Nvidia IA32 User Manual page 94

Note1: Digital I/O Sample Code
//File of the Main.cpp
//===========================================================
//This code is for test IA30 Super I/O.
//===========================================================
#include <dos.h>
#include <conio.h>
#include <stdio.h>
#include <stdlib.h>
//============================================================
#define W83627EHG_INDEX_PORT 0x2E
#define W83627EHG_DATA_PORT 0x2F
//============================================================
#define W83627EHG_REG_LD 0x07
//============================================================
#define W83627EHG_UNLOCK 0x87
#define W83627EHG_LOCK 0xAA
//============================================================
void ClrKbBuf(void);
void Unlock_W83627EHG(void);
void Lock_W83627EHG(void);
void Set_W83627EHG_Reg(unsigned char,unsigned char);
unsigned char Get_W83627EHG_Reg(unsigned char);
int main ();
//============================================================
int main ()
{
unsigned char ucDO = 0; //data for digital output
unsigned char ucDI; //data for digital input
unsigned char ucBuf;
Set_W83627EHG_Reg(0x07,0x07);//switch to logic device 7
// PIN 121~128 function select
// Bit0 = 0 -> Game Port.
// = 1 -> GPIO1.
IA32 Motherboard User Manual
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