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The keyboard can be divided into 3 sections:
Beside the LCD screen there's a small table:
| PRT ON|| PRT OFF||=====|
| DEG|| RAD|| GRA|
| WRT|| TRACE ON|| TRACE OFF|
| RUN||[.] EXT||MODE|
| RUN||The default mode when you power it up. Is used for running programs or when you use it as a 'normal' calculator.|
| WRT||The 'Edit' mode. Used when you write programs...|
| TRACE ON||Used for singlestepping through programs? (Real programmers don't singlestep)|
| TRACE OFF|
| DEG||Degrees, Radians and Gradians. Calculator mathemathical modes... (Don't ask me. I'm no math genious :-)|
| PRT ON||When activated, will send everything that is displayed to the printer.(If connected.)|
| PRT OFF|
|[.] EXT||Extended character set. Used when editing. When activated, will give minor case characters. The [Shift] key in combination with other charcters gives the symbol below the key.|
The List command can be used in different ways:
In RUN mode, the List command will list the default program line by line with a short delay between each line. If the line is longer than the screen, then it will scroll to the end first.
If you want to list another program, type the number after the List command...
In Write mode, pressing List wll result in the PB-100 displaying the first line of the default program. Pressing the [EXE] will step trough the program. While doing this, it is possible to edit the line that is displayed.
If you type a line number after the List command, then it will jump directly to that line.