84 HP ProLiant DL580 Generation 3 Server Maintenance and Service Guide
USB support
HP provides both standard USB support and legacy USB support. Standard
support is provided by the operating system through the appropriate USB device
drivers. HP provides support for USB devices before the operating system loads
through legacy USB support, which is enabled by default in the system ROM.
HP hardware supports USB version 1.1 or 2.0, depending on the version of the
hardware.
Legacy USB support provides USB functionality in environments where USB
support is normally not available. Specifically, HP provides legacy USB
functionality for:
• POST
• RBSU
• Diagnostics
• DOS
• Operating environments which do not provide native USB support
For more information on ProLiant USB support, refer to the HP website
(http://h18004.www1.hp.com/products/servers/platforms/usb-support.html
).
Troubleshooting the system using port 85 codes
1. Locate the port 85 code display on the media board.
IMPORTANT: Be sure the port 84/85 switch is set to display port
85 codes on the media board ("Setting the switch to view port 85 codes"
on page 107
).
2. Locate the code in the following table.
3. Reference the designated section in this guide for the appropriate
troubleshooting steps.
For example, if the port 85 code displays "31h," refer to "Processor-related port
85 codes (on page 85
)" for more information.
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