Converting TTL monitor to Analog

From: Richard Erlacher <edick_at_idcomm.com>
Date: Mon May 7 15:45:39 2001

the old CGA monitor is not much other than a TV set. If you modify a TV set it
will work fine with the CGA card. If you expect good quality text, however, you
might want to remove the sound pickoff, as it will reduce the bandwidth to where
the already crummy looking 80 column text is useless. The one thing a VGA isn't
likely to do is sync at NTSC rates, which is what the CGA is designed to do.

I've often wondered what's meant by "TTL" in the context of monitors, since the
EGA monitors have analog-compatible inputs. The only problem with them is the
sync frequency at which they work. VGA monitors certainly aren't TTL. They're
just as analog as can be.

Dick

----- Original Message -----
From: "Cini, Richard" <RCini_at_congressfinancial.com>
To: "'ClassCompList'" <classiccmp_at_classiccmp.org>
Sent: Monday, May 07, 2001 10:05 AM
Subject: Converting TTL monitor to Analog


> Hello, all:
>
> I have an old CGA monitor that's working now, but I can envision it
> someday soon not working. So, I was wondering if anyone has built a
> converter so that they can use a standard VGA monitor (analog) on a CGA
> output (TTL)?
>
> Rich
>
>
Received on Mon May 07 2001 - 15:45:39 BST