Rosch Computer MS-98H4, Manual

Page: 51 / 52

A-3
WDT & GPIO MS-98H4
GPIO Sample Code

GPI 0 ~ GPI 3
GPI 0 GPI 1 GPI 2 GPI 3
IO Address
SIO GPIO Register 82h 82h 82h 82h
Bit 0 1 2 3
Sample code #1

GPO 0 ~ GPO 3
GPO 0 GPO 1 GPO 2 GPO 3
IO Address
SIO GPIO Register 81h 81h 81h 81h
Bit 4 5 6 7
Sample code #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
GPI_REG equ 082h
GPO_REG equ 081h
GPI_ADD equ 000h
GPO_ADD equ 000h
GPO_0 equ 00010000b
Sample Code:
#1 : Get GPI 0 status
; Enable config mode
mov dx, SIO_INDEX_Port
mov al, SIO_UnLock_Value