Re: Apple IIgs' Super Res Locked Up?

[Rob Greene <nospam-greener@charter.net>]

"Bryan Parkoff" <nospam@nospam.com> wrote in
news:IwJPe.34$m56.20@newssvr24.news.prodigy.net: 

>     I would like to modify pixel data directly on $2000 through $9CFF
>     on 
> bank $E1.  I typed, "C029: C0" to turn on Super Res and "C029:00" to
> turn off Super Res.  I tried either, but it locked up.  The screen
> switches to green and red rows.  I forced to reboot Apple IIgs.
>     Do you have idea why it forbids me from doing $C029?  Do you know
>     if 
> there is routine to turn on/off Super Res?
> 
> Bryan Parkoff

I asked this question a month or two ago - check in the archives for all 
the nitty-gritty details.

As for the C029 switch, you need to OR the bits.  On my ROM 01 GS, the 
lower nibble has (IIRC) a value of 7.  Changing those values is not 
recommended (I got the same thing).

HTH
-Rob