src/m/7300.h

   1 /* machine description file for AT&T UNIX PC model 7300
   2    Copyright (C) 1986 Free Software Foundation, Inc.
   3    Modified for this machine by mtxinu!rtech!gonzo!daveb
   4
   5 This file is part of GNU Emacs.
   6
   7 GNU Emacs is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 1, or (at your option)
  10 any later version.
  11
  12 GNU Emacs is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU Emacs; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  20
  21
  22 /* The following line tells the configuration script what sort of
  23    operating system this machine is likely to run.
  24    USUAL-OPSYS="usg5-2-2"  */
  25
  26 /* Supposedly now these machines have flexnames.
  27
  28 /* # define SHORTNAMES */
  29
  30
  31 /* The following three symbols give information on
  32  the size of various data types.  */
  33
  34 #define SHORTBITS 16            /* Number of bits in a short */
  35
  36 #define INTBITS 32              /* Number of bits in an int */
  37
  38 #define LONGBITS 32             /* Number of bits in a long */
  39
  40 /* Define BIG_ENDIAN iff lowest-numbered byte in a word
  41    is the most significant byte.  */
  42
  43 #define BIG_ENDIAN
  44
  45 /* XINT must explicitly sign-extend */
  46
  47 #define EXPLICIT_SIGN_EXTEND
  48
  49 /* Use type int rather than a union, to represent Lisp_Object */
  50
  51 #define NO_UNION_TYPE
  52
  53 /* Now define a symbol for the cpu type, if your compiler
  54    does not define it automatically:
  55    vax, m68000, ns16000 are the ones defined so far.  */
  56
  57 # ifndef mc68k
  58 # define mc68k
  59 # endif
  60 #ifndef m68k
  61 #define m68k
  62 #endif
  63
  64 /* Cause crt0.c to define errno.  */
  65
  66 #define NEED_ERRNO
  67
  68 /* Data type of load average, as read out of kmem.  */
  69 /* These are commented out since it is not supported by this machine.  */
  70
  71 /* #define LOAD_AVE_TYPE long */
  72
  73 /* Convert that into an integer that is 100 for a load average of 1.0  */
  74
  75 /* #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0) */
  76
  77 #define SWITCH_ENUM_BUG
  78
  79 /* These three lines were new in 18.50.  They were said to permit
  80    a demand-paged executable, but someone else says they don't work.
  81    Someone else says they do.  They didn't work because errno was an
  82    initialized variable in crt0.c, and because of %splimit (also therein),
  83    both of which have been fixed now. */
  84 #define SECTION_ALIGNMENT 0x03ff
  85 #define SEGMENT_MASK 0xffff
  86 #define LD_SWITCH_MACHINE -z