CDS-3310
Chapter
7 Application Programming
i
17
:ED 5
Puts Editor at line 5
:ED #BEGIN
Puts Editor at label #BEGIN
Line numbers appear as 000,001,002 and so on. Program commands are entered following the line
numbers. Multiple commands may be given on a single line as long as the total number of characters
doesn't exceed 80 characters per line.
While in the Edit Mode, the programmer has access to special instructions for saving, inserting and
deleting program lines. These special instructions are listed below:
Edit Mode Commands
<RETURN>
Typing the return key causes the current line of entered instructions to be saved. The editor will
automatically advance to the next line. Thus, hitting a series of <RETURN> will cause the editor to
advance a series of lines. Note, changes on a program line will not be saved unless a <return> is given.
<cntrl>P
The <cntrl>P command moves the editor to the previous line.
<cntrl>I
The <cntrl>I command inserts a line above the current line. For example, if the editor is at line
number 2 and <cntrl>I is applied, a new line will be inserted between lines 1 and 2. This new line will
be labelled line 2. The old line number 2 is renumbered as line 3.
<cntrl>D
The <cntrl>D command deletes the line currently being edited. For example, if the editor is at line
number 2 and <cntrl>D is applied, line 2 will be deleted. The previous line number 3 is now
renumbered as line number 2.
<cntrl>Q
The <cntrl>Q quits the editor mode. In response, the CDS-3310 will return a colon.
After the Edit session is over, the user may list the entered program using the LS command. If no
operand follows the LS command, the entire program will be listed. The user can start listing at a
specific line or label using the operand n. A command and new line number or label following the
start listing operand specifies the location at which listing is to stop.
Example
Instruction Interpretation
:LS List
entire
program
:LS 5
Begin listing at line 5
:LS 5,9
List lines 5 thru 9
:LS #A,9
List line label #A thru line 9
:LS #A, #A +5
List line label #A and additional 5 lines
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