Control Data Cyber 170 Series Operator's Manual page 38

Option
P
S
2-26
Description
.. PP 0 Display. This option temporarily changes the deadstart function
from system to maintenance deadstart. The maintenance task performed
displays the contents of PPU 0 (zero) memory on the console screen.
This option is generally used by the site analyst or customer engineer (CE)
to enter sample PPU programs (for example, to test peripheral devices
on the system).
When this maintenance task is completed, simply activate the deadstart
switch again. The options display reappears and additional options can
then be selected.
Select Diagnostic Options. This option changes the deadstart function
from system to hardware maintenance deadstart. The S option is, available
to select tests which determine the reliability of central memory, PPUs,
and the hardware.
The deadstart options display is replaced by the following display.
DIAGNOSTIC OPTIONS·
E EXCH JMP TST-DISABLE CJ/MJ.
M CENTRAL MEMORV TEST·
P PPU MEMORV TEST·
The operator may select anyone option by entering the corresponding
character on the console keyboard.
Option
E
Description
Exchange Jump Test •. The maintenance task performed
tests the exchange jump package to determine the
reliability of the hardware.
NOTE
The exchange jump test alters the
contents of central memory. Thus,
a level 3 recovery deadstart cannot
be performed if this option is selected.
Prior to selecting this option, CEJ /MEJ must be disabled.
When E is entered, the deadstart options display is re-
placed by the exchange jump test options display. This
display provides options for testing the exchange jump
package.
When this maintenance task is completed, CEJ /MEJ should
be enabled. Then simply activate the deadstart switch again.
The options display reappears and additional options can be
selected.
60435600 A