[Coco] Dumb OS9 graphics question

[Retro Canada]

i tried that on nitros without covdg and didnt work.

Sent from my iPhone

On 2013-04-04, at 8:00 AM, Robert Gault <robert.gault at att.net> wrote:

> 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/
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> 
> 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
> 
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