Intel EMB-H61A, Manual

Page: 90 / 91

I n d u s t r i al M o t he r b o ar d E M B - H6 1 A
Appendix D Electrical Specifications for I/O Ports
D-8
************************************************************************************
VOID
SIOEnterMBPnPMode()
{
IOWriteByte(SIOIndex, 0x87);
IOWriteByte(SIOIndex, 0x87);
}
VOID
SIOExitMBPnPMode()
{
IOWriteByte(SIOIndex, 0xAA);
}
VOID
SIOSelectLDN(byte LDN)
{
IOWriteByte(SIOIndex, 0x07); // SIO LDN Register Offset = 0x07
IOWriteByte(SIOData,
LDN
);
}
VOID
SIOBitSet(byte LDN, byte Register, byte BitNum, byte Value)
{
Byte TmpValue;
SIOEnterMBPnPMode();
SIOSelectLDN(byte
LDN
);
IOWriteByte(SIOIndex, Register);
TmpValue = IOReadByte(SIOData);
TmpValue &= ~(1 << BitNum);
TmpValue |= (Value << BitNum);
IOWriteByte(SIOData, TmpValue);
SIOExitMBPnPMode();
}
VOID
SIOByteSet(byte LDN, byte Register, byte Value)
{
SIOEnterMBPnPMode();
SIOSelectLDN(LDN);
IOWriteByte(SIOIndex, Register);
IOWriteByte(SIOData,
Value
);
SIOExitMBPnPMode();
}
************************************************************************************