Specifications

AlphaServer 1000A Owner's Guide Configuring • 6-15
Figure 6-4 EISA, ISA, and PCI Option Slots
EISA/ISA
Option Slots
MA00916
11
12
13
1
2
3
4
PCI
Primary
Slots
PCI
Secondary
Slots
For information about installing a specific option, refer to the documentation for that
option. For information about configuring an EISA option, refer to the sections,
"EISA Configuration Utility (ECU)" and "Configuring EISA Options," later in this
chapter.
Warning: Before installing EISA bus
options, turn off all power to the system.
Refer to "Turning the System Off" in
Chapter 4, "Basic Operation."
ISA Bus
The ISA (Industry Standard Architecture) bus is an industry-standard, 16-bit I/O
bus. The EISA bus is a superset of the well-established ISA bus and has been
designed to be backward compatible with 16-bit and 8-bit architectures. Therefore,