61 lines
2.7 KiB
C
61 lines
2.7 KiB
C
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/* $NetBSD: latchreg.h,v 1.1 2000/05/09 21:56:02 bjh21 Exp $ */
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/*-
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* Copyright (c) 1997, 1998 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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/* Under NetBSD, Latch A is latch0 and Latch B is latch1. */
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#ifndef _LATCHREG_H
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#define _LATCHREG_H
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/* Latch A controls some of the floppy disc system */
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#define LATCH0_DRIVESEL0 0x01 /* Floppy drive 0 select */
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#define LATCH0_DRIVESEL1 0x02 /* Floppy drive 1 select */
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#define LATCH0_DRIVESEL2 0x04 /* Floppy drive 2 select */
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#define LATCH0_DRIVESEL3 0x08 /* Floppy drive 3 select */
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#define LATCH0_SIDESEL 0x10 /* Floppy side select, inverted. */
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#define LATCH0_SIDE0 0x10
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#define LATCH0_SIDE1 0x00 /* Just to be friendly... */
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#define LATCH0_MOTORONOFF 0x20 /* Motor on/off */
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#define LATCH0_INUSE 0x40 /* 'In Use' */
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/* Latch B does all sorts of random stuff */
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#define LATCH1_DENSITY 0x02 /* Floppy disc density setting */
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#define LATCH1_DOUBLEDENSITY 0x00 /* Double density */
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#define LATCH1_SINGLEDENSITY 0x02 /* Single density */
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#define LATCH1_NOTFDCRESET 0x08 /* Floppy controller reset (inverted) */
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#define LATCH1_LPTSTROBE 0x10 /* Printer strobe line */
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#define LATCH1_AUX1 0x20 /* Spare (VIDC Enhancer?) */
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#define LATCH1_AUX2 0x40 /* Spare */
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#endif /* !_LATCHREG_H */
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