Newsgroups: comp.multimedia
Path: utzoo!utgpu!cunews!dgbt!rick.doc.ca!calvin.doc.ca!andrew
From: andrew@calvin.doc.ca (Andrew Patrick)
Subject: Re: DVI questions
Message-ID: <1991Mar1.152725.11896@rick.doc.ca>
Sender: news@rick.doc.ca
Nntp-Posting-Host: calvin.doc.ca
Organization: Communications Research Centre, Ottawa
References: <1252@prlhp1.prl.philips.co.uk> <1991Feb27.222824.6451@rick.doc.ca> <1991Feb28.141127.17012@cbnewsh.att.com>
Date: Fri, 1 Mar 1991 15:27:25 GMT

In article <1991Feb28.141127.17012@cbnewsh.att.com> rkl@cbnewsh.att.com
(kevin.laux) writes:
>In article <1991Feb27.222824.6451@rick.doc.ca>, andrew@calvin.doc.ca 
>(Andrew Patrick) writes:

>> When you install both the capture and delivery boards, you actually
>> plug your VGA monitor into the Capture board, and link the VGA board,
>> Capture board, & Delivery boards together using ribbon cables.  This
>> works fine if you want the DVI playback to be on the VGA screen (you
>> can even overlay your DOS text on the DVI images).
>> 
>> But, how are you supposed to connect a standard NTSC screen and use it
>> for playback of the DVI images?
>> 
>> All you have left is the VGA connector on the Delivery Board and the
>> VGA connector on your VGA card (which is terminated).
>
>	On page 3-2 of the ActionMedia 750 Board Installation Guide, there
>is a discussion about how to connect an analog 60 Hz RGB color monitor that
>can accept TTL sync in NTSC format.  You will need to get a 9 to 15 pin 
>adapter cable (not supplied).  The pinout for the 9 pin side is given in
>Table 3-1.

OK, that part of the manual did not make much sense, but I think I
understand it now (and I think I need a different NTSC monitor).

Are these cables widely available, or am I going to have to go to the
source suggested in the manual?  (It is easier for me to buy it in
Canada if I know what to ask for.)

>	Regarding the VGA connector on the VGA card - in a development
>environment, you will need a monitor connected to it as well as the capture
>board, as most of the DVI production tools need dual screens, one for DVI and
>one for VGA (the monitor connected to the capture board has three basic modes:
>DVI only, VGA with DVI underneath, and VGA only).  In a delivery environment,
>ie. no capture board, a single monitor is connected to the DVI delivery
>board. 

OK, so what I should have is:
- VGA monitor connected to VGA card
- DB15 - DB9 cable connected to Capture Board and NTSC monitor
correct?
 
>If the VGA connector on the VGA card has nothing connected to it,
>ie. it's unterminated, when the system boots, the VGA card will come up as
>monochrome only.  That's why Intel provides the VGA terminator, a hardware
>solution.  But it is *NOT* necessary, because there is a software solution.
>I have a little program that resets the VGA card back to full color operation.
>I may post it here if there is enough interest.

If you don't post it, at least mail it to me.



-- 
Andrew Patrick, Ph.D.       Department of Communications, Ottawa, CANADA
andrew@calvin.doc.CA
                    "The interface IS the program."