code.delx.au - gnu-emacs/blob - src/m/tower32.h

   1 /* machine description file for the NCR Tower 32 running System V.2.
   2    Copyright (C) 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="usg5-2-2"  */
  24
  25 /* The following three symbols give information on
  26  the size of various data types.  */
  27
  28 #define SHORTBITS 16            /* Number of bits in a short */
  29
  30 #define INTBITS 32              /* Number of bits in an int */
  31
  32 #define LONGBITS 32             /* Number of bits in a long */
  33
  34 /* Define BIG_ENDIAN iff lowest-numbered byte in a word
  35    is the most significant byte.  */
  36
  37 #define BIG_ENDIAN
  38
  39 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  40  * group of arguments and treat it as an array of the arguments.  */
  41
  42 /* #define NO_ARG_ARRAY */
  43
  44 /* Define WORD_MACHINE if addresses and such have
  45  * to be corrected before they can be used as byte counts.  */
  46
  47 /* #define WORD_MACHINE */
  48
  49 /* Now define a symbol for the cpu type, if your compiler
  50    does not define it automatically:
  51    vax, m68000, ns16000, pyramid, orion, tahoe and APOLLO
  52    are the ones defined so far.  */
  53 #define m68000
  54
  55 /* Use type int rather than a union, to represent Lisp_Object */
  56 /* This is desirable for most machines.  */
  57
  58 #define NO_UNION_TYPE
  59
  60 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  61    the 24-bit bit field into an int.  In other words, if bit fields
  62    are always unsigned.
  63
  64    If you use NO_UNION_TYPE, this flag does not matter.  */
  65
  66 #define EXPLICIT_SIGN_EXTEND
  67
  68 /* Data type of load average, as read out of kmem.  */
  69
  70 /* #define LOAD_AVE_TYPE long */
  71
  72 /* Convert that into an integer that is 100 for a load average of 1.0  */
  73
  74 /* #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE) */
  75
  76 /* Define CANNOT_DUMP on machines where unexec does not work.
  77    Then the function dump-emacs will not be defined
  78    and temacs will do (load "loadup") automatically unless told otherwise.  */
  79
  80 /* #define CANNOT_DUMP */
  81
  82 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  83    pure and impure space as loaded can vary, and even their
  84    relative order cannot be relied on.
  85
  86    Otherwise Emacs assumes that text space precedes data space,
  87    numerically.  */
  88
  89 /* #define VIRT_ADDR_VARIES */
  90
  91 /* Define C_ALLOCA if this machine does not support a true alloca
  92    and the one written in C should be used instead.
  93    Define HAVE_ALLOCA to say that the system provides a properly
  94    working alloca function and it should be used.
  95    Define neither one if an assembler-language alloca
  96    in the file alloca.s should be used.  */
  97
  98 /* #define C_ALLOCA */
  99 #define HAVE_ALLOCA
 100
 101 /* Change some things to avoid bugs in compiler */
 102
 103 #define SWITCH_ENUM_BUG 1
 104
 105 /* The standard C library is -lcieee, not -lc.
 106    Also use the PW library, which contains alloca.  */
 107
 108 #define LIB_STANDARD -lPW -lcieee
 109
 110 /* crt0.c should use the vax-bsd style of entry.  Beware that if you have
 111    OS release 2.00.00 or later, *and* change src/ymakefile so that CFLAGS
 112    includes C_OPTIMIZE_SWITCH rather than C_DEBUG_SWITCH, you need to
 113    uncomment CRT0_DUMMIES and C_OPTIMIZE_SWITCH below.  */
 114
 115 /* With the optimizer OFF */
 116
 117 #define CRT0_DUMMIES zero, bogus_fp,
 118
 119 /* With the optimizer ON */
 120
 121 /* #define CRT0_DUMMIES */
 122 /* #define C_OPTIMIZE_SWITCH -O2 */
 123
 124 /* emacs's magic number isn't temacs's;
 125    temacs is writeable text (the default!).  */
 126
 127 #include <asld.h>
 128 #define EXEC_MAGIC AOUT1MAGIC
 129 #define EXEC_PAGESIZE DATACLICK