| 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 | #include "../pico_int.h" |
| 9 | #include "../sound/ym2612.h" |
| 10 | #include "../../cpu/sh2/compiler.h" |
| 11 | |
| 12 | struct Pico32x Pico32x; |
| 13 | SH2 sh2s[2]; |
| 14 | |
| 15 | #define SH2_IDLE_STATES (SH2_STATE_CPOLL|SH2_STATE_VPOLL|SH2_STATE_SLEEP) |
| 16 | |
| 17 | static int REGPARM(2) sh2_irq_cb(SH2 *sh2, int level) |
| 18 | { |
| 19 | if (sh2->pending_irl > sh2->pending_int_irq) { |
| 20 | elprintf(EL_32X, "%csh2 ack/irl %d @ %08x", |
| 21 | sh2->is_slave ? 's' : 'm', level, sh2->pc); |
| 22 | return 64 + sh2->pending_irl / 2; |
| 23 | } else { |
| 24 | elprintf(EL_32X, "%csh2 ack/int %d/%d @ %08x", |
| 25 | sh2->is_slave ? 's' : 'm', level, sh2->pending_int_vector, sh2->pc); |
| 26 | sh2->pending_int_irq = 0; // auto-clear |
| 27 | sh2->pending_level = sh2->pending_irl; |
| 28 | return sh2->pending_int_vector; |
| 29 | } |
| 30 | } |
| 31 | |
| 32 | // if !nested_call, must sync CPUs before calling this |
| 33 | void p32x_update_irls(SH2 *active_sh2) |
| 34 | { |
| 35 | int irqs, mlvl = 0, slvl = 0; |
| 36 | int m68k_cycles = 0; |
| 37 | int mrun, srun; |
| 38 | |
| 39 | if (active_sh2 != NULL) |
| 40 | m68k_cycles = sh2_cycles_done_m68k(active_sh2); |
| 41 | |
| 42 | // msh2 |
| 43 | irqs = (Pico32x.sh2irqs | Pico32x.sh2irqi[0]) & ((Pico32x.sh2irq_mask[0] << 3) | P32XI_VRES); |
| 44 | while ((irqs >>= 1)) |
| 45 | mlvl++; |
| 46 | mlvl *= 2; |
| 47 | |
| 48 | // ssh2 |
| 49 | irqs = (Pico32x.sh2irqs | Pico32x.sh2irqi[1]) & ((Pico32x.sh2irq_mask[1] << 3) | P32XI_VRES); |
| 50 | while ((irqs >>= 1)) |
| 51 | slvl++; |
| 52 | slvl *= 2; |
| 53 | |
| 54 | mrun = sh2_irl_irq(&msh2, mlvl, active_sh2 != NULL); |
| 55 | if (mrun) |
| 56 | p32x_sh2_poll_event(&msh2, SH2_IDLE_STATES, m68k_cycles); |
| 57 | |
| 58 | srun = sh2_irl_irq(&ssh2, slvl, active_sh2 != NULL); |
| 59 | if (srun) |
| 60 | p32x_sh2_poll_event(&ssh2, SH2_IDLE_STATES, m68k_cycles); |
| 61 | |
| 62 | elprintf(EL_32X, "update_irls: m %d/%d, s %d/%d", mlvl, mrun, slvl, srun); |
| 63 | } |
| 64 | |
| 65 | void Pico32xStartup(void) |
| 66 | { |
| 67 | elprintf(EL_STATUS|EL_32X, "32X startup"); |
| 68 | |
| 69 | // TODO: OOM handling |
| 70 | PicoAHW |= PAHW_32X; |
| 71 | sh2_init(&msh2, 0); |
| 72 | msh2.irq_callback = sh2_irq_cb; |
| 73 | sh2_init(&ssh2, 1); |
| 74 | ssh2.irq_callback = sh2_irq_cb; |
| 75 | |
| 76 | PicoMemSetup32x(); |
| 77 | p32x_timers_recalc(); |
| 78 | |
| 79 | if (!Pico.m.pal) |
| 80 | Pico32x.vdp_regs[0] |= P32XV_nPAL; |
