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106 PCM-6890B User Manual
ExitConfig endp
;; Select The I/O Chip Program Configuration Register Logical
Device
;; Input : bl = logical device number
SelectDevice proc
push ax
push dx
mov al,07h ;; Select control register 7
mov dx,cs:CONFIG_PORT
out dx,al ;; Write to Config Port
jmp $+2
mov al,bl ;; Write logical device number
mov dx,cs:DATA_PORT ;; to Data Port
out dx,al
pop dx
pop ax
ret
SelectDevice endp
;; Setting I/O Chip Program Configuration Register Value
;; Input : al = register number
;; ah = setting value