Advantech PCM-9588 user manual Push ax push cx Mov Dx,SMBusPort +04h Al,ch

;AL - Value to write ;Output: none ;============================================================== Ct_I2CWriteByteProcNear

push ax push cx

mov	dx,SMBus_Port +04h
mov	al,ch	;ID cmd(Write)
out	dx,al
call	Delay5ms
call	Delay5ms
call	CT_Chk_SMBus_Ready
pop	ax
mov	dl,03h
out	dx,al	;Index
call	Delay5ms
call	Delay5ms
pop	ax
mov	dl,05
out	dx,al	;Data0
call	Delay5ms
call	Delay5ms
mov	dl,02h
mov	al,48h
out	dx,al	;write data
call	Delay5ms
call	Delay5ms
mov	cx, 100h

@@:

newiodelay loop short @B

call CT_Chk_SMBus_Ready

ret

Ct_I2CWriteByteEndp

CT_Chk_SMBus_ReadyProcNear

mov dx,SMBus_Port + 0;status port

Appendix C Programmable GPIO & Watchdog Timer

87 PCM-9588 User Manual