Memory Entry Commands - Control Data Corporation CYBER 170 Series Operator's Manual

These commands are generally used only by site
analysts for debugging purposes •. Do not enter
either command unless specifically directed.
In
addition, do not enter these commands if the
system has automatically set step mode because
of a power failure or abnormal environmental
condition (refer to SIC Register Error Detection,
appendix F).
UNSTEP.
Clears step mode. This command clears the
effect of any format of STEP command. Unlock
the console before entering this command (refer
to UNLOCK command). Depending on current
syntax overlay residency, you may have to enter
the
99
command before entering the UNSTEP.
command (refer to
9.9
command description).
IT
the system has set step mode because of a main
power failure or abnormal environmental
condition (refer to SIC Register Error Detection,
appendix F), do not enter this command until the
conditions that caused the automatic setting have
again become normal.
BLITZ.
99.
Drops jobs at all control points except subsystems
(queue priority is greater than MXPS+l). The
command n.DROP. performs the same function
for a job at an individual control point (refer to
Job Processing Commands). To ensure proper
idledown, terminate the subsystem with the
n.IDLE command after entering the BLITZ
command. To resume job processing after
entering BLITZ, enter the AUTO or
MAINTENANCE command. Do not enter the
BLITZ command unless specifically directed to
do
so. Unlock the console before entering this
command (refer to UNLOCK command).
Disables or enables syntax overlay processing and
logging of DSD commands in the system
dayfile/error log. That is, depending upon current
status, . syntax overlay processing and logging are
reversed.
When syntax overlay processing and logging of
DSD commands is disabled, DSD does not check
syntax. Disable overlay processing and logging
only when the system is in abnormal state to
prevent PPs from being requested when they
cannot perform the necessary tasks (for example,
when a system disk channel is hung). A
99
command which enables logging will be logged
itself, but a
99
command which disables logging
will not be logged.
This command is normally used only by the site
analyst for debugging purposes. Do not enter this
command unless you are given specific
instructions concerning its use. When the system
is in abnormal state, the commands which require
entry of the
99
com mand depend on which syntax
overlays for DSD are currently in central memory.
MEMORY ENTRY COMMANDS
The following commands are used to change the contents of
central memory and ECS. Either absolute locations or
those relative to a control point may be changed.
Character values or numeric data can replace the current
word contents. Either one 12-bit byte or 60 bits can
be
changed. A single byte can be changed by inserting the
byte number after the location; bytes are numbered 0
through
4
from left to ,right. The address and contents are
assembled right-justified with leading zero fill. Leading
zeros may be omitted in the entry. Finally, the console
keyboard must be unlocked to change memory under DSD
(refer to UNLOCK command).
.f
CAUTION
I
Do not enter any of the following memory
entry commands unless explicitly directed
to do so.
These commands are typically used only by the site
analyst. Extreme caution must be observed when using
these commands to avoid damage. to the system or to user
jobs. Again, the console must be unlocked in order to enter
any of the memory entry commands. Formats and
descriptions for these commands are as follows:
aaaaaa,yyy ••• yyy.
or
aaaaaa±yyy ••• yyy.
Changes the contents of absolute memory location
aaaaaa to yyy ••• yyy (20 digits). The second form
'of the command performs essentially the same
function but is used when it is necessary to change
successive memory locations.
t
aaaaaa,b,yyyy •
or
aaaaaa±b,yyyy •
Changes the contents of byte b at absolute
memory location aaaaaa to yyyy. Note that each
location consists of five 12-bit bytes, numbered 0
through
4
from left to right. The second form of
the command performs essentially the same
function but is used when it is necessary to change
successive memory locations.
t
aaaaaa,Dyyy ••• yyy.
or
aaaaaa±Dyyy ••• yyy.
Changes the contents of absolute memory location
aaaaaa to display code characters yyy ••• yyy
(left-justified and zero-filled). The second form
of the command performs essentially the same
function but is used when it is necessary to change
successive memory locations.
t
I
t
IT
the + sign is specified, the address is incremented by one location (aaaaaa+l) after the initial entry is processed; the -
sign causes the address to be decremented by one location (aaaaaa-l). This allows immediate entry for the next (or
previous) memory location. If the message REPEAT ENTRY is displayed above the entry, the yy •.• yy field is not cleared
and can be entered in successive memory locations as many times as desired by pressing CR. This repeat entry mode is
enabled by pressing CR before initial entry of the command.
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