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Geneve PEBox Extender

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I know there was made mention about a limitation of 8 cards in a PEBox for the TI-99/4A, thus one could not make a 10 card PEBox.

 

Now, my question is, can there be an extender card that plugs into the PEBox on a Geneve system that then plugs into another PEBox, thus expanding the number of cards the Geneve can use?

 

I know one has not been presently designed, but is it physically possible to do?

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There is a splitter card for the TI that allows for two P-Boxes to be connected to the console. There was another mod (years ago) that connected a cable to an empty slot in the PEB and allowed for a second PBOX to be "daisy-chained" that would probably work with a Geneve.

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It might not be a bad idea to run the cable daisy-chaining PEBs through a set of buffer chips to keep from overloading bus drivers--that may have timing consequences, however.

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Well, I am not to build such a setup myself, but if someone does, I am interested.  Probably wouldn't hurt to have an idea what the price would be before venturing too far.

 

Not sure if @Shift838 PEBox card he is building could be used to daisy chain two PEBoxes together with just 2 cards, and a different cable.

 

Beery

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