Aaeon AEC-VS01, Manual

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E m b e d d e d C o n t r o l l e r A E C - V S 0 1
Appendix C Digital I/O C-6
call Delay5ms
mov dx, 04h ; Transmit Slave Address
Register
inc ch ; Set the slave address and
mov al, ch ; prepare for a READ command
out dx, al
mov dx, 03h ; Host Command Register
mov al, cl ; offset to read
out dx, al
mov dx, 05h
xor al, al ; Clear old data
out dx, al
mov dx, 02h ; Host Control Reegister
mov al, 48h ; Start a byte access
out dx, al
call CT_Chk_SMBus_Ready
mov dx, 05h
in al, dx
ret