| | 1 | /* |
| | 2 | * PicoDrive |
| | 3 | * (C) notaz, 2009,2010,2013 |
| | 4 | * |
| | 5 | * This work is licensed under the terms of MAME license. |
| | 6 | * See COPYING file in the top-level directory. |
| | 7 | * |
| | 8 | * Register map: |
| | 9 | * a15100 F....... R.....EA F.....AC N...VHMP 4000 // Fm Ren nrEs Aden Cart heN V H cMd Pwm |
| | 10 | * a15102 ........ ......SM ? 4002 // intS intM |
| | 11 | * a15104 ........ ......10 ........ hhhhhhhh 4004 // bk1 bk0 Hint |
| | 12 | * a15106 ........ F....SDR UE...... .....SDR 4006 // Full 68S Dma Rv fUll[fb] Empt[fb] |
| | 13 | * a15108 (32bit DREQ src) 4008 |
| | 14 | * a1510c (32bit DREQ dst) 400c |
| | 15 | * a15110 llllllll llllll00 4010 // DREQ Len |
| | 16 | * a15112 (16bit FIFO reg) 4012 |
| | 17 | * a15114 0 (16bit VRES clr) 4014 |
| | 18 | * a15116 0 (16bit Vint clr) 4016 |
| | 19 | * a15118 0 (16bit Hint clr) 4018 |
| | 20 | * a1511a .......? .......C (16bit CMD clr) 401a // TV Cm |
| | 21 | * a1511c 0 (16bit PWM clr) 401c |
| | 22 | * a1511e 0 ? 401e |
| | 23 | * a15120 (16 bytes comm) 2020 |
| | 24 | * a15130 (PWM) 2030 |
| | 25 | * |
| | 26 | * SH2 addr lines: |
| | 27 | * iii. .cc. ..xx * // Internal, Cs, x |
| | 28 | * |
| | 29 | * sh2 map, wait/bus cycles (from docs): |
| | 30 | * r w |
| | 31 | * rom 0000000-0003fff 1 - |
| | 32 | * sys reg 0004000-00040ff 1 1 |
| | 33 | * vdp reg 0004100-00041ff 5 5 |
| | 34 | * vdp pal 0004200-00043ff 5 5 |
| | 35 | * cart 2000000-23fffff 6-15 |
| | 36 | * dram/fb 4000000-401ffff 5-12 1-3 |
| | 37 | * fb ovr 4020000-403ffff |
| | 38 | * sdram 6000000-603ffff 12 2 (cycles) |
| | 39 | * d.a. c0000000-? |
| | 40 | */ |
| | 41 | #include "../pico_int.h" |
| | 42 | #include "../memory.h" |
| | 43 | #include "../../cpu/sh2/compiler.h" |
| | 44 | |
| | 45 | static const char str_mars[] = "MARS"; |
| | 46 | |
| | 47 | void *p32x_bios_g, *p32x_bios_m, *p32x_bios_s; |
| | 48 | struct Pico32xMem *Pico32xMem; |
| | 49 | |
| | 50 | static void bank_switch_rom_68k(int b); |
| | 51 | |
| | 52 | // addressing byte in 16bit reg |
| | 53 | #define REG8IN16(ptr, offs) ((u8 *)ptr)[(offs) ^ 1] |
| | 54 | |
| | 55 | // poll detection |
| | 56 | #define POLL_THRESHOLD 3 |
| | 57 | |
| | 58 | static struct { |
| | 59 | u32 addr, cycles; |
| | 60 | int cnt; |
| | 61 | } m68k_poll; |
| | 62 | |
| | 63 | static int m68k_poll_detect(u32 a, u32 cycles, u32 flags) |
| | 64 | { |
| | 65 | int ret = 0; |
| | 66 | |
| | 67 | if (a - 2 <= m68k_poll.addr && m68k_poll.addr <= a + 2 |
| | 68 | && cycles - m68k_poll.cycles <= 64 && !SekNotPolling) |
| | 69 | { |
| | 70 | if (m68k_poll.cnt++ > POLL_THRESHOLD) { |
| | 71 | if (!(Pico32x.emu_flags & flags)) { |
| | 72 | elprintf(EL_32X, "m68k poll addr %08x, cyc %u", |
| | 73 | a, cycles - m68k_poll.cycles); |
| | 74 | ret = 1; |
| | 75 | } |
| | 76 | Pico32x.emu_flags |= flags; |
| | 77 | } |
| | 78 | } |
| | 79 | else { |
| | 80 | m68k_poll.cnt = 0; |
| | 81 | m68k_poll.addr = a; |
| | 82 | SekNotPolling = 0; |
| | 83 | } |
| | 84 | m68k_poll.cycles = cycles; |
| | 85 | |
| | 86 | return ret; |
| | 87 | } |
| | 88 | |
| | 89 | void p32x_m68k_poll_event(u32 flags) |
| | 90 | { |
| | 91 | if (Pico32x.emu_flags & flags) { |
| | 92 | elprintf(EL_32X, "m68k poll %02x -> %02x", Pico32x.emu_flags, |
| | 93 | Pico32x.emu_flags & ~flags); |
| | 94 | Pico32x.emu_flags &= ~flags; |
| | 95 | SekSetStop(0); |
| | 96 | } |
| | 97 | m68k_poll.addr = m68k_poll.cnt = 0; |
| | 98 | } |
| | 99 | |
| | 100 | static void sh2_poll_detect(SH2 *sh2, u32 a, u32 flags, int maxcnt) |
| | 101 | { |
| | 102 | int cycles_left = sh2_cycles_left(sh2); |
| | 103 | |
| | 104 | if (a == sh2->poll_addr && sh2->poll_cycles - cycles_left <= 10) { |
| | 105 | if (sh2->poll_cnt++ > maxcnt) { |
| | 106 | if (!(sh2->state & flags)) |
| | 107 | elprintf_sh2(sh2, EL_32X, "state: %02x->%02x", |
| | 108 | sh2->state, sh2->state | flags); |
| | 109 | |
| | 110 | sh2->state |= flags; |
| | 111 | sh2_end_run(sh2, 1); |
| | 112 | pevt_log_sh2(sh2, EVT_POLL_START); |
| | 113 | return; |
| | 114 | } |
| | 115 | } |
| | 116 | else |
| | 117 | sh2->poll_cnt = 0; |
| | 118 | sh2->poll_addr = a; |
| | 119 | sh2->poll_cycles = cycles_left; |
| | 120 | } |
| | 121 | |
| | 122 | void p32x_sh2_poll_event(SH2 *sh2, u32 flags, u32 m68k_cycles) |
| | 123 | { |
| | 124 | if (sh2->state & flags) { |
| | 125 | elprintf_sh2(sh2, EL_32X, "state: %02x->%02x", sh2->state, |
| | 126 | sh2->state & ~flags); |
| | 127 | |
| | 128 | if (sh2->m68krcycles_done < m68k_cycles) |
| | 129 | sh2->m68krcycles_done = m68k_cycles; |
| | 130 | |
| | 131 | pevt_log_sh2_o(sh2, EVT_POLL_END); |
| | 132 | } |
| | 133 | |
| | 134 | sh2->state &= ~flags; |
| | 135 | sh2->poll_addr = sh2->poll_cycles = sh2->poll_cnt = 0; |
| | 136 | } |
| | 137 | |
| | 138 | static void sh2s_sync_on_read(SH2 *sh2) |
| | 139 | { |
| | 140 | int cycles; |
| | 141 | if (sh2->poll_cnt != 0) |
| | 142 | return; |
| | 143 | |
| | 144 | cycles = sh2_cycles_done(sh2); |
| | 145 | if (cycles > 600) |
| | 146 | p32x_sync_other_sh2(sh2, sh2->m68krcycles_done + cycles / 3); |
| | 147 | } |
| | 148 | |
| | 149 | // SH2 faking |
| | 150 | //#define FAKE_SH2 |
| | 151 | #ifdef FAKE_SH2 |
| | 152 | static int p32x_csum_faked; |
| | 153 | static const u16 comm_fakevals[] = { |
| | 154 | 0x4d5f, 0x4f4b, // M_OK |
| | 155 | 0x535f, 0x4f4b, // S_OK |
| | 156 | 0x4D41, 0x5346, // MASF - Brutal Unleashed |
| | 157 | 0x5331, 0x4d31, // Darxide |
| | 158 | 0x5332, 0x4d32, |
| | 159 | 0x5333, 0x4d33, |
| | 160 | 0x0000, 0x0000, // eq for doom |
| | 161 | 0x0002, // Mortal Kombat |
| | 162 | // 0, // pad |
| | 163 | }; |
| | 164 | |
| | 165 | static u32 sh2_comm_faker(u32 a) |
| | 166 | { |
| | 167 | static int f = 0; |
| | 168 | if (a == 0x28 && !p32x_csum_faked) { |
| | 169 | p32x_csum_faked = 1; |
| | 170 | return *(unsigned short *)(Pico.rom + 0x18e); |
| | 171 | } |
| | 172 | if (f >= sizeof(comm_fakevals) / sizeof(comm_fakevals[0])) |
| | 173 | f = 0; |
| | 174 | return comm_fakevals[f++]; |
| | 175 | } |
| | 176 | #endif |
| | 177 | |
| | 178 | // ------------------------------------------------------------------ |
| | 179 | // 68k regs |
| | 180 | |
| | 181 | static u32 p32x_reg_read16(u32 a) |
| | 182 | { |
| | 183 | a &= 0x3e; |
| | 184 | |
| | 185 | #if 0 |
| | 186 | if ((a & 0x30) == 0x20) |
| | 187 | return sh2_comm_faker(a); |
| | 188 | #else |
| | 189 | if ((a & 0x30) == 0x20) { |
| | 190 | unsigned int cycles = SekCyclesDone(); |
| | 191 | int comreg = 1 << (a & 0x0f) / 2; |
| | 192 | |
| | 193 | if (cycles - msh2.m68krcycles_done > 244 |
| | 194 | || (Pico32x.comm_dirty & comreg)) |
| | 195 | p32x_sync_sh2s(cycles); |
| | 196 | |
| | 197 | if (m68k_poll_detect(a, cycles, P32XF_68KCPOLL)) { |
| | 198 | SekSetStop(1); |
| | 199 | SekEndRun(16); |
| | 200 | } |
| | 201 | goto out; |
| | 202 | } |
| | 203 | #endif |
| | 204 | |
| | 205 | if (a == 2) { // INTM, INTS |
| | 206 | unsigned int cycles = SekCyclesDone(); |
| | 207 | if (cycles - msh2.m68krcycles_done > 64) |
| | 208 | p32x_sync_sh2s(cycles); |
| | 209 | goto out; |
| | 210 | } |
| | 211 | |
| | 212 | if ((a & 0x30) == 0x30) |
| | 213 | return p32x_pwm_read16(a, NULL, SekCyclesDone()); |
| | 214 | |
| | 215 | out: |
| | 216 | return Pico32x.regs[a / 2]; |
| | 217 | } |
| | 218 | |
| | 219 | static void dreq0_write(u16 *r, u32 d) |
| | 220 | { |
| | 221 | if (!(r[6 / 2] & P32XS_68S)) { |
| | 222 | elprintf(EL_32X|EL_ANOMALY, "DREQ FIFO w16 without 68S?"); |
| | 223 | return; // ignored - tested |
| | 224 | } |
| | 225 | if (Pico32x.dmac0_fifo_ptr < DMAC_FIFO_LEN) { |
| | 226 | Pico32x.dmac_fifo[Pico32x.dmac0_fifo_ptr++] = d; |
| | 227 | if (Pico32x.dmac0_fifo_ptr == DMAC_FIFO_LEN) |
| | 228 | r[6 / 2] |= P32XS_FULL; |
| | 229 | // tested: len register decrements and 68S clears |
| | 230 | // even if SH2s/DMAC aren't active.. |
| | 231 | r[0x10 / 2]--; |
| | 232 | if (r[0x10 / 2] == 0) |
| | 233 | r[6 / 2] &= ~P32XS_68S; |
| | 234 | |
| | 235 | if ((Pico32x.dmac0_fifo_ptr & 3) == 0) { |
| | 236 | p32x_sync_sh2s(SekCyclesDone()); |
| | 237 | p32x_dreq0_trigger(); |
| | 238 | } |
| | 239 | } |
| | 240 | else |
| | 241 | elprintf(EL_32X|EL_ANOMALY, "DREQ FIFO overflow!"); |
| | 242 | } |
| | 243 | |
| | 244 | // writable bits tested |
| | 245 | static void p32x_reg_write8(u32 a, u32 d) |
| | 246 | { |
| | 247 | u16 *r = Pico32x.regs; |
| | 248 | a &= 0x3f; |
| | 249 | |
| | 250 | // for things like bset on comm port |
| | 251 | m68k_poll.cnt = 0; |
| | 252 | |
| | 253 | switch (a) { |
