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comparison segacd.c @ 2127:1bf30397dd45

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Fix one more test in mcd-verificator CDC DMA1
author Michael Pavone <pavone@retrodev.com>
date Sat, 12 Mar 2022 22:54:41 -0800
parents da1fae7d5407
children b0dcf5c9f353
comparison
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2126:da1fae7d5407 2127:1bf30397dd45
330 } 330 }
331 } 331 }
332 return vcontext; 332 return vcontext;
333 } 333 }
334 334
335 static void cdd_run(segacd_context *cd, uint32_t cycle)
336 {
337 cdd_mcu_run(&cd->cdd, cycle, cd->gate_array + GA_CDD_CTRL, &cd->cdc, &cd->fader);
338 lc8951_run(&cd->cdc, cycle);
339 }
340
335 static uint8_t pcm_read8(uint32_t address, void *vcontext) 341 static uint8_t pcm_read8(uint32_t address, void *vcontext)
336 { 342 {
337 m68k_context *m68k = vcontext; 343 m68k_context *m68k = vcontext;
338 segacd_context *cd = m68k->system; 344 segacd_context *cd = m68k->system;
339 if (address & 1) { 345 if (address & 1) {
346 //need to run CD drive because there may be a PCM DMA underway
347 cdd_run(cd, m68k->current_cycle);
340 rf5c164_run(&cd->pcm, m68k->current_cycle); 348 rf5c164_run(&cd->pcm, m68k->current_cycle);
341 return rf5c164_read(&cd->pcm, address >> 1); 349 return rf5c164_read(&cd->pcm, address >> 1);
342 } else { 350 } else {
343 return 0xFF; 351 return 0xFF;
344 } 352 }
352 static void *pcm_write8(uint32_t address, void *vcontext, uint8_t value) 360 static void *pcm_write8(uint32_t address, void *vcontext, uint8_t value)
353 { 361 {
354 m68k_context *m68k = vcontext; 362 m68k_context *m68k = vcontext;
355 segacd_context *cd = m68k->system; 363 segacd_context *cd = m68k->system;
356 if (address & 1) { 364 if (address & 1) {
365 //need to run CD drive because there may be a PCM DMA underway
366 cdd_run(cd, m68k->current_cycle);
357 rf5c164_run(&cd->pcm, m68k->current_cycle); 367 rf5c164_run(&cd->pcm, m68k->current_cycle);
358 rf5c164_write(&cd->pcm, address >> 1, value); 368 rf5c164_write(&cd->pcm, address >> 1, value);
359 } 369 }
360 return vcontext; 370 return vcontext;
361 } 371 }
388 cd->timer_value -= ticks; 398 cd->timer_value -= ticks;
389 if (!cd->timer_value) { 399 if (!cd->timer_value) {
390 cd->timer_pending = 1; 400 cd->timer_pending = 1;
391 } 401 }
392 } 402 }
393 }
394
395 static void cdd_run(segacd_context *cd, uint32_t cycle)
396 {
397 cdd_mcu_run(&cd->cdd, cycle, cd->gate_array + GA_CDD_CTRL, &cd->cdc, &cd->fader);
398 lc8951_run(&cd->cdc, cycle);
399 } 403 }
400 404
401 static uint32_t next_timer_int(segacd_context *cd) 405 static uint32_t next_timer_int(segacd_context *cd)
402 { 406 {
403 if (cd->timer_pending) { 407 if (cd->timer_pending) {