Re: unknown card

Don Bruder wrote:
In article <1heqhaj.nuklud5pfx42N%bieling@xxxxxxxx>,
bieling@xxxxxxxx (Jorge Chamorro Bieling) wrote:


Don Bruder <dakidd@xxxxxxxxx> wrote:


What I'd *REALLY* like to find is a card that would fits in a slot and
has the slot signals broken out to a breadboard. Particularly since my
robotics gizmo is currently built on two small breadboards, and it would
just be a matter of adding a handful of wires and writing some code to
accomplish what I'm wanting to do.

Something like a "extend-a-slot" ?


No - More like a "blank experimenter card" type thing, only with a breadboard on it.


How many output bits do you need ?


6 minimum, 8, maybe 10, would be even better.


How many input bits ?


0 *NEEDED*, but I'd probably manage to find a way to use them if they were available :)

You need a prototype card plus a 6522 chip. That will give you 16
bits of digital input/output, fully handshaked, serial I/O, 2 counter/
timers, and full interrupt logic.

A hex Schmitt trigger (two sections needed, 4 more for your uses) and
a capacitor will condition the Apple PH 2 signal to be like PH 0 for
the 6522, and you're off and running.

-michael

Music synthesis for 8-bit Apple II's!
Home page: http://members.aol.com/MJMahon/

"The wastebasket is our most important design
tool--and it is seriously underused."
.

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