System/370
Model
195
Source: A22-6954 Systeml360 and Systeml370 Model 195
Operating Procedures
Power-On Procedure
DANGER: Before turning
on
the
system, ensure
that
no person
is
exposed
to
risk and
check
all
peripheral units externally. Check
that
doors are properly closed, feeds
not
impeded, and paper and card supplies suitable
to
permit power-on sequencing.
1.
Check panel light coolant check
or
coolant water temperature gage for
normal setting before power-on sequence.
2. Press POWER
ON
(operator control panel);
the
backlighted key should
turn
red immediately.
3.
At
the
completion
of
normal power-on sequence
(a
matter
of
seconds),
the
POWER
ON
backlight turns white. If, after
90
seconds, POWER
ON
does
not
light, check
to
see whether EMERGENCY PULL has been pulled.
Power-Off Procedure
Before performing
the
turn-off procedures, issue WRITELOG and HALT commands (if
using operating system). If manual light
is
not
turned
on,
press STOP; manual light
turns
on. Perform ''Two-Channel Switch Proc;roures" if applicable.
1. Check all tape units. Put them
in
unload state
by
pressing RESET and
LOAD REWIND. After REWIND
is
completed, press UNLOAD
on
each tape
unit and press RESET
to
shut
power window.
2. Check
all
disk drives. Put them
in
unload state
by
switching
to
STOP on
each disk drive if drives are running. (Disk drives must be individually
turne<:'
off
before power
is
turned off.)
3. Press POWER
OFF.
Power
is
sequenced down automatically. The power-)n
light
turns
off.
4. Continue power-off procedures for peripheral equipment
not
connected
to
the
power-off sequence.
Manual IPL
Manual IPL
is
performed after a power-on sequence, after malfunctions
that
.1ecessitate
reloading
the
resident portion
of
the
operating system (control program)
into
main
storage, as part
of
switching from
one
operating system
to
another, or for initial load·
ing
of
any stand-alone program.
1. Place
the
program
on
the
desired I/O device and ready
that
device. (Check
that
CRT DISPLAY & TAPE OP
is
at
process. Check
that
lest
light
is
off,
unless a critical switch has been deliberately set
to
other
tban nonmal posi-
tion.)
2. Set
the
three
LOAD UNIT switches
to
the
I/O address required.
3.
If
the
installation does
not
use
the
secondary nucleus,
go
to
step
4.
If
the
secondary nucleus
is
used, follow procedure
in
"Loa:ling
the
Secondary
Nucleus" as direct replacement for step 4.
4.
Press
LOAD. The
load
light
tlJr~s
on, the
ma"u2!
Hght'
tvrll~
off,
and
o:;v~tern
reset
occu~.
When
the
loader portion
of
the
prograrr
is
in
main storage,
the
load light turns off and control
of
the
system
is
passed
to
the channel,
which directs
the
storage
of
the
remainder
of
the
program.
5.
If
this
is a stand-alone program (independent utility: DASDI, DUMPI
RESTORE, or RECOVER/REPLACE), and it
is
loaded properly,
the
wait
light
turns
on. The
IC
reads FFCO. Type, for example, INPUT=2400
181
(where
2400
is
the magnetic tape device type, and
181
is
its hex address).
Hold down ALTN CODE key and 'press numHic 5 key. When
the
job
is
completed, the program prints
out
END
OF
JOB
and
ente~
the
wait state.
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