| | 254 | case 0x00: // adapter ctl: FM writable |
| | 255 | REG8IN16(r, 0x00) = d & 0x80; |
| | 256 | return; |
| | 257 | case 0x01: // adapter ctl: RES and ADEN writable |
| | 258 | if ((d ^ r[0]) & d & P32XS_nRES) |
| | 259 | p32x_reset_sh2s(); |
| | 260 | REG8IN16(r, 0x01) &= ~(P32XS_nRES|P32XS_ADEN); |
| | 261 | REG8IN16(r, 0x01) |= d & (P32XS_nRES|P32XS_ADEN); |
| | 262 | return; |
| | 263 | case 0x02: // ignored, always 0 |
| | 264 | return; |
| | 265 | case 0x03: // irq ctl |
| | 266 | if ((d ^ r[0x02 / 2]) & 3) { |
| | 267 | int cycles = SekCyclesDone(); |
| | 268 | p32x_sync_sh2s(cycles); |
| | 269 | r[0x02 / 2] = d & 3; |
| | 270 | p32x_update_cmd_irq(NULL, cycles); |
| | 271 | } |
| | 272 | return; |
| | 273 | case 0x04: // ignored, always 0 |
| | 274 | return; |
| | 275 | case 0x05: // bank |
| | 276 | d &= 3; |
| | 277 | if (r[0x04 / 2] != d) { |
| | 278 | r[0x04 / 2] = d; |
| | 279 | bank_switch_rom_68k(d); |
| | 280 | } |
| | 281 | return; |
| | 282 | case 0x06: // ignored, always 0 |
| | 283 | return; |
| | 284 | case 0x07: // DREQ ctl |
| | 285 | REG8IN16(r, 0x07) &= ~(P32XS_68S|P32XS_DMA|P32XS_RV); |
| | 286 | if (!(d & P32XS_68S)) { |
| | 287 | Pico32x.dmac0_fifo_ptr = 0; |
| | 288 | REG8IN16(r, 0x07) &= ~P32XS_FULL; |
| | 289 | } |
| | 290 | REG8IN16(r, 0x07) |= d & (P32XS_68S|P32XS_DMA|P32XS_RV); |
| | 291 | return; |
| | 292 | case 0x08: // ignored, always 0 |
| | 293 | return; |
| | 294 | case 0x09: // DREQ src |
| | 295 | REG8IN16(r, 0x09) = d; |
| | 296 | return; |
| | 297 | case 0x0a: |
| | 298 | REG8IN16(r, 0x0a) = d; |
| | 299 | return; |
| | 300 | case 0x0b: |
| | 301 | REG8IN16(r, 0x0b) = d & 0xfe; |
| | 302 | return; |
| | 303 | case 0x0c: // ignored, always 0 |
| | 304 | return; |
| | 305 | case 0x0d: // DREQ dest |
| | 306 | case 0x0e: |
| | 307 | case 0x0f: |
| | 308 | case 0x10: // DREQ len |
| | 309 | REG8IN16(r, a) = d; |
| | 310 | return; |
| | 311 | case 0x11: |
| | 312 | REG8IN16(r, a) = d & 0xfc; |
| | 313 | return; |
| | 314 | // DREQ FIFO - writes to odd addr go to fifo |
| | 315 | // do writes to even work? Reads return 0 |
| | 316 | case 0x12: |
| | 317 | REG8IN16(r, a) = d; |
| | 318 | return; |
| | 319 | case 0x13: |
| | 320 | d = (REG8IN16(r, 0x12) << 8) | (d & 0xff); |
| | 321 | REG8IN16(r, 0x12) = 0; |
| | 322 | dreq0_write(r, d); |
| | 323 | return; |
| | 324 | case 0x14: // ignored, always 0 |
| | 325 | case 0x15: |
| | 326 | case 0x16: |
| | 327 | case 0x17: |
| | 328 | case 0x18: |
| | 329 | case 0x19: |
| | 330 | return; |
| | 331 | case 0x1a: // what's this? |
| | 332 | elprintf(EL_32X|EL_ANOMALY, "mystery w8 %02x %02x", a, d); |
| | 333 | REG8IN16(r, a) = d & 0x01; |
| | 334 | return; |
| | 335 | case 0x1b: // TV |
| | 336 | REG8IN16(r, a) = d & 0x01; |
| | 337 | return; |
| | 338 | case 0x1c: // ignored, always 0 |
| | 339 | case 0x1d: |
| | 340 | case 0x1e: |
| | 341 | case 0x1f: |
| | 342 | case 0x30: |
| | 343 | return; |
| | 344 | case 0x31: // PWM control |
| | 345 | REG8IN16(r, a) &= ~0x0f; |
| | 346 | REG8IN16(r, a) |= d & 0x0f; |
| | 347 | d = r[0x30 / 2]; |
| | 348 | goto pwm_write; |
| | 349 | case 0x32: // PWM cycle |
| | 350 | REG8IN16(r, a) = d & 0x0f; |
| | 351 | d = r[0x32 / 2]; |
| | 352 | goto pwm_write; |
| | 353 | case 0x33: |
| | 354 | REG8IN16(r, a) = d; |
| | 355 | d = r[0x32 / 2]; |
| | 356 | goto pwm_write; |
| | 357 | // PWM pulse regs.. Only writes to odd address send a value |
| | 358 | // to FIFO; reads are 0 (except status bits) |
| | 359 | case 0x34: |
| | 360 | case 0x36: |
| | 361 | case 0x38: |
| | 362 | REG8IN16(r, a) = d; |
| | 363 | return; |
| | 364 | case 0x35: |
| | 365 | case 0x37: |
| | 366 | case 0x39: |
| | 367 | d = (REG8IN16(r, a ^ 1) << 8) | (d & 0xff); |
| | 368 | REG8IN16(r, a ^ 1) = 0; |
| | 369 | goto pwm_write; |
| | 370 | case 0x3a: // ignored, always 0 |
| | 371 | case 0x3b: |
| | 372 | case 0x3c: |
| | 373 | case 0x3d: |
| | 374 | case 0x3e: |
| | 375 | case 0x3f: |
| | 376 | return; |
| | 377 | pwm_write: |
| | 378 | p32x_pwm_write16(a & ~1, d, NULL, SekCyclesDone()); |
| | 379 | return; |
| | 380 | } |
| | 381 | |
| | 382 | if ((a & 0x30) == 0x20) { |
| | 383 | int cycles = SekCyclesDone(); |
| | 384 | int comreg; |
| | 385 | |
| | 386 | if (REG8IN16(r, a) == d) |
| | 387 | return; |
| | 388 | |
| | 389 | p32x_sync_sh2s(cycles); |
| | 390 | |
| | 391 | REG8IN16(r, a) = d; |
| | 392 | p32x_sh2_poll_event(&sh2s[0], SH2_STATE_CPOLL, cycles); |
| | 393 | p32x_sh2_poll_event(&sh2s[1], SH2_STATE_CPOLL, cycles); |
| | 394 | comreg = 1 << (a & 0x0f) / 2; |
| | 395 | Pico32x.comm_dirty |= comreg; |
| | 396 | |
| | 397 | if (cycles - (int)msh2.m68krcycles_done > 120) |
| | 398 | p32x_sync_sh2s(cycles); |
| | 399 | return; |
| | 400 | } |
| | 401 | } |
| | 402 | |
| | 403 | static void p32x_reg_write16(u32 a, u32 d) |
| | 404 | { |
| | 405 | u16 *r = Pico32x.regs; |
| | 406 | a &= 0x3e; |
| | 407 | |
| | 408 | // for things like bset on comm port |
| | 409 | m68k_poll.cnt = 0; |
| | 410 | |
| | 411 | switch (a) { |
| | 412 | case 0x00: // adapter ctl |
| | 413 | if ((d ^ r[0]) & d & P32XS_nRES) |
| | 414 | p32x_reset_sh2s(); |
| | 415 | r[0] &= ~(P32XS_FM|P32XS_nRES|P32XS_ADEN); |
| | 416 | r[0] |= d & (P32XS_FM|P32XS_nRES|P32XS_ADEN); |
| | 417 | return; |
| | 418 | case 0x08: // DREQ src |
| | 419 | r[a / 2] = d & 0xff; |
| | 420 | return; |
| | 421 | case 0x0a: |
| | 422 | r[a / 2] = d & ~1; |
| | 423 | return; |
| | 424 | case 0x0c: // DREQ dest |
| | 425 | r[a / 2] = d & 0xff; |
| | 426 | return; |
| | 427 | case 0x0e: |
| | 428 | r[a / 2] = d; |
| | 429 | return; |
| | 430 | case 0x10: // DREQ len |
| | 431 | r[a / 2] = d & ~3; |
| | 432 | return; |
| | 433 | case 0x12: // FIFO reg |
| | 434 | dreq0_write(r, d); |
| | 435 | return; |
| | 436 | case 0x1a: // TV + mystery bit |
| | 437 | r[a / 2] = d & 0x0101; |
| | 438 | return; |
| | 439 | case 0x30: // PWM control |
| | 440 | d = (r[a / 2] & ~0x0f) | (d & 0x0f); |
| | 441 | r[a / 2] = d; |
| | 442 | p32x_pwm_write16(a, d, NULL, SekCyclesDone()); |
| | 443 | return; |
| | 444 | } |
| | 445 | |
| | 446 | // comm port |
| | 447 | if ((a & 0x30) == 0x20) { |
| | 448 | int cycles = SekCyclesDone(); |
| | 449 | int comreg; |
| | 450 | |
| | 451 | p32x_sync_sh2s(cycles); |
| | 452 | |
| | 453 | r[a / 2] = d; |
| | 454 | p32x_sh2_poll_event(&sh2s[0], SH2_STATE_CPOLL, cycles); |
| | 455 | p32x_sh2_poll_event(&sh2s[1], SH2_STATE_CPOLL, cycles); |
| | 456 | comreg = 1 << (a & 0x0f) / 2; |
| | 457 | Pico32x.comm_dirty |= comreg; |
| | 458 | return; |
| | 459 | } |
| | 460 | // PWM |
| | 461 | else if ((a & 0x30) == 0x30) { |
| | 462 | p32x_pwm_write16(a, d, NULL, SekCyclesDone()); |
| | 463 | return; |
| | 464 | } |
| | 465 | |
| | 466 | p32x_reg_write8(a + 1, d); |
| | 467 | } |
| | 468 | |
| | 469 | // ------------------------------------------------------------------ |
| | 470 | // VDP regs |
| | 471 | static u32 p32x_vdp_read16(u32 a) |
| | 472 | { |
| | 473 | u32 d; |
| | 474 | a &= 0x0e; |
| | 475 | |
| | 476 | d = Pico32x.vdp_regs[a / 2]; |
| | 477 | if (a == 0x0a) { |
| | 478 | // tested: FEN seems to be randomly pulsing on hcnt 0x80-0xf0, |
| | 479 | // most often at 0xb1-0xb5, even during vblank, |
| | 480 | // what's the deal with that? |
| | 481 | // we'll just fake it along with hblank for now |
| | 482 | Pico32x.vdp_fbcr_fake++; |
| | 483 | if (Pico32x.vdp_fbcr_fake & 4) |
| | 484 | d |= P32XV_HBLK; |
| | 485 | if ((Pico32x.vdp_fbcr_fake & 7) == 0) |
| | 486 | d |= P32XV_nFEN; |
| | 487 | } |
| | 488 | return d; |
| | 489 | } |
| | 490 | |
| | 491 | static void p32x_vdp_write8(u32 a, u32 d) |
| | 492 | { |
| | 493 | u16 *r = Pico32x.vdp_regs; |
| | 494 | a &= 0x0f; |
| | 495 | |
| | 496 | // TODO: verify what's writeable |
| | 497 | switch (a) { |
| | 498 | case 0x01: |
| | 499 | // priority inversion is handled in palette |
| | 500 | if ((r[0] ^ d) & P32XV_PRI) |
| | 501 | Pico32x.dirty_pal = 1; |
| | 502 | r[0] = (r[0] & P32XV_nPAL) | (d & 0xff); |
| | 503 | break; |
| | 504 | case 0x03: // shift (for pp mode) |
| | 505 | r[2 / 2] = d & 1; |
| | 506 | break; |
| | 507 | case 0x05: // fill len |
| | 508 | r[4 / 2] = d & 0xff; |
| | 509 | break; |
| | 510 | case 0x0b: |
| | 511 | d &= 1; |
| | 512 | Pico32x.pending_fb = d; |
| | 513 | // if we are blanking and FS bit is changing |
| | 514 | if (((r[0x0a/2] & P32XV_VBLK) || (r[0] & P32XV_Mx) == 0) && ((r[0x0a/2] ^ d) & P32XV_FS)) { |
| | 515 | r[0x0a/2] ^= P32XV_FS; |
| | 516 | Pico32xSwapDRAM(d ^ 1); |
