
System Board
System Chipset
Chapter 2 31
NOTE The x4000 Workstation is optimized for use with SCSI hard disk
drives. IDE hard disk drives are not tested or recommended in the
x4000.
• Two external USB ports which are USB 1.1 compliant ports with
over-current protection and support for wake up from S1 (sleep) state
(USB mouse and keyboard are not supported).
• Audio
• Super I/0
• SMBUS
Super I/O Chip (National PC87366)
The Super I/O provides the interface to:
• Two serial ports (A and B). The serial port interface voltage levels are
established by DS14185A communication port interface chips.
• One EPP parallel port
• Floppy disk drive
• PS2 Keyboard
• PS2 Mouse
LAN Chip (Intel 82550)
The LAN chip:
• Is 10/100 Base T
• Is IEEE 802.3 compliant
• Is on the 33 MHz, 32-bit PCI bus
• Supports Wake-on-LAN via the PME# signal
• Stores configuration information on attached SEEPROM chip
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