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comparison genesis.c @ 1902:32a3aa7b4a45

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Fix YM2612 busy flag timing
author Michael Pavone <pavone@retrodev.com>
date Mon, 24 Feb 2020 20:06:29 -0800
parents 5433252329fb
children 8312e574100a
comparison
equal deleted inserted replaced
1901:5433252329fb 1902:32a3aa7b4a45
401 if (gen->mapper_type == MAPPER_JCART) { 401 if (gen->mapper_type == MAPPER_JCART) {
402 jcart_adjust_cycles(gen, deduction); 402 jcart_adjust_cycles(gen, deduction);
403 } 403 }
404 context->current_cycle -= deduction; 404 context->current_cycle -= deduction;
405 z80_adjust_cycles(z_context, deduction); 405 z80_adjust_cycles(z_context, deduction);
406 gen->ym->current_cycle -= deduction; 406 ym_adjust_cycles(gen->ym, deduction);
407 gen->psg->cycles -= deduction; 407 gen->psg->cycles -= deduction;
408 if (gen->ym->write_cycle != CYCLE_NEVER) {
409 gen->ym->write_cycle = gen->ym->write_cycle >= deduction ? gen->ym->write_cycle - deduction : 0;
410 }
411 if (gen->reset_cycle != CYCLE_NEVER) { 408 if (gen->reset_cycle != CYCLE_NEVER) {
412 gen->reset_cycle -= deduction; 409 gen->reset_cycle -= deduction;
413 } 410 }
414 } 411 }
415 } 412 }
876 location &= 0x7FFF; 873 location &= 0x7FFF;
877 if (location < 0x4000) { 874 if (location < 0x4000) {
878 value = gen->zram[location & 0x1FFF]; 875 value = gen->zram[location & 0x1FFF];
879 } else if (location < 0x6000) { 876 } else if (location < 0x6000) {
880 sync_sound(gen, context->current_cycle); 877 sync_sound(gen, context->current_cycle);
881 value = ym_read_status(gen->ym); 878 value = ym_read_status(gen->ym, context->current_cycle);
882 } else { 879 } else {
883 value = 0xFF; 880 value = 0xFF;
884 } 881 }
885 } else { 882 } else {
886 value = 0xFF; 883 value = 0xFF;
989 static uint8_t z80_read_ym(uint32_t location, void * vcontext) 986 static uint8_t z80_read_ym(uint32_t location, void * vcontext)
990 { 987 {
991 z80_context * context = vcontext; 988 z80_context * context = vcontext;
992 genesis_context * gen = context->system; 989 genesis_context * gen = context->system;
993 sync_sound(gen, context->Z80_CYCLE); 990 sync_sound(gen, context->Z80_CYCLE);
994 return ym_read_status(gen->ym); 991 return ym_read_status(gen->ym, context->Z80_CYCLE);
995 } 992 }
996 993
997 static uint8_t z80_read_bank(uint32_t location, void * vcontext) 994 static uint8_t z80_read_bank(uint32_t location, void * vcontext)
998 { 995 {
999 z80_context * context = vcontext; 996 z80_context * context = vcontext;