Xerox 721P85530 用户手册
OVERVIEW
XEROX DOCUPRINT 180 LPS PDL REFERENCE
1-5
PDL related programs and tasks
This section lists the programs and tasks most important to PDL.
Operating system executive task (OSEXEC)
The operating system executive (OSEXEC) task is always running. It
interfaces with the LPS hardware and logs hardware errors. In
addition, it queues devices, manages resources, establishes priority
for software tasks, and schedules processing.
interfaces with the LPS hardware and logs hardware errors. In
addition, it queues devices, manages resources, establishes priority
for software tasks, and schedules processing.
File control program (FCP)
The file control program (FCP) manages disk resources. It manages
and allocates all disk space, creates all disk files, and accesses disk
files.
and allocates all disk space, creates all disk files, and accesses disk
files.
Operator communication subsystem (OCS)
The operator communication subsystem (OCS) task acts as an
interface between the operator and software tasks. OCS receives
input from the operator and displays messages to the operator. OCS
also interfaces between system tasks.
interface between the operator and software tasks. OCS receives
input from the operator and displays messages to the operator. OCS
also interfaces between system tasks.
Editor task
The editor task creates and modifies disk files. It uses a temporary
work file and stores the contents of the work file permanently on disk
when you save the file. It sends files to print and directs CMD files to
execute.
work file and stores the contents of the work file permanently on disk
when you save the file. It sends files to print and directs CMD files to
execute.
Font editor task
The font editor task creates and modifies font files and allows you to
tailor fonts within a font file to meet the needs of each print job.
tailor fonts within a font file to meet the needs of each print job.
Input processing task
The input processing task reads in job parameters (JDL file), creates
a job control block, reads data, and handles job messages to the
operator. Then the input processing task does the following:
a job control block, reads data, and handles job messages to the
operator. Then the input processing task does the following:
•
Unpacks and converts the data
•
Selects and deletes blocks or records
•
Records any special processing instructions (for page offsets,
DJDE records, CMEs).
DJDE records, CMEs).