HP Visualize c360 Supplementary Manual page 17

Pa-risc workstation universal serial bus

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• PDC/IODC has been updated only for SPUs with built-in USB.

• Firmware searches for a keyboard on the USB controller path specified (by

default, the built-in controller, but PCI-USB cards are addressable).

• At initial release, the console keyboard must be one of the first seven devices

found. If it is connected directly to the host, or there is only one 4-port or 7-port

hub in use, it will be.

• Firmware accepts input from the first keyboard found, in a breadth-first search

for the keyboard topologically closest to the processor.

• Only "HID Boot" devices are eligible for boot console. Any device, such as a USB

numeric pad, that identifies as "HID boot", but is not a full keyboard, needs to be

located beyond the console keyboard in the topology.

• Hot detach-reattach is not supported. The SPU must be rebooted if the keyboard

is disconnected during boot.

• If no keyboard is found, firmware seeks console on the first serial port.

USB Support: PA-RISC Firmware