Service Request Switch Settings - HP 3000 Series Installation And Service Manual

Installation
Table 2-1.
Service Request Switch Settings
Service
Rocker Switch No.
Switch Block
Request
to be Closed
Location
No.
(closed
=
true)
(left or right)
SRO
Right
SRl
Right
SR2
Right
SR3 Right
SR4
Right
SR5
Right
SR6
Right
SR7 Ri ht
SRlO 3
Left
SRll 4 Left
SR12 5
Left
SR13 6 Left
SR14
7
Left
SR15 8
Left
The recommended service request number to be set into the INP
is either SR8 or SR9. If special circumstances require a
different INP service request number for your system, it
should still be located at a lower priority level (larger-
numbe r) than the Hardwired Serial Interface (HSI) and the
Synchronous Single-Line Controller (SSLC) but at a higher
priority level (smaller number) than the line printer and
other slower devices. (See Appendix A for an example of a
typical sequence of device priorities.)
I
b. The DRT number switches are eight miniature two-position
rocker switches in a single block (identical in appearance to
the switch blocks used for setting the MUX servic~ requests
in step a). The DRT number switch block is located in column
18, row 6, of the INP-MPU board (as shown in figure 2-1).
Set the DRT number into switches 2 through 8 in octal
I
notation (open
=
true), using switch number 2 to represent
the most significant bit and switch number 8 to represent the
least significant bit. Switch number l serves as an odd
parity jumper. Set switch number 1 to the appropriate
position (open or closed), so that an odd number of switches
(including the parity switch) is opened.
The recommended DRT number to be set into the !NP is either
I
25 or 26 (decimal). (See table 2-2.)
JUN 1980
2-5