BOSER Technology HS-7165, Manual

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3.21 8-bit GPIO Function
The HS-7165 offers one 8-bit input/output port.
z CN10: 8-bit GPIO
PIN Description PIN Description
1 VCC 2 GND
3 GD0 4 GD4
5 GD1 6 GD5
7 GD2 8 GD6
9 GD3 10 GD7
1 9
10 2
EX. Sample Code Using GPIO 5
#include <conio.h>
#include <stdio.h>
#include <io.h>
void main(void)
{
unsigned char byte_cr29;
outportb(0x2e, 0x87); // enter Super I/O configuration mode
outportb(0x2e, 0x87);
outportb(0x2e,0x29); // set CR29 bit 5
byte_cr29 = (inportb(0x2f) | 0x20); // to switch UARTA to GPIO5
outportb(0x2f, byte_cr29);
outportb(0x2e, 0x07); // locate logical device 8
outportb(0x2e, 0x08);
outportb(0x2e, 0x30); // set CR30 bit 1 (enable GPIO5)
outportb(0x2f, 0x02);
outportb(0x2e, 0xe0); // set GP54 ~ GP57
outportb(0x2f, 0x0F); // GP54 ~ GP57 as output pins
}