On Thursday 09 August 2007 18:52, James Knott wrote: > Robert Smits wrote: > > On Wednesday 08 August 2007 19:08, James Knott wrote: > >> Incidentally, many years ago, I bought a huge Cherry keyboard, without > >> any encoder logic. I designed & built my own encoder and used that > >> keyboard with my IMSAI 8080. > > > > Had one of those. Mine came with the optional 4K memory, and I entered > > programs in with toggle switches I Byte at a time. In 1976 I got cassete > > tape drives, and then 8 inch floppy drives (1.2 MB each). Don't miss CP/M > > all that much, though. > > Mine didn't come with any memory. I bought a 16K board, loaded with 4K > from another vendor. My system eventually reached 20K. I also used > cassettes with it, but never graduated to floppies. I eventually > connected it to my ham radio gear, a modem and also a Model 35 ASR > Teletype. I designed and built an 8 port serial I/O card for it (only > installed 4 UARTs) and in the process found a bug in the 8250A UART chip > that National Semiconductor didn't know about. I also wrote a lot of my > own software, though I bought an editor, monitor, assembler and BASIC > (Scelbal) from Scelbi. I did a lot of learning with that box. Had a > lot of fun with it too. It's hard to believe I bought it almost 31 > years ago!
I used mine for connecting to usenet via ubc, and then as my packet radio terminal when we used V3 protocol before AX25. I'm VE7HS. -- Bob Smits [EMAIL PROTECTED] -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
