Справочник Пользователя для IBM QMS 4525
Crown
Multitasking
Multitasking
QMS 4525 Print System User's Guide
2-24
Set paper size override
%%IncludeFeature: paper_size_override
Wrap long lines
%%IncludeFeature: autowrap
PostScript Emulation
Function
Command
Select PostScript level
%%IncludeFeature: languagelevel
Default dither
%%IncludeFeature: defaultdither
Session Commands
Function
Command
*Session %%Session:
*Start New Layout
*Start New Layout
%%IncludeFeature: newlayout
Crown Multitasking
The QMS 4525 features the QMS Crown multitasking printer operat-
ing system. The following sections describe this architecture and the
advanced features it provides.
ing system. The following sections describe this architecture and the
advanced features it provides.
Most printers are single-task oriented: they must finish printing one
page in a document before they can begin processing the next page
or an entirely new print job. QMS Crown architecture, on the other
hand, employs a multitasking scheme that allows the printer to accept
and process subsequent pages or new print jobs while the printer is
printing another page or document.
page in a document before they can begin processing the next page
or an entirely new print job. QMS Crown architecture, on the other
hand, employs a multitasking scheme that allows the printer to accept
and process subsequent pages or new print jobs while the printer is
printing another page or document.
A typical printer converts transmitted print data into a raster image,
one page at a time, using the appropriate printer language. This ras-
ter image is stored in the printer's memory as a bitmap image until the
printer controller sends the bitmapped image to the print engine for
printing. Due to memory restrictions, a limited number of bitmap
images may be stored in RAM simultaneously. A page must be
printed, and memory released, before the printer can begin to raster-
ize a new page. The result is relatively slow print performance while
the host waits for the printer to accept new print data.
one page at a time, using the appropriate printer language. This ras-
ter image is stored in the printer's memory as a bitmap image until the
printer controller sends the bitmapped image to the print engine for
printing. Due to memory restrictions, a limited number of bitmap
images may be stored in RAM simultaneously. A page must be
printed, and memory released, before the printer can begin to raster-
ize a new page. The result is relatively slow print performance while
the host waits for the printer to accept new print data.
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