From Claude with some prompting
This image explains the registers within the CPU and their purposes. Registers are small, high-speed memory locations inside the CPU that serve various roles.
GPR (General Purpose Registers) are used for calculations, logical operations, etc. (like variables). SP (Stack Pointer Register) remembers the memory location of the stack for calling functions, passing parameters, and managing local variables. BP (Base Pointer Register) refers to the current/next data location within a data structure. PC (Program Counter Register) is the command currently executing, used by the CPU to decide which instruction to execute next. Status Register detects abnormalities resulting from operation performance and handles them.
It also mentions that there are more registers such as indexes, counters, timers, flags, and more.
Lechuck Park 