diff options
| -rw-r--r-- | ym2612.c | 4 |
1 files changed, 2 insertions, 2 deletions
@@ -519,7 +519,7 @@ void ym_run(ym2612_context * context, uint32_t to_cycle) if (operator->am) { uint16_t base_am = (context->lfo_am_step & 0x80 ? context->lfo_am_step : ~context->lfo_am_step) & 0x7E; if (ams_shift[chan->ams] >= 0) { - env += base_am >> ams_shift[chan->ams]; + env += (base_am >> ams_shift[chan->ams]) & MAX_ENVELOPE; } else { env += base_am << (-ams_shift[chan->ams]); } @@ -687,6 +687,7 @@ static uint32_t ym_calc_phase_inc(ym2612_context * context, ym_operator * operat inc = context->ch3_supp[index].fnum; if (channel->pms) { inc = inc * 2 + lfo_pm_table[(inc & 0x7F0) * 16 + channel->pms + context->lfo_pm_step]; + inc &= 0xFFF; } if (!context->ch3_supp[index].block) { inc >>= 1; @@ -855,7 +856,6 @@ void ym_data_write(ym2612_context * context, uint8_t value) operator->rates[PHASE_ATTACK] = value & 0x1F; break; case REG_DECAY_AM: - //TODO: AM flag for LFO operator->am = value & 0x80; operator->rates[PHASE_DECAY] = value & 0x1F; break; |