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Annotation of 43BSDReno/contrib/emacs-18.55/src/m-mg1.h, revision 1.1

1.1     ! root        1: /* m- file for Whitechapel Computer Works MG1 (ns16000 based).
        !             2:    Copyright (C) 1985 Free Software Foundation, Inc.
        !             3:    MG-1 version by L.M.McLoughlin
        !             4: 
        !             5: This file is part of GNU Emacs.
        !             6: 
        !             7: GNU Emacs is distributed in the hope that it will be useful,
        !             8: but WITHOUT ANY WARRANTY.  No author or distributor
        !             9: accepts responsibility to anyone for the consequences of using it
        !            10: or for whether it serves any particular purpose or works at all,
        !            11: unless he says so in writing.  Refer to the GNU Emacs General Public
        !            12: License for full details.
        !            13: 
        !            14: Everyone is granted permission to copy, modify and redistribute
        !            15: GNU Emacs, but only under the conditions described in the
        !            16: GNU Emacs General Public License.   A copy of this license is
        !            17: supposed to have been given to you along with GNU Emacs so you
        !            18: can know your rights and responsibilities.  It should be in a
        !            19: file named COPYING.  Among other things, the copyright notice
        !            20: and this notice must be preserved on all copies.  */
        !            21: 
        !            22: 
        !            23: /* The following three symbols give information on
        !            24:  the size of various data types.  */
        !            25: 
        !            26: #define SHORTBITS 16           /* Number of bits in a short */
        !            27: 
        !            28: #define INTBITS 32             /* Number of bits in an int */
        !            29: 
        !            30: #define LONGBITS 32            /* Number of bits in a long */
        !            31: 
        !            32: /* Define BIG_ENDIAN iff lowest-numbered byte in a word
        !            33:    is the most significant byte.  */
        !            34: /* ns16000 is not big-endian: lowest numbered byte is least significant. */
        !            35: #undef BIG_ENDIAN
        !            36: 
        !            37: /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
        !            38:  * group of arguments and treat it as an array of the arguments.  */
        !            39: /* ns16000 call sequence used on mg1 means that &arg = the args as an array */
        !            40: #undef NO_ARG_ARRAY
        !            41: 
        !            42: /* Define WORD_MACHINE if addresses and such have
        !            43:  * to be corrected before they can be used as byte counts.  */
        !            44: /* ns16000 addresses are byte addresses */
        !            45: #undef WORD_MACHINE
        !            46: 
        !            47: /* Define how to take a char and sign-extend into an int.
        !            48:    On machines where char is signed, this is a no-op.  */
        !            49: 
        !            50: #define SIGN_EXTEND_CHAR(c) (c)
        !            51: 
        !            52: /* Now define a symbol for the cpu type, if your compiler
        !            53:    does not define it automatically:
        !            54:    vax, m68000, ns16000, pyramid, orion, tahoe and APOLLO
        !            55:    are the ones defined so far.  */
        !            56: /* Say this machine is a 16000 and an mg1, cpp says its a 32000 */
        !            57: #define ns16000
        !            58: #define mg1
        !            59: 
        !            60: /* Use type int rather than a union, to represent Lisp_Object */
        !            61: /* This is desirable for most machines.  */
        !            62: /* Not sure on mg-1 but this shouldn't hurt! */
        !            63: #define NO_UNION_TYPE
        !            64: 
        !            65: /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
        !            66:    the 24-bit bit field into an int.  In other words, if bit fields
        !            67:    are always unsigned.
        !            68: 
        !            69:    If you use NO_UNION_TYPE, this flag does not matter.  */
        !            70: 
        !            71: #define EXPLICIT_SIGN_EXTEND
        !            72: 
        !            73: /* Data type of load average, as read out of kmem.  */
        !            74: /* mg1 its an unsigned long */
        !            75: #define LOAD_AVE_TYPE unsigned long
        !            76: 
        !            77: /* Convert that into an integer that is 100 for a load average of 1.0  */
        !            78: #define        FSCALE  1000.0
        !            79: #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
        !            80: 
        !            81: /* Define CANNOT_DUMP on machines where unexec does not work.
        !            82:    Then the function dump-emacs will not be defined
        !            83:    and temacs will do (load "loadup") automatically unless told otherwise.  */
        !            84: /* ns16000's have an unexec, so should the mg-1 */
        !            85: #undef CANNOT_DUMP
        !            86: 
        !            87: /* Define VIRT_ADDR_VARIES if the virtual addresses of
        !            88:    pure and impure space as loaded can vary, and even their
        !            89:    relative order cannot be relied on.
        !            90: 
        !            91:    Otherwise Emacs assumes that text space precedes data space,
        !            92:    numerically.  */
        !            93: /* hmmmm... not sure.  copied m-sequent.h */
        !            94: #undef VIRT_ADDR_VARIES
        !            95: 
        !            96: /* Define C_ALLOCA if this machine does not support a true alloca
        !            97:    and the one written in C should be used instead.
        !            98:    Define HAVE_ALLOCA to say that the system provides a properly
        !            99:    working alloca function and it should be used.
        !           100:    Define neither one if an assembler-language alloca
        !           101:    in the file alloca.s should be used.  */
        !           102: /* hmmmm... again not sure.  so copied m-sequent.h again! */
        !           103: #undef C_ALLOCA
        !           104: #undef HAVE_ALLOCA
        !           105: 
        !           106: /* Define NO_REMAP if memory segmentation makes it not work well
        !           107:    to change the boundary between the text section and data section
        !           108:    when Emacs is dumped.  If you define this, the preloaded Lisp
        !           109:    code will not be sharable; but that's better than failing completely.  */
        !           110: /* mapping seems screwy */
        !           111: #define NO_REMAP
        !           112: 
        !           113: /* Avoids a compiler bug */
        !           114: /* borrowed from m-sequent.h */

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