Printronix P7000 Programmer's Reference Manual page 97

point
POR
port
portrait
Postnet
print mode
protocol
PSA
RAM
RD
read
Ready mode
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 0.0138 inch.
Some examples of point sizes are:
This manual is printed in 10 point type.
point type.
Power On Reset.
A channel used for receiving data from or
transmitting data to one or more external devices.
Printed parallel to the short edge of a page.
A bar code standard defined by the United States
Postal Service.
Synonym for print attribute. Includes character
attributes such as italic, underlining, super/subscript,
as well as Draft, NLQ, and DP.
In general, a set of rules governing the exchange of
information between computer systems. For printers,
a protocol is the coding system used to convey and
print characters and graphics. A printer protocol
includes character codes, printer function codes, and
machine-to-machine communication codes. In this
manual, protocol and emulation mean the same
thing. See also compatibility and emulation.
Printronix System Architecture. A print engine design
that puts all data and electro-mechanical control logic
on one circuit board. The use of flash memory on this
board permits rapid access to stored printer
emulations and fast processing of print data.
R
Random-Access Memory. Also called "main
memory" or "working memory," this is the active
memory of a printer, into which programs are loaded.
This memory can be read from or written to at any
time-hence the term "random-access." RAM is also
termed "volatile" because whatever is in RAM is lost
when power is turned off or interrupted. See also
ROM.
Receive Data. Serial data stream to the printer.
To retrieve data from memory (RAM, NVRAM) or
mass storage (hard disk, floppy diskette, etc.).
Online. The printer is ready to receive and process
commands and data.
This is 8 point type.
This is 14
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