AAEON GENE-U15B - Manual (Page 58)

S u b C o m p a c t B o a r d G E N E - U 1 5 B
Appendix D DIO D-7
xchg ah, al
mov dx, 500h + 00h ; Host Control Register
xor al, al ; Clear previous commands
out dx, al
call Delay5ms
mov dx, 500h + 04h ; Transmit Slave
Address Register
mov al, ch ; Set the slave address and
out dx, al ; prepare for a WRITE
command
mov dx, 500h + 05h ; Host Command
Register
mov al, cl ; offset to write
out dx, al
mov dx, 500h + 06h
mov al, ah
out dx, al
mov dx, 500h + 01h ; Host Status Register
mov al, 07h ; Clear all status bits
out dx, al