| 81 | |
| 82 | PREG8(Pico32xMem->sh2_peri_regs[0], 4) = |
| 83 | PREG8(Pico32xMem->sh2_peri_regs[1], 4) = 0x84; // SCI SSR |
| 84 | |
| 85 | rendstatus_old = -1; |
| 86 | |
| 87 | emu_32x_startup(); |
| 88 | } |
| 89 | |
| 90 | #define HWSWAP(x) (((x) << 16) | ((x) >> 16)) |
| 91 | void p32x_reset_sh2s(void) |
| 92 | { |
| 93 | elprintf(EL_32X, "sh2 reset"); |
| 94 | |
| 95 | sh2_reset(&msh2); |
| 96 | sh2_reset(&ssh2); |
| 97 | |
| 98 | // if we don't have BIOS set, perform it's work here. |
| 99 | // MSH2 |
| 100 | if (p32x_bios_m == NULL) { |
| 101 | unsigned int idl_src, idl_dst, idl_size; // initial data load |
| 102 | unsigned int vbr; |
| 103 | |
| 104 | // initial data |
| 105 | idl_src = HWSWAP(*(unsigned int *)(Pico.rom + 0x3d4)) & ~0xf0000000; |
| 106 | idl_dst = HWSWAP(*(unsigned int *)(Pico.rom + 0x3d8)) & ~0xf0000000; |
| 107 | idl_size= HWSWAP(*(unsigned int *)(Pico.rom + 0x3dc)); |
| 108 | if (idl_size > Pico.romsize || idl_src + idl_size > Pico.romsize || |
| 109 | idl_size > 0x40000 || idl_dst + idl_size > 0x40000 || (idl_src & 3) || (idl_dst & 3)) { |
| 110 | elprintf(EL_STATUS|EL_ANOMALY, "32x: invalid initial data ptrs: %06x -> %06x, %06x", |
| 111 | idl_src, idl_dst, idl_size); |
| 112 | } |
| 113 | else |
| 114 | memcpy(Pico32xMem->sdram + idl_dst, Pico.rom + idl_src, idl_size); |
| 115 | |
| 116 | // GBR/VBR |
| 117 | vbr = HWSWAP(*(unsigned int *)(Pico.rom + 0x3e8)); |
| 118 | sh2_set_gbr(0, 0x20004000); |
| 119 | sh2_set_vbr(0, vbr); |
| 120 | |
| 121 | // checksum and M_OK |
| 122 | Pico32x.regs[0x28 / 2] = *(unsigned short *)(Pico.rom + 0x18e); |
| 123 | // program will set M_OK |
| 124 | } |
| 125 | |
| 126 | // SSH2 |
| 127 | if (p32x_bios_s == NULL) { |
| 128 | unsigned int vbr; |
| 129 | |
| 130 | // GBR/VBR |
| 131 | vbr = HWSWAP(*(unsigned int *)(Pico.rom + 0x3ec)); |
| 132 | sh2_set_gbr(1, 0x20004000); |
| 133 | sh2_set_vbr(1, vbr); |
| 134 | // program will set S_OK |
| 135 | } |
| 136 | |
| 137 | msh2.m68krcycles_done = ssh2.m68krcycles_done = SekCyclesDoneT(); |
| 138 | } |
| 139 | |
| 140 | void Pico32xInit(void) |
| 141 | { |
| 142 | if (msh2.mult_m68k_to_sh2 == 0 || msh2.mult_sh2_to_m68k == 0) |
| 143 | Pico32xSetClocks(PICO_MSH2_HZ, 0); |
| 144 | if (ssh2.mult_m68k_to_sh2 == 0 || ssh2.mult_sh2_to_m68k == 0) |
| 145 | Pico32xSetClocks(0, PICO_MSH2_HZ); |
| 146 | } |
| 147 | |
| 148 | void PicoPower32x(void) |
| 149 | { |
| 150 | memset(&Pico32x, 0, sizeof(Pico32x)); |
| 151 | |
| 152 | Pico32x.regs[0] = P32XS_REN|P32XS_nRES; // verified |
