Xerox 560 Reference Manual page 166

ZCfJlMl
SET/CLEAR REPEAT CLOCKING MODE
This command may be used either to SET REPEAT CLOCKING
MODE or to CLEAR REPEAT CLOCKING MODE. When the
Repeat Clocking Mode is set, system clocks are repeatedly
issued to the system.
If
the Display Inhibit Mode, as described below, is also
set, the clock rate during Repeat Clocking Mode is approx-
imately 1600 Hertz.
If
the Display Inhibit Mode is not set
(cleared), the clock rate is determined by the communica-
ti ons frequency of the System Control Consol e.
The amount of information displayed when the Repeat
Clocking Mode is set is also dependent upon the Cluster
Display Mode. If the Cluster Display Mode (see Z C MM2
command) is not set, the contents of the selected Single-
Clock Status Register is displayed after each clock.
If the Cluster Display Mode is set, the contents of all
16 SCSRs within a selected cluster are displayed after
each clock.
The above display routine is interrupted during a ZC format
command. This mode is cleared by a CLEAR REPEAT CLOCK
MODE, Z C MM1, a CLEAR MM FEATURES, ZCMMO, or a
SUPER RESET, ZCMM4, command.
Z~M2
SET/CLEAR CLUSTER DISPLAY MODE
This command may be used either to SET CLUSTER DISPLAY
MODE or to CLEAR CLUSTER DISPLAY MODE. When
the Cluster Display Mode is set, any console operation
which causes the display of a Single-Clock Status Reg-
ister (e. g., ZCCLK, ZCMM 1, ZCEIIII, ZCCIIII, ZCKIL,
or
II~II
during Single Clock Mode) will cause the con-
tents of all SCSRs in the selected cluster to be displayed
in successi on.
If the Cluster Display Mode is set, it may be reset by a
CLEAR CLUSTER DISPLAY MODE, ZCMM2, a CLEAR MM
I::C ATIIOCC'
,CAAAA" ___
C'IIDCD DCCCT
,CAAAAA ______ ..1
I-L/"'\I VI\L..J,
L-
IYIIYIV, UI U .JUI LI\ I"L.JLI, L- IYlJvr-r,
~VIIIJIIUIIU.
Z~M3
SET/CLEAR P-MODE REPEAT MODE
This command may be used either to SET P-MODE REPEAT
MODE or to CLEAR P-MODE REPEAT MODE.
When the P-Mode Repeat Mode is set, any P-Mode func-
tion character (see
II
Diagnostic Control Commands ll
)
en-
tered from the control console is automatically repeated
following each line of display. The repetition of P-Mode
functions is haited by entering any character whiie repeti-
tion is active. Repetition is automatically resumed when
another function is entered.
The P-Mode Repeat Mode may be reset by a CLEAR P-MODE
REPEAT MODE, ZCMM3, a CLEAR MM FEATURES, ZCMMO,
or a SUPER RESET, Z C MN't4, command.
160 Control Commands
The P-Mode repeat feature is particularly useful for scan-
ning through sequential memory locations or
Q
registers
(using the INCREMENT REFERENCED ADDRESS AND
DISPLAY command or INSTRUCTION SINGLE STEP com-
mand described under
II
Diagnostic Control Commands
H
) .
Z~M4
SUPER RESET
The primary application of the SUPER RESET command is to
restore the system to a predetermined condition during and
following maintenance activities. The SUPER RESET com-
mand is accepted and executed only if the MAINT MODE
switch on the SCP is in the ON position. Entering a SUPER
RESET command when the system is not in the maintenance
mode results in an error message without affecting the
system.
If a SUPER RESET command is accepted, all reset signals
(System, I/O, and BP) are issued. In addition, the ECS
is reset and initialized, and the basic processor executes
an initializing routine which clears the contents of the
Q scratchpad prior to executing a normal reset.
After a SUPER RESET command is executed, the system
remains in the IDLE state, and the ECS is automatically
placed in P-Mode.
Z~M5
SET MICRO-DIAGNOSTIC LOOP MODE
This command allows maintenance personnel to repetitively
loop the micro-diagnostic test of a single system element.
The operator must ensure that the system is in the IDLE state
prior to entering this command.
This mode may be cleared by either a SUPER RESET,
ZCMM4, or a CLEAR MM FEATURES, ZCMMO, command.
Z~M6
INITIATE ELEMENT MICRO-DIAGNOSTIC
This command causes a single element micro-diagnostic test
1._
L_ :_: ..
:_1._..1
t: __ LL ___ 1 __
1._..1
C: __ I_r"I __ LC .. _ .... __ 1 _____ ..
IV IJI;; 1I1111UII;;U IVI 1111;;
;)I;;II;;~II;;U
.JllIl:::Ill;; ....
I~".JIUIV;)
1::11::1111::111,
even if the system is in Single Clock Mode. The operator
must ensure that the normal preconditions of micro-diagnostic
test execution provided in the LOAD NORMAL sequence
are met. This may be accomplished by the following com-
mand sequence:
CLEAR SINGLE CLOCK MODE (enables clocks for
reset)
SYSTEM HALT (system must be in IDLE state)
RESET SYSTEM (test must be preceded by a system
reset)
SELECT/DISPLAY SINGLE CLOCK STAfUS REGlSrEI{
SET SINGLE CLOCK MODE
INITIATE ELEMENT MICRO-DIAGNOSTIC
SELECT/DISPLAY SINGLE CLOCK STATUS REGISTER
SINGLE CLOCK STEP (step-through sequence)