Food Fight Switching Power and AR2

colonelsnow

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I have a Food Fight that was converted to a switching power supply. Everything works other than the joystick calibration is lost upon shutdown. The cabinet is missing the Atari power brick but I do have a working AR2. My question is can I feed 5v and 12v from the switcher to the AR2 and then the 5V and 12V from the AR2 to the board as a way to accomplish the data write back that the board is looking for to save the calibration.
 
I will think after looking at the schematics this won't work. 36v in on the AR2 produces 12v out. The 10.6v in which concerts to 5v is what is monitored for a voltage drop to activate the save.
 
isnt there a battery or backed up IC or some other sort of writable part on the board that saves that data? kinda like the IC on star wars that does the same?
 
isnt there a battery or backed up IC or some other sort of writable part on the board that saves that data? kinda like the IC on star wars that does the same?

It does but the NVRAM is not a standard one. It gets a signal to write based on the power dropping below a certain voltage. My understanding is a switching power supply does not work because the power to the board shuts off instantly as oppossed to gradually (relatively speaking)
 
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It does but the NVRAM is not a stndard one. It gets a signal to write based on the power dropping below a certain voltage. My understanding is a switching power suply does not work because the power to the board shuts off instantly as oppossed to gradually (relatively speaking)

Ah yes, that syndrome. I'm familiar with that happening on WMS boards but not Atari boards.
 
I have a Food Fight that was converted to a switching power supply. Everything works other than the joystick calibration is lost upon shutdown. The cabinet is missing the Atari power brick but I do have a working AR2. My question is can I feed 5v and 12v from the switcher to the AR2 and then the 5V and 12V from the AR2 to the board as a way to accomplish the data write back that the board is looking for to save the calibration.

Food Fight uses an x2212 not an ER2055, so it doesn't require any special voltages. There's a good chance your x2212 has just exceeded it's maximum number of store/recall cycles, or that the store/recall decoding is bad.

The ~POWER line is just preventing spurious writes from UPDATE once the 10.3V drops.... the STORE is triggered by code after new data is written, not at powerdown.
 
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Food Fight uses an x2212 not an ER2055, so it doesn't require any special voltages. There's a good chance your x2212 has just exceeded it's maximum number of store/recall cycles, or that the store/recall decoding is bad.

The ~POWER line is just preventing spurious writes from UPDATE once the 10.3V drops.... the STORE is triggered by code after new data is written, not at powerdown.

If the maximum number of store/recall cycles had been exceeded high scores would no longer save, correct?
 
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