| | 517 | elprintf(EL_32X, "VDP FS: %d", r[0x0a/2] & P32XV_FS); |
| | 518 | } |
| | 519 | break; |
| | 520 | } |
| | 521 | } |
| | 522 | |
| | 523 | static void p32x_vdp_write16(u32 a, u32 d, SH2 *sh2) |
| | 524 | { |
| | 525 | a &= 0x0e; |
| | 526 | if (a == 6) { // fill start |
| | 527 | Pico32x.vdp_regs[6 / 2] = d; |
| | 528 | return; |
| | 529 | } |
| | 530 | if (a == 8) { // fill data |
| | 531 | u16 *dram = Pico32xMem->dram[(Pico32x.vdp_regs[0x0a/2] & P32XV_FS) ^ 1]; |
| | 532 | int len = Pico32x.vdp_regs[4 / 2] + 1; |
| | 533 | int len1 = len; |
| | 534 | a = Pico32x.vdp_regs[6 / 2]; |
| | 535 | while (len1--) { |
| | 536 | dram[a] = d; |
| | 537 | a = (a & 0xff00) | ((a + 1) & 0xff); |
| | 538 | } |
| | 539 | Pico32x.vdp_regs[0x06 / 2] = a; |
| | 540 | Pico32x.vdp_regs[0x08 / 2] = d; |
| | 541 | if (sh2 != NULL && len > 4) { |
| | 542 | Pico32x.vdp_regs[0x0a / 2] |= P32XV_nFEN; |
| | 543 | // supposedly takes 3 bus/6 sh2 cycles? or 3 sh2 cycles? |
| | 544 | p32x_event_schedule_sh2(sh2, P32X_EVENT_FILLEND, 3 + len); |
| | 545 | } |
| | 546 | return; |
| | 547 | } |
| | 548 | |
| | 549 | p32x_vdp_write8(a | 1, d); |
| | 550 | } |
| | 551 | |
| | 552 | // ------------------------------------------------------------------ |
| | 553 | // SH2 regs |
| | 554 | |
| | 555 | static u32 p32x_sh2reg_read16(u32 a, SH2 *sh2) |
| | 556 | { |
| | 557 | u16 *r = Pico32x.regs; |
| | 558 | a &= 0x3e; |
| | 559 | |
| | 560 | switch (a) { |
| | 561 | case 0x00: // adapter/irq ctl |
| | 562 | return (r[0] & P32XS_FM) | Pico32x.sh2_regs[0] |
| | 563 | | Pico32x.sh2irq_mask[sh2->is_slave]; |
| | 564 | case 0x04: // H count (often as comm too) |
| | 565 | sh2_poll_detect(sh2, a, SH2_STATE_CPOLL, 3); |
| | 566 | sh2s_sync_on_read(sh2); |
| | 567 | return Pico32x.sh2_regs[4 / 2]; |
| | 568 | case 0x06: |
| | 569 | return (r[a / 2] & ~P32XS_FULL) | 0x4000; |
| | 570 | case 0x08: // DREQ src |
| | 571 | case 0x0a: |
| | 572 | case 0x0c: // DREQ dst |
| | 573 | case 0x0e: |
| | 574 | case 0x10: // DREQ len |
| | 575 | return r[a / 2]; |
| | 576 | case 0x12: // DREQ FIFO - does this work on hw? |
| | 577 | if (Pico32x.dmac0_fifo_ptr > 0) { |
| | 578 | Pico32x.dmac0_fifo_ptr--; |
| | 579 | r[a / 2] = Pico32x.dmac_fifo[0]; |
| | 580 | memmove(&Pico32x.dmac_fifo[0], &Pico32x.dmac_fifo[1], |
| | 581 | Pico32x.dmac0_fifo_ptr * 2); |
| | 582 | } |
| | 583 | return r[a / 2]; |
| | 584 | case 0x14: |
| | 585 | case 0x16: |
| | 586 | case 0x18: |
| | 587 | case 0x1a: |
| | 588 | case 0x1c: |
| | 589 | return 0; // ? |
| | 590 | } |
| | 591 | |
| | 592 | // comm port |
| | 593 | if ((a & 0x30) == 0x20) { |
| | 594 | sh2_poll_detect(sh2, a, SH2_STATE_CPOLL, 3); |
| | 595 | sh2s_sync_on_read(sh2); |
| | 596 | return r[a / 2]; |
| | 597 | } |
| | 598 | if ((a & 0x30) == 0x30) |
| | 599 | return p32x_pwm_read16(a, sh2, sh2_cycles_done_m68k(sh2)); |
| | 600 | |
| | 601 | elprintf_sh2(sh2, EL_32X|EL_ANOMALY, |
| | 602 | "unhandled sysreg r16 [%02x] @%08x", a, sh2_pc(sh2)); |
| | 603 | return 0; |
| | 604 | } |
| | 605 | |
| | 606 | static void p32x_sh2reg_write8(u32 a, u32 d, SH2 *sh2) |
| | 607 | { |
| | 608 | u16 *r = Pico32x.regs; |
| | 609 | u32 old; |
| | 610 | |
| | 611 | a &= 0x3f; |
| | 612 | sh2->poll_addr = 0; |
| | 613 | |
| | 614 | switch (a) { |
| | 615 | case 0x00: // FM |
| | 616 | r[0] &= ~P32XS_FM; |
| | 617 | r[0] |= (d << 8) & P32XS_FM; |
| | 618 | return; |
| | 619 | case 0x01: // HEN/irq masks |
| | 620 | old = Pico32x.sh2irq_mask[sh2->is_slave]; |
| | 621 | if ((d ^ old) & 1) |
| | 622 | p32x_pwm_sync_to_sh2(sh2); |
| | 623 | |
| | 624 | Pico32x.sh2irq_mask[sh2->is_slave] = d & 0x0f; |
| | 625 | Pico32x.sh2_regs[0] &= ~0x80; |
| | 626 | Pico32x.sh2_regs[0] |= d & 0x80; |
| | 627 | |
| | 628 | if ((d ^ old) & 1) |
| | 629 | p32x_pwm_schedule_sh2(sh2); |
| | 630 | if ((old ^ d) & 2) |
| | 631 | p32x_update_cmd_irq(sh2, 0); |
| | 632 | if ((old ^ d) & 4) |
| | 633 | p32x_schedule_hint(sh2, 0); |
| | 634 | return; |
| | 635 | case 0x04: // ignored? |
| | 636 | return; |
| | 637 | case 0x05: // H count |
| | 638 | d &= 0xff; |
| | 639 | if (Pico32x.sh2_regs[4 / 2] != d) { |
| | 640 | Pico32x.sh2_regs[4 / 2] = d; |
| | 641 | p32x_sh2_poll_event(sh2->other_sh2, SH2_STATE_CPOLL, |
| | 642 | sh2_cycles_done_m68k(sh2)); |
| | 643 | sh2_end_run(sh2, 4); |
| | 644 | } |
| | 645 | return; |
| | 646 | case 0x30: |
| | 647 | REG8IN16(r, a) = d & 0x0f; |
| | 648 | d = r[0x30 / 2]; |
| | 649 | goto pwm_write; |
| | 650 | case 0x31: // PWM control |
| | 651 | REG8IN16(r, a) = d & 0x8f; |
| | 652 | d = r[0x30 / 2]; |
| | 653 | goto pwm_write; |
| | 654 | case 0x32: // PWM cycle |
| | 655 | REG8IN16(r, a) = d & 0x0f; |
| | 656 | d = r[0x32 / 2]; |
| | 657 | goto pwm_write; |
| | 658 | case 0x33: |
| | 659 | REG8IN16(r, a) = d; |
| | 660 | d = r[0x32 / 2]; |
| | 661 | goto pwm_write; |
| | 662 | // PWM pulse regs.. Only writes to odd address send a value |
| | 663 | // to FIFO; reads are 0 (except status bits) |
| | 664 | case 0x34: |
| | 665 | case 0x36: |
| | 666 | case 0x38: |
| | 667 | REG8IN16(r, a) = d; |
| | 668 | return; |
| | 669 | case 0x35: |
| | 670 | case 0x37: |
| | 671 | case 0x39: |
| | 672 | d = (REG8IN16(r, a ^ 1) << 8) | (d & 0xff); |
| | 673 | REG8IN16(r, a ^ 1) = 0; |
| | 674 | goto pwm_write; |
| | 675 | case 0x3a: // ignored, always 0? |
| | 676 | case 0x3b: |
| | 677 | case 0x3c: |
| | 678 | case 0x3d: |
| | 679 | case 0x3e: |
| | 680 | case 0x3f: |
| | 681 | return; |
| | 682 | pwm_write: |
| | 683 | p32x_pwm_write16(a & ~1, d, sh2, 0); |
| | 684 | return; |
| | 685 | } |
| | 686 | |
| | 687 | if ((a & 0x30) == 0x20) { |
| | 688 | int comreg; |
| | 689 | if (REG8IN16(r, a) == d) |
| | 690 | return; |
| | 691 | |
| | 692 | REG8IN16(r, a) = d; |
| | 693 | p32x_m68k_poll_event(P32XF_68KCPOLL); |
| | 694 | p32x_sh2_poll_event(sh2->other_sh2, SH2_STATE_CPOLL, |
| | 695 | sh2_cycles_done_m68k(sh2)); |
| | 696 | comreg = 1 << (a & 0x0f) / 2; |
| | 697 | Pico32x.comm_dirty |= comreg; |
| | 698 | return; |
| | 699 | } |
| | 700 | |
| | 701 | elprintf(EL_32X|EL_ANOMALY, |
| | 702 | "unhandled sysreg w8 [%02x] %02x @%08x", a, d, sh2_pc(sh2)); |
| | 703 | } |
| | 704 | |
| | 705 | static void p32x_sh2reg_write16(u32 a, u32 d, SH2 *sh2) |
| | 706 | { |
| | 707 | a &= 0x3e; |
| | 708 | |
| | 709 | sh2->poll_addr = 0; |
| | 710 | |
| | 711 | // comm |
| | 712 | if ((a & 0x30) == 0x20) { |
| | 713 | int comreg; |
| | 714 | if (Pico32x.regs[a / 2] == d) |
| | 715 | return; |
| | 716 | |
| | 717 | Pico32x.regs[a / 2] = d; |
| | 718 | p32x_m68k_poll_event(P32XF_68KCPOLL); |
| | 719 | p32x_sh2_poll_event(sh2->other_sh2, SH2_STATE_CPOLL, |
| | 720 | sh2_cycles_done_m68k(sh2)); |
| | 721 | comreg = 1 << (a & 0x0f) / 2; |
| | 722 | Pico32x.comm_dirty |= comreg; |
| | 723 | return; |
| | 724 | } |
| | 725 | // PWM |
| | 726 | else if ((a & 0x30) == 0x30) { |
| | 727 | p32x_pwm_write16(a, d, sh2, sh2_cycles_done_m68k(sh2)); |
| | 728 | return; |
| | 729 | } |
| | 730 | |
| | 731 | switch (a) { |
| | 732 | case 0: // FM |
| | 733 | Pico32x.regs[0] &= ~P32XS_FM; |
| | 734 | Pico32x.regs[0] |= d & P32XS_FM; |
| | 735 | break; |
| | 736 | case 0x14: |
| | 737 | Pico32x.sh2irqs &= ~P32XI_VRES; |
| | 738 | goto irls; |
| | 739 | case 0x16: |
| | 740 | Pico32x.sh2irqi[sh2->is_slave] &= ~P32XI_VINT; |
| | 741 | goto irls; |
| | 742 | case 0x18: |
| | 743 | Pico32x.sh2irqi[sh2->is_slave] &= ~P32XI_HINT; |
| | 744 | goto irls; |
| | 745 | case 0x1a: |
| | 746 | Pico32x.regs[2 / 2] &= ~(1 << sh2->is_slave); |
| | 747 | p32x_update_cmd_irq(sh2, 0); |
| | 748 | return; |
| | 749 | case 0x1c: |
| | 750 | p32x_pwm_sync_to_sh2(sh2); |
| | 751 | Pico32x.sh2irqi[sh2->is_slave] &= ~P32XI_PWM; |
| | 752 | p32x_pwm_schedule_sh2(sh2); |
| | 753 | goto irls; |
| | 754 | } |
| | 755 | |
| | 756 | p32x_sh2reg_write8(a | 1, d, sh2); |
| | 757 | return; |
| | 758 | |
| | 759 | irls: |
| | 760 | p32x_update_irls(sh2, 0); |
| | 761 | } |
| | 762 | |
| | 763 | // ------------------------------------------------------------------ |
| | 764 | // 32x 68k handlers |
| | 765 | |
| | 766 | // after ADEN |
| | 767 | static u32 PicoRead8_32x_on(u32 a) |
| | 768 | { |
| | 769 | u32 d = 0; |
| | 770 | if ((a & 0xffc0) == 0x5100) { // a15100 |
| | 771 | d = p32x_reg_read16(a); |
| | 772 | goto out_16to8; |
| | 773 | } |
| | 774 | |
| | 775 | if ((a & 0xfc00) != 0x5000) { |
| | 776 | if (PicoIn.AHW & PAHW_MCD) |
| | 777 | return PicoRead8_mcd_io(a); |
| | 778 | else |
| | 779 | return PicoRead8_io(a); |
| | 780 | } |
