Robert Smits wrote: > 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. > I got into packet radio with an XT clone and a Heathkit HK-232, the kit version of the AEA PK-232. I'm VE3ZU.
-- Use OpenOffice.org <http://www.openoffice.org> -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