| 153 | Pico32x.vdp_regs[0x0a/2] = P32XV_VBLK|P32XV_HBLK|P32XV_PEN; |
| 154 | Pico32x.sh2_regs[0] = P32XS2_ADEN; |
| 155 | } |
| 156 | |
| 157 | void PicoUnload32x(void) |
| 158 | { |
| 159 | if (Pico32xMem != NULL) |
| 160 | plat_munmap(Pico32xMem, sizeof(*Pico32xMem)); |
| 161 | Pico32xMem = NULL; |
| 162 | sh2_finish(&msh2); |
| 163 | sh2_finish(&ssh2); |
| 164 | |
| 165 | PicoAHW &= ~PAHW_32X; |
| 166 | } |
| 167 | |
| 168 | void PicoReset32x(void) |
| 169 | { |
| 170 | if (PicoAHW & PAHW_32X) { |
| 171 | Pico32x.sh2irqs |= P32XI_VRES; |
| 172 | p32x_update_irls(NULL); |
| 173 | p32x_sh2_poll_event(&msh2, SH2_IDLE_STATES, 0); |
| 174 | p32x_sh2_poll_event(&ssh2, SH2_IDLE_STATES, 0); |
| 175 | p32x_timers_recalc(); |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | static void p32x_start_blank(void) |
| 180 | { |
| 181 | if (Pico32xDrawMode != PDM32X_OFF && !PicoSkipFrame) { |
| 182 | int offs, lines; |
| 183 | |
| 184 | pprof_start(draw); |
| 185 | |
| 186 | offs = 8; lines = 224; |
| 187 | if ((Pico.video.reg[1] & 8) && !(PicoOpt & POPT_ALT_RENDERER)) { |
| 188 | offs = 0; |
| 189 | lines = 240; |
| 190 | } |
| 191 | |
| 192 | // XXX: no proper handling of 32col mode.. |
| 193 | if ((Pico32x.vdp_regs[0] & P32XV_Mx) != 0 && // 32x not blanking |
| 194 | (Pico.video.reg[12] & 1) && // 40col mode |
| 195 | (PicoDrawMask & PDRAW_32X_ON)) |
| 196 | { |
| 197 | int md_bg = Pico.video.reg[7] & 0x3f; |
| 198 | |
| 199 | // we draw full layer (not line-by-line) |
| 200 | PicoDraw32xLayer(offs, lines, md_bg); |
| 201 | } |
| 202 | else if (Pico32xDrawMode != PDM32X_32X_ONLY) |
| 203 | PicoDraw32xLayerMdOnly(offs, lines); |
| 204 | |
| 205 | pprof_end(draw); |
| 206 | } |
| 207 | |
| 208 | // enter vblank |
| 209 | Pico32x.vdp_regs[0x0a/2] |= P32XV_VBLK|P32XV_PEN; |
| 210 | |
| 211 | // FB swap waits until vblank |
| 212 | if ((Pico32x.vdp_regs[0x0a/2] ^ Pico32x.pending_fb) & P32XV_FS) { |
| 213 | Pico32x.vdp_regs[0x0a/2] &= ~P32XV_FS; |
| 214 | Pico32x.vdp_regs[0x0a/2] |= Pico32x.pending_fb; |
| 215 | Pico32xSwapDRAM(Pico32x.pending_fb ^ 1); |
| 216 | } |
| 217 | |
| 218 | Pico32x.sh2irqs |= P32XI_VINT; |
| 219 | p32x_update_irls(NULL); |
| 220 | p32x_sh2_poll_event(&msh2, SH2_STATE_VPOLL, 0); |
| 221 | p32x_sh2_poll_event(&ssh2, SH2_STATE_VPOLL, 0); |
| 222 | } |
| 223 | |
| 224 | // compare cycles, handling overflows |
| 225 | // check if a > b |
| 226 | #define CYCLES_GT(a, b) \ |
| 227 | ((int)((a) - (b)) > 0) |
| 228 | // check if a >= b |
| 229 | #define CYCLES_GE(a, b) \ |
