HP 8921A Programmer's Manual page 394

Chapter 7, IBASIC Controller
Method #2. Developing Programs on the Test Set Using the IBASIC EDIT Mode
Entering and Exiting the IBASIC EDIT Mode
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To enter the IBASIC EDIT Mode first position the cursor on the
field, type the word EDIT on the terminal or PC connected to the
Command Line
Test Set and then press the ENTER key on the terminal or PC. At this point the
Test Set will fill the PC screen with 22 lines of IBASIC code from the program
currently in the Test Set's RAM memory. No program lines will be displayed on
the Test Set screen. If no program is currently in the Test Set's memory, the
number 10 will be displayed on the terminal or PC screen. This represents
program line number 10 and is displayed to allow you to begin writing an IBASIC
program beginning at line number 10. The "*" annunciator will be displayed in
the upper, right corner of the Test Set indicating that the IBASIC controller is
running to support the full screen edit mode.
After editing is complete, exit the IBASIC EDIT Mode by pressing the terminal or
PC's ESCAPE key twice or pressing the SHIFT CANCEL keys on the Test Set.
A variety of editing commands are supported by the IBASIC EDIT Mode. These
commands are activated in the Test Set as escape code sequences. Most terminals
and PC terminal emulator programs allow function keys to be configured with
user defined escape code sequences and user defined labels for the keys. An
escape command (when received by a peripheral device like a printer or the Test
Set) causes the peripheral to recognize subsequent ASCII characters differently.
In the case of the Test Set, escape sequences are used for executing IBASIC EDIT
Mode editing commands.
For example, ESCAPE [L causes the Test Set to insert a new line number where
the cursor is positioned.
Test Set. There is no escape code for DELETE CHARACTER. Use the
Backspace key for deleting. Use the arrow keys to position the cursor.
lists the editing escape codes for the
Table 42 on page 396
IBASIC