[stella] Starfire 2600: Enemy Mine :-)

[Manuel Polik <cybergoth@xxxxxxxx>]

Hi there!

Since I didn't waste any time with VDEL experiments 
today :-) , I managed to add two Tie-Fighters, both able 
to move flawlessly anywhere on the screen, without any 
restriction!

In this current BIN snapshot, both Tie-Fighters can be 
moved with joysticks. No diagonals & only one at the 
time - this is testing code only. (Of course you won't 
be able to control your enemies later in the game :-))

Another good news is, that I managed to give the 
crosshair a color totally independent from all other 
objects onscreen!

So far for the good news, here's the bad one:

There's not a single cycle left in the kernel...

I've some ideas to fire the ships laser without kernel 
cycles, you'll see soon if it worked out or not :-)

With most other things I'm very happy. RAM usage is 
fine, I've currently more than 70 bytes left and I'm 
using some ~800 bytes ROM only.

Greetings,
	Manuel

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