J.P.D. Kooij wrote:
>
> Hi,
>
> Does anyone have any experience reusing old 8250 serial cards? They're
> real cheap - if costing anything at all - at second hand pc-shops.
>
> Maybe (probably) you'd have to cut some traces on the board. That
> shouldn't be much of a problem, because the 8250 boards are mostly oldies,
> so they're often not multi(>2)layered.
>
> Another option would be to plug your own pcb with a PIC into the uart's
> socket.
>
> I haven't tried any of this myself yet, but I'd love to hear if there are
> people who have had good experiences with hardware hacks like this.
>
> Cheers,

I cannot say I'm an expert, but I have used the above technique in a
simple A/D converter project.  I simple removed the UART and pulled the
parallel lines out to a small protoboard.  I got the information from a
Radio Electronics (I think) article called 'QUADI - Quick And Dirty
Interface' from about 3-5 years ago. Sorry I don't know the date, but
the idea worked, and the board was almost free.  Easy access to the port
from  simple basic as well.

--
Daniel Holt - Genetronics Inc.
dholt@genetronics.com
http://www.genetronics.com
http://rohan.sdsu.edu/home/holt/index.html