |
| 830 | if (!(a & 1))\r |
| 831 | d >>= 8;\r |
| 832 | elprintf(EL_CDREGS, "ret = %02x", (u8)d);\r |
| 833 | return d & 0xff;\r |
| 834 | }\r |
| 835 | \r |
| 836 | // PCM\r |
| 837 | // XXX: verify: probably odd addrs only?\r |
| 838 | if ((a & 0x8000) == 0x0000) {\r |
| 839 | a &= 0x7fff;\r |
| 840 | if (a >= 0x2000)\r |
| 841 | d = Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a >> 1) & 0xfff];\r |
| 842 | else if (a >= 0x20) {\r |
| 843 | a &= 0x1e;\r |
| 844 | d = Pico_mcd->pcm.ch[a>>2].addr >> PCM_STEP_SHIFT;\r |
| 845 | if (a & 2)\r |
| 846 | d >>= 8;\r |
| 847 | }\r |
| 848 | return d & 0xff;\r |
| 849 | }\r |
| 850 | \r |
| 851 | return s68k_unmapped_read8(a);\r |
| 852 | }\r |
| 853 | \r |
| 854 | static u32 PicoReadS68k16_pr(u32 a)\r |
| 855 | {\r |
| 856 | u32 d = 0;\r |
| 857 | \r |
| 858 | // regs\r |
| 859 | if ((a & 0xfe00) == 0x8000) {\r |
| 860 | a &= 0x1fe;\r |
| 861 | elprintf(EL_CDREGS, "s68k_regs r16: [%02x] @ %06x", a, SekPcS68k);\r |
| 862 | if (0x58 <= a && a < 0x68)\r |
| 863 | d = gfx_cd_read(a);\r |
| 864 | else d = s68k_reg_read16(a);\r |
| 865 | elprintf(EL_CDREGS, "ret = %04x", d);\r |
| 866 | return d;\r |
| 867 | }\r |
| 868 | \r |
| 869 | // PCM\r |
| 870 | if ((a & 0x8000) == 0x0000) {\r |
| 871 | //elprintf(EL_ANOMALY, "FIXME: s68k_pcm r16: [%06x] @%06x", a, SekPcS68k);\r |
| 872 | a &= 0x7fff;\r |
| 873 | if (a >= 0x2000)\r |
| 874 | d = Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a>>1)&0xfff];\r |
| 875 | else if (a >= 0x20) {\r |
| 876 | a &= 0x1e;\r |
| 877 | d = Pico_mcd->pcm.ch[a>>2].addr >> PCM_STEP_SHIFT;\r |
| 878 | if (a & 2) d >>= 8;\r |
| 879 | }\r |
| 880 | elprintf(EL_CDREGS, "ret = %04x", d);\r |
| 881 | return d;\r |
| 882 | }\r |
| 883 | \r |
| 884 | return s68k_unmapped_read16(a);\r |
| 885 | }\r |
| 886 | \r |
| 887 | static void PicoWriteS68k8_pr(u32 a, u32 d)\r |
| 888 | {\r |
| 889 | // regs\r |
| 890 | if ((a & 0xfe00) == 0x8000) {\r |
| 891 | a &= 0x1ff;\r |
| 892 | elprintf(EL_CDREGS, "s68k_regs w8: [%02x] %02x @ %06x", a, d, SekPcS68k);\r |
| 893 | if (0x58 <= a && a < 0x68)\r |
| 894 | gfx_cd_write16(a&~1, (d<<8)|d);\r |
| 895 | else s68k_reg_write8(a,d);\r |
| 896 | return;\r |
| 897 | }\r |
| 898 | \r |
| 899 | // PCM\r |
| 900 | if ((a & 0x8000) == 0x0000) {\r |
| 901 | a &= 0x7fff;\r |
| 902 | if (a >= 0x2000)\r |
| 903 | Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a>>1)&0xfff] = d;\r |
| 904 | else if (a < 0x12)\r |
| 905 | pcm_write(a>>1, d);\r |
| 906 | return;\r |
| 907 | }\r |
| 908 | \r |
| 909 | s68k_unmapped_write8(a, d);\r |
| 910 | }\r |
| 911 | \r |
| 912 | static void PicoWriteS68k16_pr(u32 a, u32 d)\r |
| 913 | {\r |
| 914 | // regs\r |
| 915 | if ((a & 0xfe00) == 0x8000) {\r |
| 916 | a &= 0x1fe;\r |
| 917 | elprintf(EL_CDREGS, "s68k_regs w16: [%02x] %04x @ %06x", a, d, SekPcS68k);\r |
| 918 | if (a >= 0x58 && a < 0x68)\r |
| 919 | gfx_cd_write16(a, d);\r |
| 920 | else {\r |
| 921 | if (a == 0xe) {\r |
| 922 | // special case, 2 byte writes would be handled differently\r |
| 923 | // TODO: verify\r |
| 924 | Pico_mcd->s68k_regs[0xf] = d;\r |
| 925 | return;\r |
| 926 | }\r |
| 927 | s68k_reg_write8(a, d >> 8);\r |
| 928 | s68k_reg_write8(a + 1, d & 0xff);\r |
| 929 | }\r |
| 930 | return;\r |
| 931 | }\r |
| 932 | \r |
| 933 | // PCM\r |
| 934 | if ((a & 0x8000) == 0x0000) {\r |
| 935 | a &= 0x7fff;\r |
| 936 | if (a >= 0x2000)\r |
| 937 | Pico_mcd->pcm_ram_b[Pico_mcd->pcm.bank][(a>>1)&0xfff] = d;\r |
| 938 | else if (a < 0x12)\r |
| 939 | pcm_write(a>>1, d & 0xff);\r |
| 940 | return;\r |
| 941 | }\r |
| 942 | \r |
| 943 | s68k_unmapped_write16(a, d);\r |
| 944 | }\r |
| 945 | \r |
| 946 | #endif\r |
| 947 | \r |
| 948 | static const void *m68k_cell_read8[] = { PicoReadM68k8_cell0, PicoReadM68k8_cell1 };\r |
| 949 | static const void *m68k_cell_read16[] = { PicoReadM68k16_cell0, PicoReadM68k16_cell1 };\r |
| 950 | static const void *m68k_cell_write8[] = { PicoWriteM68k8_cell0, PicoWriteM68k8_cell1 };\r |
| 951 | static const void *m68k_cell_write16[] = { PicoWriteM68k16_cell0, PicoWriteM68k16_cell1 };\r |
| 952 | \r |
| 953 | static const void *s68k_dec_read8[] = { PicoReadS68k8_dec0, PicoReadS68k8_dec1 };\r |
| 954 | static const void *s68k_dec_read16[] = { PicoReadS68k16_dec0, PicoReadS68k16_dec1 };\r |
| 955 | \r |
| 956 | static const void *s68k_dec_write8[2][4] = {\r |
| 957 | { PicoWriteS68k8_dec_m0b0, PicoWriteS68k8_dec_m1b0, PicoWriteS68k8_dec_m2b0, PicoWriteS68k8_dec_m2b0 },\r |
| 958 | { PicoWriteS68k8_dec_m0b1, PicoWriteS68k8_dec_m1b1, PicoWriteS68k8_dec_m2b1, PicoWriteS68k8_dec_m2b1 },\r |
| 959 | };\r |
| 960 | \r |
| 961 | static const void *s68k_dec_write16[2][4] = {\r |
| 962 | { PicoWriteS68k16_dec_m0b0, PicoWriteS68k16_dec_m1b0, PicoWriteS68k16_dec_m2b0, PicoWriteS68k16_dec_m2b0 },\r |
| 963 | { PicoWriteS68k16_dec_m0b1, PicoWriteS68k16_dec_m1b1, PicoWriteS68k16_dec_m2b1, PicoWriteS68k16_dec_m2b1 },\r |
| 964 | };\r |
| 965 | \r |
| 966 | // -----------------------------------------------------------------\r |
| 967 | \r |
| 968 | static void remap_prg_window(void)\r |
| 969 | {\r |
| 970 | // PRG RAM\r |
| 971 | if (Pico_mcd->m.busreq & 2) {\r |
| 972 | void *bank = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3] >> 6];\r |
| 973 | cpu68k_map_all_ram(0x020000, 0x03ffff, bank, 0);\r |
| 974 | }\r |
| 975 | else {\r |
| 976 | m68k_map_unmap(0x020000, 0x03ffff);\r |
| 977 | }\r |
| 978 | }\r |
| 979 | \r |
