"Which serial modes are you using"
I am using the HSERIN and HSEROUT commands. I haven't actually tested it yet because I've been working on RTS and CTS. Do I need to use SERIN and SEROUT with the inverted modes like you suggested? Again I haven't tested any of this yet.

The RTS and CTS appear to be correctly oriented, so I don't think I need to change that.

Thanks.

-Mike