Mystery HP 1000 board

Eric Smith spacewar at
Fri Jun 17 21:57:07 CDT 2016

On Thu, Jun 16, 2016 at 11:08 PM, tony duell <ard at> wrote:
> Subassemblies (like PCBs) have part numbers with 2 groups of 5
> digits. The first group is the model number of the instrument that
> first used that subassembly, padded with leading zeros. So for
> example the CPU data path (ALU and registers) board in an
> HP9830 is an 09810-66514, as it was first used in the HP9810.

On some early HP gear (1960s), the subassemblies and model-specific
parts have a 4x5 or 4x4 part number, with the base model number as the
first part, rather than the later 5x5.

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