src/m/sun1.h

   1 /* machine description file for Sun 68000's
   2    Copyright (C) 1985, 1986 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Emacs is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Emacs; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20
  21 /* The following line tells the configuration script what sort of
  22    operating system this machine is likely to run.
  23    USUAL-OPSYS="note"
  24
  25 NOTE-START
  26 Sun 1, 2 and 3 (-machine=sun1, -machine=sun2, -machine=sun3;
  27                 -opsystem=bsd4-2 or -opsystem=sunos4)
  28
  29   Whether you should use sun1, sun2 or sun3 depends on the
  30                    VERSION OF THE OPERATING SYSTEM
  31   you have.  There are three machine types for different versions of
  32   SunOS.  All are derived from Berkeley 4.2, meaning that you should
  33   use -opsystem=bsd4-2.  Emacs 17 has run on all of them.  You will
  34   need to use sun3 on Sun 2's running SunOS release 3.
  35
  36   For SunOS release 4 on a Sun 3, use -machine=sun3 and
  37   -opsystem=sunos4.  See the file share-lib/SUNBUG for how to solve
  38   problems caused by bugs in the "export" version of SunOS 4.
  39 NOTE-END  */
  40
  41 /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
  42    is the most significant byte.  */
  43
  44 #define WORDS_BIG_ENDIAN
  45
  46 /* Say this machine is a 68000 */
  47
  48 #define m68000
  49
  50 /* Use type int rather than a union, to represent Lisp_Object */
  51
  52 #define NO_UNION_TYPE
  53
  54 /* Sun can't write competent compilers */
  55 #define COMPILER_REGISTER_BUG
  56
  57 /* XINT must explicitly sign-extend */
  58
  59 #define EXPLICIT_SIGN_EXTEND
  60
  61 /* Data type of load average, as read out of kmem.  */
  62
  63 #define LOAD_AVE_TYPE long
  64
  65 /* Convert that into an integer that is 100 for a load average of 1.0  */
  66
  67 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
  68
  69 /* Must use the system's termcap.  It does special things.  */
  70
  71 #define LIBS_TERMCAP -ltermcap
  72
  73 /* Mask for address bits within a memory segment */
  74
  75 #define SEGMENT_MASK (SEGSIZ - 1)