Aaeon SBC-658, User Manual

Page: 111 / 116

Appendix A Programming the Watchdog Timer 101
W977Write PROC
push dx
call EnterConfig ;; Enter Config Mode
call SelectDevice ;; Select logical device
mov dx,cs:CONFIG_PORT
out dx,al ;; Select register number
mov al,ah
mov dx,cs:DATA_PORT
out dx,al
call ExitConfig ;; Exit Config Mode
pop dx
ret
W977Write ENDP
end