System Control Panel - HP 3000 III Series Manual

System Verification and Troubleshooting
PF/ARS PANEL CPU
DSBL ENBL DSBL EN BL RESET
NOTE:
1. SWITCHES LOCATED BEHIND FACEPLATE.
2. PLACARDING LOCATED ON REAR COVER PLATE
OF SYSTEM CONTROL PANEL.
CURRENT INSTRUCTION REGISTER
.1 • • • 1• • • 1• • • 1• • • 1• • •
o
1 2 3 4 5 6 7 8 9 10. 1 t 12 13 14 15
SYSTEM SWITCH REGISTER
• •
.1 • • • 1• • • 1• • • 1• • • 1• • •
o
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
BBBBBBBBBBBBBBBB
Figure 3-1. System Control Panel
DUMP - - ENABLE
All front panel switches are three-position, spring-return, rock-
er switches with a center-off position. To perform a specific
operation, press either the top or bottom half of the appropriate
switch as indicated by the placarding. wnen released, the switch
will return to its center-off position. The switches and lamps
shown in Figure 3-1 are identified and described in table 3-1.
In addition to the switches described in table 3-1, there are
three switches locted behind the upper-right corner of the panel
that are accessible when the cabinet door is opened. See figure
3-1. 'rhe CPU RESE'1' sw itch is a two-posi tion, spr ing-return
switch that resets the CPU circuits. The PANEL DSBL/ENBL switch
is a two-position switch that disables or enables the System Con-
trol Panel for use. The PF/ARS DSBL/ENBL switch is a two-posi-
tion switch that disables or enables the auto restart program in
the event of a power failure.
Table 3-1. System Control Panel Switches and Lamps
1-- - - _._.- -
~"-------'--1'--'---------'------'----'------'----'-
I
Panel Mar king
I
Function
I I
--------._._--'"_._--_._-----_._-- -_._----_._-----_.-
----_._---_._-_._--._-----_._---._._--
CURRENT INSTRUCTION
REGISTER (lamps)
SYSTEM SWITCH REGISTER
(lamps and switches)
RUN (lamp)
Displays the contents of the CIR.
Displays the contents of the Switch
Registe r as de te rm ined by press ing
the switches on or off. Switches
provide a 16-bit word to be used as
a device number and control byte
for cold load proced ure.
Indicates the system is executing a
progr am.
3-3