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From: jeff@sgi.com (Jeff Mock)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Do the new 8.24 color cards from Apple output to VCRs ?
Message-ID: <1990Aug21.065032.23904@odin.corp.sgi.com>
Date: 21 Aug 90 06:50:32 GMT
References: <9211@ubc-cs.UUCP> <9008210208.AA11080@gnu.AI.MIT.EDU>
Sender: news@odin.corp.sgi.com (Net News)
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Organization: Silicon Graphics, Inc., Mountain View, CA
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>In article <9211@ubc-cs.UUCP> Sundar_Prasad@mtsg.ubc.ca (Sundar) writes:
>>I read in the April 1990 issue of 'Macintosh Aided Design' that the new 
>>8.24 (Picasso) and the accelerated 8.24GC (Monet) video cards from Apple 
>>support interlaced video output to TVs and VCRs. My local Mac dealer seems 
>>to know nothing about this. Can anybody confirm/squash this information ?
>>
>>Sundar_Prasad@mtsg.ubc.ca  <Internet>
>>userffa3@ubcmtsg           <Bitnet>
>>Civil Engineering
>>UBC, Vancouver V6T 1W5
>>CANADA
>
>As far as I know, they do not directly support interlaced video
>output...

I can't speak for the 8.24, but the 8.24GC does support NTSC/PAL.  In fact,
Apple uses a customized version of a Brooktree RAMDAC that does some simple
filtering of adjacent scanlines to make things like 1-pixel horizontal lines 
look better on interlaced monitors.  It's quite a piece of work.  I don't 
believe the GC card encodes RGB into a composite NTSC signal, but it 
does generate good interlaced timing.  I can't remember if it will genlock.

jeff mock
jeff@sgi.com