| 980 | static void remap_word_ram(int r3)\r |
| 981 | {\r |
| 982 | void *bank;\r |
| 983 | \r |
| 984 | // WORD RAM\r |
| 985 | if (!(r3 & 4)) {\r |
| 986 | // 2M mode. XXX: allowing access in all cases for simplicity\r |
| 987 | bank = Pico_mcd->word_ram2M;\r |
| 988 | cpu68k_map_all_ram(0x200000, 0x23ffff, bank, 0);\r |
| 989 | cpu68k_map_all_ram(0x080000, 0x0bffff, bank, 1);\r |
| 990 | // TODO: handle 0x0c0000\r |
| 991 | }\r |
| 992 | else {\r |
| 993 | int b0 = r3 & 1;\r |
| 994 | int m = (r3 & 0x18) >> 3;\r |
| 995 | bank = Pico_mcd->word_ram1M[b0];\r |
| 996 | cpu68k_map_all_ram(0x200000, 0x21ffff, bank, 0);\r |
| 997 | bank = Pico_mcd->word_ram1M[b0 ^ 1];\r |
| 998 | cpu68k_map_all_ram(0x0c0000, 0x0effff, bank, 1);\r |
| 999 | // "cell arrange" on m68k\r |
| 1000 | cpu68k_map_set(m68k_read8_map, 0x220000, 0x23ffff, m68k_cell_read8[b0], 1);\r |
| 1001 | cpu68k_map_set(m68k_read16_map, 0x220000, 0x23ffff, m68k_cell_read16[b0], 1);\r |
| 1002 | cpu68k_map_set(m68k_write8_map, 0x220000, 0x23ffff, m68k_cell_write8[b0], 1);\r |
| 1003 | cpu68k_map_set(m68k_write16_map, 0x220000, 0x23ffff, m68k_cell_write16[b0], 1);\r |
| 1004 | // "decode format" on s68k\r |
| 1005 | cpu68k_map_set(s68k_read8_map, 0x080000, 0x0bffff, s68k_dec_read8[b0 ^ 1], 1);\r |
| 1006 | cpu68k_map_set(s68k_read16_map, 0x080000, 0x0bffff, s68k_dec_read16[b0 ^ 1], 1);\r |
| 1007 | cpu68k_map_set(s68k_write8_map, 0x080000, 0x0bffff, s68k_dec_write8[b0 ^ 1][m], 1);\r |
| 1008 | cpu68k_map_set(s68k_write16_map, 0x080000, 0x0bffff, s68k_dec_write16[b0 ^ 1][m], 1);\r |
| 1009 | }\r |
| 1010 | \r |
| 1011 | #ifdef EMU_F68K\r |
| 1012 | // update fetchmap..\r |
| 1013 | int i;\r |
| 1014 | if (!(r3 & 4))\r |
| 1015 | {\r |
| 1016 | for (i = M68K_FETCHBANK1*2/16; (i<<(24-FAMEC_FETCHBITS)) < 0x240000; i++)\r |
| 1017 | PicoCpuFM68k.Fetch[i] = (unsigned long)Pico_mcd->word_ram2M - 0x200000;\r |
| 1018 | }\r |
| 1019 | else\r |
| 1020 | {\r |
| 1021 | for (i = M68K_FETCHBANK1*2/16; (i<<(24-FAMEC_FETCHBITS)) < 0x220000; i++)\r |
| 1022 | PicoCpuFM68k.Fetch[i] = (unsigned long)Pico_mcd->word_ram1M[r3 & 1] - 0x200000;\r |
| 1023 | for (i = M68K_FETCHBANK1*0x0c/0x100; (i<<(24-FAMEC_FETCHBITS)) < 0x0e0000; i++)\r |
| 1024 | PicoCpuFS68k.Fetch[i] = (unsigned long)Pico_mcd->word_ram1M[(r3&1)^1] - 0x0c0000;\r |
| 1025 | }\r |
| 1026 | #endif\r |
| 1027 | }\r |
| 1028 | \r |
| 1029 | void pcd_state_loaded_mem(void)\r |
| 1030 | {\r |
| 1031 | int r3 = Pico_mcd->s68k_regs[3];\r |
| 1032 | \r |
| 1033 | /* after load events */\r |
| 1034 | if (r3 & 4) // 1M mode?\r |
| 1035 | wram_2M_to_1M(Pico_mcd->word_ram2M);\r |
| 1036 | remap_word_ram(r3);\r |
| 1037 | remap_prg_window();\r |
| 1038 | \r |
