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Xerox Alto RAM MM5280D boards

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  Xerox Alto RAM MM5280D boards by Bill Degnan - 01/09/2014 12:07
Xerox Alto MM5280D RAM chips 1976
Close up view of a Xerox Alto RAM board 16K dynamic MM5280D RAM chips, which have a silkscreen production date code of mid 1976. Click image for larger view.


Actual RAM boards are too large for my flat-bed scanner, so I took two scans of each RAM board imaged. I also have a third similar board, that's the source of the close up RAM chip view. Each board is 128K I believe, 16-bit.

More photos.

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