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Trying to identify this mod/bodge on an Atari 800

mudmin

Experienced Member
Joined
Jan 5, 2022
Messages
91
I have an atari 800 that had a switch with the wires broken just under the cartridge cover and a pushbutton on the right side panel. I'm trying to figure out if this is a repair or some sort of freeze/reset mod.
The 2 wires on the first pic go to the button on the side.
The wires on the chip near the cartridge port have some going to a chip on the underside and some look like they used to be going to the switch. Any thoughts?
 

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ClausB

Experienced Member
Joined
Jan 22, 2012
Messages
180
Looks like it might be a circuit to make upper RAM write-only, to simulate ROM and defeat cartridge copy protection.
 

mutt-gutt

New Member
Joined
Dec 31, 2023
Messages
2
never seen a cartridge that had copy protection in the day the just relied on not many people being able to burn the chips in the cart maybe a switcher to enable ram in the rom locations
did you mean make ram read only as write only would be usless
 
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