Star Micronics SG-15, SG-10 user manual Here is what this program will print

1 Backspace, delete, and cancel text

Backspace (CHR$(8)) “backs up” the printhead so that you can print two characters right on top of each other. Each time SG- 10/l 5 receives a backspace it moves the printhead one character to the left, instead of to the right. You can strike over multiple letters by sending more than one backspace code.

Delete (CHR$(127)) also “backs up” one character, but then it “erases” the previous character (it’s erased from SG-10/15’s buffer, not from the paper).

Cancel text (CHR$(24)) deletes all the text in the print buffer; that is, in the line before the delete text command. Since SG- 10/l 5 prints one line of text at a time, only that line will be deleted.

The following program shows how these three codes work.

NEW

10 LPRINT "BACKSPACE DOES NOT";

20 LPRINT CHRS(8) CHRS(8) CHR$(8);

30 LPRINT "Z== wow"

44)LPRINT "DELETE DOES NOT";

50 LPRINT CHR$(127) CHR$(127) CHR$(l27); 60 LPRINT "WORK"

70 LPRINT "CANCEL TEXT";

84)LPRINT CHR$(24);

90 LPRINT "DOES NOT PRINT"

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Here is what this program will print:

BACKSF’ACE DOES W@% WURt:::

DELETE	DOES WORK:	-
I’XIES	NC?T F’KINT

The backspace codes in line 20 move the printhead a total of		-.
three spaces to the left so that the first part of line 30 will overprint
the word “NOT”. The delete codes in line 50 “erase” the three
letters in the word “NOT” so that it doesn’t even print.
In line 80, CHR$(24) deletes the words in line 70. The semicolon
at the end of line 70 prevents a line feed from causing that line
to print before SG-lo/15 receives the CHR$(24) code. The text
in line 90 prints as it normally would because it is after CHR$(24).
W “Zero”	printing
Sometimes, you want to print “zero” with slash to distinguish
between “0” and “0”. Your SG-lo/15 can print either “0” or
“pl” as you	wish.

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