Re: Atarti emulator for Apple II?

[kellihanb@aol.comDelete (KellihanB)]

>Jeffrey Theusch wrote:
>
>> I know this is a long shot, but are there any Atari emulators for the
>> Apple II?  After all, the Atari 2600 uses the 6502 processor.
>
>Does it? I know the Atari 8 bit line of computers did, but I wasn't so
>sure about the 2600.
>
>Roy
>

   Actually no, it doesn't.  It uses a 6507 running at 1.19 MHz.  
   I don't think emulating it on an Apple II is feasable.  If you've ever
programmed a 2600 you'd know why.  Basically there is no graphics sub system. 
Most of your program (over 50%) is generating video.  You can only do game
logic during retrace cycle of the raster on the TV.  
   Basically the 2600 isn't much more than the 6507 and some specialized
circuits to handle joysticks/paddles and generate an RF output. Since the Apple
II series only ran at 1MHz, I don't know exactly how you'd emulate it in
realtime.  To get it work, my guess would be you'd have to add some hardware to
an Apple II...  I'd say if your best bet would be to buy a 2600... :-)