4 Dec
2008
4 Dec
'08
11:59 a.m.
On 4 Dec 2008 at 14:14, Roy J. Tellason wrote:
I've had idle thoughts from time to time about
building one of those and
sticking an EPROM between the outputs of that circuit and the device to be
driven, to convert the scan codes that you get to ASCII or whatever. Maybe
one of these days I'll get that particular round tuit. :-)
Why bother? AVRs and PICs are cheap and easy to work with (in
particular, an AVR with SPI can be programmed with little more than a
parallel port and a handful of resistors). Code for handling AT-
style keyboards abounds. One DIP--that's all that it takes.
I can see the motivation to do something "the vintage way", but even
the 5170 uses a uC to interface to the keyboard. If you wanted to go
"vintage', an 8048 or 8051-family uC would do the trick.
Cheers,
Chuck