Andrew Bernhardt writes "Vince Quaresima (CITADEL64, CITADEL-128 and CITADELK2NE) had a C64 program he wrote/sold called COMMLINE64 back in the mid-1980's. It was a 300bps-only system. This is what I ran before I wrote DTJ. It was written in BASIC compiled with Blitz!, and I wrote some assembly code for it to make it more crash resistant. I think I still have the disks I ran it from, but all my C64 equipment seems to have died."