Cortex‐A55 - MarekBykowski/readme GitHub Wiki

For example, a processor described as implementing Armv8.2-A:

Must implement all the mandatory features of Armv8.0-A, Armv8.1-A and Armv8.2-A
Is permitted to implement some features from Armv8.3-A
Is not permitted to implement features from Armv8.4-A and later extensions

https://www.vlsiguru.com/arm-architecture-training/

The PC can be read using:
ADR Xd, .

https://arm.fuseuniversal.com/

https://thinkingeek.com/categories/aarch64/

https://learn.arm.com/learning-paths/embedded-and-microcontrollers/bare-metal/

https://www.arm.com/architecture/learn-the-architecture/a-profile