[Coco] Strange behavior in MESS

[Steven Flock]

On Wed, Jul 6, 2011 at 7:48 PM, T. Franklin <tim at franklinlabs.com> wrote:

> WOW Did that e-mail get MESSed up (pun intended). Let's clean it up so we
> all can read it. I don't know what happened.
>
> ----------------------------------------------------------------
> Hey all,
>
> Has anyone ever seen this before? I'm writing a game in assemblers using
> MESS to debug. I made a small function to set all the palette registers to
> black (screen blanking). In mess, it seemed the CPU (emulation) was locking
> up. It wasn't. So, I wrote a test program in basic and something strange is
> happening
>
> 10 FOR X=0 TO 15
> 20 POKE &HFFB0+X,0
> 30 NEXT
>
> I run the program and all is well. The screen goes to black. I blindly type
> RGB and everything returns as expected. Run the program again and BLAM!! It
> appears to lock up. But, it's not. You blindly type anything (CLS then
> "Junk" then ENTER). The screen doesn't show anything but the original RUN
> command. Blindly type RGB and the locked up screen goes away and the screen
> with the CLS and "Junk" displays.
>
> Can anyone duplicate this or is it just me?
>

I tried it with two versions of MESS I have installed.

Version 0.104 worked fine. (Screen goes black but emulator still responds as
expected..)
Version 0.136 worked okay the first run. typed RGB and everything was back
to normal. Running the program again seemed to lock up the emulation.