Yeah to be honest.. I'm not sure I'm the biggest serial terminal computer fan. ?I find them way harder to diagnose than computers with video cards. ?But, the SWTPC is an iconic system.. so I'll just keep muddling until I figure it out. Sent from my Samsung device -------- Original message -------- From: Fred Cisin <cisin at xenosoft.com> Date: 2016-08-05 11:25 AM (GMT-08:00) To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: RE: SWTPC 6800 On Fri, 5 Aug 2016, Brad H wrote: If and when you get consistent characters, no matter how wrong, then it's time to look at the bit patterns of what you get V what you expect? (is anybody around who knows?) Since, obviously, if consistent, then it might be right except for one or more bits stuck on or stuck off. Yes, it is frustrating.