[stella] Difference between M0 & BL ?!?

[Manuel Polik <cybergoth@xxxxxxxx>]

Hi there!

It's driving me crazy!

I had the perfect radar working with the Ball, when my 
girlfriend suggested using different colors for the 
radar dots. Since this was not possible with the Ball, I 
thought "Easy, just take M0 instead".

Now, this turned me into a nervous wreck over the past 
three hours:

Simply changing RESBL into RESM0 will destroy the 
explosion code of my ships. 

I changed _nothing_ else. No single byte moved, no 
single cycle changed, no variable content altered, 
nothing!

I attached the source. As is, the explosions are fine. 
If you exchange the RESBL in line 256 into RESM0, 
they're scrambled. 

One thing has nothing to do at all with the other, I'm 
not even using missiles anywhere else in the whole 
source.

I don't get it. It seems to be no emulator thing either, 
since Stella & Z26 produce exactly the same result...

Greetings,
	Manuel

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