DWP 210  (260-1257)           Control Codes            Faxback Doc. # 4590

SENDING CONTROL CODES FROM BASIC

Some Printer features are activated by a single code, but many functions 
require a sequence of two or more codes. Most multiple code sequences begin 
with decimal 27 (referred to as the "ESCape" code). The ESC code notifies 
the Printer that a special sequence is on its way. The next code(s) sent 
determine which Printer feature is selected. In BASIC, use CHR$() to send 
these codes to the Printer.

DEC.    HEX.     MNEMONIC   FUNCTION

10      OA       LF         Feeds the paper by one line at a time. 1/6" 
                            line spacing.

13      0D       CR         Effect Carriage Return and Line Feed in normal
                            mode. However, if the Printer receives this 
                            code after 27 21, it performs only Carriage 
                            Return.  Returns to normal mode when a 27 22 is
                            received.

32      20       SP         Moves the Carriage on character position. 
                            However, two or more SP codes received in 
                            succession do not cause successive spacing, but 
                            they do effect high-speed tabulation. The 
                            Carriage moves even if no character data is 
                            received with 50 ms after an SP code.

14      0E       SO         End the automatic underline print function. The
                            Printer is in this mode when you turn it on.

27 14   1B 0E    ESC SO     Sets the character spacing to 1/12" pitch. It 
                            overrides the Pitch Select Switch setup.

27 15   1B 0F    ESC SI     Sets the character spacing to 1/10" pitch. It 
                            overrides the Pitch Select Switch setup.

27 17   1B 11    ESC DC1    Places the Printer in Proportional Space Mode. 
                            It overrides the Pitch Select Switch setup.

27 21   1B 15    ESC NAC    Once this code is received, code 13 effects 
                            only Carriage Return. This condition continues
                            until 27 code 22 is received.

27 22   1B 16    ESC SYN    Once this code is received, code 13 effects 
                            Carriage Return and Line Feed. The Printer 
                            enters this mode when you turn it on.

27 24   1B 18    ESC CAN    Enters External Program mode (to be described 
                            later).

27 25   1B 19    ESC EM     Exits External Program mode (to be described 
                            later).

08  n   08  n    BS   n     Backspaces the Carriage n number or micro-spaces.
                            The values this byte can assume, 0 through 255,
                            correspond to 0/120 through 255/120 inches
                            respectively. If the data specifies the Carriage
                            to move beyond the home position (left side), 
                            the Printer ignores the data and moves the 
                            Carriage to the home position.

27  n   1B  n    ESC  n     Advances the Carriage n number of micro-spaces.
                            The values this byte can assume, 0 though 9,
                            correspond to 0/120 through 9/120 inches,
                            respectively. If the data specifies the Carriage 
                            to move beyond the right margin, the Printer 
                            simply performs Carriage Return and Line Feed.

27 26   1B 1A    ESC SUB    1/48" Line Feed

27 28   1B 1C    ESC FS     Half Line Feed

27 30   1B 1E    ESC RS     Reverse Half Line Feed

27 10   1B 0A    ESC LF     Reverse Line Feed

(dtc-07/27/93)