src/m/cydra5.h

   1 /* machine description file for Cydrome's CYDRA 5 mini super computer
   2    Copyright (C) 1988 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, Inc., 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, 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="usg5-3"  */
  25
  26 /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
  27    is the most significant byte.  */
  28
  29 #define WORDS_BIG_ENDIAN
  30
  31 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  32  * group of arguments and treat it as an array of the arguments.  */
  33
  34 #undef NO_ARG_ARRAY
  35
  36 /* Define WORD_MACHINE if addresses and such have
  37  * to be corrected before they can be used as byte counts.  */
  38
  39 #undef WORD_MACHINE
  40
  41 /* Now define a symbol for the cpu type, if your compiler
  42    does not define it automatically:
  43    Ones defined so far include vax, m68000, ns16000, pyramid,
  44    orion, tahoe, APOLLO and many others */
  45
  46 /* Use type int rather than a union, to represent Lisp_Object */
  47 /* This is desirable for most machines.  */
  48
  49 #define NO_UNION_TYPE
  50
  51 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  52    the 24-bit bit field into an int.  In other words, if bit fields
  53    are always unsigned.
  54
  55    If you use NO_UNION_TYPE, this flag does not matter.  */
  56
  57 #define EXPLICIT_SIGN_EXTEND
  58
  59 /* Data type of load average, as read out of kmem.  */
  60
  61 #define LOAD_AVE_TYPE long
  62
  63 /* Convert that into an integer that is 100 for a load average of 1.0  */
  64
  65 #define LOAD_AVE_CVT(x) x
  66
  67 /* Define CANNOT_DUMP on machines where unexec does not work.
  68    Then the function dump-emacs will not be defined
  69    and temacs will do (load "loadup") automatically unless told otherwise.  */
  70
  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 data space precedes text space,
  78    numerically.  */
  79
  80 #undef VIRT_ADDR_VARIES
  81
  82 /* Define C_ALLOCA if this machine does not support a true alloca
  83    and the one written in C should be used instead.
  84    Define HAVE_ALLOCA to say that the system provides a properly
  85    working alloca function and it should be used.
  86    Define neither one if an assembler-language alloca
  87    in the file alloca.s should be used.  */
  88
  89 #define C_ALLOCA
  90 #undef HAVE_ALLOCA
  91
  92 /* The data segment in this machine always starts at address 0x10000000.
  93    An address of data cannot be stored correctly in a Lisp object;
  94    we always lose the high bits.  We must tell XPNTR to add them back.  */
  95
  96 #define DATA_SEG_BITS 0x20000000
  97 #define DATA_START    0x20000000
  98
  99 /* Define NO_REMAP if memory segmentation makes it not work well
 100    to change the boundary between the text section and data section
 101    when Emacs is dumped.  If you define this, the preloaded Lisp
 102    code will not be sharable; but that's better than failing completely.  */
 103
 104 #define NO_REMAP
 105 #define BROKEN_FIONREAD /* We son't even have it */
 106 #define LIBS_MACHINE    -lsocket -lnsl
 107
 108 /* Stack grows downward in memory.  */
 109 #define STACK_DIRECTION -1
 110
 111 /* The data section in a coff file must be aligned in the file.  */
 112 #define DATA_SECTION_ALIGNMENT  0xFFF
 113
 114 /* Compiler won't allow switch (x) when x is an enum.  */
 115 #define SWITCH_ENUM_BUG
 116
 117
 118 /* Explain how pty filenames work.  */
 119
 120 #define PTY_ITERATION  for (i = 47; i >= 0; i--)
 121 #define PTY_NAME_SPRINTF  sprintf (ptyname, "/dev/pty%03x", i);
 122 #define PTY_TTY_NAME_SPRINTF  sprintf (ptyname, "/dev/ptm%03x", i);
 123
 124 /* We can't do interrupt-driven input, so don't let user try.  */
 125
 126 #undef SIGIO