MSI MS-98F6 Owner's Manual page 54

Industrial computer board
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mov
dx, SIO_INDEX_Port
mov
al, 07h
WDT & GPIO
out
dx, al
mov
dx, SIO_DATA_Port
mov
al, SIO_LDN_GPIO
out
dx, al
; Get GPI 0 Pin Status Register
mov
dx, SIO_INDEX_Port
mov
al, GPI_REG
out
dx, al
mov
dx, SIO_DATA_Port
in
al, dx
;al bit0 = GPI 0 status
Exit SIO
;
mov
dx, SIO_INDEX_Port
mov
al, SIO_Lock_Value
out
dx, al
#2 : Set GPO 0 status to high
; Enable config mode
mov
dx, SIO_INDEX_Port
mov
al, SIO_UnLock_Value
out
dx, al
jmp
short $+2
jmp
short $+2
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
; Set GPO 0 Pin to High
mov
dx, SIO_INDEX_Port
mov
al, GPO_REG
out
dx, al
mov
dx, SIO_DATA_Port
in
al, dx
or
al, GPO_0
out
dx, al
;al bit4 = GPO 0 status
Exit SIO
;
mov
dx, SIO_INDEX_Port
mov
al, SIO_Lock_Value
out
dx, al
A-4
;Io_delay
;Io_delay

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