| 1039 | // restore hint vector\r |
| 1040 | *(unsigned short *)(Pico_mcd->bios + 0x72) = Pico_mcd->m.hint_vector;\r |
| 1041 | }\r |
| 1042 | \r |
| 1043 | #ifdef EMU_M68K\r |
| 1044 | static void m68k_mem_setup_cd(void);\r |
| 1045 | #endif\r |
| 1046 | \r |
| 1047 | PICO_INTERNAL void PicoMemSetupCD(void)\r |
| 1048 | {\r |
| 1049 | // setup default main68k map\r |
| 1050 | PicoMemSetup();\r |
| 1051 | \r |
| 1052 | // main68k map (BIOS mapped by PicoMemSetup()):\r |
| 1053 | // RAM cart\r |
| 1054 | if (PicoOpt & POPT_EN_MCD_RAMCART) {\r |
| 1055 | cpu68k_map_set(m68k_read8_map, 0x400000, 0x7fffff, PicoReadM68k8_ramc, 1);\r |
| 1056 | cpu68k_map_set(m68k_read16_map, 0x400000, 0x7fffff, PicoReadM68k16_ramc, 1);\r |
| 1057 | cpu68k_map_set(m68k_write8_map, 0x400000, 0x7fffff, PicoWriteM68k8_ramc, 1);\r |
| 1058 | cpu68k_map_set(m68k_write16_map, 0x400000, 0x7fffff, PicoWriteM68k16_ramc, 1);\r |
| 1059 | }\r |
| 1060 | \r |
| 1061 | // registers/IO:\r |
| 1062 | cpu68k_map_set(m68k_read8_map, 0xa10000, 0xa1ffff, PicoReadM68k8_io, 1);\r |
| 1063 | cpu68k_map_set(m68k_read16_map, 0xa10000, 0xa1ffff, PicoReadM68k16_io, 1);\r |
| 1064 | cpu68k_map_set(m68k_write8_map, 0xa10000, 0xa1ffff, PicoWriteM68k8_io, 1);\r |
| 1065 | cpu68k_map_set(m68k_write16_map, 0xa10000, 0xa1ffff, PicoWriteM68k16_io, 1);\r |
| 1066 | \r |
| 1067 | // sub68k map\r |
| 1068 | cpu68k_map_set(s68k_read8_map, 0x000000, 0xffffff, s68k_unmapped_read8, 1);\r |
| 1069 | cpu68k_map_set(s68k_read16_map, 0x000000, 0xffffff, s68k_unmapped_read16, 1);\r |
| 1070 | cpu68k_map_set(s68k_write8_map, 0x000000, 0xffffff, s68k_unmapped_write8, 1);\r |
| 1071 | cpu68k_map_set(s68k_write16_map, 0x000000, 0xffffff, s68k_unmapped_write16, 1);\r |
| 1072 | \r |
| 1073 | // PRG RAM\r |
| 1074 | cpu68k_map_set(s68k_read8_map, 0x000000, 0x07ffff, Pico_mcd->prg_ram, 0);\r |
| 1075 | cpu68k_map_set(s68k_read16_map, 0x000000, 0x07ffff, Pico_mcd->prg_ram, 0);\r |
| 1076 | cpu68k_map_set(s68k_write8_map, 0x000000, 0x07ffff, Pico_mcd->prg_ram, 0);\r |
| 1077 | cpu68k_map_set(s68k_write16_map, 0x000000, 0x07ffff, Pico_mcd->prg_ram, 0);\r |
| 1078 | cpu68k_map_set(s68k_write8_map, 0x000000, 0x00ffff, PicoWriteS68k8_prgwp, 1);\r |
| 1079 | cpu68k_map_set(s68k_write16_map, 0x000000, 0x00ffff, PicoWriteS68k16_prgwp, 1);\r |
| 1080 | \r |
| 1081 | // BRAM\r |
| 1082 | cpu68k_map_set(s68k_read8_map, 0xfe0000, 0xfeffff, PicoReadS68k8_bram, 1);\r |
| 1083 | cpu68k_map_set(s68k_read16_map, 0xfe0000, 0xfeffff, PicoReadS68k16_bram, 1);\r |
| 1084 | cpu68k_map_set(s68k_write8_map, 0xfe0000, 0xfeffff, PicoWriteS68k8_bram, 1);\r |
| 1085 | cpu68k_map_set(s68k_write16_map, 0xfe0000, 0xfeffff, PicoWriteS68k16_bram, 1);\r |
| 1086 | \r |
| 1087 | // PCM, regs\r |
