[Coco] Modern monitors that work on CoCo 3 and MM/1

[Christopher R. Hawks]

On Wed, 12 Mar 2025 21:24:00 -0600
"L. Curtis Boyle" <curtisboyle at sasktel.net> wrote:

> Found the offsets for both 6809 and 6309 versions of grfdrv for EOU
> 1.0.1:
> 
> Current:
> L086a.25  fdb $0475 (225 line 80 col)
>           fdb $0465 (225 line 40 col)
> 
> Change to: 
> L086a.25  fdb $033d (200 line 80 col)
>           fdb $032d (200 line 40 col)
> 
> (You can ignore the L086a.25 label; that was just for me to find it
> in the output listing easier). On 6309 the offsets are $0754-$0757
> On 6809 the offsets are $07a6-$07a9
> 
> I am pretty sure you know how to run DED already to find and change
> those bytes, and verify the module afterwords. :-)
> 
> 
> On Wed, 12 Mar 2025 21:06:06 -0600
> "L. Curtis Boyle" <curtisboyle at sasktel.net> wrote:
>> 
>> We do actually have a flag in the source that can be set to change it
>> when assembling. But it might be easier/faster to just DED or KWIKZAP
>> /dd/cmds/grfdrv. Are you running the 6809 or the 6309 version of EOU?
>> The offsets to change will be different between the CPU versions.
>> 
>> L. Curtis Boyle
>> curtisboyle at sasktel.net
>> 
[...]
>> 

Thanks Curtis!!

    When I realized EOU used the stock NitrOS9 grfdrv, I just set the
flag, compiled, and replaced the grfdrv in the EOU image.

    PERFECT!!

    Maybe, I'll keep the monitor.

Christopher R. Hawks
HAWKSoft
-- 
Sometimes the smallest things take the most room in your heart.
                     ---Winnie Ther Pooh
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