IBM 4400 manual Graphics, Standard Density, Form Feed

Form Feed

Form Feed

ASCII Code FF

Hex Code 0C

Dec Code 12

Purpose Prints the data in the buffer, if any, then moves the paper to the top of the next form.

Comment The logical print head moves to the left margin. This code cancels all one-line-only emphasis and font controls: double- wide from SO and ESC SO, and unidirectional printing from ESC <.

Graphics, Standard Density

ASCII Code ESC K n1 n2

Hex Code	1B 4B n1 n2
Dec Code	27 75 n1 n2
Purpose	Selects normal density bit image graphics of 60 dots per inch
	horizontally and 72 dots per inch vertically.
where:	(n1 + 256n2) defines the number of data bytes to follow.
	DATA = ASCII characters for the dot pattern bytes.

NOTE: The DATA can be expressed in a format with the appropriate decimal values of the ASCII characters supplied, especially in cases where the dot patterns of nonprintable characters are required.

“DATA” consist of 8-bit dot columns, with the MSB at the top, and “1” bits producing dots. For more information, refer to Chapter 8, “Graphics.”

Comment You can change graphics density with the ESC ? command.

Example The following example produces a pattern of standard density bit image graphics. The 9 data-bit pattern is repeated 27 times. Compare this example to the double density and quadruple density examples.

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