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Bag of Atari ICs—anything of interest?

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#1 electronizer OFFLINE  

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Posted Mon Mar 5, 2018 2:15 PM

I came across a bag of random ICs in some boxes of Atari stuff I acquired last year. I sorted out all the unique chips and straightened a lot of bent pins. Here's what I have:

 

Atari Chips 1.jpg

 

Atari Chips 2.jpg

 

The gold and ceramic IC marked "proto" is apparently a 2600 Defender chip (CO12009).  Anything else of interest here?



#2 _The Doctor__ ONLINE  

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Posted Mon Mar 5, 2018 2:43 PM

I'd use them to repair a number of Atari's rom carts... though the CTIA's aren't super useful... they can get you by in a pinch...


Edited by _The Doctor__, Mon Mar 5, 2018 3:30 PM.


#3 Nezgar OFFLINE  

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Posted Mon Mar 5, 2018 2:48 PM

CO12295 CTIA (predecessor of GTIA) would have been pulled from early Atari 800's, and may be of interest to some for historical purposes.

I'd hazard a guess, at 24 pins, these are mostly 2KB or 4KB ROM's, like you mentioned, for 2600 games...


Edited by Nezgar, Mon Mar 5, 2018 2:48 PM.


#4 _The Doctor__ ONLINE  

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Posted Mon Mar 5, 2018 3:38 PM

second one in from top right is pacman 2600

second one down from top right is demons to diamonds, since you don't have them in numerical order... here is a common list.. there are more complete lists floating about..

CO11201 Combat
CO11202 Air Sea Battle
CO11203 Star Ship
CO11205 Outlaw
CO11206 Slot Racers
CO11207 Canyon Bomber
CO11211 Race
CO11212 Street Racer
CO11218 3D Tic Tac Toe
CO11221 Video Olympics
CO11222 Breakout
CO11223 Baseball
CO11224 Basketball
CO11225 Football
CO11227 Human Cannonball
CO11228 Bowling
CO11229 Sky Diver
CO11233 Night Driver
CO11234 Golf
CO11239 Othello
CO11261 Basic Math
CO12008 Super Breakout
CO12009 Defender
CO12010 Warlords
CO12013 Adventure
CO12015 Demons to Diamonds
CO12016 Soccer
CO12017 Backgammon
CO12030 Circus Atari
CO12031 Superman
CO12032 Space Invaders
CO12035 Maze Craze
CO12036 Video Checkers
CO12038 Missile Command
CO12041 Superman
CO12045 Video Chess
CO12046 Pac-Man
CO12047 Submarine Commander
CO12048 Video Pinball
CO12050 Berserk
CO12052 Casino
CO12054 Haunted House
CO12055 Yar's Revenge
CO12058 Math Gran Prix
CO12062 Hangman
CO12937 Dodge 'Em
CO16440 Realsports Baseball
CO16449 Asteroids
cn45160 Venture
cn55210 Donkey Kong jr
cn55237 Tapper
cn55238 Tapper
cn55241 Spy Hunter


Edited by _The Doctor__, Mon Mar 5, 2018 3:56 PM.


#5 alex_79 OFFLINE  

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Posted Mon Mar 5, 2018 3:44 PM

All but the last (marked "CO1203202") 24 pin chips are listed in the "Atari Engineering information System - Master List" document, that you can find on Atarimania:

http://www.atarimani...uments_4_2.html

 

CO12008        SUPER BREAKOUT CX2608 CARTRIDGE
CO12046        PAC-MAN    CX2646 CARTRIDGE
CO18308        PAC-MAN (rom #1) CX5208 CARTRIDGE
CO12015        DEMONS TO DIAMONDS CX2615 CARTRIDGE
CO12048        VIDEO PINBALL CX2648 CARTRIDGE
CO18313        SOCCER (ROM #1) CX5213 CARTRIDGE
CO12032        SPACE INVADERS CX2632 CARTRIDGE
CO12054        NIGHTMARE MANOR (HAUNTED HOUSE) CX2654 CARTRIDGE
CO18802        MISSILE COMMAND CX5202 CARTRIDGE
CO12009        DEFENDER CX2609 CARTRIDGE
CO12038        MISSILE COMMAND CX2638 CARTRIDGE
CO12499        CUSTOM ROM
CO18805        STAR RAIDERS (ROM #2) CX5205 CARTRIDGE
CO18807        FOOTBALL (ROM #1) CX5207 CARTRIDGE
CO18817        POLE POSITION (ROM #1)    CX5217 CARTRIDGE
CO18812        QIX (ROM #2) CX5212 CARTRIDGE
CO19156        ROM 16K OPERATING SYSTEM - CUSTOM ROM (I.C.) - PAM
CO18813        SOCCER (ROM #2) CX5213 CARTRIDGE
CO19407        FOOTBALL (ROM #2) CX5207 CARTRIDGE
CO18814        TENNIS (ROM #2) CX5214 CARTRIDGE
CO19415        CENTIPEDE (ROM #2) CX5215 CARTRIDGE
CO19857        SWORDQUEST FIREWORLD CX2657 CARTRIDGE
CO18815        CENTIPEDE (ROM #1) CX5215 CARTRIDGE
CO19418        DEFENDER (ROM #2) CX5218 CARTRDIGE
 



#6 _The Doctor__ ONLINE  

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Posted Mon Mar 5, 2018 3:57 PM

cn is for third party chips and carts.



