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

[alawther@spammenot.mac.com (Anthony Lawther)]

vectorthom <greg.rossiter@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

As others have replied, there are ways of switching to DHGR mode.
However there's no single command and any facility to switch within a
program will be supplied by that program.

Dazzledraw, being a DHGR program does the switching for you. So to
answer your curiosity, if you are using Dazzledraw to view pictures
created in Dazzledraw, then you are seeing them at their best.


Regards,
Anthony.