On 2/10/2015 11:48 PM, Stephen H. Fischer wrote: > Hats off to SockMaster for figuring out how to do what the 6551 ACIA should do. Time better spent building a time travel machine to go forward in time to purchase working ACIAs. The +4 did similar, routing CTS to gnd and implementing the "cassette port" piece on a TPI (think PIA) IO pin. JIm