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This isn't true. The 4004 was obsolete by the time the 6502 was designed and nobody really thought of the 4004 as a CPU -- it rose to prominence years later as
by dboreham 3y ago
This isn't true. The 4004 was obsolete by the time the 6502 was designed and nobody really thought of the 4004 as a CPU -- it rose to prominence years later as part of the victors (Intel) getting to write history. The 6502 was explicitly designed to compete with the 6800, so much so that it was pin compatible until legal action resulted in it being changed.
- systems_glitch 3y agoI'm trying to dig up the Chuck Peddle interview where he talks about targeting the embedded 4004 and friends market, I'll post it when I finally find it. The interview mentions achieving functional parity with the MCS-4 chip family as the reason for e.g. the 6530 RRIOT. The 4004 was old by then, but not obsolete. It and the 4040 were still being integrated into embedded systems where cost was a major factor through the late 70s.
- systems_glitch 3y agoFound it! Bill Mensch, not Chuck Peddle, and it's an IEEE Spectrum interview: https://spectrum.ieee.org/q-a-with-co-creator-of-the-6502-processor https://spectrum.ieee.org/q-a-with-co-creator-of-the-6502-pr...