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The instructions that took advantage of FPM DRAM already existed in ARM1, only the implementation was different. And exactly these instructions (that essentiall
by dfox 3y ago
The instructions that took advantage of FPM DRAM already existed in ARM1, only the implementation was different. And exactly these instructions (that essentially do the RISC/SPARC-like register window shift as an explicit operation) are the reason why ARM should be ACM, as in Acorn CISC Machine.
- laurencerowe 3y agoI ignored the ARM1 as I thought it was more of a prototype. > ARM1 was distributed as an evaluation system and was never commercialized. https://en.wikichip.org/wiki/acorn/microarchitectures/arm1 https://en.wikichip.org/wiki/acorn/microarchitectures/arm1