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From: kaufman@Shasta.STANFORD.EDU (Marc Kaufman)
Newsgroups: comp.sys.mac
Subject: Spectrum card from SuperMac
Message-ID: <2289@Shasta.STANFORD.EDU>
Date: Mon, 30-Nov-87 21:44:45 EST
Article-I.D.: Shasta.2289
Posted: Mon Nov 30 21:44:45 1987
Date-Received: Fri, 4-Dec-87 03:28:24 EST
Reply-To: kaufman@Shasta.stanford.edu (Marc Kaufman)
Organization: Stanford University
Lines: 19

I am looking for some information about the Spectrum video card for the
Mac II.  Not surprisingly, SuperMac, the distributor, can not answer my
questions.  Can one (or more) of you?:

1. The box says that the board operates at 640x480 and 1024x768, changeable
   in software.  None of the demo units I have seen has such a software
   switch.  Is there one?

2. What is the Horizontal Scan rate?  I may want to use my own monitor.
   The box says that several scan rates are provided.  Is this true?

3. Every demo unit I have seen, using the SuperMac monitor, has an annoying
   vertical artifact, consisting of purple lines, when a uniform gray
   background is selected.  This is possibly due to EMI, but it is
   SuperMac's card, SuperMac's monitor, on SuperMac's stand.  Is this
   artifact a product of the monitor, or the board.  If it is the board,
   I don't want one.

Thanks.  Marc Kaufman (kaufman@Shasta.stanford.edu)