Mercurial > repos > blastem
diff genesis.c @ 1904:8312e574100a
Implement selectable YM2612/YM3834 invalid status port behavior
| author | Michael Pavone <pavone@retrodev.com> |
|---|---|
| date | Wed, 26 Feb 2020 22:40:37 -0800 |
| parents | 32a3aa7b4a45 |
| children | 2d462aa78349 |
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--- a/genesis.c Tue Feb 25 20:03:04 2020 -0800 +++ b/genesis.c Wed Feb 26 22:40:37 2020 -0800 @@ -875,7 +875,7 @@ value = gen->zram[location & 0x1FFF]; } else if (location < 0x6000) { sync_sound(gen, context->current_cycle); - value = ym_read_status(gen->ym, context->current_cycle); + value = ym_read_status(gen->ym, context->current_cycle, location); } else { value = 0xFF; } @@ -988,7 +988,7 @@ z80_context * context = vcontext; genesis_context * gen = context->system; sync_sound(gen, context->Z80_CYCLE); - return ym_read_status(gen->ym, context->Z80_CYCLE); + return ym_read_status(gen->ym, context->Z80_CYCLE, location); } static uint8_t z80_read_bank(uint32_t location, void * vcontext) @@ -1420,6 +1420,10 @@ render_set_video_standard((gen->version_reg & HZ50) ? VID_PAL : VID_NTSC); gen->ym = malloc(sizeof(ym2612_context)); + char *fm = tern_find_ptr_default(model, "fm", "discrete 2612"); + if (!strcmp(fm + strlen(fm) -4, "3834")) { + system_opts |= YM_OPT_3834; + } ym_init(gen->ym, gen->master_clock, MCLKS_PER_YM, system_opts); gen->psg = malloc(sizeof(psg_context));