Vector Imagery

[Chuck Guzis]

On 7/4/2006 at 11:31 AM Jules Richardson wrote:

>In fact, maybe that was another intended use (which never happened) for
>the board that's used to connect a PC to the expansion chassis? (I've
never
>seen or looked at details of one of those boards - but presumably it's
full of 
>generic I/O lines)

That's unlikely--the expansion board set was mostly buffers and receivers
that worked directly off the bus lines.  IBM did offer a Data Acquistiion
board, however.  I just don't think they ever saw a need for generic
parallel I/O, though (and I'm not 100% certain of this), the sample circuit
for the prototype adapter involved driving an 8255.

Cheers,
Chuck