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- /* m- file for ISI 68000's
- Copyright (C) 1985, 1986 Free Software Foundation, Inc.
-
- This file is part of GNU Emacs.
-
- GNU Emacs is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 1, or (at your option)
- any later version.
-
- GNU Emacs is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNU Emacs; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-
- #define ISI68K
-
- /* The following three symbols give information on
- the size of various data types. */
-
- #define SHORTBITS 16 /* Number of bits in a short */
-
- #define INTBITS 32 /* Number of bits in an int */
-
- #define LONGBITS 32 /* Number of bits in a long */
-
- /* 68000 has lowest-numbered byte as most significant */
-
- #define BIG_ENDIAN
-
- /* Define how to take a char and sign-extend into an int.
- On machines where char is signed, this is a no-op. */
-
- #define SIGN_EXTEND_CHAR(c) (c)
-
- /* Say this machine is a 68000 */
-
- #define m68000
-
- /* Use type int rather than a union, to represent Lisp_Object */
-
- #define NO_UNION_TYPE
-
- /* XINT must explicitly sign-extend */
-
- #define EXPLICIT_SIGN_EXTEND
-
- /* Data type of load average, as read out of kmem. */
-
- #ifdef BSD4_3
- #define LOAD_AVE_TYPE long
- #else
- #define LOAD_AVE_TYPE double
- #endif BSD4_3
-
- /* Convert that into an integer that is 100 for a load average of 1.0 */
-
- #ifdef BSD4_3
- #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
- #else
- #define LOAD_AVE_CVT(x) ((int) ((x) * 100.0))
- #endif
-
- /* Mask for address bits within a memory segment */
-
- #define SEGMENT_MASK 0x1ffff
-
- /* use the -20 switch to get the 68020 code */
- /* #define C_SWITCH_MACHINE -20 */
-
- /* Use the version of the library for the 68020
- because the standard library requires some special hacks in crt0
- which the GNU crt0 does not have. */
-
- #define LIB_STANDARD -lmc
-
- /* macros to make unexec work right */
-
- #define A_TEXT_OFFSET(HDR) sizeof(HDR)
- #define A_TEXT_SEEK(HDR) sizeof(HDR)
-
- /* A few changes for the newer systems. */
-
- #ifdef BSD4_3
- #define HAVE_ALLOCA
- /* The following line affects crt0.c. */
- #undef m68k
-
- #undef LIB_STANDARD
- #define LIB_STANDARD -lmc -lc
- #define C_DEBUG_SWITCH -20 -O -X23
- #endif
-