RE: [stella] FYI - ROM on CPU board works.

Subject: RE: [stella] FYI - ROM on CPU board works.
From: Robert "A." Colbert <colbertb@xxxxxxxxxxxx>
Date: Tue, 20 May 1997 07:53:23 -0500
>Reply to your message of 5/20/97 7:47 AM
>Just for the record - I put an IC socket into my 2600 CPU board,
>and then put a Combat ROM into it.  Sure enough, It fired up Combat.
>It looks like this technique is limited to a 2K ROM, because there aren't
>any more pins for anything bigger!
>I didn't think there was any cart-select logic, however, and sure enough when I
>use a cart in the cartridge slot at the same time it didn't work.

Well, I did this a long time ago too, and I found that if you install Combat
in the socket, then the only game that works in the cart slot is Combat.  What this means is that BOTH the socketed game and the cart are active simultaneously.  An Atari Cart has 2 ground pins, probably two to complete a
"cart-select logic" circuit that wasn't implemented.


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