Epson LQ 1050 Technical Manual - Page 30

1.7 PRINTER INITIALIZATION There are two initialization methods: hardware initialization and software initialization. REV.-A 1.7.1 Hardware Initialization This type of initialization occurs when printer power is turned on or when the printer receives the INIT signal from the host computer via the 8-bit parallel interface. When printer is initialized in this way, it performs the following actions: q Initializes printer mechanism. q Sets the on-line mode. q Sets the page length to 11 or 12 inches according to the DIP switch. q Clears the input data buffer and print buffer. q Read DIP switch and jumper settings. q Sets the print mode according to the DIP switch and the non-volatile memory set by control panel. q Sets printer selections to their default values 1.7.2 Software Initialization This type of initialization occurs when the printer receives command (ESC @) via software. When the printer is initialized in this way, it performs the following actions: q Clears the print buffer. q Sets printer selections to their default values. NOTE: The printer's default values are as follows: Page Position Preset paper position becomes top of form position Left and Right Margin Released Line Spacing 1/6 inches Vertical Tab Position Cleared Horizontal Tab Position Every 8 characters (relative) VFU Channel Channel O Family Number of Type Style Roman (Family Number O) Downloaded Characters Deselected: Software initialize Cleared: Hardware initialize Justification Left justification Character Per Inch 10 Bit Image Mode Assignment ESC K = ESC X O, ESC L = ESC X 1, ESC = ESC X 2, ESC Z = ESC X 3 Printing Effects Cleared q 1-21