| 1088 | cpu68k_map_set(s68k_read8_map, 0xff0000, 0xffffff, PicoReadS68k8_pr, 1);\r |
| 1089 | cpu68k_map_set(s68k_read16_map, 0xff0000, 0xffffff, PicoReadS68k16_pr, 1);\r |
| 1090 | cpu68k_map_set(s68k_write8_map, 0xff0000, 0xffffff, PicoWriteS68k8_pr, 1);\r |
| 1091 | cpu68k_map_set(s68k_write16_map, 0xff0000, 0xffffff, PicoWriteS68k16_pr, 1);\r |
| 1092 | \r |
| 1093 | // RAMs\r |
| 1094 | remap_word_ram(1);\r |
| 1095 | \r |
| 1096 | #ifdef EMU_C68K\r |
| 1097 | // s68k\r |
| 1098 | PicoCpuCS68k.read8 = (void *)s68k_read8_map;\r |
| 1099 | PicoCpuCS68k.read16 = (void *)s68k_read16_map;\r |
| 1100 | PicoCpuCS68k.read32 = (void *)s68k_read16_map;\r |
| 1101 | PicoCpuCS68k.write8 = (void *)s68k_write8_map;\r |
| 1102 | PicoCpuCS68k.write16 = (void *)s68k_write16_map;\r |
| 1103 | PicoCpuCS68k.write32 = (void *)s68k_write16_map;\r |
| 1104 | PicoCpuCS68k.checkpc = NULL; /* unused */\r |
| 1105 | PicoCpuCS68k.fetch8 = NULL;\r |
| 1106 | PicoCpuCS68k.fetch16 = NULL;\r |
| 1107 | PicoCpuCS68k.fetch32 = NULL;\r |
| 1108 | #endif\r |
| 1109 | #ifdef EMU_F68K\r |
| 1110 | // s68k\r |
| 1111 | PicoCpuFS68k.read_byte = s68k_read8;\r |
| 1112 | PicoCpuFS68k.read_word = s68k_read16;\r |
| 1113 | PicoCpuFS68k.read_long = s68k_read32;\r |
| 1114 | PicoCpuFS68k.write_byte = s68k_write8;\r |
| 1115 | PicoCpuFS68k.write_word = s68k_write16;\r |
| 1116 | PicoCpuFS68k.write_long = s68k_write32;\r |
| 1117 | \r |
| 1118 | // setup FAME fetchmap\r |
| 1119 | {\r |
| 1120 | int i;\r |
| 1121 | // M68k\r |
| 1122 | // by default, point everything to fitst 64k of ROM (BIOS)\r |
| 1123 | for (i = 0; i < M68K_FETCHBANK1; i++)\r |
| 1124 | PicoCpuFM68k.Fetch[i] = (unsigned long)Pico.rom - (i<<(24-FAMEC_FETCHBITS));\r |
| 1125 | // now real ROM (BIOS)\r |
| 1126 | for (i = 0; i < M68K_FETCHBANK1 && (i<<(24-FAMEC_FETCHBITS)) < Pico.romsize; i++)\r |
| 1127 | PicoCpuFM68k.Fetch[i] = (unsigned long)Pico.rom;\r |
| 1128 | // .. and RAM\r |
| 1129 | for (i = M68K_FETCHBANK1*14/16; i < M68K_FETCHBANK1; i++)\r |
| 1130 | PicoCpuFM68k.Fetch[i] = (unsigned long)Pico.ram - (i<<(24-FAMEC_FETCHBITS));\r |
| 1131 | // S68k\r |
| 1132 | // PRG RAM is default\r |
| 1133 | for (i = 0; i < M68K_FETCHBANK1; i++)\r |
| 1134 | PicoCpuFS68k.Fetch[i] = (unsigned long)Pico_mcd->prg_ram - (i<<(24-FAMEC_FETCHBITS));\r |
| 1135 | // real PRG RAM\r |
| 1136 | for (i = 0; i < M68K_FETCHBANK1 && (i<<(24-FAMEC_FETCHBITS)) < 0x80000; i++)\r |
| 1137 | PicoCpuFS68k.Fetch[i] = (unsigned long)Pico_mcd->prg_ram;\r |
| 1138 | // WORD RAM 2M area\r |
| 1139 | for (i = M68K_FETCHBANK1*0x08/0x100; i < M68K_FETCHBANK1 && (i<<(24-FAMEC_FETCHBITS)) < 0xc0000; i++)\r |
| 1140 | PicoCpuFS68k.Fetch[i] = (unsigned long)Pico_mcd->word_ram2M - 0x80000;\r |
