Xerox DocuPrint 180 manual Operating system executive task, Operator communication subsystem

XEROX DOCUPRINT 180 LPS SOFTWARE COMPONENTS

Figure 4-1.Major DocuPrint 180 LPS PROCESSING TASKS

Operating System Executive (OSEXEC)

		File Control Program (FCP)
		Operator Communication Subsystem (OSC))
Utilities	Editor		FDL Processor			Input
Diagnostics		Font Editor	PDL Processor	Output	DJD	RPT
		Host Interface Processor (HIP)
Operating system executive task			The OSEXEC task is always running. It interfaces with the DocuPrint
			180 LPS hardware and logs hardware errors. In addition, it queues
			devices, manages resources, establishes priority for software tasks,
			and schedules processing.
	File control program		The FCP or FMS task manages disk resources. It manages and
			allocates all disk space, creates all disk files, and accesses disk files.
Operator communication subsystem			The OCS task acts as an interface between the operator and
			software tasks by receiving input from and displaying messages to
			the operator. OCS also interfaces between system tasks.

Diagnostic tasks The OSDS runs either under the OSEXEC task or from offline sources. It controls the processing for the PROBLEM command. Diagnostic support is also provided to your service technician by the stand-alone field engineering software (SAFES) task.

System utilities The DocuPrint 180 LPS has many utility programs which run under the OSEXEC task that provide maintenance services such as: backing up the system (DSR); tracking the unusable sectors on disks (FCHECK); assigning a maximum size to the working print file (REALLOCATE); eliminating wasted space on the disks (COMPRESS); and making used space available again (PURGE).

XEROX DOCUPRINT 180 LASER PRINTING SYSTEM PRODUCT GUIDE 4-3