| | 781 | |
| | 782 | if ((a & 0xfff0) == 0x5180) { // a15180 |
| | 783 | d = p32x_vdp_read16(a); |
| | 784 | goto out_16to8; |
| | 785 | } |
| | 786 | |
| | 787 | if ((a & 0xfe00) == 0x5200) { // a15200 |
| | 788 | d = Pico32xMem->pal[(a & 0x1ff) / 2]; |
| | 789 | goto out_16to8; |
| | 790 | } |
| | 791 | |
| | 792 | if ((a & 0xfffc) == 0x30ec) { // a130ec |
| | 793 | d = str_mars[a & 3]; |
| | 794 | goto out; |
| | 795 | } |
| | 796 | |
| | 797 | elprintf(EL_UIO, "m68k unmapped r8 [%06x] @%06x", a, SekPc); |
| | 798 | return d; |
| | 799 | |
| | 800 | out_16to8: |
| | 801 | if (a & 1) |
| | 802 | d &= 0xff; |
| | 803 | else |
| | 804 | d >>= 8; |
| | 805 | |
| | 806 | out: |
| | 807 | elprintf(EL_32X, "m68k 32x r8 [%06x] %02x @%06x", a, d, SekPc); |
| | 808 | return d; |
| | 809 | } |
| | 810 | |
| | 811 | static u32 PicoRead16_32x_on(u32 a) |
| | 812 | { |
| | 813 | u32 d = 0; |
| | 814 | if ((a & 0xffc0) == 0x5100) { // a15100 |
| | 815 | d = p32x_reg_read16(a); |
| | 816 | goto out; |
| | 817 | } |
| | 818 | |
| | 819 | if ((a & 0xfc00) != 0x5000) { |
| | 820 | if (PicoIn.AHW & PAHW_MCD) |
| | 821 | return PicoRead16_mcd_io(a); |
| | 822 | else |
| | 823 | return PicoRead16_io(a); |
| | 824 | } |
| | 825 | |
| | 826 | if ((a & 0xfff0) == 0x5180) { // a15180 |
| | 827 | d = p32x_vdp_read16(a); |
| | 828 | goto out; |
| | 829 | } |
| | 830 | |
| | 831 | if ((a & 0xfe00) == 0x5200) { // a15200 |
| | 832 | d = Pico32xMem->pal[(a & 0x1ff) / 2]; |
| | 833 | goto out; |
| | 834 | } |
| | 835 | |
| | 836 | if ((a & 0xfffc) == 0x30ec) { // a130ec |
| | 837 | d = !(a & 2) ? ('M'<<8)|'A' : ('R'<<8)|'S'; |
| | 838 | goto out; |
| | 839 | } |
| | 840 | |
| | 841 | elprintf(EL_UIO, "m68k unmapped r16 [%06x] @%06x", a, SekPc); |
| | 842 | return d; |
| | 843 | |
| | 844 | out: |
| | 845 | elprintf(EL_32X, "m68k 32x r16 [%06x] %04x @%06x", a, d, SekPc); |
| | 846 | return d; |
| | 847 | } |
| | 848 | |
| | 849 | static void PicoWrite8_32x_on(u32 a, u32 d) |
| | 850 | { |
| | 851 | if ((a & 0xfc00) == 0x5000) |
| | 852 | elprintf(EL_32X, "m68k 32x w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
| | 853 | |
| | 854 | if ((a & 0xffc0) == 0x5100) { // a15100 |
| | 855 | p32x_reg_write8(a, d); |
| | 856 | return; |
| | 857 | } |
| | 858 | |
| | 859 | if ((a & 0xfc00) != 0x5000) { |
| | 860 | if (PicoIn.AHW & PAHW_MCD) |
| | 861 | PicoWrite8_mcd_io(a, d); |
| | 862 | else |
| | 863 | PicoWrite8_io(a, d); |
| | 864 | if (a == 0xa130f1) |
| | 865 | bank_switch_rom_68k(Pico32x.regs[4 / 2]); |
| | 866 | return; |
| | 867 | } |
| | 868 | |
| | 869 | if (!(Pico32x.regs[0] & P32XS_FM)) { |
| | 870 | if ((a & 0xfff0) == 0x5180) { // a15180 |
| | 871 | p32x_vdp_write8(a, d); |
| | 872 | return; |
| | 873 | } |
| | 874 | |
| | 875 | // TODO: verify |
| | 876 | if ((a & 0xfe00) == 0x5200) { // a15200 |
| | 877 | elprintf(EL_32X|EL_ANOMALY, "m68k 32x PAL w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
| | 878 | ((u8 *)Pico32xMem->pal)[(a & 0x1ff) ^ 1] = d; |
| | 879 | Pico32x.dirty_pal = 1; |
| | 880 | return; |
| | 881 | } |
| | 882 | } |
| | 883 | |
| | 884 | elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
| | 885 | } |
| | 886 | |
| | 887 | static void PicoWrite16_32x_on(u32 a, u32 d) |
| | 888 | { |
| | 889 | if ((a & 0xfc00) == 0x5000) |
| | 890 | elprintf(EL_32X, "m68k 32x w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); |
| | 891 | |
| | 892 | if ((a & 0xffc0) == 0x5100) { // a15100 |
| | 893 | p32x_reg_write16(a, d); |
| | 894 | return; |
| | 895 | } |
| | 896 | |
| | 897 | if ((a & 0xfc00) != 0x5000) { |
| | 898 | if (PicoIn.AHW & PAHW_MCD) |
| | 899 | PicoWrite16_mcd_io(a, d); |
| | 900 | else |
| | 901 | PicoWrite16_io(a, d); |
| | 902 | if (a == 0xa130f0) |
| | 903 | bank_switch_rom_68k(Pico32x.regs[4 / 2]); |
| | 904 | return; |
| | 905 | } |
| | 906 | |
| | 907 | if (!(Pico32x.regs[0] & P32XS_FM)) { |
| | 908 | if ((a & 0xfff0) == 0x5180) { // a15180 |
| | 909 | p32x_vdp_write16(a, d, NULL); // FIXME? |
| | 910 | return; |
| | 911 | } |
| | 912 | |
| | 913 | if ((a & 0xfe00) == 0x5200) { // a15200 |
| | 914 | Pico32xMem->pal[(a & 0x1ff) / 2] = d; |
| | 915 | Pico32x.dirty_pal = 1; |
| | 916 | return; |
| | 917 | } |
| | 918 | } |
| | 919 | |
| | 920 | elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); |
| | 921 | } |
| | 922 | |
| | 923 | // before ADEN |
| | 924 | u32 PicoRead8_32x(u32 a) |
| | 925 | { |
| | 926 | u32 d = 0; |
| | 927 | |
| | 928 | if (PicoIn.opt & POPT_EN_32X) { |
| | 929 | if ((a & 0xffc0) == 0x5100) { // a15100 |
| | 930 | // regs are always readable |
| | 931 | d = ((u8 *)Pico32x.regs)[(a & 0x3f) ^ 1]; |
| | 932 | goto out; |
| | 933 | } |
| | 934 | |
| | 935 | if ((a & 0xfffc) == 0x30ec) { // a130ec |
| | 936 | d = str_mars[a & 3]; |
| | 937 | goto out; |
| | 938 | } |
| | 939 | } |
| | 940 | |
| | 941 | elprintf(EL_UIO, "m68k unmapped r8 [%06x] @%06x", a, SekPc); |
| | 942 | return d; |
| | 943 | |
| | 944 | out: |
| | 945 | elprintf(EL_32X, "m68k 32x r8 [%06x] %02x @%06x", a, d, SekPc); |
| | 946 | return d; |
| | 947 | } |
| | 948 | |
| | 949 | u32 PicoRead16_32x(u32 a) |
| | 950 | { |
| | 951 | u32 d = 0; |
| | 952 | |
| | 953 | if (PicoIn.opt & POPT_EN_32X) { |
| | 954 | if ((a & 0xffc0) == 0x5100) { // a15100 |
| | 955 | d = Pico32x.regs[(a & 0x3f) / 2]; |
| | 956 | goto out; |
| | 957 | } |
| | 958 | |
| | 959 | if ((a & 0xfffc) == 0x30ec) { // a130ec |
| | 960 | d = !(a & 2) ? ('M'<<8)|'A' : ('R'<<8)|'S'; |
| | 961 | goto out; |
| | 962 | } |
| | 963 | } |
| | 964 | |
| | 965 | elprintf(EL_UIO, "m68k unmapped r16 [%06x] @%06x", a, SekPc); |
| | 966 | return d; |
| | 967 | |
| | 968 | out: |
| | 969 | elprintf(EL_32X, "m68k 32x r16 [%06x] %04x @%06x", a, d, SekPc); |
| | 970 | return d; |
| | 971 | } |
| | 972 | |
| | 973 | void PicoWrite8_32x(u32 a, u32 d) |
| | 974 | { |
| | 975 | if ((PicoIn.opt & POPT_EN_32X) && (a & 0xffc0) == 0x5100) // a15100 |
| | 976 | { |
| | 977 | u16 *r = Pico32x.regs; |
| | 978 | |
| | 979 | elprintf(EL_32X, "m68k 32x w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
| | 980 | a &= 0x3f; |
| | 981 | if (a == 1) { |
| | 982 | if ((d ^ r[0]) & d & P32XS_ADEN) { |
| | 983 | Pico32xStartup(); |
| | 984 | r[0] &= ~P32XS_nRES; // causes reset if specified by this write |
| | 985 | r[0] |= P32XS_ADEN; |
| | 986 | p32x_reg_write8(a, d); // forward for reset processing |
| | 987 | } |
| | 988 | return; |
| | 989 | } |
| | 990 | |
| | 991 | // allow only COMM for now |
| | 992 | if ((a & 0x30) == 0x20) { |
| | 993 | u8 *r8 = (u8 *)r; |
| | 994 | r8[a ^ 1] = d; |
| | 995 | } |
| | 996 | return; |
| | 997 | } |
| | 998 | |
| | 999 | elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
| | 1000 | } |
| | 1001 | |
| | 1002 | void PicoWrite16_32x(u32 a, u32 d) |
| | 1003 | { |
| | 1004 | if ((PicoIn.opt & POPT_EN_32X) && (a & 0xffc0) == 0x5100) // a15100 |
| | 1005 | { |
| | 1006 | u16 *r = Pico32x.regs; |
| | 1007 | |
| | 1008 | elprintf(EL_UIO, "m68k 32x w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); |
| | 1009 | a &= 0x3e; |
| | 1010 | if (a == 0) { |
| | 1011 | if ((d ^ r[0]) & d & P32XS_ADEN) { |
| | 1012 | Pico32xStartup(); |
| | 1013 | r[0] &= ~P32XS_nRES; // causes reset if specified by this write |
| | 1014 | r[0] |= P32XS_ADEN; |
| | 1015 | p32x_reg_write16(a, d); // forward for reset processing |
| | 1016 | } |
| | 1017 | return; |
| | 1018 | } |
| | 1019 | |
| | 1020 | // allow only COMM for now |
| | 1021 | if ((a & 0x30) == 0x20) |
| | 1022 | r[a / 2] = d; |
| | 1023 | return; |
| | 1024 | } |
| | 1025 | |
| | 1026 | elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); |
| | 1027 | } |
| | 1028 | |
| | 1029 | /* quirk: in both normal and overwrite areas only nonzero values go through */ |
| | 1030 | #define sh2_write8_dramN(n) \ |
| | 1031 | if ((d & 0xff) != 0) { \ |
| | 1032 | u8 *dram = (u8 *)Pico32xMem->dram[n]; \ |
| | 1033 | dram[(a & 0x1ffff) ^ 1] = d; \ |
| | 1034 | } |
| | 1035 | |
| | 1036 | static void m68k_write8_dram0_ow(u32 a, u32 d) |
| | 1037 | { |
| | 1038 | sh2_write8_dramN(0); |
| | 1039 | } |
| | 1040 | |
| | 1041 | static void m68k_write8_dram1_ow(u32 a, u32 d) |
| | 1042 | { |
| | 1043 | sh2_write8_dramN(1); |
| | 1044 | } |
| | 1045 | |
| | 1046 | #define sh2_write16_dramN(n) \ |
| | 1047 | u16 *pd = &Pico32xMem->dram[n][(a & 0x1ffff) / 2]; \ |
| | 1048 | if (!(a & 0x20000)) { \ |
| | 1049 | *pd = d; \ |
| | 1050 | return; \ |
| | 1051 | } \ |
| | 1052 | /* overwrite */ \ |
| | 1053 | if (!(d & 0xff00)) d |= *pd & 0xff00; \ |
