Re: Switching to Double Hi-Res (DHGR) within a program

[Bill Buckels <bbuckels@escape.ca>]

On Oct 25, 2:34 pm, vectorthom <greg.rossi...@gmail.com> wrote:
> Hello all,
>
> I'm trying to learn how to use Double Hi-Res graphics on the Apple
> II.  I've recently acquired an Apple IIe to replace one my family sold
> years ago and am reliving my '80s childhood through old floppy disks
> that I still have on-hand.  I don't remember even knowing about double
> hi-res graphics back then, but I'd like to start experimenting with it
> now.  I have Broderbund's Dazzledraw (a DHGR program) and a bunch of
> homemade drawings saved to disk.  I have a Rev. B Apple IIe and an 80
> col/64k expansion card, so I believe I have the machine capability to
> display DHGR.  At the prompt, I know that entering "PR#3" will switch
> me to 80 column mode, where all the text gets visibly thinner.  Is
> this essentially DHGR mode or is there more to it than that?
>
> My main question however is this:  how do I switch to DHGR mode once
> I'm within a program?  As said, I can switch to 80 column mode when
> I'm at the prompt, but when I reboot to start loading Dazzledraw for
> example, it hops back to 40 column mode.  I don't see a way to switch
> back from within the program.  I'm curious to know if I'm viewing my
> created images at their best or if they would look better in 80 column
> mode. Is there a relatively easy way to toggle back and forth between
> video modes?
>
> Thanks,
> Greg R

You may enjoy reading this page...

http://www.appleoldies.ca/azgraphics33/index.htm

There are some conversion utilities and stuff here as well... this may
not answer your questions and may create more questions...

Bill