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comparison blastem.c @ 458:848a3db9d0b0

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Remove extra 68K/VDP cycle sync
author Mike Pavone <pavone@retrodev.com>
date Sun, 08 Sep 2013 20:47:01 -0700
parents b491df8bdbc0
children a1d298119153
comparison
equal deleted inserted replaced
457:6a315728fede 458:848a3db9d0b0
345 blocked = vdp_control_port_write(v_context, value); 345 blocked = vdp_control_port_write(v_context, value);
346 } else { 346 } else {
347 blocked = 0; 347 blocked = 0;
348 } 348 }
349 } 349 }
350 context->current_cycle = v_context->cycles / MCLKS_PER_68K;
351 } else { 350 } else {
352 adjust_int_cycle(context, v_context); 351 adjust_int_cycle(context, v_context);
353 } 352 }
354 } else { 353 } else {
355 printf("Illegal write to HV Counter port %X\n", vdp_port); 354 printf("Illegal write to HV Counter port %X\n", vdp_port);
356 exit(1); 355 exit(1);
357 } 356 }
358 if (v_context->cycles != before_cycle) { 357 if (v_context->cycles != before_cycle) {
359 //printf("68K paused for %d cycles at cycle %d\n", v_context->cycles / MCLKS_PER_68K - context->current_cycle, context->current_cycle); 358 //printf("68K paused for %d (%d) cycles at cycle %d (%d)\n", v_context->cycles / MCLKS_PER_68K - context->current_cycle, v_context->cycles - before_cycle, context->current_cycle, before_cycle);
360 context->current_cycle = v_context->cycles / MCLKS_PER_68K; 359 context->current_cycle = v_context->cycles / MCLKS_PER_68K;
361 } 360 }
362 } else if (vdp_port < 0x18) { 361 } else if (vdp_port < 0x18) {
363 genesis_context * gen = context->system; 362 genesis_context * gen = context->system;
364 sync_sound(gen, context->current_cycle * MCLKS_PER_68K); 363 sync_sound(gen, context->current_cycle * MCLKS_PER_68K);
418 value = vdp_control_port_read(v_context); 417 value = vdp_control_port_read(v_context);
419 } else { 418 } else {
420 value = vdp_hv_counter_read(v_context); 419 value = vdp_hv_counter_read(v_context);
421 //printf("HV Counter: %X at cycle %d\n", value, v_context->cycles); 420 //printf("HV Counter: %X at cycle %d\n", value, v_context->cycles);
422 } 421 }
423 context->current_cycle = v_context->cycles/MCLKS_PER_68K;
424 } else { 422 } else {
425 printf("Illegal read from PSG or test register port %X\n", vdp_port); 423 printf("Illegal read from PSG or test register port %X\n", vdp_port);
426 exit(1); 424 exit(1);
427 } 425 }
428 return value; 426 return value;