Compaq AlphaServer 160 User Manual page 45

A PCI master box has a standard I/O module and a DVD/CD-ROM drive as
shown in Figure 2–19. PCI expansion boxes provide additional slots for options.
Each PCI power supply has three LEDs: Vaux OK, Power OK, and Swap OK.
BA54A-AA PCI Box
The BA54A-AA PCI box is a PCI master box. It contains the following
components:
•
Backplane with a standard I/O module
•
Thirteen I/O option slots
•
DVD/CD-ROM drive
•
SCSI disk drive
•
Ports: one local terminal port, one serial port, one modem port, one parallel
port, two USB ports, one keyboard port, one mouse port, one CSB port, and
one control panel port
•
Two I/O riser slots
•
Two power supplies
BA54A-BA PCI Box
The BA54A-BA box is a PCI expansion box and contains the following
components:
•
Backplane with fourteen option slots
•
Two I/O riser slots
•
Two power supplies
GS160/320 System Overview 2-27