61 lines
2.5 KiB
C
61 lines
2.5 KiB
C
/* $NetBSD: latchreg.h,v 1.2 2002/03/24 23:37:44 bjh21 Exp $ */
|
|
/*-
|
|
* Copyright (c) 1997, 1998, 2001 Ben Harris
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
/*
|
|
* latchreg.h - Archimedes internal latches
|
|
*/
|
|
|
|
#ifndef _LATCHREG_H
|
|
#define _LATCHREG_H
|
|
|
|
/* Register offsets for latches (bus_space units) */
|
|
|
|
#define LATCH_A 0x10
|
|
#define LATCH_B 0x06
|
|
|
|
/* Latch A controls some of the floppy disc system (all active-low). */
|
|
#define LATCHA_NSEL0 0x01 /* Floppy drive 0 select */
|
|
#define LATCHA_NSEL1 0x02 /* Floppy drive 1 select */
|
|
#define LATCHA_NSEL2 0x04 /* Floppy drive 2 select */
|
|
#define LATCHA_NSEL3 0x08 /* Floppy drive 3 select */
|
|
#define LATCHA_NSIDE1 0x10 /* Floppy side select. */
|
|
#define LATCHA_NMOTORON 0x20 /* Motor on/off */
|
|
#define LATCHA_NINUSE 0x40 /* 'In Use' */
|
|
/* Bit 7 not used */
|
|
|
|
/* Latch B does all sorts of random stuff (mostly active-low). */
|
|
/* Bit 0 reserved */
|
|
#define LATCHB_NDDEN 0x02 /* Floppy disc density setting */
|
|
/* Bit 2 reserved */
|
|
#define LATCHB_NFDCR 0x08 /* Floppy controller reset */
|
|
#define LATCHB_NPSTB 0x10 /* Printer strobe line */
|
|
#define LATCHB_AUX1 0x20 /* Spare (VIDC Enhancer?) */
|
|
#define LATCHB_AUX2 0x40 /* Spare */
|
|
/* Bit 7 not used */
|
|
|
|
#endif /* !_LATCHREG_H */
|