void philipsMidiWriteData(PhilipsMidi* midi, UInt8 value)
{
if (!(midi->status & STAT_TXEMPTY)) {
return;
}
if (midi->txPending == 0) {
midiIoTransmit(midi->midiIo, value);
midi->timeTrans = boardSystemTime() + midi->charTime;
boardTimerAdd(midi->timerTrans, midi->timeTrans);
midi->txPending = 1;
}
else {
midi->status &= ~STAT_TXEMPTY;
midi->txBuffer = value;
}
}
static void onTrans(PhilipsMidi* midi, UInt32 time)
{
midi->timeTrans = 0;
if (midi->status & STAT_TXEMPTY) {
midi->txPending = 0;
}
else {
midiIoTransmit(midi->midiIo, midi->txBuffer);
midi->timeTrans = boardSystemTime() + midi->charTime;
boardTimerAdd(midi->timerTrans, midi->timeTrans);
midi->status |= STAT_TXEMPTY;
if (midi->command & CMD_WRINT) {
boardSetInt(0x400);
midi->status |= ST_INT;
}
}
}
static void onTrans(YM2148* midi, UInt32 time)
{
midi->timeTrans = 0;
midiIoTransmit(midi->midiIo, midi->sendByte);
if (midi->status & STAT_TXRDY) {
midi->status |= STAT_TXEMPTY;
if (midi->command & CMD_TXINT) {
boardSetDataBus(midi->vector, 0, 0);
boardSetInt(0x800);
midi->status |= ST_INT;
}
}
else {
midi->status |= STAT_TXRDY;
midi->status &= ~STAT_TXEMPTY;
midi->sendByte = midi->sendBuffer;
midi->timeTrans = boardSystemTime() + midi->charTime;
boardTimerAdd(midi->timerTrans, midi->timeTrans);
}
}
/*****************************************
** I8251 callbacks
******************************************
*/
static int transmit(MSXMidi* msxMidi, UInt8 value)
{
midiIoTransmit(msxMidi->midiIo, value);
return 1;
}