Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!ucsd!sdd.hp.com!elroy.jpl.nasa.gov!jato!whoffman
From: whoffman@jato.jpl.nasa.gov (Walt Hoffman)
Newsgroups: comp.sys.atari.8bit
Subject: Re: Need information on Atari 5200 game
Message-ID: <1991Jan22.001137.26717@jato.jpl.nasa.gov>
Date: 22 Jan 91 00:11:37 GMT
References: <14255@chaph.usc.edu>
Reply-To: whoffman@jato.Jpl.Nasa.Gov (Walt Hoffman)
Distribution: usa
Organization: Jet Propulsion Laboratory, Pasadena, CA
Lines: 32

In article <14255@chaph.usc.edu> dpalermo@aludra.usc.edu (Dan Palermo) writes:
>  I have picked up a surplus 5200 ...
>...(what) are all 40 pin chips ..able
>
>		OKI (Atari) C012294-22 M3981
>		Rockwell    C014806-12  8302
>		AMI         C014805-1  8308MDL  C03069
>		AMI         C012296D-01  8249MBQ  C04473

CO12294 is a custom Atari chip nicknamed POKEY.  It stands for POt/KEYboard.
It is used for I/O, sounds, paddle inputs, and internal timing.

CO14806 is a slightly modified 6502 microprocessor.  Atari added some circuitry
internally to cut down on the parts count to syncronize operation with the 
custom graphics chip.  This had the nickname CPU SALLY.

CO14805 is the GTIA chip used for graphics.  It stands for Graphic Television
Interface Adapter.  Its primary task is to generate color and luminance signals
from the ANTIC display processor.  It also monitors the joystick trigger
buttons.

CO12296 is the ANTIC chip which is the display processor.  It stands for
Alphanumeric Television Interface Controller.  It is a custom display
microprocessor with an instruction set customized for graphics generation.
It also has the ability to control the address and data bus and RAM refresh.


-- 
Walt Hoffman -- Jet Propulsion Laboratory
whoffman@jato.jpl.nasa.gov or elroy!jato!whoffman@csvax.caltech.edu
  Galileo Orbiter Engineering Team  --  Real-Time Analyst
     "Jupiter...it's not just a goal, it's an adventure."