History of general-purpose CPUs: Revision history

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30 April 2025

  • curprev 13:3013:30, 30 April 2025‎ imported>Comp.arch‎ 44,531 bytes +44,531‎ →‎Timeline of events: Thumb (neither ARM) based on SuperH (SH-2 seemingly and/or SH-2A, specify in text?). The source doesn't say so, i.e. not same ISA, though related, uses the word "precursor" (and exploits SuperH patents that ran out?!). SuperH has 16 registers (i.e. 4 bits to specify), even in compressed 16-bit long instructions, while Thumb's 16-bit have only access to 8 GPRs ( subset of 16 in full 32-bit instructions).
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