| 230 | ((int)((a) - (b)) >= 0) |
| 231 | |
| 232 | /* events */ |
| 233 | static void pwm_irq_event(unsigned int now) |
| 234 | { |
| 235 | Pico32x.emu_flags &= ~P32XF_PWM_PEND; |
| 236 | p32x_pwm_schedule(now); |
| 237 | |
| 238 | Pico32x.sh2irqs |= P32XI_PWM; |
| 239 | p32x_update_irls(NULL); |
| 240 | } |
| 241 | |
| 242 | static void fillend_event(unsigned int now) |
| 243 | { |
| 244 | Pico32x.vdp_regs[0x0a/2] &= ~P32XV_nFEN; |
| 245 | p32x_sh2_poll_event(&msh2, SH2_STATE_VPOLL, now); |
| 246 | p32x_sh2_poll_event(&ssh2, SH2_STATE_VPOLL, now); |
| 247 | } |
| 248 | |
| 249 | typedef void (event_cb)(unsigned int now); |
| 250 | |
| 251 | unsigned int event_times[P32X_EVENT_COUNT]; |
| 252 | static unsigned int event_time_next; |
| 253 | static event_cb *event_cbs[] = { |
| 254 | [P32X_EVENT_PWM] = pwm_irq_event, |
| 255 | [P32X_EVENT_FILLEND] = fillend_event, |
| 256 | }; |
| 257 | |
| 258 | // schedule event at some time 'after', in m68k clocks |
| 259 | void p32x_event_schedule(unsigned int now, enum p32x_event event, int after) |
| 260 | { |
| 261 | unsigned int when; |
| 262 | |
| 263 | when = (now + after) | 1; |
| 264 | |
| 265 | elprintf(EL_32X, "new event #%u %u->%u", event, now, when); |
| 266 | event_times[event] = when; |
| 267 | |
| 268 | if (event_time_next == 0 || CYCLES_GT(event_time_next, when)) |
| 269 | event_time_next = when; |
| 270 | } |
| 271 | |
| 272 | void p32x_event_schedule_sh2(SH2 *sh2, enum p32x_event event, int after) |
| 273 | { |
| 274 | unsigned int now = sh2_cycles_done_m68k(sh2); |
| 275 | int left_to_next; |
| 276 | |
| 277 | p32x_event_schedule(now, event, after); |
| 278 | |
| 279 | left_to_next = (event_time_next - now) * 3; |
| 280 | if (sh2_cycles_left(sh2) > left_to_next) |
| 281 | sh2_end_run(sh2, left_to_next); |
| 282 | } |
| 283 | |
| 284 | static void run_events(unsigned int until) |
| 285 | { |
| 286 | int oldest, oldest_diff, time; |
| 287 | int i, diff; |
| 288 | |
| 289 | while (1) { |
| 290 | oldest = -1, oldest_diff = 0x7fffffff; |
| 291 | |
| 292 | for (i = 0; i < P32X_EVENT_COUNT; i++) { |
| 293 | if (event_times[i]) { |
| 294 | diff = event_times[i] - until; |
| 295 | if (diff < oldest_diff) { |
| 296 | oldest_diff = diff; |
| 297 | oldest = i; |
| 298 | } |
| 299 | } |
| 300 | } |
| 301 | |
| 302 | if (oldest_diff <= 0) { |
| 303 | time = event_times[oldest]; |
| 304 | event_times[oldest] = 0; |
| 305 | elprintf(EL_32X, "run event #%d %u", oldest, time); |
| 306 | event_cbs[oldest](time); |
| 307 | } |
