Path: utzoo!attcan!uunet!tut.cis.ohio-state.edu!usenet.ins.cwru.edu!mephisto!ncsuvx!news
From: rnf@shumv1.uucp (Rick Fincher)
Newsgroups: comp.sys.apple
Subject: Re: //gs screen resolutions...
Message-ID: <1990Feb21.143010.18539@ncsuvx.ncsu.edu>
Date: 21 Feb 90 14:30:10 GMT
References: <2483@ttardis.UUCP>
Reply-To: rnf@shumv1.ncsu.edu (Rick Fincher)
Organization: NCSU Computing Center
Lines: 37

In article <2483@ttardis.UUCP> rlw@ttardis.UUCP (Ron Wilson) writes:

>
>The last prices I got from an Apple authorized dealeron the IIgs and the
>Apple Video Overlay Card where both about $1000.  I don't know what other
>prices might be obtained through mail order, but, given this price on the
>V.O.C., I agree that it is over priced.

I think the retail is around $550 for the VOC, I thin I paid about $460
from Roger Coats (800) 438-2883.

>
>As for the complexity of the card, I was not able to actually look at it or
>a picture or a logic diagram; HOWEVER, back in 83, I built my own video
>overlay card using the TI-9918A video chip - the one TI used in their 99/4A
>computer.  My card was only 5 chips plus 8 DRAMs, for a total of 13 chips.
>The TI video chip did all the hard work (I bought it for about $40) - the
>other 4 chips where TV components: a 14.3 MHz VCO (voltage controled
>oscillator), a phase-locked-loop detector chip, a TV sync generator (basically
>a frequency divider), and a quad op amp to sepperate the external composite
>video into vertical and horizontal sync, and buffer the video in and out
>conections.  My total outlay to build the board: about $100.
>
>I also built a box to slave sync a modified video camera to another source
>of video and do split screens between the camera and the other video source.
>Again, about $100 for me to build.
>

Gee, you ought to market both of those!  Either that or write an article for
Computer Shopper or Incider with directions on how to build it.  If you liked
it so will thousands of others.  I guess the Apple card has to be a little 
more complex because t genlocks RGB and NTSC for the GS.

>Given my experience, I would think that Apple's V.O.C. should cost no more
>than $300.
>
>- Ron Wilson