Selecting The Cmrdeck - Control Data Cyber 170 Series Operator's Manual

Value of yyy
000
001
010
all
Associated Function
Selects automatic system deadstart. If system device is specified in word
14 (refer to Entering Word 14). deadstart proceeds automatically; operator
intervention is not required unless an error status bit is set in a status /
control register (CDC CYBEH 170 Series only) or an error is detected during
the memory confidence test. For complete information concerning auto-
matic system deadstart. refer to the procedure described later in this
section under System Deadstart :procedures.
Selects system deadstart with options displayed. When this function is
selected. an options display appears on the left console screen' and dead- ,
start proceeds as directed by the operator. For complete information
concerning system deadstart with options displayed. refer to the pro-
cedure described later in this section under System Deadstart Procedures.
Selects maintenance deadstart task that displays the contents of PPU 0
(zero) memory on the console screen. This function is generally used
by the site analyst or custorner engineer (CE) to enter sample PPU pro-
grams (for example, to test peripheral devices on the system). To per-
form another deadstart function, it is necessary to reset this field (yyy)
on the deadstart panel and activate the deadstart switch.
Selects maintenance deadstart task to perform deadstart dump. This
function allows the contents of ·PPU memory and/ or central memory to
be dumped to a specified line printer. Refer to section 3 in part II of
the Installation Handbook for deadstart dump procedures. To perform
another dead$tart function, it is necessary to reset this field (yyy) on
the deadstart panel and activate the deadstart switch.
During a system deadstart with options displayed (yyy=001 on· deadstart panel). some of the
options available are maintenance deadstart functions. Included are the maintenance functions
described here (PPU 0 memory display and deadstart dump). When either of these options
are selected via the deadstart panel switches (yyy). it is necessary to reset the switches in
order to perform anotper deadstart function. However. when these functions are selected
via the options display. it is not necessary to reset the deadstart panel to perform another
deadstart function. Simply activate the deadstart switch and the options display reappears.
Additional options can then be selected and/ or the system deadstart can be performed. Refer
to the procedure for system deadstart with options displayed for a description of the options
available.
SELECTING THE CMRDECK
The equipment configuration to be used for system operations is defined by CMHDECK
read from the deadstart tape. Up to 64 CMRDECKs can be included on the deadstart tape
(numbered 0 through 63). This provides an installation with the ability to select one of
several equipment configurations when the system is deadstarted. However. it is important
to note that the CMRDECK to be used is only selected during a level 0 (initial) deadstart.
Should it become necessary to perform a level 1. 2. or 3 (recovery) deadstart. the CMRDECK
selected during the most recent level 0 deadstart must be used. Refer to the discussion under
Entering Word 14 for information concerning the levels of deadstart.
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