Path: utzoo!mnetor!uunet!portal!cup.portal.com!Fabian_Fabe_Ramirez
From: Fabian_Fabe_Ramirez@cup.portal.com
Newsgroups: comp.sys.mac
Subject: Re: Spectrum card from SuperMac
Message-ID: <1893@cup.portal.com>
Date: 10 Dec 87 03:04:41 GMT
References: <2289@Shasta.STANFORD.EDU>
Organization: The Portal System (TM)
Lines: 35
XPortal-User-Id: 1.1001.2649


Marc,

Greeting, I'm with SuperMac Technical Support and here are some answers that I
hope will satisfy your questions.

1. Well, both the packaging and literature state that the Spectrum video card
   will support multiple resolutions.  This feature will be available in the
   next release of the firmware (as well as NTSC).  For those that do _not_
   have the Spectrum B11 ROM, please contact your dealer and make arrangements
   for an exchange with SuperMac.

2. The Horizontal Frequency is 48.190 KHz
   The Vertical Frequency   is 59.28  Hz
   The Pixel Clock          is 64.000 MHz

3. Any "verical artifact" is probably a result of Convergence which has not
   been properly adjusted.  There is a convergence test that the "user" can

   use by selecting the Monitor cdev from the Control Panel and then using the
   V-Stat (Vertical Static Convergence Control), H-Stat (Horizontal Static
   Convergence Control), and the V-Cent (Vertical Centering Control).  Once
   done, the convergence will be properly adjusted.  If not, contact your
   dealer for proper adjustments.

   Also, any "Moiree" pattern can be eliminated by using Apple's new System 4.2
General cdev which allow you to change the color of your desktop pattern.

I hope that this answers you questions.  I'm suprised by your comment that
SuperMac couldn't give you any answers.  Could you send me E-Mail and let me
know who you spoke to and when you called.  I'd be more than happy to check
this out.

Fabian Ramirez                          fabian_fabe_ramirez@cup.portal.com
SuperMac Technical Support              sun!cup.portal.com!fabian_fabe_ramirez
(415) 964-9660