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Full Version: HP 95LX prototype PCB
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Well, that 95LX was only semi complete and didn't power up - so I disassembled it. Look what I found:

No wonder it didn't boot: this one has 3 x 256kB RAM installed - but no ROM. It probably used a Flash card to boot.

Both ICs are prototypes: marked as "SAMPLE" and "ES" (aka "Engineering Sample").

(it came in a standard enclosure with standard SN, no hint of a prototype...)