| 1141 | // remap_word_ram() will setup word ram for both\r |
| 1142 | }\r |
| 1143 | #endif\r |
| 1144 | #ifdef EMU_M68K\r |
| 1145 | m68k_mem_setup_cd();\r |
| 1146 | #endif\r |
| 1147 | \r |
| 1148 | // m68k_poll_addr = m68k_poll_cnt = 0;\r |
| 1149 | s68k_poll_adclk = s68k_poll_cnt = 0;\r |
| 1150 | }\r |
| 1151 | \r |
| 1152 | \r |
| 1153 | #ifdef EMU_M68K\r |
| 1154 | u32 m68k_read8(u32 a);\r |
| 1155 | u32 m68k_read16(u32 a);\r |
| 1156 | u32 m68k_read32(u32 a);\r |
| 1157 | void m68k_write8(u32 a, u8 d);\r |
| 1158 | void m68k_write16(u32 a, u16 d);\r |
| 1159 | void m68k_write32(u32 a, u32 d);\r |
| 1160 | \r |
| 1161 | static unsigned int PicoReadCD8w (unsigned int a) {\r |
| 1162 | return m68ki_cpu_p == &PicoCpuMS68k ? s68k_read8(a) : m68k_read8(a);\r |
| 1163 | }\r |
| 1164 | static unsigned int PicoReadCD16w(unsigned int a) {\r |
| 1165 | return m68ki_cpu_p == &PicoCpuMS68k ? s68k_read16(a) : m68k_read16(a);\r |
| 1166 | }\r |
| 1167 | static unsigned int PicoReadCD32w(unsigned int a) {\r |
| 1168 | return m68ki_cpu_p == &PicoCpuMS68k ? s68k_read32(a) : m68k_read32(a);\r |
| 1169 | }\r |
| 1170 | static void PicoWriteCD8w (unsigned int a, unsigned char d) {\r |
| 1171 | if (m68ki_cpu_p == &PicoCpuMS68k) s68k_write8(a, d); else m68k_write8(a, d);\r |
| 1172 | }\r |
| 1173 | static void PicoWriteCD16w(unsigned int a, unsigned short d) {\r |
| 1174 | if (m68ki_cpu_p == &PicoCpuMS68k) s68k_write16(a, d); else m68k_write16(a, d);\r |
| 1175 | }\r |
| 1176 | static void PicoWriteCD32w(unsigned int a, unsigned int d) {\r |
| 1177 | if (m68ki_cpu_p == &PicoCpuMS68k) s68k_write32(a, d); else m68k_write32(a, d);\r |
| 1178 | }\r |
| 1179 | \r |
| 1180 | extern unsigned int (*pm68k_read_memory_8) (unsigned int address);\r |
| 1181 | extern unsigned int (*pm68k_read_memory_16)(unsigned int address);\r |
| 1182 | extern unsigned int (*pm68k_read_memory_32)(unsigned int address);\r |
| 1183 | extern void (*pm68k_write_memory_8) (unsigned int address, unsigned char value);\r |
| 1184 | extern void (*pm68k_write_memory_16)(unsigned int address, unsigned short value);\r |
| 1185 | extern void (*pm68k_write_memory_32)(unsigned int address, unsigned int value);\r |
| 1186 | \r |
| 1187 | static void m68k_mem_setup_cd(void)\r |
| 1188 | {\r |
| 1189 | pm68k_read_memory_8 = PicoReadCD8w;\r |
| 1190 | pm68k_read_memory_16 = PicoReadCD16w;\r |
| 1191 | pm68k_read_memory_32 = PicoReadCD32w;\r |
| 1192 | pm68k_write_memory_8 = PicoWriteCD8w;\r |
| 1193 | pm68k_write_memory_16 = PicoWriteCD16w;\r |
| 1194 | pm68k_write_memory_32 = PicoWriteCD32w;\r |
| 1195 | }\r |
| 1196 | #endif // EMU_M68K\r |
| 1197 | \r |
| 1198 | // vim:shiftwidth=2:ts=2:expandtab\r |