Re: Question about parallel card.

[dempson@actrix.gen.nz (David Empson)]

Neil Parker <nparker@inferno.uoregon.edu> wrote:

> In article <1998031821103001.QAA04706@ladder03.news.aol.com>,
> BabarStCyr <babarstcyr@aol.com> wrote:
> >Hi
> >
> >Are old parallel cards able to send AND receive datas?
> >In others words can I do a LDA $CXXX to GET a byte?
> >Are they any "standard" programming address for this type of cards?
> 
> I recently saw the manual for the Apple Parallel Interface Card (the newer
> version, that has both Apple and Centronics modes), and it seems to indicate
> that the card can receive data.  I don't actually have a card to test it
> with, alas.

This card has separate pins for 8-bit input and output.  It only has
automatic handshaking in the output direction.  The input side is mostly
intended for getting printer status signals back into the computer.

-- 
David Empson
dempson@actrix.gen.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand