Context Switching; Compressed Data Formats - QMS 1660 Getting Started

Simultaneous Interface Operation (SIO)
Although many other printers have multiple interface ports and auto-
matically designate a "hot port," only one port actively receives data
at a time. Your QMS 1660 Print System is unique because SIO allows
all of its interface ports—LocalTalk, Centronics IEEE 488/1284 paral-
lel, serial, and up to two optional network interfaces—to be active at
the same time.
User Benefit—You can have more than one computer printing to the
printer. Each interface has an input buffer (which may be expanded
with additional memory) that receives data while another interface is
being used to print.
Emulation Sensing Processor (ESP) Technology
Most printers can recognize only their native command language.
However, using a form of artificial intelligence, ESP technology ana-
lyzes incoming file data from any of the printer's interfaces, selects
the appropriate emulation from those installed on the printer, and pro-
cesses the print job.
User Benefit—When your printer is in ESP mode, you can easily
print PostScript, HP PCL 5, HP-GL, and Lineprinter documents with-
out changing printer switch settings or sending software commands
to accommodate different printer languages.

Context Switching

After its initial use, the state of an emulation and downloaded data
(such as fonts, macros, and overlays) is preserved for as long as the
printer power is on.
User Benefit—Repetitive downloading of emulations, fonts, macros,
and overlays is unnecessary.

Compressed Data Formats

Crown printers convert data received from the input buffers into
intermediate, compressed blocks until the data is needed for printing.
These compressed blocks of data are designed to be processed
Introduction
Printer
Features
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