Re: GS/OS basics...

[Jeff Blakeney <CUTjblakeney@sympatico.ca>]

On 25 May 2005 10:54:00 -0700, "Rob Greene" <RobGreene@gmail.com>
wrote:

>BTW, what is the "Alternate Display Mode" that shows up in the IIGS
>control panel?  As I remember, it can be turned on or off which doesn't
>explain too much.

The IIgs, by default, does not shadow the area for text page 2
($800-$BFF) from bank $00 to bank $E0.  I think it was done to speed
up the memory shadowing because very few programs ever used text page
2.  If you turn on Alternate Display Mode then text page 2 will get
shadowed but your machine will run a little slower.

There are a few programs that do require text page 2 so if you run a
program and get a text screen filled with "2" then you most likely
need to turn on the Alternate Display Mode for that program to work.

-- 
 Jeff Blakeney - Dean of the Apple II University in the
                 Apple II Community on Syndicomm.com
 CUT the obvious from my address if you want to e-mail me