[Coco] Dumb OS9 graphics question

[Robert Gault]

Bill Pierce wrote:
>
> Hi guys,
> Am I right in assuming that you MUST have the CoVDG (vdgint) to run a Pmode4 screen in OS-9?
>
> Bill Pierce
> My Music from the Tandy/Radio Shack Color Computer 2 & 3
> https://sites.google.com/site/dabarnstudio/
> Co-Webmaster of The TRS-80 Color Computer Archive
> http://www.colorcomputerarchive.com/
> Co-Contributor, Co-Editor for CocoPedia
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> E-Mail: ooogalapasooo at aol.com
>

Unless you want to hijack the entire OS-9 system and possibly require a reboot 
after ending your program, hardware manipulation is best left to OS-9 itself. 
That means you should use CoVDG for working with Pmode type screens.

However that does not require you to have vdg type descriptors in OS9Boot. You 
can easily change /Wn descriptors to use vdg text and graphics before the first 
use of the screen.

xmode /wn par=1 pag=10
where n = the window number