!UCDebug allows to run codes in a controlled manner, displaying the behavior and changes in the register set and memory. A simple list of commands (and their syntax) can be found by typying "help" at the Console window of the debugger. !UCDebug runs in a Raspberry Pi 1B+ under version 5.24 of RISC OS (released on 16-April-2018). To properly visualize the debugger, a minimum screen resolution of 1366x768 (for widescreen monitors) or 1024x768 (for regular 4:3 monitors) is needed. Read more.