| | 1054 | if (!(d & 0x00ff)) d |= *pd & 0x00ff; \ |
| | 1055 | *pd = d; |
| | 1056 | |
| | 1057 | static void m68k_write16_dram0_ow(u32 a, u32 d) |
| | 1058 | { |
| | 1059 | sh2_write16_dramN(0); |
| | 1060 | } |
| | 1061 | |
| | 1062 | static void m68k_write16_dram1_ow(u32 a, u32 d) |
| | 1063 | { |
| | 1064 | sh2_write16_dramN(1); |
| | 1065 | } |
| | 1066 | |
| | 1067 | // ----------------------------------------------------------------- |
| | 1068 | |
| | 1069 | // hint vector is writeable |
| | 1070 | static void PicoWrite8_hint(u32 a, u32 d) |
| | 1071 | { |
| | 1072 | if ((a & 0xfffc) == 0x0070) { |
| | 1073 | Pico32xMem->m68k_rom[a ^ 1] = d; |
| | 1074 | return; |
| | 1075 | } |
| | 1076 | |
| | 1077 | elprintf(EL_UIO, "m68k unmapped w8 [%06x] %02x @%06x", |
| | 1078 | a, d & 0xff, SekPc); |
| | 1079 | } |
| | 1080 | |
| | 1081 | static void PicoWrite16_hint(u32 a, u32 d) |
| | 1082 | { |
| | 1083 | if ((a & 0xfffc) == 0x0070) { |
| | 1084 | ((u16 *)Pico32xMem->m68k_rom)[a/2] = d; |
| | 1085 | return; |
| | 1086 | } |
| | 1087 | |
| | 1088 | elprintf(EL_UIO, "m68k unmapped w16 [%06x] %04x @%06x", |
| | 1089 | a, d & 0xffff, SekPc); |
| | 1090 | } |
| | 1091 | |
| | 1092 | // normally not writable, but somebody could make a RAM cart |
| | 1093 | static void PicoWrite8_cart(u32 a, u32 d) |
| | 1094 | { |
| | 1095 | elprintf(EL_UIO, "m68k w8 [%06x] %02x @%06x", a, d & 0xff, SekPc); |
| | 1096 | |
| | 1097 | a &= 0xfffff; |
| | 1098 | m68k_write8(a, d); |
| | 1099 | } |
| | 1100 | |
| | 1101 | static void PicoWrite16_cart(u32 a, u32 d) |
| | 1102 | { |
| | 1103 | elprintf(EL_UIO, "m68k w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc); |
| | 1104 | |
| | 1105 | a &= 0xfffff; |
| | 1106 | m68k_write16(a, d); |
| | 1107 | } |
| | 1108 | |
| | 1109 | // same with bank, but save ram is sometimes here |
| | 1110 | static u32 PicoRead8_bank(u32 a) |
| | 1111 | { |
| | 1112 | a = (Pico32x.regs[4 / 2] << 20) | (a & 0xfffff); |
| | 1113 | return m68k_read8(a); |
| | 1114 | } |
| | 1115 | |
| | 1116 | static u32 PicoRead16_bank(u32 a) |
| | 1117 | { |
| | 1118 | a = (Pico32x.regs[4 / 2] << 20) | (a & 0xfffff); |
| | 1119 | return m68k_read16(a); |
| | 1120 | } |
| | 1121 | |
| | 1122 | static void PicoWrite8_bank(u32 a, u32 d) |
| | 1123 | { |
| | 1124 | if (!(Pico.m.sram_reg & SRR_MAPPED)) |
| | 1125 | elprintf(EL_UIO, "m68k w8 [%06x] %02x @%06x", |
| | 1126 | a, d & 0xff, SekPc); |
| | 1127 | |
| | 1128 | a = (Pico32x.regs[4 / 2] << 20) | (a & 0xfffff); |
| | 1129 | m68k_write8(a, d); |
| | 1130 | } |
| | 1131 | |
| | 1132 | static void PicoWrite16_bank(u32 a, u32 d) |
| | 1133 | { |
| | 1134 | if (!(Pico.m.sram_reg & SRR_MAPPED)) |
| | 1135 | elprintf(EL_UIO, "m68k w16 [%06x] %04x @%06x", |
| | 1136 | a, d & 0xffff, SekPc); |
| | 1137 | |
| | 1138 | a = (Pico32x.regs[4 / 2] << 20) | (a & 0xfffff); |
| | 1139 | m68k_write16(a, d); |
| | 1140 | } |
| | 1141 | |
| | 1142 | static void bank_map_handler(void) |
| | 1143 | { |
| | 1144 | cpu68k_map_set(m68k_read8_map, 0x900000, 0x9fffff, PicoRead8_bank, 1); |
| | 1145 | cpu68k_map_set(m68k_read16_map, 0x900000, 0x9fffff, PicoRead16_bank, 1); |
| | 1146 | } |
| | 1147 | |
| | 1148 | static void bank_switch_rom_68k(int b) |
| | 1149 | { |
| | 1150 | unsigned int rs, bank, bank2; |
| | 1151 | |
| | 1152 | if (Pico.m.ncart_in) |
| | 1153 | return; |
| | 1154 | |
| | 1155 | bank = b << 20; |
| | 1156 | if ((Pico.m.sram_reg & SRR_MAPPED) && bank == Pico.sv.start) { |
| | 1157 | bank_map_handler(); |
| | 1158 | return; |
| | 1159 | } |
| | 1160 | |
| | 1161 | if (bank >= Pico.romsize) { |
| | 1162 | elprintf(EL_32X|EL_ANOMALY, "missing bank @ %06x", bank); |
| | 1163 | bank_map_handler(); |
| | 1164 | return; |
| | 1165 | } |
| | 1166 | |
| | 1167 | // 32X ROM (XXX: consider mirroring?) |
| | 1168 | rs = (Pico.romsize + M68K_BANK_MASK) & ~M68K_BANK_MASK; |
| | 1169 | if (!carthw_ssf2_active) { |
| | 1170 | rs -= bank; |
| | 1171 | if (rs > 0x100000) |
| | 1172 | rs = 0x100000; |
| | 1173 | cpu68k_map_set(m68k_read8_map, 0x900000, 0x900000 + rs - 1, Pico.rom + bank, 0); |
| | 1174 | cpu68k_map_set(m68k_read16_map, 0x900000, 0x900000 + rs - 1, Pico.rom + bank, 0); |
| | 1175 | elprintf(EL_32X, "bank %06x-%06x -> %06x", 0x900000, 0x900000 + rs - 1, bank); |
| | 1176 | } |
| | 1177 | else { |
| | 1178 | bank = bank >> 19; |
| | 1179 | bank2 = carthw_ssf2_banks[bank + 0] << 19; |
| | 1180 | cpu68k_map_set(m68k_read8_map, 0x900000, 0x97ffff, Pico.rom + bank2, 0); |
| | 1181 | cpu68k_map_set(m68k_read16_map, 0x900000, 0x97ffff, Pico.rom + bank2, 0); |
| | 1182 | bank2 = carthw_ssf2_banks[bank + 1] << 19; |
| | 1183 | cpu68k_map_set(m68k_read8_map, 0x980000, 0x9fffff, Pico.rom + bank2, 0); |
| | 1184 | cpu68k_map_set(m68k_read16_map, 0x980000, 0x9fffff, Pico.rom + bank2, 0); |
| | 1185 | } |
| | 1186 | } |
| | 1187 | |
| | 1188 | // ----------------------------------------------------------------- |
| | 1189 | // SH2 |
| | 1190 | // ----------------------------------------------------------------- |
| | 1191 | |
| | 1192 | // read8 |
| | 1193 | static u32 sh2_read8_unmapped(u32 a, SH2 *sh2) |
| | 1194 | { |
| | 1195 | elprintf_sh2(sh2, EL_32X, "unmapped r8 [%08x] %02x @%06x", |
| | 1196 | a, 0, sh2_pc(sh2)); |
| | 1197 | return 0; |
| | 1198 | } |
| | 1199 | |
| | 1200 | static u32 sh2_read8_cs0(u32 a, SH2 *sh2) |
| | 1201 | { |
| | 1202 | u32 d = 0; |
| | 1203 | |
| | 1204 | sh2_burn_cycles(sh2, 1*2); |
| | 1205 | |
| | 1206 | // 0x3ffc0 is veridied |
| | 1207 | if ((a & 0x3ffc0) == 0x4000) { |
| | 1208 | d = p32x_sh2reg_read16(a, sh2); |
| | 1209 | goto out_16to8; |
| | 1210 | } |
| | 1211 | |
| | 1212 | if ((a & 0x3fff0) == 0x4100) { |
| | 1213 | d = p32x_vdp_read16(a); |
| | 1214 | sh2_poll_detect(sh2, a, SH2_STATE_VPOLL, 7); |
| | 1215 | goto out_16to8; |
| | 1216 | } |
| | 1217 | |
| | 1218 | // TODO: mirroring? |
| | 1219 | if (!sh2->is_slave && a < sizeof(Pico32xMem->sh2_rom_m)) |
| | 1220 | return Pico32xMem->sh2_rom_m.b[a ^ 1]; |
| | 1221 | if (sh2->is_slave && a < sizeof(Pico32xMem->sh2_rom_s)) |
| | 1222 | return Pico32xMem->sh2_rom_s.b[a ^ 1]; |
| | 1223 | |
| | 1224 | if ((a & 0x3fe00) == 0x4200) { |
| | 1225 | d = Pico32xMem->pal[(a & 0x1ff) / 2]; |
| | 1226 | goto out_16to8; |
| | 1227 | } |
| | 1228 | |
| | 1229 | return sh2_read8_unmapped(a, sh2); |
| | 1230 | |
| | 1231 | out_16to8: |
| | 1232 | if (a & 1) |
| | 1233 | d &= 0xff; |
| | 1234 | else |
| | 1235 | d >>= 8; |
| | 1236 | |
| | 1237 | elprintf_sh2(sh2, EL_32X, "r8 [%08x] %02x @%06x", |
| | 1238 | a, d, sh2_pc(sh2)); |
| | 1239 | return d; |
| | 1240 | } |
| | 1241 | |
| | 1242 | static u32 sh2_read8_da(u32 a, SH2 *sh2) |
| | 1243 | { |
| | 1244 | return sh2->data_array[(a & 0xfff) ^ 1]; |
| | 1245 | } |
| | 1246 | |
| | 1247 | // for ssf2 |
| | 1248 | static u32 sh2_read8_rom(u32 a, SH2 *sh2) |
| | 1249 | { |
| | 1250 | u32 bank = carthw_ssf2_banks[(a >> 19) & 7] << 19; |
| | 1251 | return Pico.rom[(bank + (a & 0x7ffff)) ^ 1]; |
| | 1252 | } |
| | 1253 | |
| | 1254 | // read16 |
| | 1255 | static u32 sh2_read16_unmapped(u32 a, SH2 *sh2) |
| | 1256 | { |
| | 1257 | elprintf_sh2(sh2, EL_32X, "unmapped r16 [%08x] %04x @%06x", |
| | 1258 | a, 0, sh2_pc(sh2)); |
| | 1259 | return 0; |
| | 1260 | } |
| | 1261 | |
| | 1262 | static u32 sh2_read16_cs0(u32 a, SH2 *sh2) |
| | 1263 | { |
| | 1264 | u32 d = 0; |
| | 1265 | |
| | 1266 | sh2_burn_cycles(sh2, 1*2); |
| | 1267 | |
| | 1268 | if ((a & 0x3ffc0) == 0x4000) { |
| | 1269 | d = p32x_sh2reg_read16(a, sh2); |
| | 1270 | if (!(EL_LOGMASK & EL_PWM) && (a & 0x30) == 0x30) // hide PWM |
| | 1271 | return d; |
| | 1272 | goto out; |
| | 1273 | } |
| | 1274 | |
| | 1275 | if ((a & 0x3fff0) == 0x4100) { |
| | 1276 | d = p32x_vdp_read16(a); |
| | 1277 | sh2_poll_detect(sh2, a, SH2_STATE_VPOLL, 7); |
| | 1278 | goto out; |
| | 1279 | } |
| | 1280 | |
| | 1281 | if (!sh2->is_slave && a < sizeof(Pico32xMem->sh2_rom_m)) |
| | 1282 | return Pico32xMem->sh2_rom_m.w[a / 2]; |
| | 1283 | if (sh2->is_slave && a < sizeof(Pico32xMem->sh2_rom_s)) |
| | 1284 | return Pico32xMem->sh2_rom_s.w[a / 2]; |
| | 1285 | |
| | 1286 | if ((a & 0x3fe00) == 0x4200) { |
| | 1287 | d = Pico32xMem->pal[(a & 0x1ff) / 2]; |
| | 1288 | goto out; |
| | 1289 | } |
| | 1290 | |
| | 1291 | return sh2_read16_unmapped(a, sh2); |
| | 1292 | |
| | 1293 | out: |
| | 1294 | elprintf_sh2(sh2, EL_32X, "r16 [%08x] %04x @%06x", |
| | 1295 | a, d, sh2_pc(sh2)); |
| | 1296 | return d; |
| | 1297 | } |
| | 1298 | |
| | 1299 | static u32 sh2_read16_da(u32 a, SH2 *sh2) |
| | 1300 | { |
| | 1301 | return ((u16 *)sh2->data_array)[(a & 0xfff) / 2]; |
| | 1302 | } |
| | 1303 | |
| | 1304 | static u32 sh2_read16_rom(u32 a, SH2 *sh2) |
| | 1305 | { |
| | 1306 | u32 bank = carthw_ssf2_banks[(a >> 19) & 7] << 19; |
| | 1307 | return *(u16 *)(Pico.rom + bank + (a & 0x7fffe)); |
| | 1308 | } |
| | 1309 | |
| | 1310 | // writes |
| | 1311 | static void REGPARM(3) sh2_write_ignore(u32 a, u32 d, SH2 *sh2) |
| | 1312 | { |
| | 1313 | } |
| | 1314 | |
| | 1315 | // write8 |
| | 1316 | static void REGPARM(3) sh2_write8_unmapped(u32 a, u32 d, SH2 *sh2) |
| | 1317 | { |
| | 1318 | elprintf_sh2(sh2, EL_32X, "unmapped w8 [%08x] %02x @%06x", |
| | 1319 | a, d & 0xff, sh2_pc(sh2)); |
| | 1320 | } |
| | 1321 | |
| | 1322 | static void REGPARM(3) sh2_write8_cs0(u32 a, u32 d, SH2 *sh2) |
| | 1323 | { |
| | 1324 | elprintf_sh2(sh2, EL_32X, "w8 [%08x] %02x @%06x", |
| | 1325 | a, d & 0xff, sh2_pc(sh2)); |
| | 1326 | |
| | 1327 | if (Pico32x.regs[0] & P32XS_FM) { |
| | 1328 | if ((a & 0x3fff0) == 0x4100) { |
| | 1329 | sh2->poll_addr = 0; |
| | 1330 | p32x_vdp_write8(a, d); |
| | 1331 | return; |
| | 1332 | } |
| | 1333 | } |
| | 1334 | |
| | 1335 | if ((a & 0x3ffc0) == 0x4000) { |
| | 1336 | p32x_sh2reg_write8(a, d, sh2); |
| | 1337 | return; |
| | 1338 | } |
| | 1339 | |
| | 1340 | sh2_write8_unmapped(a, d, sh2); |
| | 1341 | } |
| | 1342 | |
| | 1343 | static void REGPARM(3) sh2_write8_dram0(u32 a, u32 d, SH2 *sh2) |
| | 1344 | { |
| | 1345 | sh2_write8_dramN(0); |
| | 1346 | } |
| | 1347 | |
| | 1348 | static void REGPARM(3) sh2_write8_dram1(u32 a, u32 d, SH2 *sh2) |
| | 1349 | { |
| | 1350 | sh2_write8_dramN(1); |
| | 1351 | } |
| | 1352 | |
| | 1353 | static void REGPARM(3) sh2_write8_sdram(u32 a, u32 d, SH2 *sh2) |
| | 1354 | { |
| | 1355 | u32 a1 = a & 0x3ffff; |
| | 1356 | #ifdef DRC_SH2 |
| | 1357 | int t = Pico32xMem->drcblk_ram[a1 >> SH2_DRCBLK_RAM_SHIFT]; |
| | 1358 | if (t) |
| | 1359 | sh2_drc_wcheck_ram(a, t, sh2->is_slave); |
| | 1360 | #endif |
| | 1361 | Pico32xMem->sdram[a1 ^ 1] = d; |
| | 1362 | } |
| | 1363 | |
| | 1364 | static void REGPARM(3) sh2_write8_sdram_wt(u32 a, u32 d, SH2 *sh2) |
| | 1365 | { |
| | 1366 | // xmen sync hack.. |
| | 1367 | if (a < 0x26000200) |
| | 1368 | sh2_end_run(sh2, 32); |
| | 1369 | |
| | 1370 | sh2_write8_sdram(a, d, sh2); |
| | 1371 | } |
| | 1372 | |
| | 1373 | static void REGPARM(3) sh2_write8_da(u32 a, u32 d, SH2 *sh2) |
| | 1374 | { |
| | 1375 | u32 a1 = a & 0xfff; |
| | 1376 | #ifdef DRC_SH2 |
| | 1377 | int id = sh2->is_slave; |
| | 1378 | int t = Pico32xMem->drcblk_da[id][a1 >> SH2_DRCBLK_DA_SHIFT]; |
| | 1379 | if (t) |
| | 1380 | sh2_drc_wcheck_da(a, t, id); |
| | 1381 | #endif |
| | 1382 | sh2->data_array[a1 ^ 1] = d; |
| | 1383 | } |
| | 1384 | |
| | 1385 | // write16 |
| | 1386 | static void REGPARM(3) sh2_write16_unmapped(u32 a, u32 d, SH2 *sh2) |
| | 1387 | { |
| | 1388 | elprintf_sh2(sh2, EL_32X, "unmapped w16 [%08x] %04x @%06x", |
| | 1389 | a, d & 0xffff, sh2_pc(sh2)); |
| | 1390 | } |
| | 1391 | |
| | 1392 | static void REGPARM(3) sh2_write16_cs0(u32 a, u32 d, SH2 *sh2) |
| | 1393 | { |
| | 1394 | if (((EL_LOGMASK & EL_PWM) || (a & 0x30) != 0x30)) // hide PWM |
| | 1395 | elprintf_sh2(sh2, EL_32X, "w16 [%08x] %04x @%06x", |
| | 1396 | a, d & 0xffff, sh2_pc(sh2)); |
| | 1397 | |
| | 1398 | if (Pico32x.regs[0] & P32XS_FM) { |
| | 1399 | if ((a & 0x3fff0) == 0x4100) { |
| | 1400 | sh2->poll_addr = 0; |
| | 1401 | p32x_vdp_write16(a, d, sh2); |
| | 1402 | return; |
| | 1403 | } |
| | 1404 | |
| | 1405 | if ((a & 0x3fe00) == 0x4200) { |
| | 1406 | Pico32xMem->pal[(a & 0x1ff) / 2] = d; |
| | 1407 | Pico32x.dirty_pal = 1; |
| | 1408 | return; |
| | 1409 | } |
| | 1410 | } |
| | 1411 | |
| | 1412 | if ((a & 0x3ffc0) == 0x4000) { |
| | 1413 | p32x_sh2reg_write16(a, d, sh2); |
| | 1414 | return; |
| | 1415 | } |
| | 1416 | |
| | 1417 | sh2_write16_unmapped(a, d, sh2); |
| | 1418 | } |
| | 1419 | |
| | 1420 | static void REGPARM(3) sh2_write16_dram0(u32 a, u32 d, SH2 *sh2) |
| | 1421 | { |
| | 1422 | sh2_write16_dramN(0); |
| | 1423 | } |
| | 1424 | |
| | 1425 | static void REGPARM(3) sh2_write16_dram1(u32 a, u32 d, SH2 *sh2) |
| | 1426 | { |
| | 1427 | sh2_write16_dramN(1); |
| | 1428 | } |
| | 1429 | |
| | 1430 | static void REGPARM(3) sh2_write16_sdram(u32 a, u32 d, SH2 *sh2) |
| | 1431 | { |
| | 1432 | u32 a1 = a & 0x3ffff; |
| | 1433 | #ifdef DRC_SH2 |
| | 1434 | int t = Pico32xMem->drcblk_ram[a1 >> SH2_DRCBLK_RAM_SHIFT]; |
| | 1435 | if (t) |
| | 1436 | sh2_drc_wcheck_ram(a, t, sh2->is_slave); |
| | 1437 | #endif |
| | 1438 | ((u16 *)Pico32xMem->sdram)[a1 / 2] = d; |
| | 1439 | } |
| | 1440 | |
| | 1441 | static void REGPARM(3) sh2_write16_da(u32 a, u32 d, SH2 *sh2) |
| | 1442 | { |
| | 1443 | u32 a1 = a & 0xfff; |
| | 1444 | #ifdef DRC_SH2 |
| | 1445 | int id = sh2->is_slave; |
| | 1446 | int t = Pico32xMem->drcblk_da[id][a1 >> SH2_DRCBLK_DA_SHIFT]; |
| | 1447 | if (t) |
| | 1448 | sh2_drc_wcheck_da(a, t, id); |
| | 1449 | #endif |
| | 1450 | ((u16 *)sh2->data_array)[a1 / 2] = d; |
| | 1451 | } |
| | 1452 | |
| | 1453 | |
| | 1454 | typedef u32 (sh2_read_handler)(u32 a, SH2 *sh2); |
| | 1455 | typedef void REGPARM(3) (sh2_write_handler)(u32 a, u32 d, SH2 *sh2); |
| | 1456 | |
| | 1457 | #define SH2MAP_ADDR2OFFS_R(a) \ |
| | 1458 | ((u32)(a) >> SH2_READ_SHIFT) |
| | 1459 | |
| | 1460 | #define SH2MAP_ADDR2OFFS_W(a) \ |
| | 1461 | ((u32)(a) >> SH2_WRITE_SHIFT) |
| | 1462 | |
| | 1463 | u32 REGPARM(2) p32x_sh2_read8(u32 a, SH2 *sh2) |
| | 1464 | { |
| | 1465 | const sh2_memmap *sh2_map = sh2->read8_map; |
| | 1466 | uptr p; |
| | 1467 | |
| | 1468 | sh2_map += SH2MAP_ADDR2OFFS_R(a); |
| | 1469 | p = sh2_map->addr; |
| | 1470 | if (map_flag_set(p)) |
| | 1471 | return ((sh2_read_handler *)(p << 1))(a, sh2); |
| | 1472 | else |
| | 1473 | return *(u8 *)((p << 1) + ((a & sh2_map->mask) ^ 1)); |
| | 1474 | } |
| | 1475 | |
| | 1476 | u32 REGPARM(2) p32x_sh2_read16(u32 a, SH2 *sh2) |
| | 1477 | { |
| | 1478 | const sh2_memmap *sh2_map = sh2->read16_map; |
| | 1479 | uptr p; |
| | 1480 | |
| | 1481 | sh2_map += SH2MAP_ADDR2OFFS_R(a); |
| | 1482 | p = sh2_map->addr; |
| | 1483 | if (map_flag_set(p)) |
| | 1484 | return ((sh2_read_handler *)(p << 1))(a, sh2); |
| | 1485 | else |
| | 1486 | return *(u16 *)((p << 1) + ((a & sh2_map->mask) & ~1)); |
| | 1487 | } |
| | 1488 | |
| | 1489 | u32 REGPARM(2) p32x_sh2_read32(u32 a, SH2 *sh2) |
| | 1490 | { |
| | 1491 | const sh2_memmap *sh2_map = sh2->read16_map; |
| | 1492 | sh2_read_handler *handler; |
| | 1493 | u32 offs; |
| | 1494 | uptr p; |
| | 1495 | |
| | 1496 | offs = SH2MAP_ADDR2OFFS_R(a); |
| | 1497 | sh2_map += offs; |
| | 1498 | p = sh2_map->addr; |
| | 1499 | if (!map_flag_set(p)) { |
| | 1500 | // XXX: maybe 32bit access instead with ror? |
| | 1501 | u16 *pd = (u16 *)((p << 1) + ((a & sh2_map->mask) & ~1)); |
| | 1502 | return (pd[0] << 16) | pd[1]; |
| | 1503 | } |
| | 1504 | |
| | 1505 | if (offs == SH2MAP_ADDR2OFFS_R(0xffffc000)) |
| | 1506 | return sh2_peripheral_read32(a, sh2); |
| | 1507 | |
| | 1508 | handler = (sh2_read_handler *)(p << 1); |
| | 1509 | return (handler(a, sh2) << 16) | handler(a + 2, sh2); |
| | 1510 | } |
| | 1511 | |
| | 1512 | void REGPARM(3) p32x_sh2_write8(u32 a, u32 d, SH2 *sh2) |
| | 1513 | { |
| | 1514 | const void **sh2_wmap = sh2->write8_tab; |
| | 1515 | sh2_write_handler *wh; |
| | 1516 | |
| | 1517 | wh = sh2_wmap[SH2MAP_ADDR2OFFS_W(a)]; |
| | 1518 | wh(a, d, sh2); |
| | 1519 | } |
| | 1520 | |
| | 1521 | void REGPARM(3) p32x_sh2_write16(u32 a, u32 d, SH2 *sh2) |
| | 1522 | { |
| | 1523 | const void **sh2_wmap = sh2->write16_tab; |
| | 1524 | sh2_write_handler *wh; |
| | 1525 | |
| | 1526 | wh = sh2_wmap[SH2MAP_ADDR2OFFS_W(a)]; |
| | 1527 | wh(a, d, sh2); |
| | 1528 | } |
| | 1529 | |
| | 1530 | void REGPARM(3) p32x_sh2_write32(u32 a, u32 d, SH2 *sh2) |
| | 1531 | { |
| | 1532 | const void **sh2_wmap = sh2->write16_tab; |
| | 1533 | sh2_write_handler *wh; |
| | 1534 | u32 offs; |
| | 1535 | |
| | 1536 | offs = SH2MAP_ADDR2OFFS_W(a); |
| | 1537 | |
| | 1538 | if (offs == SH2MAP_ADDR2OFFS_W(0xffffc000)) { |
| | 1539 | sh2_peripheral_write32(a, d, sh2); |
| | 1540 | return; |
| | 1541 | } |
| | 1542 | |
| | 1543 | wh = sh2_wmap[offs]; |
| | 1544 | wh(a, d >> 16, sh2); |
| | 1545 | wh(a + 2, d, sh2); |
| | 1546 | } |
| | 1547 | |
| | 1548 | // ----------------------------------------------------------------- |
| | 1549 | |
