Peek and Poke CLI

This component provides CLI commands to peek and poke memory locations and registers.

* peekw
    Peek word: peekw <hex addr>
* peekb
    Peek byte: peekb <hex addr>
* pokew
    Poke word: pokew <hex addr> <hex value>
* pokeb
    Poke byte: pokeb <hex addr> <hex value>