Date: Mon, 17 Jul 1995 20:25:42 -0400
From: dj (DJ Delorie)
To: A DOT APPLEYARD AT fs2 DOT mt DOT umist DOT ac DOT uk
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: Re: running with 2 monitors


>   When running with 2 monitors, when calling PC interrupts myself, how do I
> make screen interrupts such as "change mode of the monitor'", "write text to
> the monitor", "clear screen", etc, apply to one monitor or to the other?

You don't.  You have to write to the video memory directly, unless you
switch to mono mode (bios mode 7), in which case you can't write to
the color screen except by writing to the memory directly.

>   (1) Are these mono monitors and cards still being made, or are the sellers
> using up an ever-diminishing old stock?

Hard to say.  Given their usefulness as debugging monitors, I think
someone will always be willing to make them, but the availability is a
lot less than it used to be.

>   (2) Is there any way to use a modern monitor and card as the second monitor,
> and make the PC think that they are mono?

No.  The two cards would have hardware conflicts.

>   (3) Where in the PC do I plug the second card & monitor in?

Any slot.

>   (4) Is there any other way to have two, or even more, monitors on a PC?

Custom video hardware.