| 308 | else if (oldest_diff < 0x7fffffff) { |
| 309 | event_time_next = event_times[oldest]; |
| 310 | break; |
| 311 | } |
| 312 | else { |
| 313 | event_time_next = 0; |
| 314 | break; |
| 315 | } |
| 316 | } |
| 317 | |
| 318 | if (oldest != -1) |
| 319 | elprintf(EL_32X, "next event #%d at %u", oldest, event_time_next); |
| 320 | } |
| 321 | |
| 322 | static inline void run_sh2(SH2 *sh2, int m68k_cycles) |
| 323 | { |
| 324 | int cycles, done; |
| 325 | |
| 326 | pevt_log_sh2_o(sh2, EVT_RUN_START); |
| 327 | sh2->state |= SH2_STATE_RUN; |
| 328 | cycles = C_M68K_TO_SH2(*sh2, m68k_cycles); |
| 329 | elprintf(EL_32X, "%csh2 +run %u %d", |
| 330 | sh2->is_slave?'s':'m', sh2->m68krcycles_done, cycles); |
| 331 | |
| 332 | done = sh2_execute(sh2, cycles); |
| 333 | |
| 334 | sh2->m68krcycles_done += C_SH2_TO_M68K(*sh2, done); |
| 335 | sh2->state &= ~SH2_STATE_RUN; |
| 336 | pevt_log_sh2_o(sh2, EVT_RUN_END); |
| 337 | elprintf(EL_32X, "%csh2 -run %u %d", |
| 338 | sh2->is_slave?'s':'m', sh2->m68krcycles_done, done); |
| 339 | } |
| 340 | |
| 341 | // sync other sh2 to this one |
| 342 | // note: recursive call |
| 343 | void p32x_sync_other_sh2(SH2 *sh2, unsigned int m68k_target) |
| 344 | { |
| 345 | SH2 *osh2 = &sh2s[sh2->is_slave ^ 1]; |
| 346 | int left_to_event; |
| 347 | int m68k_cycles; |
| 348 | |
| 349 | if (osh2->state & SH2_STATE_RUN) |
| 350 | return; |
| 351 | |
| 352 | m68k_cycles = m68k_target - osh2->m68krcycles_done; |
| 353 | if (m68k_cycles < 200) |
| 354 | return; |
| 355 | |
| 356 | if (osh2->state & SH2_IDLE_STATES) { |
| 357 | osh2->m68krcycles_done = m68k_target; |
| 358 | return; |
| 359 | } |
| 360 | |
| 361 | elprintf(EL_32X, "%csh2 sync to %u %d", |
| 362 | osh2->is_slave?'s':'m', m68k_target, m68k_cycles); |
| 363 | |
| 364 | run_sh2(osh2, m68k_cycles); |
| 365 | |
| 366 | // there might be new event to schedule current sh2 to |
| 367 | if (event_time_next) { |
| 368 | left_to_event = event_time_next - m68k_target; |
| 369 | left_to_event *= 3; |
| 370 | if (sh2_cycles_left(sh2) > left_to_event) { |
| 371 | if (left_to_event < 1) |
| 372 | left_to_event = 1; |
| 373 | sh2_end_run(sh2, left_to_event); |
| 374 | } |
| 375 | } |
| 376 | } |
| 377 | |
| 378 | #define sync_sh2s_normal p32x_sync_sh2s |
| 379 | //#define sync_sh2s_lockstep p32x_sync_sh2s |
| 380 | |
| 381 | /* most timing is in 68k clock */ |
| 382 | void sync_sh2s_normal(unsigned int m68k_target) |
| 383 | { |
| 384 | unsigned int now, target, timer_cycles; |
| 385 | int cycles; |
| 386 | |
