RS-232 Summagraphics to Mac 512 or ADB

Article View: comp.sys.mac

Article #35629

#35629

From: Brian Holt
Date: Mon, 19 Dec 1988 19:06

27 lines
1380 bytes

I am trying to get information on hooking up an old
Summagraphics Bitpad to an old Mac.  In particular,
the Summa is compatible with their "Bitpad One" and
the Mac can be considered a 512KE (actually it
started life as a 128...).  This mac does not use
the Apple Desktop Bus for its mouse.

Does anyone have the pinouts and protocol for the
old mouse port?

If this is an impossible venture, does anyone have
any hints on attaching the RS232 Bitpad to an
Apple desktop bus?

Summagraphics says they don't want to hear about
it, and to just spend the $800 or so on a new
bitpad designed for the Mac...

		=brian
P.S.  Please reply by MAIL to brian@apollo.com,
since I don't read this newsgroup.  Thanks.

-- 
Internet: brian@apollo.COM            UUCP: {decvax,mit-erl,yale}!apollo!brian
NETel:    Apollo: 508-256-6600 x5694         Home: 617-332-3073    
USPS:     Apollo Computer, Chelmsford MA     Home: 29 Trowbridge St. Newton MA
(Copyright 1988 by author. All rights reserved.  Free redistribution allowed.)

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!ulowell!apollo!brian
From: brian@apollo.COM (Brian Holt)
Newsgroups: comp.sys.mac
Subject: RS-232 Summagraphics to Mac 512 or ADB
Message-ID: <405a709d.18e92@apollo.COM>
Date: 19 Dec 88 19:06:00 GMT
Organization: Apollo Computer, Chelmsford, MA
Lines: 27