PA-RISC Visualize Workstation Universal Serial Bus

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USB Support: HP-UX Kernel (cont.)
USB Class Drivers supplied at initial release:
• Hub: Root and external
• HID: Human Interface Device
Note that thunking makes USB “boot” devices appear to be PS/2.
Class Drivers under investigation (but not yet committed):
• Communication: For serial adaptors primarily. WAN attach might be addressed,
but LAN is a non-objective, given that USB is slower than 10BaseT.
• Printer: However, it may be trivial, mainly because Unix has no GDI. Further, at
the I/O port level, HP-UX presumes only a raw data stream (lprpp(1M) handles
EOL mapping, and the app or spooler is responsible for the PDL). The USB-par-
allel adaptors tested so far simply work, once the device file is created.
Class Drivers under consideration:
• Audio: For external speakers primarily.
• Imaging
• Mass Storage
• Monitor Control (in HID Class)