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System!370 Model 168
Source: GC38-0030 System/370 Model 168 Operating Procedures
Power-On Procedure
DANGER: Before turning on the system, check all peripheral units externally. Do not
mount tape reels until after power·on.
1.
Press POWER ON (turns red).
2.
Wait about one minute until POWER ON turns white.
3.
If the manual light does not turn on after approximately two minutes,
follow this procedure:
a.
Set RSDT/NON RSDT to RSDT.
b.
Set FILE SECTION SELECT to
o.
Press LOAD MD. The manual light should turn on within one minute.
Power-Off Procedure
Before initiating the power-off sequence, issue Write log and Halt commands. If manual
light is not on, press STOP; the manual light will come on. Perform "Two-Channel
Switch procedure" if applicable.
1.
Check all tape units. Place units in unload state by pressing RESET and
LOAD REWIND. After rewind is completed, press UNLOAD on each tape
unit. Press RESET to shut power window.
2.
Check all disk drives. Place drives in unload state by switching to STOP on
each disk drive that is running. (DiSK drives must
be
individually turned off
!Jefore power is turned off.;
3.
Press POWER OFF. Power is sequenced down automatically. POWER ON
light goes off.
4.
Continue power-off procedures fo' peripheral equipment not connected to
the power-off sequence.
To IPL
1.
Set LOAD UNIT switches to SYSRES volume address.
2.
Press ENABLE SYSTEM CLEAR and LOAD simultaneously. Pressing these
pushbuttons starts IPL, but first clears storage. Manual light goes off, LOAD
light comes on, and system reads in the IPL program
3.
When LOAD light goes off, IPL operation is successfully completed.
4.
Reply to system messages and set TOD clock.
Loading a Secondary Nucleus (OS)
Follow the procedure shown for the Mod 165, using either the PR-KB or the light
pen.
To Display Genaral Registers
1.
Press STOP. Manual light comes on.
2.
Set CRT MODE SELECT to CE
3.
Set STORAGE SELECT to GEN PUR.
4.
Set MANUAL ENTRY SELECT to MCAR.
5.
Press cursor advance key
=>
until the cursor underscores the first (high-order!
byte in MCAR.
6.
Enter two hex digits (to select desired register) by pressing
t~e
data keys.
Use 00 to OF for 16 general registers.
7.
Press DISPLAY. The contents of the addressed genera! register are displayed
on the CRT in the right half of the MCDR.
B.
Restore CRT MODE SELECT to OP.
9.
Press START to resume processing.
Page 3·18
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