HP 3000 III Series Manual page 117

System Verification and Troubleshooting
Table 3-2. Maintenance Panel Switches and Lamps (Continued)
I-----r---"~·_·--"----r·-----~-"-----"-"--------·-·---".-.-'"----~"_._-"---
IPanell Panel Marking Use
I
Row
I
I I
CMD DEV NO., display only. The I/O
command is displayed in positions 5
through
7;
the device number is in
positions 8 through 15. Positions 0
through 4 of the display do not light
100,
display only. Displays (via the
S-Bus) the contents of the IOD Input
Register.
lOP, display only. Displays the con-
tents of the
Da
ta-In Register.
I/O DATA, display only. Displays the
data on the
100
(0:15) bits. On the
lOP bus, the se bi ts are in "not" form;
however, the "not" bi ts are inverted
before display. Thus, there is no
overbar over the mnemonic.
I/O MAP, display only. To identify
the I/O Map bits, the I/O overlay
(part no. 30354-80012) is placed over
the REGISTER DISPLAY lamps.
PCLK, display only.
TEST, display only. Displays any 16
bits applied to J3 on the Maintenance
Pane 1 Inte r face PCA.
R RGTR, display only.
S RGTR, display only.
MEM ADRS displays the memory address
(Spa) in REGISTER DISPLAY (0:15), and
the ABS-Bank Registe r in B14 and B15.
This lamp is called MEM ADRS because
spa contains the address when memory
is accessed by means of the MEMORY
STORE or MEMORY DISPLAY switches.
---
----_._--
MEM DATA displays the memory data
(SP1) in REGISTER DISPLAY (0:15).
B14 and B15 will be zero. This lamp
is called MEM DATA because SPl re-
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