Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!cbmvax!hood
From: hood@cbmvax.commodore.com (Scott Hood)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: 2320 on an A500 and external drive port hardware interfacing
Message-ID: <16697@cbmvax.commodore.com>
Date: 20 Dec 90 17:29:33 GMT
References: <9012120327.AA16486@yoda.eecs.wsu.edu> <49649@cornell.UUCP> <1990Dec20.082254.16766@agate.berkeley.edu>
Reply-To: hood@cbmvax.commodore.com (Scott Hood)
Organization: Commodore, West Chester, PA
Lines: 41

In article <1990Dec20.082254.16766@agate.berkeley.edu> vincelee@tornado.Berkeley.EDU (Vincent H. Lee) writes:
>In article <49649@cornell.UUCP> johnhlee@cs.cornell.edu (John H. Lee) writes:
>>In article <9012120327.AA16486@yoda.eecs.wsu.edu> gheller@YODA.EECS.WSU.EDU (Geoffrey Heller - CS216) writes:
>>>Hello C= and other hardware hackers out there!  Here are a few questions
>>>which have been puzzling me for some time...
>>>
>>>Question #1:
>>>  I have an A500 with Trumpcard 500 on it.  I am very interested in the
>>>2320 graphics board but I'm told it is only available for the A2000.  Now,
>>>I do have a bit of experience at hardware hacking and I would like to know
>>>if it would be easy to add a 2320 onto my A500 bus.  If not, would anyone
>>
>>In theory, I believe it's possible.  In practice, I doubt it.  Either way,
>>it's definately not easy.  The 2320 hangs off the video slot and picks
>>signals off the video subsystem, not the system bus.
>
>Don't listen to my brother.
>I'm planning the same modification.  Issue 1.5 of AmigoTimes showed how to
>connect a MicroWay Flickerfixer to a 500.  My guess is that connecting a
>2320 should be similar, but I will have to see if it needs any additional
>signals.
>
>The flickerfixer just needed the 12 digital color signals (available on
>buffer chips U40 and U41), horizontal and vertical sync (RP 403), a
>clock signal (RP103), +5, and ground.  The 2320's mileage may vary.
>
>>	John Lee		Internet: johnhlee@cs.cornell.edu
>>The above opinions of those of the user, and not of this machine.
>
>-Vince Lee

Add Csync to that list as well and that should be it!

Have fun and Happy Holidays,
Scott Hood

-- 
--
Scott Hood, Hardware Design Engineer (A3000 Crew),  Commodore-Amiga, Inc.
   {uunet|pyramid|rutgers}!cbmvax!hood   hood@cbmvax.cbm.commodore.com
  "The views expressed here are not necessarily those of my employer!"