MSI MS-98D1 Manual page 50

V1.x industrial computer board
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WDT & GPIO
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 Register
mov
dx, SIO_INDEX_Port
mov
al, GPO_REG
out
dx, al
mov
dx, SIO_DATA_Port
in
al, dx
and
al, not GPO_0
or
al, GPO_0
out
dx, al
Exit SIO
;
mov
dx, SIO_INDEX_Port
mov
al, SIO_Lock_Value
out
dx, al
A-4
;clear al bit4 (GPO 0)
;set GPO 0

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