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ROM
Read Only Memory. The portion of the printers memory that is
permanent. The printer uses the information in the ROM, but the
information cannot be changed.
SLCT-IN
For most application programs, and most uses, the SLCT-IN setting
should remain Valid. This means that the printer cannot be
deselected or reselected by the DC1 or DC3 control codes (see
Appendix A for further explanation). If its set to Invalid, the printer
can be deselected or reselected by DC1 or DC3.
Self
test
A method of checking the operation of the printer. When the self test
is turned on, the printer prints the characters that are stored in its
ROM.
Serial interface
An interface is the connection between the computer and the printer.
There are two types: a serial interface transmits data one bit at a time.
and a parallel interface transmits data one character or code at a time.
Subscript mode
Prints characters about twothirds of the normal height in the lower
part of the character space.
Superscript mode
Prints characters about twothirds of the normal height in the upper
part of the character space.
Top of form
A setting that enables the printer to begin printing in the proper place
and to advance the paper correctly when it receives a form feed.
Tractor
The part of the printer that moves continuous-feed paper through the
printer.
10 pitch
A pitch with 10 characters per inch. Also called pica. This is often the
standard or default character width.
12 pitch
A pitch with 12 characters per inch. Also called elite.
GL-8
Glossary