Specifications
If the Break Enable/Disable Switch Is Enabled
If
break
is
enabled,
the
console program
enters
console I/O mode
in
response
to
any
halt
condition except
the
HALT instruction, including system power-
up. Console
I/O mode allows you to control
the
system
by
typing commands
at
the
console
terminal.
CAUTION: Do not press the Restart button while
in
console mode. Doing
so
destroys the system state.
You
will not
be
able to continue normal operation.
You
can
direct
the
system to boot a specific device
when
in
console I/O mode.
Use
the
BOOT command, followed
by
the
device
name
as
listed
in
Table
1-1.
For
example, to boot from
the
TK70
tape
drive,
issue
the
command BOOT
MUAO.
Typing
HELP
at
the
console prompt displays a
list
of all console commands.
For
a complete description of
the
console commands, refer to
the
KA640
CPU
Module Technical Manual.
1.1.3 CPU Cover Panel Operation
The
CPU
cover
panel
covers
the
CPU
and
first memory module
in
slots
1
and
2.
The
panel
contains controls for
the
CPU
and
connectors for
the
console
terminal
and
for
Ethernet
cables.
Two
Ethernet
connectors
are
provided: one for
standard
transceiver cable
and
one for
Thin
Wire cable.
The outside
of
the
CPU
cover
panel
contains
the
following components,
as
shown
in
Figure
1-1.
•
Break
EnablelDisable switch
• Power-Up Mode switch
• LED display
• Modified
modular
jack
(MMJ) for
the
console
terminal
serial line
unit
(SLU)
•
Ethernet
ports:
One BNC-style connector for
Thin
Wire cable
One 15-pin connector for
standard
Ethernet
transceiver
cable
The
inside of
the
cover
panel
(shown
in
Figure
1-2)
contains:
•
Baud
rate
switch (discussed
in
the
next
section)
•
Battery
backup
unit
(BBU) for
the
time-of-year clock
and
language
selection (see
Section 1.1.2.4)
Base System Specifications
1-5