Control Data Corporation CYBER 170 Series Operator's Manual page 281

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GLOSSARY
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Address
The location of a word in memory. The location is
designated by number or symbolic name.
Auxiliary Device
A mass storage device that is not part of a permanent
file family. Auxiliary devices can. contain direct or
indirect access permanent files.
Breakpoint
A point where a program can be interrupted by a
monitor routine to permit analysis or debugging.
Buffer
An intermediate storage area used when transmitting
data between central memory and an I/O device.
Channel Number
The number of the data channel on which a peripheral
device controller can be accessed.
Coldstart
A procedure used to deadstart if the tape or disk
controller has not yet been loaded with controlware or
the controlware is not running.
Common Testing and Initialization (CTI)
A common deadstart process that resides on the
deadstart file and the maintenance system library.
Communications Supervisor (CS)
A program that coordinates the network-oriented
activities of one host computer and of the lines and
terminals logically linked to it.
Control Point Number
The number of the control point to which a job is
assigned, while the job resides in central memory. The
actual number of control points is an installation
parameter. Before the job can execute, each central
processor program must be .assigned to a control
point. Control points zero and n (the last control
point) contain system parameters and pointers, and
perform system functions.
Controller
A hardware device that connects channels to
peripheral devices. For example, a tape controller
might connect up to eight tape units to one channel.
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Control ware
A special type of software that resides in a peripheral
controller. The control ware defines the functional
characteristics of the controller.
CYBERLOG
The program initiated. after deadstart that requests
data about the event that caused the need for a new
deadstart.
Data Channel
One of the nine to 24 channels (12-bit) by which
information passes between the peripheral processors
and peripheral devices.
Dayfile
A chronological file, maintained on a mass storage
device, which forms a permanent accounting and job
history file. Dayfile messages are generated by· your
action or by the system when control statements are
processed or other significant action occurs. A portion
of the most recent system dayfile is displayed at the
console; a copy of the job dayfile is printed with the
output for each job. .
Deadstart
The process of initializing the system by loading the
operating system library programs and any of the
product set from magnetic tape or· disk. Deadstart
recovery is reinitialization after system failure.
Deadstart Sequencing
The execution of a selected set of commands before
normal system job scheduling is enabled.
Default Value
A fixed value supplied by the system for a missing
parameter.
Direct Access File
A permanent file that is accessed and modified
directly without making a temporary copy.
DIS (Job Display)
A system peripheral processor program similar to
system display (DSD) that provides communication
between a job in central memory and the operator at
the console, and permits you to control execution of
the program through the console keyboard.
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