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Citation needed. AFAIK, ARMv7 in user/system mode is backwards compatible with ARMv5 at-least. Even AARCH32 claims so.
by zeusk 10y ago
Citation needed.
AFAIK, ARMv7 in user/system mode is backwards compatible with ARMv5 at-least. Even AARCH32 claims so.
- kps 10y agoAs wtallis said: Cortex-M executes only Thumb instructions, while pre-ARM7TDMI don't execute Thumb instructions.
- zeusk 10y agoCortex-A, Cortex-M, Cortex-R have different targets, ISA, System organization as far back as their origination. Not sure why you'd compare them, I was obviously talking about processors within the same segment, Cortex-R7 is backwards compatible with previous versions, Cortex-A72 is backwards compatible with previous versions, Cortex-M3 is backwards compatible with previous versions.