Acrosser AR-B9622 - Manual (Page 39)

AR-B9622 User¡¦ s Guide
5-5
(2) Lock Configuration Register
mov al, 013h
out 22h, al
nop
nop
mov al, 000h
out 23h, al
nop
nop
(3) Read the Value at Configuration Register
For example, read INDEX 3Ch:
Unlock configuration register
mov al, 03ch
out 22h, al
nop
nop
in al, 23h
nop
nop
push ax
Lock configuration register
pop ax ; AL - result
(4) Write Data to Configuration Register
For example, write 0FFh to INDEX 3Bh:
Unlock configuration register
mov al, 03bh
out 22h, al
nop
nop
mov al, 0ffh
out 23h, al
nop
nop
Lock configuration register