In debug mode there are several elements on the screen.
In the upper left corner is a listing with disassembled instructions around the instruction pointer.
To the right of this the CPU registers are shown. These can be switched from signed to unsigned and from hex to decimal display. The values are editable, the edited value is taken after the user pressed return.
Far to the right are the buttons located to control the debugger. These are similar to the menu entries of the Debug menu.
To the lower left is a listing with a representation of the current memory. The memory is displayed in maximal 16k, dividing the available memory into 4 equal sized parts. If a memory cell is selected it can be edited similar to the CPU Registers.
In the lower Right is a representation of the memory located above the current stack pointer. The last 20 positions are shown in this view. This is read only.