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Walleij: Setting up the Arm32 architecture

Walleij: Setting up the Arm32 architecture

Posted Nov 5, 2020 9:46 UTC (Thu) by farnz (subscriber, #17727)
In reply to: Walleij: Setting up the Arm32 architecture by linusw
Parent article: Walleij: Setting up the Arm32 architecture

No, thank you for a great set of articles!

I just happened to know where to look for details of that vector, as I have vague memories of it from the Acorn Archimedes days. IIRC, ARMv4 can optionally run in ARM26 mode (at the discretion of the silicon designer), and ARMv5 onwards is ARM32 only. It's only ARMv1/ARMv2 that must run in ARM26 mode, and the last ARMv2 series chip was the ARM3.

ARM naming up until Cortex was confusing as all get-out, since the ARM610 is an ARMv3 chip, and the first ARMv5 chip is the ARM9 series, while ARM7, ARM8 and ARM9 chips are all ARMv4.


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