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30fe07a6 JB |
1 | /* Machine-dependent configuration for GNU Emacs for AT&T 3b machines. |
2 | Copyright (C) 1986 Free Software Foundation, Inc. | |
3 | ||
4 | Modified by David Robinson (daver@csvax.caltech.edu) 6/6/86 | |
5 | ||
6 | This file is part of GNU Emacs. | |
7 | ||
8 | GNU Emacs is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
17385adc | 10 | the Free Software Foundation; either version 2, or (at your option) |
30fe07a6 JB |
11 | any later version. |
12 | ||
13 | GNU Emacs is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GNU Emacs; see the file COPYING. If not, write to | |
20 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
21 | ||
22 | ||
23 | /* The following line tells the configuration script what sort of | |
24 | operating system this machine is likely to run. | |
25 | USUAL-OPSYS="usg5-2-2" */ | |
26 | ||
27 | /* The following three symbols give information on | |
28 | the size of various data types. */ | |
29 | ||
30 | #define SHORTBITS 16 /* Number of bits in a short */ | |
31 | ||
32 | #define INTBITS 32 /* Number of bits in an int */ | |
33 | ||
34 | #define LONGBITS 32 /* Number of bits in a long */ | |
35 | ||
74d3f806 KH |
36 | /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word |
37 | is the most significant byte. */ | |
38 | ||
39 | #define WORDS_BIG_ENDIAN | |
40 | ||
30fe07a6 JB |
41 | /* Define NO_ARG_ARRAY if you cannot take the address of the first of a |
42 | * group of arguments and treat it as an array of the arguments. */ | |
43 | ||
44 | /* #define NO_ARG_ARRAY */ | |
45 | ||
46 | /* Define WORD_MACHINE if addresses and such have | |
47 | * to be corrected before they can be used as byte counts. */ | |
48 | ||
49 | /* #define WORD_MACHINE */ | |
50 | ||
30fe07a6 JB |
51 | /* Now define a symbol for the cpu type, if your compiler |
52 | does not define it automatically */ | |
53 | #define ATT3B | |
54 | ||
55 | /* Use type int rather than a union, to represent Lisp_Object */ | |
56 | /* This is desirable for most machines. */ | |
57 | ||
58 | #define NO_UNION_TYPE | |
59 | ||
60 | /* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend | |
61 | the 24-bit bit field into an int. In other words, if bit fields | |
62 | are always unsigned. | |
63 | ||
64 | If you use NO_UNION_TYPE, this flag does not matter. */ | |
65 | ||
66 | #define EXPLICIT_SIGN_EXTEND | |
67 | ||
68 | /* Data type of load average, as read out of kmem. */ | |
69 | /* #define LOAD_AVE_TYPE long */ | |
70 | ||
71 | /* Convert that into an integer that is 100 for a load average of 1.0 */ | |
72 | ||
73 | /* #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE) */ | |
74 | ||
75 | /* Define CANNOT_DUMP on machines where unexec does not work. | |
76 | Then the function dump-emacs will not be defined | |
77 | and temacs will do (load "loadup") automatically unless told otherwise. */ | |
78 | /* #define CANNOT_DUMP */ | |
79 | ||
80 | /* Define VIRT_ADDR_VARIES if the virtual addresses of | |
81 | pure and impure space as loaded can vary, and even their | |
82 | relative order cannot be relied on. | |
83 | ||
84 | Otherwise Emacs assumes that text space precedes data space, | |
85 | numerically. */ | |
86 | ||
87 | /* #define VIRT_ADDR_VARIES */ /* Karl Kleinpaste says this isn't needed. */ | |
88 | ||
89 | /* Define C_ALLOCA if this machine does not support a true alloca | |
90 | and the one written in C should be used instead. | |
91 | Define HAVE_ALLOCA to say that the system provides a properly | |
92 | working alloca function and it should be used. | |
93 | Define neither one if an assembler-language alloca | |
94 | in the file alloca.s should be used. */ | |
95 | ||
96 | /* SysV has alloca in the PW library */ | |
97 | ||
98 | #define LIB_STANDARD -lPW -lc | |
99 | #define HAVE_ALLOCA | |
100 | ||
101 | /* Define NO_REMAP if memory segmentation makes it not work well | |
102 | to change the boundary between the text section and data section | |
103 | when Emacs is dumped. If you define this, the preloaded Lisp | |
104 | code will not be sharable; but that's better than failing completely. */ | |
105 | ||
106 | #define NO_REMAP | |
107 | ||
108 | /* #define LD_SWITCH_MACHINE -N */ | |
109 | ||
110 | /* Use Terminfo, not Termcap. */ | |
111 | ||
112 | #define TERMINFO | |
113 | ||
114 | /* -O has been observed to make correct C code in Emacs not work. | |
115 | So don't try to use it. */ | |
116 | ||
117 | #if u3b2 || u3b5 || u3b15 | |
118 | #define C_OPTIMIZE_SWITCH | |
119 | #endif | |
120 | ||
121 | /* Define our page size. */ | |
122 | ||
123 | #define NBPC 2048 | |
124 | ||
125 | /* The usual definition of XINT, which involves shifting, does not | |
126 | sign-extend properly on this machine. */ | |
127 | ||
128 | #define XINT(i) (((sign_extend_temp=(i)) & 0x00800000) \ | |
129 | ? (sign_extend_temp | 0xFF000000) \ | |
130 | : (sign_extend_temp & 0x00FFFFFF)) | |
131 | ||
eb8c3be9 | 132 | #ifdef emacs /* Don't do this when making xmakefile! */ |
30fe07a6 JB |
133 | extern int sign_extend_temp; |
134 | #endif | |
135 | ||
136 | #if u3b2 || u3b5 || u3b15 | |
137 | ||
138 | /* On 3b2/5/15, data space has high order bit on. */ | |
139 | #define VALMASK (((1<<VALBITS) - 1) | (1 << 31)) | |
140 | #define XTYPE(a) ((enum Lisp_Type) (((a) >> VALBITS) & 0x7F)) | |
141 | #define GCTYPEBITS 5 | |
142 | #define XADDRFIX(a) ((a) |= 0X80000000) /* Because of high order */ | |
143 | ||
144 | #endif /* 3b2, 3b5 or 3b15 */ | |
145 | ||
146 | #define TEXT_START 0 | |
147 | ||
148 | ||
149 | /* For alloca.c (not actually used, since HAVE_ALLOCA) */ | |
150 | #define STACK_DIRECTION 1 | |
151 | ||
152 | /* (short) negative-int doesn't sign-extend correctly */ | |
153 | #define SHORT_CAST_BUG | |
154 | ||
155 | /* 3B2s with WIN/3B have winsize defined in ptem.h */ | |
156 | #if u3b2 | |
157 | #define NEED_PTEM_H | |
158 | #endif /* u3b2 */ | |
b6e1c607 RS |
159 | |
160 | /* 3b2 does not have memmove, I'm told. */ | |
161 | /* It is safe to have no parens around the args in the safe_bcopy call, | |
162 | and parens would screw up the prototype decl for memmove. */ | |
163 | #define memmove(d, s, n) safe_bcopy (s, d, n) | |
c901003d RS |
164 | |
165 | /* This affects filemode.c. */ | |
166 | #define NO_MODE_T |