1/* $NetBSD: latchreg.h,v 1.1 2002/03/24 15:47:20 bjh21 Exp $ */ 2/*- 3 * Copyright (c) 1997, 1998, 2001 Ben Harris 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28/* 29 * latchreg.h - Archimedes internal latches 30 */ 31 32#ifndef _LATCHREG_H 33#define _LATCHREG_H 34 35/* Register offsets for latches (bus_space units) */ 36 37#define LATCH_A 0x10 38#define LATCH_B 0x06 39 40/* Latch A controls some of the floppy disc system (all active-low). */ 41#define LATCHA_NSEL0 0x01 /* Floppy drive 0 select */ 42#define LATCHA_NSEL1 0x02 /* Floppy drive 1 select */ 43#define LATCHA_NSEL2 0x04 /* Floppy drive 2 select */ 44#define LATCHA_NSEL3 0x08 /* Floppy drive 3 select */ 45#define LATCHA_NSIDE1 0x10 /* Floppy side select. */ 46#define LATCHA_NMOTORON 0x20 /* Motor on/off */ 47#define LATCHA_NINUSE 0x40 /* 'In Use' */ 48/* Bit 7 not used */ 49 50/* Latch B does all sorts of random stuff (mostly active-low). */ 51/* Bit 0 reserved */ 52#define LATCHB_NDDEN 0x02 /* Floppy disc density setting */ 53/* Bit 2 reserved */ 54#define LATCHB_NFDCR 0x08 /* Floppy controller reset */ 55#define LATCHB_NPSTB 0x10 /* Printer strobe line */ 56#define LATCHB_AUX1 0x20 /* Spare (VIDC Enhancer?) */ 57#define LATCHB_AUX2 0x40 /* Spare */ 58/* Bit 7 not used */ 59 60#endif /* !_LATCHREG_H */ 61