IBM 6400 Series, Setup Manual

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Appendix E
PMPP Physical Maximum Print Position. The longest line teh
printer is capable of printing. This differs from MPP in that
the printer may be capable of printing lines 132
characters wide (PMPP), but the print job is only 80
characters wide (MPP). See also
MPP .
point A unit of length in printing and typography, used to
specify type sizes, heights of font characters, etc. There
are 72 points in a vertical inch; thus, one point equals 1/
72 inch, or approximately 0.0139 inch. Some examples
of point sizes are:
This is 8 point type.
This manual is printed
in 10 point type.
This is 14 point type.
POR Power On Reset
port A channel used for receiving data from or transmitting
data to one or more external devices.
portrait Printed parallel to the paper motion.
print mode Font
proportion, character
See character proportion .
proportional See font, proportional .
protocol The rules and conventions that govern communication
between a printer and a host computer. A protocol
includes codes for printing text and graphics and codes
instructing the printer to perform special operations. See
also
compatibility and emulation .
RAM Random Access Memory. Can be read from or written to
at any time. RAM is volatile; whatever information is in
RAM is lost when power is removed or interrupted.
RD Receive Data
read To retrieve data from memory or from mass storage
(hard disk, floppy diskette, etc.)
Ready mode Online. The printer is ready to receive and process
commands and data.
reset To turn off, deactivate, disable, or return to a previously
determined state.
resolution A measure expressing the number of component units in
a given range used to create an image in print.
Expressed as the number of dots per inch (dpi)
horizontally and vertically.
ROM Read Only Memory. Programs, instructions, and routines
permanently stored in the printer that cannot be written
to. Information in ROM is not lost when power is turned
off. (ROM-resident fonts are fonts permanently stored in
a printer and available at any time via software
commands to the printer.)