src/m/att3b.h

   1 /* Machine-dependent configuration for GNU Emacs for AT&T 3b machines.
   2    Copyright (C) 1986, 2002, 2003, 2004, 2005,
   3                  2006 Free Software Foundation, Inc.
   4
   5    Modified by David Robinson (daver@csvax.caltech.edu) 6/6/86
   6
   7 This file is part of GNU Emacs.
   8
   9 GNU Emacs is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 2, or (at your option)
  12 any later version.
  13
  14 GNU Emacs is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GNU Emacs; see the file COPYING.  If not, write to
  21 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  22 Boston, MA 02110-1301, USA.  */
  23
  24
  25 /* The following line tells the configuration script what sort of
  26    operating system this machine is likely to run.
  27    USUAL-OPSYS="usg5-2-2"  */
  28
  29 /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
  30    is the most significant byte.  */
  31
  32 #define WORDS_BIG_ENDIAN
  33
  34 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  35  * group of arguments and treat it as an array of the arguments.  */
  36
  37 /* #define NO_ARG_ARRAY */
  38
  39 /* Define WORD_MACHINE if addresses and such have
  40  * to be corrected before they can be used as byte counts.  */
  41
  42 /* #define WORD_MACHINE */
  43
  44 /* Now define a symbol for the cpu type, if your compiler
  45    does not define it automatically */
  46 #define ATT3B
  47
  48 /* Use type int rather than a union, to represent Lisp_Object */
  49 /* This is desirable for most machines.  */
  50
  51 #define NO_UNION_TYPE
  52
  53 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  54    the bit field into an int.  In other words, if bit fields
  55    are always unsigned.
  56
  57    If you use NO_UNION_TYPE, this flag does not matter.  */
  58
  59 #define EXPLICIT_SIGN_EXTEND
  60
  61 /* Data type of load average, as read out of kmem.  */
  62 /* #define LOAD_AVE_TYPE long */
  63
  64 /* Convert that into an integer that is 100 for a load average of 1.0  */
  65
  66 /* #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE) */
  67
  68 /* Define CANNOT_DUMP on machines where unexec does not work.
  69    Then the function dump-emacs will not be defined
  70    and temacs will do (load "loadup") automatically unless told otherwise.  */
  71 /* #define CANNOT_DUMP */
  72
  73 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  74    pure and impure space as loaded can vary, and even their
  75    relative order cannot be relied on.
  76
  77    Otherwise Emacs assumes that text space precedes data space,
  78    numerically.  */
  79
  80 /* #define VIRT_ADDR_VARIES */  /* Karl Kleinpaste says this isn't needed.  */
  81
  82 /* SysV has alloca in the PW library */
  83
  84 #define LIB_STANDARD -lPW -lc
  85
  86 /* Define NO_REMAP if memory segmentation makes it not work well
  87    to change the boundary between the text section and data section
  88    when Emacs is dumped.  If you define this, the preloaded Lisp
  89    code will not be sharable; but that's better than failing completely.  */
  90
  91 #define NO_REMAP
  92
  93 /* #define LD_SWITCH_MACHINE -N */
  94
  95 /* Use Terminfo, not Termcap.  */
  96
  97 #define TERMINFO
  98
  99 /* -O has been observed to make correct C code in Emacs not work.
 100    So don't try to use it.  */
 101
 102 #if u3b2 || u3b5 || u3b15
 103 #define C_OPTIMIZE_SWITCH
 104 #endif
 105
 106 /* Define our page size.  */
 107
 108 #define NBPC 2048
 109
 110 #if 0 /* If this is still needed, don't hard-code assumptions about
 111          the number of VALBITS, or other assumptions about the
 112          Lisp_Object representation.  Try to extend lisp.h instead, if
 113          necessary.  */
 114 /* The usual definition of XINT, which involves shifting, does not
 115    sign-extend properly on this machine.  */
 116
 117 #define XINT(i) (((sign_extend_temp=(i)) & 0x00800000) \
 118                  ? (sign_extend_temp | 0xFF000000) \
 119                  : (sign_extend_temp & 0x00FFFFFF))
 120 #endif
 121
 122 #ifdef emacs /* Don't do this when making xmakefile! */
 123 extern int sign_extend_temp;
 124 #endif
 125
 126 #if u3b2 || u3b5 || u3b15
 127 /* On 3b2/5/15, data space has high order bit on. */
 128 #define DATA_SEG_BITS 0x80000000
 129 #endif /* 3b2, 3b5 or 3b15 */
 130
 131 #define TEXT_START 0
 132
 133 /* (short) negative-int doesn't sign-extend correctly */
 134 #define SHORT_CAST_BUG
 135
 136 /* 3B2s with WIN/3B have winsize defined in ptem.h */
 137 #if u3b2
 138 #define NEED_PTEM_H
 139 #endif /* u3b2 */
 140
 141 /* 3b2 does not have memmove, I'm told.  */
 142 /* It is safe to have no parens around the args in the safe_bcopy call,
 143    and parens would screw up the prototype decl for memmove.  */
 144 #define memmove(d, s, n) safe_bcopy (s, d, n)
 145
 146 /* This affects filemode.c.  */
 147 #define NO_MODE_T
 148
 149 /* arch-tag: 07441a37-d630-447f-94fa-7da19645c97a
 150    (do not change this comment) */