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Interface Installation and Configuration
3
Installing Interface Cards in the 1/0 Backplane
The HP 9826/9836 computer has eight backplane slots that can be used for interface cards,
memory boards, and other devices. However, only four slots can be used for interfacing to
external peripherals. The peripheral interface slots are located slightly below the threaded
fasteners that hold the interface retainer screws when the card is inserted. If you insert the
interface into the wrong slot, the thumbscrews in the interface cover cannot mate properly with
the threaded fasteners in the rear panel. As successive interfaces are installed, the remaining
slots that are available for memory or other devices are reduced by one for each interface
inserted.
To install the interface card, follow these steps:
1. Set the configuration switches on the interface as instructed in the Configuring the Inter-
facE~
section later in this chapter.
2. Be sure that the computer power switch is OFF.
3. Remove one or more backplane covers to locate an empty 110 slot. If none is available,
rearrange the memory boards as necessary. Memory boards can be installed in any slot in
the backplane. Be sure all boards are firmly seated in their respective backplane connec-
tors before replacing the covers.
If no slots are available, you must remove a memory board or other
110 card to free up
the necessary backplane space. If you remove a RAM memory board, it must be the
lowest address board in the backplane. Refer to the Operating Manual for your computer
for information on how to identify the lowest -address memory card.
4. Slide the interface card into any available slot, component side UP. Seat the card firmly
into its backplane connecter, then tighten the thumbscrews until they are finger tight. Be
sun~
a DMA card has been installed in the computer.
5. Replace any remaining covers that were previously removed, then use an appropriate
cable to connect the interface to the first disc drive. Use HP 10833 cables to connect to
othler drives as explained later in this chapter.
6. Turn the computer and peripheral(s) on and operate as explained in the applicable
ope:rating manuals. If you encounter difficulty, contact your nearest HP Sales and Service
office.
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