62 lines
2.6 KiB
C
62 lines
2.6 KiB
C
/* $NetBSD: latchreg.h,v 1.2 2001/04/22 00:26:36 bjh21 Exp $ */
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/*-
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* Copyright (c) 1997, 1998, 2001 Ben Harris
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* This file is part of NetBSD/arm26 -- a port of NetBSD to ARM2/3 machines. */
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/*
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* latchreg.h - Archimedes internal latches
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*/
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#ifndef _LATCHREG_H
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#define _LATCHREG_H
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/* Register offsets for latches (bus_space units) */
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#define LATCH_A 0x10
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#define LATCH_B 0x06
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/* Latch A controls some of the floppy disc system (all active-low). */
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#define LATCHA_NSEL0 0x01 /* Floppy drive 0 select */
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#define LATCHA_NSEL1 0x02 /* Floppy drive 1 select */
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#define LATCHA_NSEL2 0x04 /* Floppy drive 2 select */
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#define LATCHA_NSEL3 0x08 /* Floppy drive 3 select */
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#define LATCHA_NSIDE1 0x10 /* Floppy side select. */
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#define LATCHA_NMOTORON 0x20 /* Motor on/off */
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#define LATCHA_NINUSE 0x40 /* 'In Use' */
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/* Bit 7 not used */
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/* Latch B does all sorts of random stuff (mostly active-low). */
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/* Bit 0 reserved */
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#define LATCHB_NDDEN 0x02 /* Floppy disc density setting */
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/* Bit 2 reserved */
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#define LATCHB_NFDCR 0x08 /* Floppy controller reset */
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#define LATCHB_NPSTB 0x10 /* Printer strobe line */
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#define LATCHB_AUX1 0x20 /* Spare (VIDC Enhancer?) */
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#define LATCHB_AUX2 0x40 /* Spare */
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/* Bit 7 not used */
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#endif /* !_LATCHREG_H */
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