Why do people keep stealing my work :(

[Don Y]

der Mouse wrote:
>> [IIRC, the vector engine in Tempest was pretty much "fully disclosed"
>> in their documentation -- this wasn't the case in all machines
>> (though Atari used LOTS of "custom chips" in their machines)]
> 
> I don't know where, but it was fully enough disclosed for MAME to
> emulate it.
> 
> What *I* would like to understand better is the mathbox.  MAME's
> emulation is good enough for the game, but the operations are intricate
> enough that it's hard to see what they add up to just from reading the
> emulator implementation.  (For example, there's something that I
> suspect is some kind of perspective transformation, but I haven't been
> able to figure out enough details to label it any better than "black
> box that might be perspective transformation".)

You might be better off looking at how the mathbox was used in
Battlezone...