Talk:Programmable logic array

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Redirect[edit]

Why isn't the PLA redirecting to the PAL articles, isn't it the same thing?

It's not. PAL is one company's implementation of PLA technology. PAL has programmable AND array and fixed OR array, while in PLA both are programmable.

Show discrete parts[edit]

It would be good to show the diodes in the array. There's such a lack of diodes being shown that I'm beginning to see people on the web misinterpreting the wired-and and wired-or as using conventional and/or gates with fuses on the inputs.

It would also be helpful to show the pullup and pulldown resistors in the illustration and mention that the pulldowns are weaker signals than the pullups. — Preceding unsigned comment added by 132.160.49.90 (talk) 00:10, 19 November 2019 (UTC)[reply]

another type of PLA[edit]

I hear that inside the 6502,

The "Decode ROM" is named as a ROM in Hanson's block diagram, although it has wordline inputs and no address decoder. It is sometimes described as a PLA although it also lacks an AND plane. It is a structured layout of NOR gates with many common inputs -- [1].

Is there a specific name for this kind of "single matrix of NOR gates" layout?

Should this Wikipedia article mention that at least some people refer to such a "single matrix of NOR gates" as a kind of PLA, at least as an alternate definition of PLA?

It doesn't seem to exactly match Wikipedia's definition of a PAL or GAL a ROM or a CPLD or a FPGA, at least according to Wikipedia's current definitions, so what is it? --DavidCary (talk) 01:06, 19 May 2021 (UTC)[reply]