IBM All-in-One FC/Socket 370 Celeron, PCM-6890B manual EnterConfig endp

al,0aah ;; Specific value to exit Config ;; Mode

dx,cs:CONFIG_PORT dx,al

dx ax

Appendix A Programming the Watchdog Timer

;;Enter to I/O Chip Program Configuration Register Mode Enterv Config proc

push	ax
push	dx
mov	al,87h	;; Specific value to enter Config
		;; Mode
mov	dx,cs:CONFIG_PORT
out	dx,al	;; Write to Config Port twice!
out	dx,al
jmp	$+2	;; Delay
jmp	$+2	;;
pop	dx
pop	ax
ret

EnterConfig endp

;;Exit to I/O Chip Program Configuration Register Mode ExitConfig proc

push ax push dx

mov

mov out pop pop ret

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