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by msl 43 days ago
That description does not match the RCA 1802 [1] perfectly, but it is probably the best known microprocessor (not a microcontroller, though) without a dedicated program counter. There are a lot of misconceptions about it floating on the internet, so I would not be surprised to hear it described as you did.

[1] https://en.wikipedia.org/wiki/RCA_1802