Negative Motion Command

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Negative Motion Command

The Negative Motion command specifies whether negative motion
will be used, thus determining whether the full page must be buffered
before printing can begin.

?

&a#N

If the page contains no negative motion, using the

?

&a1N command

increases print speed.

Negative motion includes:

• Vertical motion toward the top of the page

• HP-GL/2 operations

• Print directions other than 0 degrees

• Landscape text

• When the top of the character cell on the next line is above the

top of the character cell on the current line

The default value of 0 delays printing until all the processing of input
data for a page is complete. This is for software that needs to
compose the data before printing.

A value of 1 allows data to be printed as received, rather than first
stored in a buffer. Otherwise, printing will be delayed until all
processing of input data is complete.

Note

This command must be sent before any printable data is received by
the printer.

# =

0

- Picture contains negative motion (page formatting

printers)

1

- Picture contains no negative motion (swath printers)

Default

= 0

Range

= 0, 1

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2-90 Printer-Specific Differences

ENWW