On 07/03/12 22:03, paul sutton wrote:
Cool, I am sure I have a few books on the speccy and z80 assembler, my spectrum still works (I think) actually composite lead may be useful for the raspberry PI. will have to check, Paul
When I graduated to the speccy, I bought an ex-naval teleprinter for a fiver and wrote a routine that fed a teleprinter adaptor that I had built, with a signal from the cassette port. I seem to remember that I had to provide a switching +-100v signal to give the binary marks and spaces to the printer which ran at an amazing 75 baud (that's bps). I wrote an article for Practical Electronics and received £150 for it! Just amazing how I was able to drive a dinosaur from a (then) state-of-the-art computer. I really enjoyed that exercise - must have been about 1983 or 1984 I guess.
Regards, Barry. -- Barry Drake is a member of the the Ubuntu Advertising team. http://ubuntuadverts.org/ -- [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-uk https://wiki.ubuntu.com/UKTeam/
