p-port alternative 8255PPI

Jerry,

No extra pins, but the modern EPP and ECP versions of the p-port
definitely add "programmability" to the equation... Jon E is using
this functionality in his PPMC project.

I don't know about an 8255 on a pcmcia card. Is this what you meant?
Or were you asking about an 8255 card for the PCI bus? I'll try to
look at my I/O "superstore" catalogs...

Hope this helps.

Ballendo

--- In CAD_CAM_EDM_DRO@y..., "Carol & Jerry Jankura"
<jerry.jankura@s...> wrote:

> |Last question first: No, we only get 17 useful pins from an IBM p-
> |port. IBM did not use the "then standard in Z80 computers" 8255PPI
> |(Programmable Peripheral Interface) chip in the design of the PC.
>
> Ok, that says a lot about what we can expect to see with today's

PC's -

> nothing programmable and no extra pins.

<snip>

> |There are also SCADS of 8255 based I/O cards available ready made.
> |Many support more than 24 pins of I/O by using multiple 8255's.
>
> Now, are there any PCMCIA cards that use this port? I know that Dave
> Goodfellow mentioned a source for a parallel PC-Card, but I'm

guessing that

> this is a printer card rather than a "true" parallel port card.
>