| | 1550 | static void z80_md_bank_write_32x(unsigned int a, unsigned char d) |
| | 1551 | { |
| | 1552 | unsigned int addr68k; |
| | 1553 | |
| | 1554 | addr68k = Pico.m.z80_bank68k << 15; |
| | 1555 | addr68k += a & 0x7fff; |
| | 1556 | if ((addr68k & 0xfff000) == 0xa15000) |
| | 1557 | Pico32x.emu_flags |= P32XF_Z80_32X_IO; |
| | 1558 | |
| | 1559 | elprintf(EL_Z80BNK, "z80->68k w8 [%06x] %02x", addr68k, d); |
| | 1560 | m68k_write8(addr68k, d); |
| | 1561 | } |
| | 1562 | |
| | 1563 | // ----------------------------------------------------------------- |
| | 1564 | |
| | 1565 | static const u16 msh2_code[] = { |
| | 1566 | // trap instructions |
| | 1567 | 0xaffe, // 200 bra <self> |
| | 1568 | 0x0009, // 202 nop |
| | 1569 | // have to wait a bit until m68k initial program finishes clearing stuff |
| | 1570 | // to avoid races with game SH2 code, like in Tempo |
| | 1571 | 0xd406, // 204 mov.l @(_m_ok,pc), r4 |
| | 1572 | 0xc400, // 206 mov.b @(h'0,gbr),r0 |
| | 1573 | 0xc801, // 208 tst #1, r0 |
| | 1574 | 0x8b0f, // 20a bf cd_start |
| | 1575 | 0xd105, // 20c mov.l @(_cnt,pc), r1 |
| | 1576 | 0xd206, // 20e mov.l @(_start,pc), r2 |
| | 1577 | 0x71ff, // 210 add #-1, r1 |
| | 1578 | 0x4115, // 212 cmp/pl r1 |
| | 1579 | 0x89fc, // 214 bt -2 |
| | 1580 | 0x6043, // 216 mov r4, r0 |
| | 1581 | 0xc208, // 218 mov.l r0, @(h'20,gbr) |
| | 1582 | 0x6822, // 21a mov.l @r2, r8 |
| | 1583 | 0x482b, // 21c jmp @r8 |
| | 1584 | 0x0009, // 21e nop |
| | 1585 | ('M'<<8)|'_', ('O'<<8)|'K', // 220 _m_ok |
| | 1586 | 0x0001, 0x0000, // 224 _cnt |
| | 1587 | 0x2200, 0x03e0, // master start pointer in ROM |
| | 1588 | // cd_start: |
| | 1589 | 0xd20d, // 22c mov.l @(__cd_,pc), r2 |
| | 1590 | 0xc608, // 22e mov.l @(h'20,gbr), r0 |
| | 1591 | 0x3200, // 230 cmp/eq r0, r2 |
| | 1592 | 0x8bfc, // 232 bf #-2 |
| | 1593 | 0xe000, // 234 mov #0, r0 |
| | 1594 | 0xcf80, // 236 or.b #0x80,@(r0,gbr) |
| | 1595 | 0xd80b, // 238 mov.l @(_start_cd,pc), r8 // 24000018 |
| | 1596 | 0xd30c, // 23a mov.l @(_max_len,pc), r3 |
| | 1597 | 0x5b84, // 23c mov.l @(h'10,r8), r11 // master vbr |
| | 1598 | 0x5a82, // 23e mov.l @(8,r8), r10 // entry |
| | 1599 | 0x5081, // 240 mov.l @(4,r8), r0 // len |
| | 1600 | 0x5980, // 242 mov.l @(0,r8), r9 // dst |
| | 1601 | 0x3036, // 244 cmp/hi r3,r0 |
| | 1602 | 0x8b00, // 246 bf #1 |
| | 1603 | 0x6033, // 248 mov r3,r0 |
| | 1604 | 0x7820, // 24a add #0x20, r8 |
| | 1605 | // ipl_copy: |
| | 1606 | 0x6286, // 24c mov.l @r8+, r2 |
| | 1607 | 0x2922, // 24e mov.l r2, @r9 |
| | 1608 | 0x7904, // 250 add #4, r9 |
| | 1609 | 0x70fc, // 252 add #-4, r0 |
| | 1610 | 0x8800, // 254 cmp/eq #0, r0 |
| | 1611 | 0x8bf9, // 256 bf #-5 |
| | 1612 | // |
| | 1613 | 0x4b2e, // 258 ldc r11, vbr |
| | 1614 | 0x6043, // 25a mov r4, r0 // M_OK |
| | 1615 | 0xc208, // 25c mov.l r0, @(h'20,gbr) |
| | 1616 | 0x4a2b, // 25e jmp @r10 |
| | 1617 | 0x0009, // 260 nop |
| | 1618 | 0x0009, // 262 nop // pad |
| | 1619 | ('_'<<8)|'C', ('D'<<8)|'_', // 264 __cd_ |
| | 1620 | 0x2400, 0x0018, // 268 _start_cd |
| | 1621 | 0x0001, 0xffe0, // 26c _max_len |
| | 1622 | }; |
| | 1623 | |
| | 1624 | static const u16 ssh2_code[] = { |
| | 1625 | 0xaffe, // 200 bra <self> |
| | 1626 | 0x0009, // 202 nop |
| | 1627 | // code to wait for master, in case authentic master BIOS is used |
| | 1628 | 0xd106, // 204 mov.l @(_m_ok,pc), r1 |
| | 1629 | 0xd208, // 206 mov.l @(_start,pc), r2 |
| | 1630 | 0xc608, // 208 mov.l @(h'20,gbr), r0 |
| | 1631 | 0x3100, // 20a cmp/eq r0, r1 |
| | 1632 | 0x8bfc, // 20c bf #-2 |
| | 1633 | 0xc400, // 20e mov.b @(h'0,gbr),r0 |
| | 1634 | 0xc801, // 210 tst #1, r0 |
| | 1635 | 0xd004, // 212 mov.l @(_s_ok,pc), r0 |
| | 1636 | 0x8b0a, // 214 bf cd_start |
| | 1637 | 0xc209, // 216 mov.l r0, @(h'24,gbr) |
| | 1638 | 0x6822, // 218 mov.l @r2, r8 |
| | 1639 | 0x482b, // 21a jmp @r8 |
| | 1640 | 0x0009, // 21c nop |
| | 1641 | 0x0009, // 21e nop |
| | 1642 | ('M'<<8)|'_', ('O'<<8)|'K', // 220 |
| | 1643 | ('S'<<8)|'_', ('O'<<8)|'K', // 224 |
| | 1644 | 0x2200, 0x03e4, // slave start pointer in ROM |
| | 1645 | // cd_start: |
| | 1646 | 0xd803, // 22c mov.l @(_start_cd,pc), r8 // 24000018 |
| | 1647 | 0x5b85, // 22e mov.l @(h'14,r8), r11 // slave vbr |
| | 1648 | 0x5a83, // 230 mov.l @(h'0c,r8), r10 // entry |
| | 1649 | 0x4b2e, // 232 ldc r11, vbr |
| | 1650 | 0xc209, // 234 mov.l r0, @(h'24,gbr) // write S_OK |
| | 1651 | 0x4a2b, // 236 jmp @r10 |
| | 1652 | 0x0009, // 238 nop |
| | 1653 | 0x0009, // 23a nop |
| | 1654 | 0x2400, 0x0018, // 23c _start_cd |
| | 1655 | }; |
| | 1656 | |
| | 1657 | #define HWSWAP(x) (((u16)(x) << 16) | ((x) >> 16)) |
| | 1658 | static void get_bios(void) |
| | 1659 | { |
| | 1660 | u16 *ps; |
| | 1661 | u32 *pl; |
| | 1662 | int i; |
| | 1663 | |
| | 1664 | // M68K ROM |
| | 1665 | if (p32x_bios_g != NULL) { |
| | 1666 | elprintf(EL_STATUS|EL_32X, "32x: using supplied 68k BIOS"); |
| | 1667 | Byteswap(Pico32xMem->m68k_rom, p32x_bios_g, sizeof(Pico32xMem->m68k_rom)); |
| | 1668 | } |
| | 1669 | else { |
| | 1670 | static const u16 andb[] = { 0x0239, 0x00fe, 0x00a1, 0x5107 }; |
| | 1671 | static const u16 p_d4[] = { |
| | 1672 | 0x48e7, 0x8040, // movem.l d0/a1, -(sp) |
| | 1673 | 0x227c, 0x00a1, 0x30f1, // movea.l #0xa130f1, a1 |
| | 1674 | 0x7007, // moveq.l #7, d0 |
| | 1675 | 0x12d8, //0: move.b (a0)+, (a1)+ |
| | 1676 | 0x5289, // addq.l #1, a1 |
| | 1677 | 0x51c8, 0xfffa, // dbra d0, 0b |
| | 1678 | 0x0239, 0x00fe, 0x00a1, // and.b #0xfe, (0xa15107).l |
| | 1679 | 0x5107, |
| | 1680 | 0x4cdf, 0x0201 // movem.l (sp)+, d0/a1 |
| | 1681 | }; |
| | 1682 | |
| | 1683 | // generate 68k ROM |
| | 1684 | ps = (u16 *)Pico32xMem->m68k_rom; |
| | 1685 | pl = (u32 *)ps; |
| | 1686 | for (i = 1; i < 0xc0/4; i++) |
| | 1687 | pl[i] = HWSWAP(0x880200 + (i - 1) * 6); |
| | 1688 | pl[0x70/4] = 0; |
| | 1689 | |
| | 1690 | // fill with nops |
| | 1691 | for (i = 0xc0/2; i < 0x100/2; i++) |
| | 1692 | ps[i] = 0x4e71; |
| | 1693 | |
| | 1694 | // c0: don't need to care about RV - not emulated |
| | 1695 | ps[0xc8/2] = 0x1280; // move.b d0, (a1) |
| | 1696 | memcpy(ps + 0xca/2, andb, sizeof(andb)); // and.b #0xfe, (a15107) |
| | 1697 | ps[0xd2/2] = 0x4e75; // rts |
| | 1698 | // d4: |
| | 1699 | memcpy(ps + 0xd4/2, p_d4, sizeof(p_d4)); |
| | 1700 | ps[0xfe/2] = 0x4e75; // rts |
| | 1701 | } |
| | 1702 | // fill remaining m68k_rom page with game ROM |
| | 1703 | memcpy(Pico32xMem->m68k_rom_bank + sizeof(Pico32xMem->m68k_rom), |
| | 1704 | Pico.rom + sizeof(Pico32xMem->m68k_rom), |
| | 1705 | sizeof(Pico32xMem->m68k_rom_bank) - sizeof(Pico32xMem->m68k_rom)); |
| | 1706 | |
| | 1707 | // MSH2 |
| | 1708 | if (p32x_bios_m != NULL) { |
| | 1709 | elprintf(EL_STATUS|EL_32X, "32x: using supplied master SH2 BIOS"); |
| | 1710 | Byteswap(&Pico32xMem->sh2_rom_m, p32x_bios_m, sizeof(Pico32xMem->sh2_rom_m)); |
| | 1711 | } |
| | 1712 | else { |
| | 1713 | pl = (u32 *)&Pico32xMem->sh2_rom_m; |
| | 1714 | |
| | 1715 | // fill exception vector table to our trap address |
| | 1716 | for (i = 0; i < 128; i++) |
| | 1717 | pl[i] = HWSWAP(0x200); |
| | 1718 | |
| | 1719 | // start |
| | 1720 | pl[0] = pl[2] = HWSWAP(0x204); |
| | 1721 | // reset SP |
| | 1722 | pl[1] = pl[3] = HWSWAP(0x6040000); |
| | 1723 | |
| | 1724 | // startup code |
| | 1725 | memcpy(&Pico32xMem->sh2_rom_m.b[0x200], msh2_code, sizeof(msh2_code)); |
| | 1726 | } |
| | 1727 | |
| | 1728 | // SSH2 |
| | 1729 | if (p32x_bios_s != NULL) { |
| | 1730 | elprintf(EL_STATUS|EL_32X, "32x: using supplied slave SH2 BIOS"); |
| | 1731 | Byteswap(&Pico32xMem->sh2_rom_s, p32x_bios_s, sizeof(Pico32xMem->sh2_rom_s)); |
| | 1732 | } |
| | 1733 | else { |
| | 1734 | pl = (u32 *)&Pico32xMem->sh2_rom_s; |
| | 1735 | |
| | 1736 | // fill exception vector table to our trap address |
| | 1737 | for (i = 0; i < 128; i++) |
| | 1738 | pl[i] = HWSWAP(0x200); |
| | 1739 | |
| | 1740 | // start |
| | 1741 | pl[0] = pl[2] = HWSWAP(0x204); |
| | 1742 | // reset SP |
| | 1743 | pl[1] = pl[3] = HWSWAP(0x603f800); |
| | 1744 | |
| | 1745 | // startup code |
| | 1746 | memcpy(&Pico32xMem->sh2_rom_s.b[0x200], ssh2_code, sizeof(ssh2_code)); |
| | 1747 | } |
| | 1748 | } |
| | 1749 | |
| | 1750 | #define MAP_MEMORY(m) ((uptr)(m) >> 1) |
| | 1751 | #define MAP_HANDLER(h) ( ((uptr)(h) >> 1) | ((uptr)1 << (sizeof(uptr) * 8 - 1)) ) |
| | 1752 | |
| | 1753 | static sh2_memmap sh2_read8_map[0x80], sh2_read16_map[0x80]; |
| | 1754 | // for writes we are using handlers only |
| | 1755 | static sh2_write_handler *sh2_write8_map[0x80], *sh2_write16_map[0x80]; |
