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- /* Machine-dependent configuration for GNU Emacs for AT&T 3b machines.
- Copyright (C) 1986 Free Software Foundation, Inc.
-
- Modified by David Robinson (daver@csvax.caltech.edu) 6/6/86
-
- 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /* Synched up with: FSF 19.29. */
-
- /* The following line tells the configuration script what sort of
- operating system this machine is likely to run.
- USUAL-OPSYS="usg5-2-2" */
-
- /* Define WORD_MACHINE if addresses and such have
- * to be corrected before they can be used as byte counts. */
-
- /* #define WORD_MACHINE */
-
- /* Now define a symbol for the cpu type, if your compiler
- does not define it automatically */
- #define ATT3B
-
- /* Use type int rather than a union, to represent Lisp_Object */
- /* This is desirable for most machines. */
-
- #define NO_UNION_TYPE
-
- /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
- the bit field into an int. In other words, if bit fields
- are always unsigned.
-
- If you use NO_UNION_TYPE, this flag does not matter. */
-
- #define EXPLICIT_SIGN_EXTEND
-
- /* Data type of load average, as read out of kmem. */
- /* #define LOAD_AVE_TYPE long */
-
- /* Convert that into an integer that is 100 for a load average of 1.0 */
-
- /* #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE) */
-
- /* Define CANNOT_DUMP on machines where unexec does not work.
- Then the function dump-emacs will not be defined
- and temacs will do (load "loadup") automatically unless told otherwise. */
- /* #define CANNOT_DUMP */
-
- /* Define VIRT_ADDR_VARIES if the virtual addresses of
- pure and impure space as loaded can vary, and even their
- relative order cannot be relied on.
-
- Otherwise Emacs assumes that text space precedes data space,
- numerically. */
-
- /* #define VIRT_ADDR_VARIES */ /* Karl Kleinpaste says this isn't needed. */
-
- /* Define C_ALLOCA if this machine does not support a true alloca
- and the one written in C should be used instead.
- Define HAVE_ALLOCA to say that the system provides a properly
- working alloca function and it should be used.
- Define neither one if an assembler-language alloca
- in the file alloca.s should be used. */
-
- /* SysV has alloca in the PW library */
-
- #define LIB_STANDARD -lPW -lc
- #define HAVE_ALLOCA
-
- /* Define NO_REMAP if memory segmentation makes it not work well
- to change the boundary between the text section and data section
- when Emacs is dumped. If you define this, the preloaded Lisp
- code will not be sharable; but that's better than failing completely. */
-
- #define NO_REMAP
-
- /* #define LD_SWITCH_MACHINE -N */
-
- /* Use Terminfo, not Termcap. */
-
- #define TERMINFO
-
- /* -O has been observed to make correct C code in Emacs not work.
- So don't try to use it. */
-
- #if u3b2 || u3b5 || u3b15
- #define C_OPTIMIZE_SWITCH
- #endif
-
- /* Define our page size. */
-
- #define NBPC 2048
-
- /* The usual definition of XINT, which involves shifting, does not
- sign-extend properly on this machine. */
-
- #define XINT(i) (((sign_extend_temp=(i)) & 0x00800000) \
- ? (sign_extend_temp | 0xFF000000) \
- : (sign_extend_temp & 0x00FFFFFF))
-
- #ifdef emacs /* Don't do this when making xmakefile! */
- extern int sign_extend_temp;
- #endif
-
- #if u3b2 || u3b5 || u3b15
-
- /* On 3b2/5/15, data space has high order bit on. */
- #define VALBITS 27
- #define VALMASK (((1<<VALBITS) - 1) | (1 << 31))
- #define XTYPE(a) ((enum Lisp_Type) (((a) >> VALBITS) & GCTYPEMASK))
-
- #endif /* 3b2, 3b5 or 3b15 */
-
- #define TEXT_START 0
-
-
- /* For alloca.c (not actually used, since HAVE_ALLOCA) */
- #define STACK_DIRECTION 1
-
- /* (short) negative-int doesn't sign-extend correctly */
- #define SHORT_CAST_BUG
-
- /* 3B2s with WIN/3B have winsize defined in ptem.h */
- #if u3b2
- #define NEED_PTEM_H
- #endif /* u3b2 */
-
- /* 3b2 does not have memmove, I'm told. */
- /* It is safe to have no parens around the args in the safe_bcopy call,
- and parens would screw up the prototype decl for memmove. */
- #define memmove(d, s, n) safe_bcopy (s, d, n)
-
- /* This affects filemode.c. */
- #define NO_MODE_T
-