IBM 4400 manual Line Spacing 7/72 Inch, Ascii Code ESC a n Hex Code

Chapter 4 Configuring the Serial Matrix Emulation with Control Codes

Line Spacing 7/72 Inch

ASCII Code ESC 1

Hex Code	1B 31
Dec Code	27 49
Purpose	Specifies the line spacing at 7/72-inch (10.3 lpi) increments.
Comment	When the 7/72-inch line spacing control code is received, all
	lines are printed at the 7/72-inch line spacing until a new line
	spacing is selected or the printer is reset. The control code line
	spacing selection overrides the control panel line spacing
	setting, and the message display reflects the line spacing as
	10.3 lines per inch.
	Caution should be used when combining this control code with
	other print attributes such as Elongated (Double High),
	Superscript, or Subscript; overlapping lines may occur. Printing
	at different horizontal and vertical densities do not overlap.
Example	The following example illustrates 7/72-inch line spacing.

Line Spacing n/72 Inch

ASCII Code ESC A n

Hex Code	1B 41 n
Dec Code	27 65 n
Purpose	Stores a line spacing of n/72-inch increments.
where:	n = 1 through 85 (all others are ignored)
Comment	When the ESC A control sequence is received, all line feed
	commands following an ESC 2 sequence are at n/72-inch line
	spacing until a new line spacing is selected or the printer is
	reset. The control code line spacing selection overrides the
	control panel line spacing setting.
	Small values of n may result in overlapping lines. Overlapping
	lines may also occur if print attributes such as Elongated
	(Double High), Superscript, or Subscript characters are used on
	the same line. Printing at different horizontal and vertical
	densities do not overlap.
Example	The following example illustrates 20/72-inch line spacing.

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