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4635 LPS SOFTWARE COMPONENTS
During this process, some or all of the existing system files
on the system disks are replaced with new files; user files are
not affected.
• In a full sysgen, a new operating system is built on empty
system disks; that is, new or used disks that have been
cleared and formatted prior to sysgen.
Complete instructions for each of these sysgens are contained in
the Xerox 4635 LPS System Generation Guide.
The UI Software consists of two 3.5-inch floppy diskettes (one
supports the system UI Software, and one supports the UI
Dialog). The Printer Software also consists of several 3.5-inch
floppy diskettes. Refer to the “System software functional
description” section for further information on the System UI
Software, UI Dialog, and Printer Software.
Operating System Software functional description
The LPS OSS, or system controller, runs both background and
foreground processing. All Xerox LPS systems are run by
basically the same software. The OSS is delivered for installation
and sysgen on 9-track magnetic tapes, and 18-track or quarter-
inch cartridge tapes. The major utilities or “tasks” run by the
system controller are shown in their hierarchical relationships in
the chart below.
Figure 4-1 illustrates the hierarchy of the major LPS processing
tasks. Following the figure is an overview of each task.
Figure 4-1. Major LPS processing tasks
Operating System Executive (OSEXEC)
File Control Program (FCP)
Operator Communication Subsystem (OCS)
Utilities Editor FDL Processor
Diagnostics Font Editor PDL Processor Output
Input
Host Interface Processor (HIP)
DJD IPD RPT
4-2 XEROX 4635 LASER PRINTING SYSTEM PRODUCT REFERENCE