Gpio Sample Code - MSI MS-98B5 Manual

GPIO Sample Code

GPI 0 ~ GPI 3
GPI 0
IO Address 53Ah
SIO GPIO Register
Bit 0
Sample code #1
GPO 0 ~ GPO 3
GPO 0
IO Address 50Ch
SIO GPIO Register
Bit 1
Sample code #2
GPI_ADD
GPI_ADD 1
GPI_ADD 2
GPO_ADD
GPO_ADD1
GPO_0
Sample Code:
Sample Code:
#1 : Get GPI 0 status
in al, GPI_ADD2
;al bit0 = GPI 3 status
#2 : Set GPO 0 to high status
mov dx, GPO_ADD
in al, dx
and al, Not GPO_0
or al, GPO_0
out dx, al
GPI 1 GPI 2 GPI 3
50Eh 538h 538h
6 2 3
#1 #1 #1
GPO 1 GPO 2 GPO 3
50Ch 50Ch 50Eh
6 7 1
#2 #2 #2
equ 50Eh
equ 538h
equ 53Ah
equ 50Ch
equ 50Eh
equ 00000010b
MS-98B5 MS-98B5
A-3