MSI MS-9A66, User Manual, Page: 105 / 108

A-3
WDT, GPIO, DIO MS-9A66
GPIO Sample Code

GPI 0 ~ GPI 3
GPI 0 GPI 1 GPI 2 GPI 3
IO Address
SIO GPIO Register A2h A2h A2h A2h
Bit 0 1 2 7
Sample code #1 #1 #1 #1

GPO 0 ~ GPO 3
GPO 0 GPO 1 GPO 2 GPO 3
IO Address
SIO GPIO Register A1h A1h A1h A1h
Bit 3 4 5 6
Sample code #2 #2 #2 #2
SIO_INDEX_Port equ 04Eh
SIO_DATA_Port equ 04Fh
SIO_UnLock_Value equ 087h
SIO_Lock_Value equ 0AAh
SIO_LDN_GPIO equ 06h
SIO_GPIO_Data equ 0A1h
SIO_GPIO_Status equ 0A2h
GPI_0 equ 00000001b
GPO_0 equ 00001000b
Sample Code:
#1 : Get GPI 0 status
; Enable config mode
mov dx, SIO_INDEX_Port
mov al, SIO_UnLock_Value
out dx, al
jmp short $+2 ;Io_delay
jmp short $+2 ;Io_delay
out dx, al
; Switch GPIO Configuration for SIO LDN 0x06
mov dx, SIO_INDEX_Port
mov al, 07h
out dx, al
mov dx, SIO_DATA_Port
mov al, SIO_LDN_GPIO
out dx, al
; Get GPI 0 Pin Status Register