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 1, 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="usg5-3"  */
  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 #undef 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 #undef WORD_MACHINE
  48
  49 /* Now define a symbol for the cpu type, if your compiler
  50    does not define it automatically:
  51    Ones defined so far include vax, m68000, ns16000, pyramid,
  52    orion, tahoe, APOLLO and many others */
  53
  54 /* Use type int rather than a union, to represent Lisp_Object */
  55 /* This is desirable for most machines.  */
  56
  57 #define NO_UNION_TYPE
  58
  59 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
  60    the 24-bit bit field into an int.  In other words, if bit fields
  61    are always unsigned.
  62
  63    If you use NO_UNION_TYPE, this flag does not matter.  */
  64
  65 #define EXPLICIT_SIGN_EXTEND
  66
  67 /* Data type of load average, as read out of kmem.  */
  68
  69 #define LOAD_AVE_TYPE long
  70
  71 /* Convert that into an integer that is 100 for a load average of 1.0  */
  72
  73 #define LOAD_AVE_CVT(x) x
  74
  75 /* Define CANNOT_DUMP on machines where unexec does not work.
  76    Then the function dump-emacs will not be defined
  77    and temacs will do (load "loadup") automatically unless told otherwise.  */
  78
  79 /*#define CANNOT_DUMP*/
  80
  81 /* Define VIRT_ADDR_VARIES if the virtual addresses of
  82    pure and impure space as loaded can vary, and even their
  83    relative order cannot be relied on.
  84
  85    Otherwise Emacs assumes that data space precedes text space,
  86    numerically.  */
  87
  88 #undef VIRT_ADDR_VARIES
  89
  90 /* Define C_ALLOCA if this machine does not support a true alloca
  91    and the one written in C should be used instead.
  92    Define HAVE_ALLOCA to say that the system provides a properly
  93    working alloca function and it should be used.
  94    Define neither one if an assembler-language alloca
  95    in the file alloca.s should be used.  */
  96
  97 #define C_ALLOCA
  98 #undef HAVE_ALLOCA
  99
 100 /* The data segment in this machine always starts at address 0x10000000.
 101    An address of data cannot be stored correctly in a Lisp object;
 102    we always lose the high bits.  We must tell XPNTR to add them back.  */
 103
 104 #define DATA_SEG_BITS 0x20000000
 105 #define DATA_START    0x20000000
 106
 107 /* Define NO_REMAP if memory segmentation makes it not work well
 108    to change the boundary between the text section and data section
 109    when Emacs is dumped.  If you define this, the preloaded Lisp
 110    code will not be sharable; but that's better than failing completely.  */
 111
 112 #define NO_REMAP
 113 #define BROKEN_FIONREAD /* We son't even have it */
 114 #define LIBS_MACHINE    -lsocket -lnsl
 115
 116 /* Stack grows downward in memory.  */
 117 #define STACK_DIRECTION -1
 118
 119 /* The data section in a coff file must be aligned in the file.  */
 120 #define DATA_SECTION_ALIGNMENT  0xFFF
 121
 122 /* Compiler won't allow switch (x) when x is an enum.  */
 123 #define SWITCH_ENUM_BUG
 124
 125
 126 /* Explain how pty filenames work.  */
 127
 128 #define PTY_ITERATION  for (i = 47; i >= 0; i--)
 129 #define PTY_NAME_SPRINTF  sprintf (ptyname, "/dev/pty%03x", i);
 130 #define PTY_TTY_NAME_SPRINTF  sprintf (ptyname, "/dev/ptm%03x", i);
 131
 132 /* We can't do interrupt-driven input, so don't let user try.  */
 133
 134 #undef SIGIO