/* machine description 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 2, 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, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* The following line tells the configuration script what sort of operating system this machine is likely to run. USUAL-OPSYS="note" NOTE-START Use `-opsystem=bsd4-2' or `-opsystem=bsd4-3'. NOTE-END */ #define ISI68K /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word is the most significant byte. */ #define WORDS_BIG_ENDIAN /* 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