1 /* machine description file for Masscomp 5000 series running RTU, ucb universe.
2 Copyright (C) 1986 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
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)
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.
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. */
21 /* The following line tells the configuration script what sort of
22 operating system this machine is likely to run.
25 /* The following three symbols give information on
26 the size of various data types. */
28 #define SHORTBITS 16 /* Number of bits in a short */
30 #define INTBITS 32 /* Number of bits in an int */
32 #define LONGBITS 32 /* Number of bits in a long */
34 /* Define BIG_ENDIAN iff lowest-numbered byte in a word
35 is the most significant byte. */
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. */
44 /* Define WORD_MACHINE if addresses and such have
45 * to be corrected before they can be used as byte counts. */
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 /* Masscomp predefines mc68000. */
54 #define m68000 mc68000
56 /* Use type int rather than a union, to represent Lisp_Object */
57 /* This is desirable for most machines. */
61 /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
62 the 24-bit bit field into an int. In other words, if bit fields
65 If you use NO_UNION_TYPE, this flag does not matter. */
67 #undef EXPLICIT_SIGN_EXTEND
69 /* Data type of load average, as read out of kmem. */
71 #define LOAD_AVE_TYPE double
73 /* Convert that into an integer that is 100 for a load average of 1.0 */
75 #define LOAD_AVE_CVT(x) ((int) ((x) * 100.0))
77 /* Define CANNOT_DUMP on machines where unexec does not work.
78 Then the function dump-emacs will not be defined
79 and temacs will do (load "loadup") automatically unless told otherwise. */
83 /* Define VIRT_ADDR_VARIES if the virtual addresses of
84 pure and impure space as loaded can vary, and even their
85 relative order cannot be relied on.
87 Otherwise Emacs assumes that text space precedes data space,
90 #undef VIRT_ADDR_VARIES
92 /* Define C_ALLOCA if this machine does not support a true alloca
93 and the one written in C should be used instead.
94 Define HAVE_ALLOCA to say that the system provides a properly
95 working alloca function and it should be used.
96 Define neither one if an assembler-language alloca
97 in the file alloca.s should be used. */
99 /* On return from a subroutine, the 68020 compiler restores old contents of
100 register variables relative to sp, so alloca() screws up such routines.
101 The following definitions should work on all Masscomps. On the MC-5500
102 (a 68000) one can #undef C_ALLOCA and #define HAVE_ALLOCA. */
111 /* Define NO_REMAP if memory segmentation makes it not work well
112 to change the boundary between the text section and data section
113 when Emacs is dumped. If you define this, the preloaded Lisp
114 code will not be sharable; but that's better than failing completely. */
118 /* crt0.c should use the vax-bsd style of entry, with a dummy arg. */
120 #define CRT0_DUMMIES bogus_fp,
122 /* Name of file the to look in
123 for the kernel symbol table (for load average) */
125 #define KERNEL_FILE "/unix"
127 /* This triggers some stuff to avoid a compiler bug */
129 #define MASSC_REGISTER_BUG
131 /* Prevent -lg from being used for debugging. Not implemented? */
136 * Define HAVE_TERMIO if the system provides sysV-style ioctls
137 * for terminal control.
142 /* Adjust a header field for the executable file about to be dumped. */
144 #define ADJUST_EXEC_HEADER \
145 hdr.a_stamp = STAMP13; /* really want the latest stamp, whatever it is */