From: utukuri@ecf.toronto.edu (UTUKURI  AVANINDRA)
Subject: Re: TECH: LCD Screens
Organization: University of Toronto, Engineering Computing Facility

>I used a Casio TV570 which has a composite video in jack...converting
>VGA to composite video isn't too much of a problem if you buy an off
>the shelf PC-to-VCR type box. Infact, one of the one's I've seen over
>here is less than $200 and is actually a card that looks like a VGA
>card to the PC, but has a composite output. You'll lose quality, and
>it may flicer a bit, but you'll get a cheap HMD!

Actually, has anyone tried converting the VGA signal into NTSC via a
simple RF modulator?  I know that the old Commodore 64, Atari ST, and
even some of the Amigas used a simple RF modulator box to convert the
input of RGB into an NTSC signal.  Has anyone tried this?  How good is
the quality?  How many colors and resolution can I get via this
method?  Anyone have any specs on the pins for a RF modulator box?

>I tried reverse engineering that Casio TV screens to try and obtain
>RGB, but didn't get very far. On the models I have, there seems to be
>a lot of logic actually on the screen PCB, and my guess is that the
>PAL/NTSC signal is converted not into RGB directly, but into a
>proprietary signal that can directly drive the LCD controllers...I may
>be COMPLETELY wrong, however...

Actually, I was ablt to contact SEGA's service line, and talk to a
technician.  He is under the assumption that the LCD screen runs of
straight forward RGB analogue signal, and not a proprietary signal.  I
know that the CASIO TVs use a proprietary signal, as their technicians
said that they werent allowed to release any specs on the device.
But, I am under the assumption that SEGA would not use any special
method, as they are not in the LCD screen or driver circuitry
industry.  I would assume that they would use just existing methods
and technology.  I could also be completely wrong.

av