Re: Help me ID this OLD card, please

[Michael Mahon <mahon@cup.hp.com>]

SUPRDAVE wrote:
> 
> i picked up some cards at a hamfest and one two identical ones i cannot
> identify. it's a small card that looks quite old. the circuit board is almost a
> translucent color and doesnt have the quality of apple manufactured boards. it
> says COPYRIGHT 1979 JOHN J BELL, JR MADE IN USA. 79-295
> it has 5 sockets total, and two chips are labeled 8303  SY6522 and there is on
> 74ls05N and a few resistors and capacitors. one of the cards has a 16pin ribbon
> cable soldered to where one of the sockets would be but it doesnt terminate
> into anything. anyone have ideas? i can take a pic of it and email if it will
> help.
> D.B. Young.      Team OS/2!

Sounds like you have a Bell Engineering 6522 VIA card.  It just provides
a 6522 chip on the Apple bus.  Get the specs on the 6522 to use it.

The 6522 contains two 16-bit counter/timers, two parallel ports, and
some
interrupt control logic.  Among other things, you can use it to
implement
a real-time clock (without battery backup, so it must be reset on each
power-up).  Of course, you can also use it to implement one or two
parallel
ports.  ;-)

-- 
-michael

===============================================================
This is my personal opinion, and does not in any way represent
the position of my employer, etc...