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Nee
Prime Proprietary
Operating Instructions
3.6.1.13 Stopping Execution of a Program
l.
Enter CP mode and stop the process.
ESC ESC
CP> STOP
2.
Type "RUN" or "RCP" to continue execution of the
program
at
the
point
of
halt (provided you did not change the program counter).
3.6.1.14 Exiting Control Panel Mode
The following commands are used to exit CP mode:
@
MO ST - Enters Supervisor Terminal (ST) mode from CP mode.
e
MO ZCD
-
Enters
the
280
debugger.
The
debugger
is
a
troubleshooting
tool;
this
command
should
not
be used by
non-trained personnel.
3.6.2 SYSTEM TERMINAL (ST) MODE
This mode is the
standard
system
(supervisor)
terminal
operation.
After the system has successfully Master-cleared and a BOOT command is
issued,
the
VCP
awaits
the standard PRIMOS commands.
To exit from
System Terminal Mode and enter CP mode, type ESC ESC.
3.6.3 ZCD MODE
ZCD mode is intended
to
be
used
ONLY
by
Prime
hardware/software
specialists
or
trained
personnel
to
debug
the
VCP at the Repair
Center.
,
3.7 MULTI-STREAM PROCESSOR MULTI/UNI OPERATION
The 850 processor is two 750 CPUs managed by a Stream
Synchronization
Unit (SSU) board.
A set of DIP switches and four LED's are mounted on
the
rear
of
the
SSU.
Two
of
these
switches
control MULTI/UNI
operation, and are duplicated on the front bezel panel of the
system.
Switch
#2 controls MULTI/UNI mode logic.
When this switch is on, the
system is forced into UNI mode (only one CPU operating).
The
active
CPU
is selected by switch #3.
If switch #3 is off, the bottom CPU is
active;
if on, the top CPU is active.
Switch #4 selects the type of memory the SSU should
respond
as.
Tf
this
switch
is
off, the SSU responds as an extended E6 memory which
forces a short memory cycle on the system.
The SSU may be debugged by
a 750/850 CPU using APT].
To run in this mode switch #4 can
be
set,
which forces the SSU to respond as an E6 memory.
Switch
#5 should normally be off to allow normal operation or testing
of the SSU.
When this switch is on, the SSU is disabled and will
not
respond to any memory references.
Table 3-11 shows a summary of these switch settings.
3
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25
070-C
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