Mercurial > repos > blastem
diff ym2612.c @ 374:d42a8a3e4894
Fix YM2612 busy flag
author | Mike Pavone <pavone@retrodev.com> |
---|---|
date | Sun, 02 Jun 2013 21:12:43 -0700 |
parents | 0f8a759f1ff4 |
children | f6def5cdf1b4 |
line wrap: on
line diff
--- a/ym2612.c Sun Jun 02 21:12:26 2013 -0700 +++ b/ym2612.c Sun Jun 02 21:12:43 2013 -0700 @@ -87,6 +87,7 @@ #define MAX_ENVELOPE 0xFFC #define YM_DIVIDER 2 +#define CYCLE_NEVER 0xFFFFFFFF uint16_t round_fixed_point(double value, int dec_bits) { @@ -104,6 +105,7 @@ context->back_buffer = malloc(sizeof(*context->audio_buffer) * sample_limit*2); context->buffer_inc = (double)sample_rate / (double)(clock_rate/OP_UPDATE_PERIOD); context->sample_limit = sample_limit*2; + context->write_cycle = CYCLE_NEVER; for (int i = 0; i < NUM_OPERATORS; i++) { context->operators[i].envelope = MAX_ENVELOPE; context->operators[i].env_phase = PHASE_RELEASE; @@ -380,6 +382,7 @@ } if (context->current_cycle >= context->write_cycle + BUSY_CYCLES) { context->status &= 0x7F; + context->write_cycle = CYCLE_NEVER; } //printf("Done running YM2612 at cycle %d\n", context->current_cycle, to_cycle); } @@ -600,6 +603,7 @@ } context->write_cycle = context->current_cycle; + context->status |= 0x80; } uint8_t ym_read_status(ym2612_context * context)