Data General AViiON Series, Клиентская документация

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Installing and Removing VME Option Boards
3-11
014–001867
7. Once the board is seated in the card cage slot, secure the board in place by
inserting and tightening the securing screws above and below the handles into
the securing bar, as shown in Figure 3–12.
Computer chassis — side view Card cage rear
view Air dams
Securing screws
(Phillips or flat)
Securing bar
Securing
bars
(internal)
Securing screws
(Phillips or flat)
Figure 3–12 Securing a VME Board in the Card Cage
Once you have secured the boards in the card cage, follow the directions in the next
section, “Completing the Configuration.”
NOTE: If your board appears properly seated, but you cannot secure the captive
stand-off screws on your board’s air dam, refer to the section on “Securing
Boards with Captive Stand-Off Screws” in Appendix D.
Completing the Configuration
Once you have installed the board(s) in the planned configuration, you need to
install any necessary backplane jumpers, connect external devices to the VME
board(s), and rebuild the DG/UX operating system kernel. We also recommend that
you verify your new configuration by running an AViiON System Diagnostics
acceptance test after adding any new devices to your computer system.
Installing Backplane Jumpers for Empty Slots
If the VME card cage contains one or more empty slots between two boards, you
must install five jumpers on the backplane pins of each empty slot’s J1 connector.
(You noted this necessity when you assigned card cage slots to your configuration in
Chapter 1; we recommend that you avoid this configuration whenever possible.) If
your previous card cage configuration combined an empty slot 2 with an option
board in slot 3, and your new configuration includes a board in slot 2, you must
remove the backplane jumpers from slot 2.