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The MPU-401 no longer issues IRQ's when in UART mode, even when started up intelligent mode, fixes MIDI playback in NT 3.5.

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OBattler
2018-09-04 13:45:48 +02:00
parent 2ea2316b34
commit 9a180ed33c
1 changed files with 4 additions and 2 deletions
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6
src/sound/snd_mpu401.c
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@@ -84,7 +84,8 @@ QueueByte(mpu_t *mpu, uint8_t data)
return;
}
if (mpu->queue_used == 0 && mpu->intelligent) {
if ((mpu->queue_used == 0) && (mpu->mode == M_INTELLIGENT)) {
// if (mpu->queue_used == 0 && mpu->intelligent) {
mpu->state.irq_pending=1;
picint(1 << mpu->irq);
}
@@ -339,8 +340,9 @@ MPU401_WriteCommand(mpu_t *mpu, uint8_t val)
case 0x3f: /* UART mode */
mpu401_log("MPU-401:Set UART mode %X\n",val);
QueueByte(mpu, MSG_MPU_ACK);
mpu->mode=M_UART;
break;
return;
default:;
//mpu401_log("MPU-401:Unhandled command %X",val);