In this example, the S key has been pressed several times. The “Variables” windows hows
variable I and its current value, 5. The Output window shows the PRINT statements that have
been executed so far.
The program text itself (left panel) is in plain font; there are three possible colours as follows:
•
Cursor position – shown here as a purple square, but it is green in PuTTY with a black
background. The line containing the cursor is the current program breakpoint, unless the
cursor is at the top left of the screen in its default position.
•
Inverse video (the “PRINT I” line in this case) – this is the line of code which has just been
executed in the last step.
•
Coloured blue (or, in normal black background PuTTY, yellow) – this is the program line
that will be executed in the next step.
As usual, press Ctrl-Q to quit the Debugger and go back to the editor.
U4B operating manual Rev 1.00
12