there is a better diagram on page 70 of
981-0251_ProgrammableLogicDiagramPackage_Sep90.pdf
under dataIO which gives the fuse number

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On 9/22/16 4:23 PM, Glen Slick wrote:
> A Signetics PLS173 PLA has a total of 2178 programmable fuses:
>
> (32 AND gates for logic terms plus 10 AND gates for control terms)
> times
> (24 true/complement inputs plus 20 true/complement inputs/outputs)
> = 1848 fuses
>
> (10 OR gates)
> times
> (32 AND gates logic term outputs)
> = 320 fuses
>
> 10 fuses for true/complement output selection
>
> For reference see the PLS173 FPLA Logic Diagram on page 5-70 (page 242
> of the PDF) of the Signetics PLD Data Manual 1987
> http://www.bitsavers.org/_dataBooks/1987_Signetics_pldData.pdf
>
> The question is for anyone here that knows: How are these fuses in the
> FPLA Logic Diagram numbered as they would be in a JEDEC fuse map file
> used to program a device, or when read back from a device? I can't
> find that information anywhere.
>
> If I read a PLS173 device into a JEDEC fuse map it should be trivial
> to generate the logic equations by hand if the fuse numbering is
> known, which is what I want to do.
>