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HDK Technical Reference

MicroChannel configuration information

Drivers can access microchannel device configuration information. The Programmable Option Select (POS) registers on a MicroChannel machine can be read but should not be written by device drivers. In particular, MicroChannel drivers should never change any adapter settings that are configurable through the standard MicroChannel device configuration process involving reference floppies and option disks.

See mca(D5)


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OpenServer 6 and UnixWare (SVR5) HDK - June 2005