IBM 4400 manual Unexpected print format may result

Chapter 4 Configuring the Serial Matrix Emulation with Control Codes

Delete

ASCII Code DEL

Hex Code 7F

Dec Code 127

Purpose Deletes the previously received character on a line.

Comment Characters that have been truncated due to line length restrictions are not affected by this code.

Elongated (Double High) Print (One Line Only)

ASCII Code ESC h

Hex Code	1B 68
Dec Code	27 104
Purpose	Selects elongated (double high) character printing for one line
	only. Elongated characters are approximately double height but
	standard width.
Comment	The elongated character control code is a line-by-line print
	attribute; when the control code is received, one entire line of
	elongated characters is printed and then automatically reset.
	When using this feature with relative line slewing, the paper
	position is moved n + 1 lines rather than n lines. See Chapter 9,
	“Vertical Page Formatting,” for more information on relative line
	slewing. When using small line spacing and the lines overlap, an
	unexpected print format may result.
Example	The following sample illustrates elongated character printing.

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