HP Kayak XU 04xx HP Kayak XU PC Workstation Technical Reference Manual Hardwar - Page 30

Universal Serial Bus (USB) Controller, Other PCI Accessory Devices, Plug and Play

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2 System Board Devices on the PCI Bus NOTE Plug and Play It is possible to mix a fast and a slow device, such as a hard disk drive and a a CD-ROM, on the same channel without affecting the performance of the fast device. The BIOS determines automatically the fastest configuration that each device it supports. Universal Serial Bus (USB) Controller The USB controller is implemented as part of the PIIX4. It is accessed through the PCI bus, and provides support for the two stacked USB connectors on the back panel. Over-current detection and protection is provided, but shared between the two ports. USB works only if the USB interface has been enabled within the HP Setup program. Currently, only the Microsoft Windows 95 operating system provides support for the USB. The Microsoft Windows 95 Supplement 2.1 software (called USBSupp.exe), which provides support of the Universal Serial Bus, can be obtained from the Hewlett-Packard World Wide Web site (refer to "Access HP World Wide Web" on page 6). The system board is capable of routing one USB channel to the AGP. This choice will be available with a future BIOS release in the system setup. Other PCI Accessory Devices PCI accessory boards are for high-speed peripheral accessories. A total of four PCI slots are provided on the system board. One of these is already occupied by the network board, and a second may be occupied by the Adaptec ARO-1130 card, if the PC Workstation model includes the HP FastRAID solution (refer to "HP FastRAID Solution" on page 38). These two accessories are described in the next chapter. The fourth slot is a combination slot with the ISA bus. The HP Kayak XU/ PC Workstations have a "PnP level 1.0A" BIOS and meets the "Windows 95 Required" level for Plug and Play. Accessory boards which are Plug and Play are automatically configured by the operating system (for Windows 95). 22

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22
2
System Board
Devices on the PCI Bus
It is possible to mix a fast and a slow device, such as a hard disk drive and a
a CD-ROM, on the same channel without affecting the performance of the
fast device. The BIOS determines automatically the fastest configuration
that each device it supports.
Universal Serial Bus (USB) Controller
The USB controller is implemented as part of the PIIX4. It is accessed
through the PCI bus, and provides support for the two stacked USB
connectors on the back panel. Over-current detection and protection is
provided, but shared between the two ports.
USB works only if the USB interface has been enabled within the HP
Setup
program. Currently, only the Microsoft Windows 95 operating system
provides support for the USB.
The Microsoft Windows 95 Supplement 2.1 software (called
USBSupp.exe
),
which provides support of the Universal Serial Bus, can be obtained from
the Hewlett-Packard World Wide Web site (refer to
“Access HP World Wide
Web” on page 6
).
NOTE
The system board is capable of routing one USB channel to the AGP. This
choice will be available with a future BIOS release in the system setup.
Other PCI Accessory Devices
PCI accessory boards are for high-speed peripheral accessories. A total of
four PCI slots are provided on the system board. One of these is already
occupied by the network board, and a second may be occupied by the
Adaptec ARO-1130 card, if the PC Workstation model includes the HP
FastRAID solution (refer to
“HP FastRAID Solution” on page 38
). These two
accessories are described in the next chapter. The fourth slot is a
combination slot with the ISA bus.
Plug and Play
The
HP Kayak XU/ PC Workstation
s have a “PnP level 1.0A” BIOS and
meets the “Windows 95 Required” level for Plug and Play. Accessory boards
which are Plug and Play are automatically configured by the operating system
(for Windows 95).