DEC AlphaServer 2100, Owner'S Manual

Page: 108 / 192

EISA Bus Options
EISA Bus Options
The EISA bus (Extended Industry Standard Architecture bus)
is a 32-bit industry standard I/O bus. EISA is a superset of the
well-established 16-bit ISA bus. EISA was designed to accept
newer 32-bit components while still remaining compatible with
older 8-bit and 16-bit cards.
With a bandwidth of 33 MB/sec, EISA is well suited to
medium-performance options, such as modems, asynchronous
communication controllers, and other miscellaneous peripherals.
Up to eight EISA (or ISA) modules can reside in the EISA bus
portion of the card cage. All slots are bus master slots. EISA
slots can be filled in any order.
Figure 3–2 shows the location of EISA options on the card
cage. To access the card cage, remove the left panel. Refer to
Figure 2–2 and the accompanying instructions before removing
the left panel. Be sure to reattach the panel screws before
attempting to power up the system again.
Caution
Do not remove the left panel when the system is running.
If you remove the left panel without first properly
shutting down the system, the system will power down
unexpectedly and you may lose data.
3–24 Options and Upgrades