Compaq 5525B/31/32 General Information, Programmatic Printer Control, Logical and Physical Pages

Chapter 2 Configuring the PCL-II Emulation with Control Codes

General Information

Programmatic Printer Control

Control codes and multi-character escape sequences are used to control the printers.

The printers execute command parameters in the order they are received. Therefore, the order of the parameters is significant. Unrecognized escape sequences are ignored in their entirety and may cause erroneous printing since the printer may be unable to perform the requested operation.

Logical and Physical Pages

The limits of the logical page determine the area in which printing can take place. Logical page length is set programmatically (in lines per page). Physical page length is set via the control panel and indicates the actual size of a single page. The physical page length cannot be changed programmatically. Refer to the User’s Manual for more information.

Table 2. Control Codes

Function	Symbol	Binary	Level	Description
Backspace	BS	1000	II	Move one column left.
Horizontal	HT	1001	V	Move the current active position to the next
Tab				tab stop on the current line. The tab stops are
				at the left margin and every 8th column
				between the left and right margins. If new
				position crosses the right margin, the new
				position is set to the right margin.
Line Feed	LF	1010	I	Move to next print line while maintaining
				current column position
Form Feed	FF	1100	I	Move to first line at top of the next page while
				maintaining current column position
Carriage	CR	1101	I	Move to the left margin on current print line
Return
Shift Out	SO	1110	I	Select following characters from the current
				secondary character font until receipt of a
				Shift In
Shift In	SI	1111	I	Select following characters from the current
				primary character font until receipt of a Shift
				Out
Escape	ESC	11011	I	The following characters are a special control
				sequence

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