/* machine description file for Gould PowerNodes with UTX/32 2.0 and 2.1.
   (See MACHINES for older versions.)

* NOTE: If you are running a pre-release of UTX/32 2.1 you should #define
* RELEASE2_1 in config.h. This may also be necessary with un-updated
* official releases of 2.1

   Copyright (C) 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
Gould Power Node (-machine=gould -opsystem=bsd4-2 or bsd4-3)
(gould.h; s-bsd4-2.h or s-bsd4-3.h)

  18.36 worked on versions 1.2 and 2.0 of the operating system.

  On UTX/32 2.0, use -opsystem=bsd4-3

  On UTX/32 1.2 and UTX/32S 1.0, use -opsystem=bsd4-2 and note that compiling 
  lib-src/sorted-doc tickles a compiler bug:  remove the -g flag to cc in the 
  makefile.

  UTX/32 1.3 has a bug in the bcopy library routine.  Fix it by 
  #undef BSTRING in gould.h.

  Version 19 incorporates support for releases 2.1 and later of UTX/32.
  A site running a pre-release of 2.1 should #define RELEASE2_1 in config.h.
NOTE-END */

/* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
   is the most significant byte.  */

#define WORDS_BIG_ENDIAN

/* Define NO_ARG_ARRAY if you cannot take the address of the first of a
 * group of arguments and treat it as an array of the arguments.  */

#define NO_ARG_ARRAY

/* 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 */

#ifndef GOULD
#define GOULD
#endif

/* sel is an old preprocessor name on gould machines 
  - it is no longer needed and interferes with a variable in xmenu.c */
#undef sel

/* 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 24-bit 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 double

/* 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)

/* 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

/* 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.  */

#define C_ALLOCA
#define	STACK_DIRECTION	-1  /* grows towards lower addresses on Gould UTX/32 */

/* No need to extend the user stack. */

/* If this is a 2.1 system, COFF will be predefined by cpp. If it's */
/* pre-2.1 COFF won't be defined, which is as it should be. */

#ifdef COFF

#define HEADER_INCL_IN_TEXT
#define COFF_BSD_SYMBOLS

/* Seems to be necessary with coff */
#define NO_REMAP

#ifndef GOULD_NP1
/* gould-np1.h includes this file */
/* keep the old value - don't skip over the headers */
#define KEEP_OLD_TEXT_SCNPTR
#define KEEP_OLD_PADDR
#ifndef RELEASE2_1
#define ADJUST_TEXTBASE
#endif /*RELEASE2_1*/
#endif /* GOULD_NP1 */

#ifdef IN_UNEXEC
/* make Gould NP and PN COFF look like USG COFF */
/* PN COFF */
#define aouthdr old_exec
/* PN COFF doesn't have a data_start or a_dtbase field in its */
/* optional header, so substitute a junk field */
#define a_dtbase a_ccvers
/* Gould COFF */
#define magic a_magic
#define tsize a_text
#define dsize a_data
#define bsize a_bss
#define entry a_entry
#define text_start a_txbase
#define data_start a_dtbase
#endif /* IN_UNEXEC */

/* Define how to search all pty names.
 * This is for UTX 2.1 and greater on PN and all NP versions. It is only
 * accident that this happens to correspond to the same versions of UTX
 * as COFF does, but we'll take advantage of that here.
 */

/*#define USE_PTY_PAIR*/

#endif /* COFF */

/* -g is sometimes broken on the Gould.  */

#define C_DEBUG_SWITCH

/* Comparing pointers as unsigned ints tickles a bug in older compilers.  */

#define PNTR_COMPARISON_TYPE int

/* The GOULD machine counts the a.out file header as part of the text.  */

#define A_TEXT_OFFSET(HDR) sizeof (HDR)

/* Machine-dependent action when about to dump an executable file.  */

#ifndef COFF
#define ADJUST_EXEC_HEADER   \
  unexec_text_start = hdr.a_txbase + sizeof (hdr);
#endif

/* We use the system's crt0.o.  Somehow it avoids losing
   with `environ' the way most standard crt0.o's do.  */

#define START_FILES pre-crt0.o /lib/crt0.o
