specialreg.h revision 1.4.2.2
1 1.4.2.2 mycroft /*- 2 1.4.2.2 mycroft * Copyright (c) 1991 The Regents of the University of California. 3 1.4.2.2 mycroft * All rights reserved. 4 1.4.2.2 mycroft * 5 1.4.2.2 mycroft * Redistribution and use in source and binary forms, with or without 6 1.4.2.2 mycroft * modification, are permitted provided that the following conditions 7 1.4.2.2 mycroft * are met: 8 1.4.2.2 mycroft * 1. Redistributions of source code must retain the above copyright 9 1.4.2.2 mycroft * notice, this list of conditions and the following disclaimer. 10 1.4.2.2 mycroft * 2. Redistributions in binary form must reproduce the above copyright 11 1.4.2.2 mycroft * notice, this list of conditions and the following disclaimer in the 12 1.4.2.2 mycroft * documentation and/or other materials provided with the distribution. 13 1.4.2.2 mycroft * 3. All advertising materials mentioning features or use of this software 14 1.4.2.2 mycroft * must display the following acknowledgement: 15 1.4.2.2 mycroft * This product includes software developed by the University of 16 1.4.2.2 mycroft * California, Berkeley and its contributors. 17 1.4.2.2 mycroft * 4. Neither the name of the University nor the names of its contributors 18 1.4.2.2 mycroft * may be used to endorse or promote products derived from this software 19 1.4.2.2 mycroft * without specific prior written permission. 20 1.4.2.2 mycroft * 21 1.4.2.2 mycroft * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 1.4.2.2 mycroft * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 1.4.2.2 mycroft * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 1.4.2.2 mycroft * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 1.4.2.2 mycroft * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 1.4.2.2 mycroft * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 1.4.2.2 mycroft * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 1.4.2.2 mycroft * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 1.4.2.2 mycroft * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 1.4.2.2 mycroft * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 1.4.2.2 mycroft * SUCH DAMAGE. 32 1.4.2.2 mycroft * 33 1.4.2.2 mycroft * from: @(#)specialreg.h 7.1 (Berkeley) 5/9/91 34 1.4.2.2 mycroft * $Id: specialreg.h,v 1.4.2.2 1993/12/20 05:25:47 mycroft Exp $ 35 1.4.2.2 mycroft */ 36 1.4.2.2 mycroft 37 1.4.2.2 mycroft /* 38 1.4.2.2 mycroft * Bits in 386 special registers: 39 1.4.2.2 mycroft */ 40 1.4.2.2 mycroft 41 1.4.2.2 mycroft #define CR0_PE 0x00000001 /* Protected mode Enable */ 42 1.4.2.2 mycroft #define CR0_MP 0x00000002 /* "Math" Present (NPX or NPX emulator) */ 43 1.4.2.2 mycroft #ifdef notused 44 1.4.2.2 mycroft #define CR0_EM 0x00000004 /* EMulate non-NPX coproc. (trap ESC only) */ 45 1.4.2.2 mycroft #endif 46 1.4.2.2 mycroft #define CR0_TS 0x00000008 /* Task Switched (if MP, trap ESC and WAIT) */ 47 1.4.2.2 mycroft #ifdef notused 48 1.4.2.2 mycroft #define CR0_ET 0x00000010 /* Extension Type (387 (if set) vs 287) */ 49 1.4.2.2 mycroft #endif 50 1.4.2.2 mycroft #define CR0_PG 0x80000000 /* PaGing enable */ 51 1.4.2.2 mycroft 52 1.4.2.2 mycroft /* 53 1.4.2.2 mycroft * Bits in 486 special registers: 54 1.4.2.2 mycroft */ 55 1.4.2.2 mycroft 56 1.4.2.2 mycroft #define CR0_NE 0x00000020 /* Numeric Error enable (EX16 vs IRQ13) */ 57 1.4.2.2 mycroft #define CR0_WP 0x00010000 /* Write Protect (honor PG_RW in all modes) */ 58 1.4.2.2 mycroft #ifdef notyet 59 1.4.2.2 mycroft #define CR0_AM 0x00040000 /* Alignment Mask (set to enable AC flag) */ 60 1.4.2.2 mycroft #endif 61
Indexes created Sat Oct 25 16:10:12 GMT 2025