#7 Rybags ONLINE  

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Posted Mon Mar 5, 2018 4:47 PM

CTIA is very rare and worth some good money.  There are also undocumented behaviours of this chip that need to be investigated.



#8 electronizer OFFLINE  

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Posted Mon Mar 5, 2018 6:31 PM

CTIA is very rare and worth some good money.  There are also undocumented behaviours of this chip that need to be investigated.

 

 

If I wanted to test the CTIA chips could I just plug them into any 400 or 800 CPU board? Or does it have to be a certain revision?

 

Is there currently an effort underway to better replicate the behavior of CTIA in an emulator?



#9 Kyle22 OFFLINE  

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Posted Mon Mar 5, 2018 7:06 PM

There should have been a C011223F version made. Frog baseball.
:)

#10 Rybags ONLINE  

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Posted Mon Mar 5, 2018 7:20 PM

CTIA should be directly exchangable with the NTSC GTIA.  Common belief is that there was never a PAL CTIA.

 

The most prominent known difference is that artifact colours are supposed to be different and unlike differences among machines it is supposed to originate at the chip.

Also there is supposed to be some difference with positioning of PM graphics though it would need further investigation.

Of course GTIA modes won't work on CTIA, you'll just get Graphics 8 with the pixels plotted improperly.  But the OS supported GTIA modes from the original revision.



#11 ijor OFFLINE  

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Posted Mon Mar 5, 2018 9:59 PM

Also there is supposed to be some difference with positioning of PM graphics though it would need further investigation.

 

I think we confirmed the behaviour long ago. The difference is the alignment (one half cycle) between hires on one side, and both lorez and players on the other. And the different artifacts is just a consequence of this alignment.

 

We have die shots of CTIA, but only for the top layer. It is difficult to read the complete silicon layout without delayering (removing the top metal layer). It would be nice if another CTIA could be saved for another decap round.

 

See this thread: http://atariage.com/...8-ctia-vs-gtia/

 

Edit: Added link to old thread about ctia vs gtia


Edited by ijor, Mon Mar 5, 2018 10:08 PM.


#12 electronizer OFFLINE  

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Posted Tue Mar 6, 2018 12:37 PM

All but the last (marked "CO1203202") 24 pin chips are listed in the "Atari Engineering information System - Master List" document, that you can find on Atarimania:

http://www.atarimani...uments_4_2.html

 

CO12008        SUPER BREAKOUT CX2608 CARTRIDGE
CO12046        PAC-MAN    CX2646 CARTRIDGE
CO18308        PAC-MAN (rom #1) CX5208 CARTRIDGE
CO12015        DEMONS TO DIAMONDS CX2615 CARTRIDGE
CO12048        VIDEO PINBALL CX2648 CARTRIDGE
CO18313        SOCCER (ROM #1) CX5213 CARTRIDGE
CO12032        SPACE INVADERS CX2632 CARTRIDGE
CO12054        NIGHTMARE MANOR (HAUNTED HOUSE) CX2654 CARTRIDGE
CO18802        MISSILE COMMAND CX5202 CARTRIDGE
CO12009        DEFENDER CX2609 CARTRIDGE
CO12038        MISSILE COMMAND CX2638 CARTRIDGE
CO12499        CUSTOM ROM
CO18805        STAR RAIDERS (ROM #2) CX5205 CARTRIDGE
CO18807        FOOTBALL (ROM #1) CX5207 CARTRIDGE
CO18817        POLE POSITION (ROM #1)    CX5217 CARTRIDGE
CO18812        QIX (ROM #2) CX5212 CARTRIDGE
CO19156        ROM 16K OPERATING SYSTEM - CUSTOM ROM (I.C.) - PAM
CO18813        SOCCER (ROM #2) CX5213 CARTRIDGE
CO19407        FOOTBALL (ROM #2) CX5207 CARTRIDGE
CO18814        TENNIS (ROM #2) CX5214 CARTRIDGE
CO19415        CENTIPEDE (ROM #2) CX5215 CARTRIDGE
CO19857        SWORDQUEST FIREWORLD CX2657 CARTRIDGE
CO18815        CENTIPEDE (ROM #1) CX5215 CARTRIDGE
CO19418        DEFENDER (ROM #2) CX5218 CARTRDIGE
 

 

 

Thanks for the link to the Master List document—what an amazing resource! The CO12499B "custom ROM" is apparently version B of the 400 OS. Also I wonder if the CO1203202 chip has anything to do with CO12032 Space Invaders?



#13 _The Doctor__ ONLINE  

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Posted Tue Mar 6, 2018 12:49 PM

easy enough to check, just pop them in socket-ed cart pcb...






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