I would like some advice about the best way to generate custom SIO commands on the bus..ie., device/command/parm1/parm2/checksum. I was thinking that XIO could be used, but I am not really sure about that. I guess I could go find the actual IOCB and fill it out, but can I do that and JSR to some routine without messing things up? The basic thing I want to do is to be able to send custom SIO commands to arbitrary devices. Just looking for advice on the best way to approach. I am using cc65.