Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!decwrl!labrea!rutgers!uwvax!astroatc!nicmad!madnix!perry
From: perry@madnix.UUCP (Perry Kivolowitz)
Newsgroups: comp.sys.amiga
Subject: Re: Serial Ports
Message-ID: <480@madnix.UUCP>
Date: 10 Feb 89 03:26:00 GMT
References: <171@algedi.UUCP> <4092@omepd.UUCP> <433@madnix.UUCP> <450@madnix.UUCP> <646@mtunh.ATT.COM>
Reply-To: perry@madnix.UUCP (Perry Kivolowitz)
Organization: ASDG Incorporated
Lines: 43

In article <646@mtunh.ATT.COM> mkd@mtunh.ATT.COM (Mark Darby) writes:
>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

Fair questions.

The A1000 and the A500 *both* have 86 pin expansion ports. The purpose of
the Zorro glue logic is  to  do what's necessary to make the 86 pins talk
on 100 pins. This necessarily includes the synthesis of some new signals.
As I said, that's part of the job of the Zorro glue.

In fact, the A2000 passes an 86 pin configuration through the CPU slot
after which, zorro glue turns it into the 100 pin standard.

I can assure you, though, that some of the Zorro II boxes for the A500 
will do a better job than others. Not that I have any information in this
area, but I've been around too long in the Amiga hardware market to expect
that every vendor will have done *all* their homework.

As for Twin-X. We routinely test *all* of our A2000 products on A2000's,
A500's, and A1000's. On the A1000 and A500 we use a full Zorro Mini-Rack-D
A1000 card rack with its sides hack-sawed off. 

Which leads me to the following: 

We're clearing out our A1000 inventory: While supplies last:

2M or 8M (was $399 and $499) are each $250.
Mini-Rack-C (was $195) now $100.
Mini-Rack-D (was $325) now $200.

Thanks

Perry

-- 
                        Perry Kivolowitz, ASDG Inc.
ARPA: madnix!perry@cs.wisc.edu   {uunet|ncoast}!marque!
UUCP: {harvard|rutgers|ucbvax}!uwvax!astroatc!nicmad!madnix!perry
CIS:  76004,1765 (what was that about ``giggling teenagers''?)