| 387 | elprintf(EL_32X, "sh2 sync to %u", m68k_target); |
| 388 | |
| 389 | if (!(Pico32x.regs[0] & P32XS_nRES)) { |
| 390 | msh2.m68krcycles_done = ssh2.m68krcycles_done = m68k_target; |
| 391 | return; // rare |
| 392 | } |
| 393 | |
| 394 | now = msh2.m68krcycles_done; |
| 395 | if (CYCLES_GT(now, ssh2.m68krcycles_done)) |
| 396 | now = ssh2.m68krcycles_done; |
| 397 | timer_cycles = now; |
| 398 | |
| 399 | while (CYCLES_GT(m68k_target, now)) |
| 400 | { |
| 401 | if (event_time_next && CYCLES_GE(now, event_time_next)) |
| 402 | run_events(now); |
| 403 | |
| 404 | target = m68k_target; |
| 405 | if (event_time_next && CYCLES_GT(target, event_time_next)) |
| 406 | target = event_time_next; |
| 407 | |
| 408 | while (CYCLES_GT(target, now)) |
| 409 | { |
| 410 | elprintf(EL_32X, "sh2 exec to %u %d,%d/%d, flags %x", target, |
| 411 | target - msh2.m68krcycles_done, target - ssh2.m68krcycles_done, |
| 412 | m68k_target - now, Pico32x.emu_flags); |
| 413 | |
| 414 | if (!(ssh2.state & SH2_IDLE_STATES)) { |
| 415 | cycles = target - ssh2.m68krcycles_done; |
| 416 | if (cycles > 0) { |
| 417 | run_sh2(&ssh2, cycles); |
| 418 | |
| 419 | if (event_time_next && CYCLES_GT(target, event_time_next)) |
| 420 | target = event_time_next; |
| 421 | } |
| 422 | } |
| 423 | |
| 424 | if (!(msh2.state & SH2_IDLE_STATES)) { |
| 425 | cycles = target - msh2.m68krcycles_done; |
| 426 | if (cycles > 0) { |
| 427 | run_sh2(&msh2, cycles); |
| 428 | |
| 429 | if (event_time_next && CYCLES_GT(target, event_time_next)) |
| 430 | target = event_time_next; |
| 431 | } |
| 432 | } |
| 433 | |
| 434 | now = target; |
| 435 | if (!(msh2.state & SH2_IDLE_STATES)) { |
| 436 | if (CYCLES_GT(now, msh2.m68krcycles_done)) |
| 437 | now = msh2.m68krcycles_done; |
| 438 | } |
| 439 | if (!(ssh2.state & SH2_IDLE_STATES)) { |
| 440 | if (CYCLES_GT(now, ssh2.m68krcycles_done)) |
| 441 | now = ssh2.m68krcycles_done; |
| 442 | } |
| 443 | } |
| 444 | |
| 445 | p32x_timers_do(now - timer_cycles); |
| 446 | timer_cycles = now; |
| 447 | } |
| 448 | |
| 449 | // advance idle CPUs |
| 450 | if (msh2.state & SH2_IDLE_STATES) { |
| 451 | if (CYCLES_GT(m68k_target, msh2.m68krcycles_done)) |
| 452 | msh2.m68krcycles_done = m68k_target; |
| 453 | } |
| 454 | if (ssh2.state & SH2_IDLE_STATES) { |
| 455 | if (CYCLES_GT(m68k_target, ssh2.m68krcycles_done)) |
| 456 | ssh2.m68krcycles_done = m68k_target; |
| 457 | } |
| 458 | } |
| 459 | |
| 460 | #define STEP_68K 24 |
| 461 | |
| 462 | void sync_sh2s_lockstep(unsigned int m68k_target) |
