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AC450NX Rack Server System Product Guide
20
Server Features (continued)
Feature Comment
PHP I/O baseboard One 16-bit ISA expansion slot shares a common chassis I/O expansion
slot with a 32-bit PCI slot (you can use the shared slot for either ISA or
PCI but not both).
Six 32-bit PCI expansion slots; one of them shares a common chassis
I/O expansion slot with the ISA slot (you can use the shared slot for
either PCI or ISA but not both).
Four 64-bit PCI hot-plug expansion slots.
Integrated Cirrus Logic GD5446 VisualMedia
†
PCI super video graphics
array (SVGA) controller with 2 MB of video memory.
The Symbios
†
53C896 LVDS SCSI controller supports two LVDS
channels. One channel controls internal devices such as CD-ROMs,
tape, and DVDs drives, in addition to the two hard drives in the
peripheral bay. The other channel provides a connection to external
devices.
The diskette controller supports one drive.
The PCI-enhanced Integrated Drive Electronics (IDE) interface
supports one IDE bus.
PS/2
†
-compatible keyboard/mouse controller.
Two universal serial bus (USB) ports.
I/O riser card This card contains all legacy I/O connections; it plugs into a card edge
connector on the PHP I/O baseboard.
PS/2-compatible keyboard and mouse ports (these are
interchangeable).
PS/2-compatible parallel port.
Analog VGA, 15-pin video port.
Two PS/2-compatible, 9-pin serial ports.
Midplane The midplane
• electrically connects the PHP I/O, memory, power supplies and
CPU baseboard
• distributes DC power to the PHP I/O and CPU baseboards,
peripheral bay backplane, cooling fans, and the front panel board
• distributes the power load of the server among two or three
750 watt autoranging power supplies
Front side bus (FSB) terminator
module
This module plugs into any unpopulated slot 2 connector on the CPU
baseboard. This module terminates the FSB GTL+ signals of the slot 2
connector when a processor S.E.C. cartridge is not installed in it.
Peripheral bay backplane This backplane supports hot-swapping of SCA type SCSI drives,
mounted in carriers, in and out of the hot-docking bays.