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Diffstat (limited to 'src/m/isi-ov.h')
-rw-r--r-- | src/m/isi-ov.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/src/m/isi-ov.h b/src/m/isi-ov.h new file mode 100644 index 00000000000..2f30f7f2606 --- /dev/null +++ b/src/m/isi-ov.h @@ -0,0 +1,105 @@ +/* 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 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. */ + + +/* 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 + +/* 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 |