Xref: utzoo comp.sys.amiga:17599 comp.graphics:2251
Path: utzoo!mnetor!uunet!husc6!cmcl2!nrl-cmf!ames!oliveb!sun!pepper!cmcmanis
From: cmcmanis%pepper@Sun.COM (Chuck McManis)
Newsgroups: comp.sys.amiga,comp.graphics
Subject: Re: How to get video signal from MacII?
Message-ID: <49398@sun.uucp>
Date: 13 Apr 88 18:18:32 GMT
References: <1022@luth.luth.se> <5683@well.UUCP> <4366@husc6.harvard.edu>
Sender: news@sun.uucp
Reply-To: cmcmanis@sun.UUCP (Chuck McManis)
Organization: Sun Microsystems, Mountain View
Lines: 17
Keywords: video, macII, VHS

In article <4366@husc6.harvard.edu> olson@endor.UUCP (Eric K. Olson) writes:
->Getting a Mac II to output interlaced at NTSC frame rates is purely a 
->software problem; I have sent source in C and a Pascal-like language and
->a binary to the person who asked originally.  The output is still RGB
->(or G only + control panel set to b&w == b&w composite), so you'll need
->something to convert RGB to Composite Color.

Eric, not to besmirch your code or anything, but you apparently didn't
catch on that generating the correct sync signals is about 1 tenth the
battle. (maybe 20%) The big problem is generating the 3.58Mhz subcarrier
on the composite signal and phase locking it to an RGB -> NTSC color signal.
That is the tough stuff. And that is what costs extra money on the Mac II.


--Chuck McManis
uucp: {anywhere}!sun!cmcmanis   BIX: cmcmanis  ARPAnet: cmcmanis@sun.com
These opinions are my own and no one elses, but you knew that didn't you.