User’s Manual
Custom Embedded Solutions
WIN Enterprises, Inc. [email protected] www-win-ent.com (978)688-2000
77
MOV AL, 07H
OUT DX, AL
;O 2E 07
MOV DX, 2FH
MOV AL, 09H
OUT DX, AL
;O 2F 09 (select logic device 9)
;-------------------------------------------------------------------------------------
; Read CRF1 and set bit 1= 0, bit 0= 1 to enable bypass circuit
;-------------------------------------------------------------------------------------
MOV DX, 2EH
MOV AL, 0F1H
OUT DX, AL
;O 2E F1
MOV DX, 2FH
IN AL, DX
;read F1
AND AL, 0FCH
;mask bit 1, bit 0
OR AL, 01H
;set bit 1= 0, bit 0= 1
OUT DX, AL
;send value
;----------------------------------------------------------------------------------------
; Exit extended function mode
;----------------------------------------------------------------------------------------
MOV DX, 2EH
MOV AL, 0AAH
OUT DX, AL
;close super IO
Segment 2: Control by CRF1 bit 3 & 2
Bypass disabled when power off
;---------------------------------------------------------------------------------
;Enter the extended function mode, interruptible double-write
;---------------------------------------------------------------------------------
MOV DX, 87H
;address
MOV AL, 2EH
;Index
OUT DX, AL
;enter super IO
OUT DX, AL
;enter super IO
;---------------------------------------------------------------------------------
; Configure logical device 9
;---------------------------------------------------------------------------------
