[Coco] Strange behavior in MESS

[Robert Gault]

T. Franklin wrote:
> Ahhh!!!
>
> Thanks! You verified it's not me. I'm running version 0.129. It seems they made a change in the screen refresh routine (or something along those lines) that maybe causing the problem. I would love to use VCC but to my knowledge, it doesn't have a debugger.
>
> Thanks for the help.
>
> -Pilot
>
>

Pilot,

As you have found, it is important to indicate which version of an emulator is 
being used when making bug reports. It is also important to indicate the 
condition of emulation such as if a Coco3, which screen mode is active.

As to your program, I think you have come to the wrong conclusion. There is a 
problem with recent versions of MESS but the emulation does not lock up.
Try the same program but change the value POKEd into the palette registers. I 
think you will find that for values other than zero, the program will work as 
intended. That points to failure on the unique condition of zero but not a 
generic failure. Without further testing, you can't tell anything more than  the 
program does not work as expected on some versions of MESS.