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

[Rogelio Perea]

On Mon Feb 5 2018, David Ladd wrote:

So after some looking at NitrOS-9 L1 it does seem there is a issue with
> VTIO and possible GrfDrv as well.
>
> So far VTIO does not seem to automatically load GrfDrv as it should.  If
> you merge GrfDrv in the OS9Boot file on startup so it is in memory then
> when VTIO tries to call GrfDrv the system locks up.
>
> Graphics display codes that start with $15 to $1F are directed to go
> through GrfDrv.  Which this functionality seems to be currently broken...
>

Thanks for the reply and the tech insight David, will take care of
reporting suspected bugs at the Sourceforge page as noted.


-- RP