| 463 | { |
| 464 | unsigned int mcycles; |
| 465 | |
| 466 | mcycles = msh2.m68krcycles_done; |
| 467 | if (ssh2.m68krcycles_done < mcycles) |
| 468 | mcycles = ssh2.m68krcycles_done; |
| 469 | |
| 470 | while (mcycles < m68k_target) { |
| 471 | mcycles += STEP_68K; |
| 472 | sync_sh2s_normal(mcycles); |
| 473 | } |
| 474 | } |
| 475 | |
| 476 | #define CPUS_RUN(m68k_cycles,s68k_cycles) do { \ |
| 477 | SekRunM68k(m68k_cycles); \ |
| 478 | if (Pico32x.emu_flags & (P32XF_68KCPOLL|P32XF_68KVPOLL)) \ |
| 479 | p32x_sync_sh2s(SekCyclesDoneT2()); \ |
| 480 | } while (0) |
| 481 | |
| 482 | #define PICO_32X |
| 483 | #include "../pico_cmn.c" |
| 484 | |
| 485 | void PicoFrame32x(void) |
| 486 | { |
| 487 | Pico32x.vdp_regs[0x0a/2] &= ~P32XV_VBLK; // get out of vblank |
| 488 | if ((Pico32x.vdp_regs[0] & P32XV_Mx) != 0) // no forced blanking |
| 489 | Pico32x.vdp_regs[0x0a/2] &= ~P32XV_PEN; // no palette access |
| 490 | |
| 491 | p32x_sh2_poll_event(&msh2, SH2_STATE_VPOLL, 0); |
| 492 | p32x_sh2_poll_event(&ssh2, SH2_STATE_VPOLL, 0); |
| 493 | |
| 494 | PicoFrameStart(); |
| 495 | PicoFrameHints(); |
| 496 | sh2_drc_frame(); |
| 497 | |
| 498 | elprintf(EL_32X, "poll: %02x %02x %02x", |
| 499 | Pico32x.emu_flags & 3, msh2.state, ssh2.state); |
| 500 | } |
| 501 | |
| 502 | // calculate multipliers against 68k clock (7670442) |
| 503 | // normally * 3, but effectively slower due to high latencies everywhere |
| 504 | // however using something lower breaks MK2 animations |
| 505 | void Pico32xSetClocks(int msh2_hz, int ssh2_hz) |
| 506 | { |
| 507 | float m68k_clk = (float)(OSC_NTSC / 7); |
| 508 | if (msh2_hz > 0) { |
| 509 | msh2.mult_m68k_to_sh2 = (int)((float)msh2_hz * (1 << CYCLE_MULT_SHIFT) / m68k_clk); |
| 510 | msh2.mult_sh2_to_m68k = (int)(m68k_clk * (1 << CYCLE_MULT_SHIFT) / (float)msh2_hz); |
| 511 | } |
| 512 | if (ssh2_hz > 0) { |
| 513 | ssh2.mult_m68k_to_sh2 = (int)((float)ssh2_hz * (1 << CYCLE_MULT_SHIFT) / m68k_clk); |
| 514 | ssh2.mult_sh2_to_m68k = (int)(m68k_clk * (1 << CYCLE_MULT_SHIFT) / (float)ssh2_hz); |
| 515 | } |
| 516 | } |
| 517 | |
| 518 | void Pico32xStateLoaded(int is_early) |
| 519 | { |
| 520 | if (is_early) { |
| 521 | Pico32xMemStateLoaded(); |
| 522 | return; |
| 523 | } |
| 524 | |
| 525 | SekCycleCnt = 0; |
| 526 | sh2s[0].m68krcycles_done = sh2s[1].m68krcycles_done = SekCycleCntT; |
| 527 | p32x_update_irls(NULL); |
| 528 | p32x_timers_recalc(); |
| 529 | run_events(SekCycleCntT); |
| 530 | } |
| 531 | |
| 532 | // vim:shiftwidth=2:ts=2:expandtab |