AAEON PCM-QM77 - Manual (Page 169)

C o m p a c t B o a r d P C M - Q M 7 7
Appendix E Digital I/O F-6
call Delay5ms
mov dx, 0f040h + 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, 0f040h + 03h ; Host Command Register
mov al, cl ; offset to read
out dx, al
mov dx, 0f040h + 05h
xor al, al ; Clear old data
out dx, al
mov dx, 0f040h + 02h ; Host Control Reegister
mov al, 48h ; Start a byte access
out dx, al
call CT_Chk_SMBus_Ready
mov dx, 0f040h + 05h
in al, dx
ret