Path: utzoo!utgpu!utstat!jarvis.csri.toronto.edu!mailrus!cwjcc!tut.cis.ohio-state.edu!rutgers!att!mtunh!mkd
From: mkd@mtunh.ATT.COM (Mark Darby)
Newsgroups: comp.sys.amiga
Subject: Re: Serial Ports
Message-ID: <646@mtunh.ATT.COM>
Date: 8 Feb 89 17:34:26 GMT
References: <171@algedi.UUCP> <4092@omepd.UUCP> <433@madnix.UUCP> <450@madnix.UUCP>
Organization: AT&T ISL Middletown NJ USA
Lines: 33

In article <450@madnix.UUCP>, perry@madnix.UUCP (Perry Kivolowitz) writes:
> In article <645@mtunh.ATT.COM> mkd@mtunh.ATT.COM (Mark Darby) writes:
> >
  [Question regarding whether the multi-serialport implementation works with
   an Amiga 500 and an expansion cage...]
> >such as Bills' Board, Expansion Technologies' Tool Box (an A2000 2 slot
> >expansion cage), or Pacific Peripherals' SubSystem 500?
> >Mark K. Darby
> 
> I have no idea. There's nothing special about the requirement of our Twin-X
> board. It uses a completely standard  Zorro  II bus interface and has never
> shown caused  a  problem in  any  of the systems we've tried out at all the

Then I suppose my question should be stated as such:

The Zorro II bus interface is a 100-pin interface while the expansion connector
for the A500 is 86-pin(correct me if I am wrong). Does the twin-x board
use any one the bus lines available in the zorroII(i.e. A2000) bus interface
which may not be (is not) available on the A500? Have you ever tested your
boards on any A500 based equipment? It's not totally unreasonable to expect
that A500 owners want at least some limited expansion capability. I expect
that an A500 user who wants expansion capability would only
want it to support one or two particular applications as opposed to
having multiple ( >2 ) applications like that possible with the A2000's
internal expansion bus and slots. 

It's great that you are first out on the market with this capability.
I just hope you haven't ignored the A500 owners in doing so. ;-)

Mark K. Darby
AT&T Bell Laboratories                       AT&T: (201)957-2706
200 Laurel Ave.                              uucp:..!att!mtunh!mkd
Middletown, NJ 07748