| | 1756 | |
| | 1757 | void Pico32xSwapDRAM(int b) |
| | 1758 | { |
| | 1759 | cpu68k_map_set(m68k_read8_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0); |
| | 1760 | cpu68k_map_set(m68k_read16_map, 0x840000, 0x85ffff, Pico32xMem->dram[b], 0); |
| | 1761 | cpu68k_map_set(m68k_read8_map, 0x860000, 0x87ffff, Pico32xMem->dram[b], 0); |
| | 1762 | cpu68k_map_set(m68k_read16_map, 0x860000, 0x87ffff, Pico32xMem->dram[b], 0); |
| | 1763 | cpu68k_map_set(m68k_write8_map, 0x840000, 0x87ffff, |
| | 1764 | b ? m68k_write8_dram1_ow : m68k_write8_dram0_ow, 1); |
| | 1765 | cpu68k_map_set(m68k_write16_map, 0x840000, 0x87ffff, |
| | 1766 | b ? m68k_write16_dram1_ow : m68k_write16_dram0_ow, 1); |
| | 1767 | |
| | 1768 | // SH2 |
| | 1769 | sh2_read8_map[0x04/2].addr = sh2_read8_map[0x24/2].addr = |
| | 1770 | sh2_read16_map[0x04/2].addr = sh2_read16_map[0x24/2].addr = MAP_MEMORY(Pico32xMem->dram[b]); |
| | 1771 | |
| | 1772 | sh2_write8_map[0x04/2] = sh2_write8_map[0x24/2] = b ? sh2_write8_dram1 : sh2_write8_dram0; |
| | 1773 | sh2_write16_map[0x04/2] = sh2_write16_map[0x24/2] = b ? sh2_write16_dram1 : sh2_write16_dram0; |
| | 1774 | } |
| | 1775 | |
| | 1776 | static void bank_switch_rom_sh2(void) |
| | 1777 | { |
| | 1778 | if (!carthw_ssf2_active) { |
| | 1779 | // easy |
| | 1780 | sh2_read8_map[0x02/2].addr = sh2_read8_map[0x22/2].addr = |
| | 1781 | sh2_read16_map[0x02/2].addr = sh2_read16_map[0x22/2].addr = MAP_MEMORY(Pico.rom); |
| | 1782 | } |
| | 1783 | else { |
| | 1784 | sh2_read8_map[0x02/2].addr = sh2_read8_map[0x22/2].addr = MAP_HANDLER(sh2_read8_rom); |
| | 1785 | sh2_read16_map[0x02/2].addr = sh2_read16_map[0x22/2].addr = MAP_HANDLER(sh2_read16_rom); |
| | 1786 | } |
| | 1787 | } |
| | 1788 | |
| | 1789 | void PicoMemSetup32x(void) |
| | 1790 | { |
| | 1791 | unsigned int rs; |
| | 1792 | int i; |
| | 1793 | |
| | 1794 | Pico32xMem = plat_mmap(0x06000000, sizeof(*Pico32xMem), 0, 0); |
| | 1795 | if (Pico32xMem == NULL) { |
| | 1796 | elprintf(EL_STATUS, "OOM"); |
| | 1797 | return; |
| | 1798 | } |
| | 1799 | |
| | 1800 | get_bios(); |
| | 1801 | |
| | 1802 | // cartridge area becomes unmapped |
| | 1803 | // XXX: we take the easy way and don't unmap ROM, |
| | 1804 | // so that we can avoid handling the RV bit. |
| | 1805 | // m68k_map_unmap(0x000000, 0x3fffff); |
| | 1806 | |
| | 1807 | if (!Pico.m.ncart_in) { |
| | 1808 | // MD ROM area |
| | 1809 | rs = sizeof(Pico32xMem->m68k_rom_bank); |
| | 1810 | cpu68k_map_set(m68k_read8_map, 0x000000, rs - 1, Pico32xMem->m68k_rom_bank, 0); |
| | 1811 | cpu68k_map_set(m68k_read16_map, 0x000000, rs - 1, Pico32xMem->m68k_rom_bank, 0); |
| | 1812 | cpu68k_map_set(m68k_write8_map, 0x000000, rs - 1, PicoWrite8_hint, 1); // TODO verify |
| | 1813 | cpu68k_map_set(m68k_write16_map, 0x000000, rs - 1, PicoWrite16_hint, 1); |
| | 1814 | |
| | 1815 | // 32X ROM (unbanked, XXX: consider mirroring?) |
| | 1816 | rs = (Pico.romsize + M68K_BANK_MASK) & ~M68K_BANK_MASK; |
| | 1817 | if (rs > 0x80000) |
| | 1818 | rs = 0x80000; |
| | 1819 | cpu68k_map_set(m68k_read8_map, 0x880000, 0x880000 + rs - 1, Pico.rom, 0); |
| | 1820 | cpu68k_map_set(m68k_read16_map, 0x880000, 0x880000 + rs - 1, Pico.rom, 0); |
| | 1821 | cpu68k_map_set(m68k_write8_map, 0x880000, 0x880000 + rs - 1, PicoWrite8_cart, 1); |
| | 1822 | cpu68k_map_set(m68k_write16_map, 0x880000, 0x880000 + rs - 1, PicoWrite16_cart, 1); |
| | 1823 | |
| | 1824 | // 32X ROM (banked) |
| | 1825 | bank_switch_rom_68k(0); |
| | 1826 | cpu68k_map_set(m68k_write8_map, 0x900000, 0x9fffff, PicoWrite8_bank, 1); |
| | 1827 | cpu68k_map_set(m68k_write16_map, 0x900000, 0x9fffff, PicoWrite16_bank, 1); |
| | 1828 | } |
| | 1829 | |
| | 1830 | // SYS regs |
| | 1831 | cpu68k_map_set(m68k_read8_map, 0xa10000, 0xa1ffff, PicoRead8_32x_on, 1); |
| | 1832 | cpu68k_map_set(m68k_read16_map, 0xa10000, 0xa1ffff, PicoRead16_32x_on, 1); |
| | 1833 | cpu68k_map_set(m68k_write8_map, 0xa10000, 0xa1ffff, PicoWrite8_32x_on, 1); |
| | 1834 | cpu68k_map_set(m68k_write16_map, 0xa10000, 0xa1ffff, PicoWrite16_32x_on, 1); |
| | 1835 | |
| | 1836 | // SH2 maps: A31,A30,A29,CS1,CS0 |
| | 1837 | // all unmapped by default |
| | 1838 | for (i = 0; i < ARRAY_SIZE(sh2_read8_map); i++) { |
| | 1839 | sh2_read8_map[i].addr = MAP_HANDLER(sh2_read8_unmapped); |
| | 1840 | sh2_read16_map[i].addr = MAP_HANDLER(sh2_read16_unmapped); |
| | 1841 | } |
| | 1842 | |
| | 1843 | for (i = 0; i < ARRAY_SIZE(sh2_write8_map); i++) { |
| | 1844 | sh2_write8_map[i] = sh2_write8_unmapped; |
| | 1845 | sh2_write16_map[i] = sh2_write16_unmapped; |
| | 1846 | } |
| | 1847 | |
| | 1848 | // "purge area" |
| | 1849 | for (i = 0x40; i <= 0x5f; i++) { |
| | 1850 | sh2_write8_map[i >> 1] = |
| | 1851 | sh2_write16_map[i >> 1] = sh2_write_ignore; |
| | 1852 | } |
| | 1853 | |
| | 1854 | // CS0 |
| | 1855 | sh2_read8_map[0x00/2].addr = sh2_read8_map[0x20/2].addr = MAP_HANDLER(sh2_read8_cs0); |
| | 1856 | sh2_read16_map[0x00/2].addr = sh2_read16_map[0x20/2].addr = MAP_HANDLER(sh2_read16_cs0); |
| | 1857 | sh2_write8_map[0x00/2] = sh2_write8_map[0x20/2] = sh2_write8_cs0; |
| | 1858 | sh2_write16_map[0x00/2] = sh2_write16_map[0x20/2] = sh2_write16_cs0; |
| | 1859 | // CS1 - ROM |
| | 1860 | bank_switch_rom_sh2(); |
| | 1861 | sh2_read8_map[0x02/2].mask = sh2_read8_map[0x22/2].mask = |
| | 1862 | sh2_read16_map[0x02/2].mask = sh2_read16_map[0x22/2].mask = 0x3fffff; // FIXME |
| | 1863 | // CS2 - DRAM - done by Pico32xSwapDRAM() |
| | 1864 | sh2_read8_map[0x04/2].mask = sh2_read8_map[0x24/2].mask = |
| | 1865 | sh2_read16_map[0x04/2].mask = sh2_read16_map[0x24/2].mask = 0x01ffff; |
| | 1866 | // CS3 - SDRAM |
| | 1867 | sh2_read8_map[0x06/2].addr = sh2_read8_map[0x26/2].addr = |
| | 1868 | sh2_read16_map[0x06/2].addr = sh2_read16_map[0x26/2].addr = MAP_MEMORY(Pico32xMem->sdram); |
| | 1869 | sh2_write8_map[0x06/2] = sh2_write8_sdram; |
| | 1870 | sh2_write8_map[0x26/2] = sh2_write8_sdram_wt; |
| | 1871 | sh2_write16_map[0x06/2] = sh2_write16_map[0x26/2] = sh2_write16_sdram; |
| | 1872 | sh2_read8_map[0x06/2].mask = sh2_read8_map[0x26/2].mask = |
| | 1873 | sh2_read16_map[0x06/2].mask = sh2_read16_map[0x26/2].mask = 0x03ffff; |
| | 1874 | // SH2 data array |
| | 1875 | sh2_read8_map[0xc0/2].addr = MAP_HANDLER(sh2_read8_da); |
| | 1876 | sh2_read16_map[0xc0/2].addr = MAP_HANDLER(sh2_read16_da); |
| | 1877 | sh2_write8_map[0xc0/2] = sh2_write8_da; |
| | 1878 | sh2_write16_map[0xc0/2] = sh2_write16_da; |
| | 1879 | // SH2 IO |
| | 1880 | sh2_read8_map[0xff/2].addr = MAP_HANDLER(sh2_peripheral_read8); |
| | 1881 | sh2_read16_map[0xff/2].addr = MAP_HANDLER(sh2_peripheral_read16); |
| | 1882 | sh2_write8_map[0xff/2] = sh2_peripheral_write8; |
| | 1883 | sh2_write16_map[0xff/2] = sh2_peripheral_write16; |
| | 1884 | |
| | 1885 | // map DRAM area, both 68k and SH2 |
| | 1886 | Pico32xSwapDRAM(1); |
| | 1887 | |
| | 1888 | msh2.read8_map = ssh2.read8_map = sh2_read8_map; |
| | 1889 | msh2.read16_map = ssh2.read16_map = sh2_read16_map; |
| | 1890 | msh2.write8_tab = ssh2.write8_tab = (const void **)(void *)sh2_write8_map; |
| | 1891 | msh2.write16_tab = ssh2.write16_tab = (const void **)(void *)sh2_write16_map; |
| | 1892 | |
| | 1893 | sh2_drc_mem_setup(&msh2); |
| | 1894 | sh2_drc_mem_setup(&ssh2); |
| | 1895 | |
| | 1896 | // z80 hack |
| | 1897 | z80_map_set(z80_write_map, 0x8000, 0xffff, z80_md_bank_write_32x, 1); |
| | 1898 | } |
| | 1899 | |
| | 1900 | void p32x_update_banks(void) |
| | 1901 | { |
| | 1902 | bank_switch_rom_68k(Pico32x.regs[4 / 2]); |
| | 1903 | bank_switch_rom_sh2(); |
| | 1904 | if (Pico32x.emu_flags & P32XF_DRC_ROM_C) |
| | 1905 | sh2_drc_flush_all(); |
| | 1906 | } |
| | 1907 | |
| | 1908 | void Pico32xMemStateLoaded(void) |
| | 1909 | { |
| | 1910 | bank_switch_rom_68k(Pico32x.regs[4 / 2]); |
| | 1911 | Pico32xSwapDRAM((Pico32x.vdp_regs[0x0a / 2] & P32XV_FS) ^ P32XV_FS); |
| | 1912 | memset(Pico32xMem->pwm, 0, sizeof(Pico32xMem->pwm)); |
| | 1913 | Pico32x.dirty_pal = 1; |
| | 1914 | |
| | 1915 | Pico32x.emu_flags &= ~(P32XF_68KCPOLL | P32XF_68KVPOLL); |
| | 1916 | memset(&m68k_poll, 0, sizeof(m68k_poll)); |
| | 1917 | msh2.state = 0; |
| | 1918 | msh2.poll_addr = msh2.poll_cycles = msh2.poll_cnt = 0; |
| | 1919 | ssh2.state = 0; |
| | 1920 | ssh2.poll_addr = ssh2.poll_cycles = ssh2.poll_cnt = 0; |
| | 1921 | |
| | 1922 | sh2_drc_flush_all(); |
| | 1923 | } |
| | 1924 | |
| | 1925 | // vim:shiftwidth=2:ts=2:expandtab |
notaz.gp2x.de / picodrive.git / blame_incremental