LP 3  (260-1156)              Control Codes            Faxback Doc. # 5964

According to the American Standard Code for Information Interchange (ASCII),
there are 32 control codes in addition to the codes for the printable
characters. (Control codes are sent as data, but the receiving device
interprets them as abbreviated instructions, communications-status messages,
etc.)

The Line Printer III recognizes six control codes, and ignores all other
codes.
─────┬──────┬───────┬───────────────────┬──────────────────┬─────────────────
CODE │      │       │                   │                  │
DEC. │OCTAL │HEX.   │DP MODE            │WP MODE           │GRAPHICS MODE
─────┼──────┼───────┼───────────────────┼──────────────────┼─────────────────
10   │012   │OA     │Line Feed. Prints  │Line Feed. Prints │Line Feed. Prints
     │      │       │out current-buffer │out current-buffer│out current-buffe
     │      │       │and advances paper │and advances paper│and advance paper
     │      │       │one line.          │one line.         │one line.
─────┼──────┼───────┼───────────────────┼──────────────────┼─────────────────
13   │015   │0D     │Carriage Return.   │Carriage Return.  │Carriage Return.
     │      │       │Prints buffer; next│Prints buffer;next│Print buffer;next
     │      │       │character will     │character will    │character will
     │      │       │print as start of  │print at start of │print at start of
     │      │       │line. With auto-   │line. With auto-  │line. With auto-
     │      │       │linefeed enable,   │linefeed enable,  │linefeed enable,
     │      │       │paper advances one │paper advances one│paper advance one
     │      │       │line.              │line.             │line.
─────┼──────┼───────┼───────────────────┼──────────────────┼─────────────────
27   │033   │1B     │When these codes   │Ignored           │Ignored
54   │066   │36     │are received in    │                  │
     │      │       │sequence,sets line │                  │
     │      │       │density to six     │                  │
     │      │       │lines/inch.(This is│                  │
     │      │       │the initial line   │                  │
     │      │       │density.)          │                  │
─────┼──────┼───────┼───────────────────┼──────────────────┼─────────────────
27   │033   │1B     │When these codes   │When these codes  │Ignored
56   │070   │38     │are received in    │are received in   │
     │      │       │sequence, sets line│sequence,sets line│
     │      │       │density to eight   │density to eight  │
     │      │       │lines/inch.        │lines/inch.       │
─────┼──────┼───────┼───────────────────┼──────────────────┼─────────────────
30   │036   │1E     │Switches print     │Ignored.          │
     │      │       │density to 66 char-│                  │
     │      │       │acters/line. (This │                  │
     │      │       │is the initial     │                  │
     │      │       │print density.)    │                  │
─────┼──────┼───────┼───────────────────┼──────────────────┼─────────────────
31   │037   │1F     │Switches print den-│Switches print    │Ignored
     │      │       │sity to 66 charac- │density to 66 char│
     │      │       │ters/line. All sub-│-acters/line.All  │
     │      │       │sequent characters │subsequent charac-│
     │      │       │are printed double-│ters are printed  │
     │      │       │width. Printer will│double-width. Prin│
     │      │       │automatically "wrap│ter will automati-│
     │      │       │around" to beginn- │cally "wrap around│
     │      │       │ing of next line   │to beginning of   │
     │      │       │when line is filled│next line when    │
     │      │       │                   │line is filled.   │
─────┴──────┴───────┴───────────────────┴──────────────────┴─────────────────