[Coco] Graphics on NitrOS9 Level 1 v3.3.0 (CoCo 1)

[Wayne Campbell]

I may be wrong, but 12 is the clear screen code under level 2. Is it
different under level 1, or with graphics screens?

Wayne


On Feb 3, 2018 3:39 PM, "Rogelio Perea" <os9dude at gmail.com> wrote:

> Took me a while to re-gain speed on my CoCo doings but here it goes.
>
> Following Curtis's idea of sending the GFX commands from the shell I wrote
> the following routine:
>
> display 0F 00 05
> display 13
> display 7
> display 15 80 60
> display 7
> display 1A 14
> display 7
> display 12
>
> Entered each DISPLAY command as a separate line for clarity, the 7 codes in
> there just to provide an audio cue of each stage of the graphics commands
> executing.
>
> DISPLAY 0F sets the 256x192 mode, buff on black color ser - per OS9L1v2
> Addendum, command is run by CCIO, GRFO not needed
> DISPLAY 13 clears the screen, run by CCIO
> DISPLAY 15 sets the graphics cursor to dec 128,96 (center or screen), run
> by CCIO
> DISPLAY 1A draws a circle (buff) at graphics cursor location with a radius
> of dec 20 - run by GRFO
> DISPLAY 12 ends graphics and returns the memory to OS9
>
> This routine bombed with NitrOS9 Level 1 v3.2.8 (6809), I get the first two
> beeps confirming the Graphics Mode is set and the screen cleared with the
> graphics cursor set at the center, but upon the CIRCLE (1A) command the
> system hangs and only a hard reset will return control of it. Routine run
> perfectly fine under stock OS9 Level 1 v2
>
> What follows next is above my paycheck level, but from the little I can
> gather is that there is a bug in NitrOS9 Level 1 - my shenanigans with GFX
> under BASIC09 seem to stem from something not correctly ported over from
> stock OS9 L1 into NitrOS9 L1.
>
> Again, OS9 L1 v2 split some of the graphics functions in CCIO into a module
> named GRFO; there is no GRFO module under NitrOS9 L1 but there is a GRFDRV
> in there... I wonder if that's the one not being called upon properly...
> just guessing here.
>
> My bet is that if this gets fixed, the GFX problem reported earlier under
> Basic09 will get squished as well :-)
>
>
> -- RP
>
>
> On Fri Dec 29, 2017 at 6:07 PM, L. Curtis Boyle wrote:
> >
> > Rogelio, can you try “manually” outputting the display string for the
> >> graphics commands you are trying, just to see if it is the graphics
> >> handling in Level 1 itself that is not working, vs just the GFX module?
> >>
> >
>
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