void OPL3LPTWrite(ushort reg, byte data)
{
int i;
short lpt_data;
short lpt_ctrl;
if (port == 0)
{
return;
}
lpt_data = (short)port;
lpt_ctrl = (short)(port + 2);
/* Select OPL3 register */
LPT.outportb(lpt_data, (short)(reg & 0xFF));
if (reg < 0x100)
{
LPT.outportb(lpt_ctrl, 13);
LPT.outportb(lpt_ctrl, 9);
LPT.outportb(lpt_ctrl, 13);
}
else
{
LPT.outportb(lpt_ctrl, 5);
LPT.outportb(lpt_ctrl, 1);
LPT.outportb(lpt_ctrl, 5);
}
/* Wait at least 3.3 microseconds */
for (i = 0; i < 6; i++)
{
LPT.inportb(lpt_ctrl);
}
/* Set value */
LPT.outportb(lpt_data, data);
LPT.outportb(lpt_ctrl, 12);
LPT.outportb(lpt_ctrl, 8);
LPT.outportb(lpt_ctrl, 12);
/* 3.3 microseconds is sufficient here as well for OPL3 */
for (i = 0; i < 6; i++)
{
LPT.inportb(lpt_ctrl);
}
}
public byte ReadRegister(int port)
{
return(LPT.inportb((short)port));
}