1 .\" $NetBSD: unixbp.4,v 1.1 2002/03/24 22:29:58 bjh21 Exp $
3 .\" Copyright (c) 2000 Ben Harris
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33 .Nd Unix Backplane driver
35 .Cd unixbp0 at ioc0 bank 6
39 driver controls the interrupt-masking hardware on the expansion-card
40 backplane of certain systems. This hardware gives
42 the ability to selectively block interrupts from particular expansion
43 cards, and to determine which cards are currently generating interrupts by
44 examining a single register.