MAXDATA FUSION 6000 I, Системное руководство

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15 MAXDATA Fusion 6000
Legacy USB Support
Legacy USB support enables USB devices such as keyboard, mice, and hubs to be used
even when the operating system’s USB drivers are not yet available. Legacy USB support
is used to access the BIOS Setup program, and to install an operating system that supports
USB. By default, Legacy USB support is set to Enabled.
The MAXDATA Fusion 6000 System board has two USB 1.1 ports; one USB peripheral can be
connected to each port. For more than two USB devices, an external hub can be connected to
any of the ports. Two of the USB ports are implemented with stacked back panel connectors;
the other two are accessible via the front panel USB header. The MAXDATA Fusion 6000
System board fully supports UHCI and uses UHCI-compatible software drivers.
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NOTE
Computer systems that have an unshielded cable attached to a USB port may not meet FCC
Class B requirements, even if no device is attached to the cable. Use shielded cable that
meets the requirements for full-speed devices.
Legacy USB support operates as follows:
1. When the user applies power to the computer, legacy support is disabled.
2. POST begins.
3. Legacy USB support is enabled by the BIOS allowing the user to use a USB keyboard
to enter and configure the BIOS Setup program and the maintenance menu.
4. POST completes.
5. The operating system loads. While the operating system is loading, USB keyboard and
mice are recognized and may be used to configure the operating system. (Keyboard and
mice are not recognized during this period if Legacy USB support was set to Disabled in the
BIOS Setup program.)
6. After the operating system loads the USB drivers, all legacy and non-legacy USB devices are
recognized by the operating system, and Legacy USB support from the BIOS is no
longer used.
To install an operating system that supports USB, verify that Legacy USB support in the
BIOS Setup program is set to Enabled and follow the operating system’s installation
instructions.
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NOTE
Legacy USB support is for keyboard, mice, and hubs only. Other USB devices are not
supported in legacy mode.