IBM 4400 manual Line Spacing 8 or 10.3 lpi, Ascii Code ACK Hex Code Dec Code Purpose

Chapter 3 Configuring the XQ Emulation with Control Codes

Line Feed

ASCII Code LF

Hex Code 0A

Dec Code 10

Purpose Prints the data in the buffer (if any) and advances the vertical character position one line at the current line space setting.

Comment If configured for LF equals new line (LF=CR+LF), the logical print head is positioned at character column 1 of the new line. Otherwise, the logical print head does not move when configured for LF function only (LF=LF ONLY). The LF function cancels all single line print attributes such as double high (elongated) and double wide (expanded) characters.

This code is always configured for LF=CR+LF in the P-Series XQ protocol.

In the P-Series XQ Even Dot Plot mode (high density graphics), the LF code does not cause paper position motion; the data in the buffer is plotted and the logical print head is positioned at character column 1 in anticipation of the Odd Dot Plot control code to complete high density graphic plotting.

In the P-Series XQ Odd Dot Plot mode (normal density graphics), the LF code plots the data in the buffer, advances the paper position a single dot row at the current vertical dot density, and positions the logical print head at character column 1.

Line Spacing (8 or 10.3 lpi)

ASCII Code ACK

Hex Code	06
Dec Code	6
Purpose	Selects line spacing of 1/8 inch or 7/72 inch for current line only.
Comment	The line spacing control code can be placed anywhere in the
	data stream before the line terminator code; however, we
	recommend that you place the line spacing code at the start or
	end of the data line.
	After the line is printed at the new line spacing, the default line
	spacing is automatically reselected.
Example

70