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Where is the Bank-Switching code in 'real' roms?

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Hello:

 

I was looking at a 16k board, and a thought came to me: I see just the main ROM on the board, and no smaller chip that contains the bank switching code. (I think it's called a GAL?)

 

Assuming that the bins contain all the information found in the ROM, where is the bank-switching code in an actual cartridge?

 

Thanks :)

Bob

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It's not "code", it's circuitry. And when you're buying chips in the tens of thousands, a chip manufacturer will happily add a few dozen extra transistors. It's a LOT cheaper than having to use a separate chip, even a glop-top.

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Thanks guys - that explains things.

 

I guess that's why nobody tried to get a 16K eprom re-wired on a standard 16K Atari cart.

 

Bob

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