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20c428fd | 1 | /* machine description file for Whitechapel Computer Works MG1 (ns16000 based). |
aaef169d TTN |
2 | Copyright (C) 1985, 2002, 2003, 2004, 2005, |
3 | 2006 Free Software Foundation, Inc. | |
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4 | MG-1 version by L.M.McLoughlin |
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) |
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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 | |
364c38d3 LK |
20 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
21 | Boston, MA 02110-1301, USA. */ | |
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22 | |
23 | ||
177c0ea7 | 24 | /* The following line tells the configuration script what sort of |
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25 | operating system this machine is likely to run. |
26 | USUAL-OPSYS="note" | |
27 | ||
28 | NOTE-START | |
29 | We are in the dark about what operating system runs on the Whitechapel | |
30 | systems. Consult share-lib/MACHINES for information on which | |
31 | operating systems Emacs has already been ported to; one of them might | |
32 | work. If you find an existing system name that works or write your | |
33 | own configuration files, please let the Free Software Foundation in on | |
34 | your work; we'd like to distribute this information. | |
35 | NOTE-END */ | |
36 | ||
74d3f806 KH |
37 | /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word |
38 | is the most significant byte. */ | |
39 | ||
40 | #undef WORDS_BIG_ENDIAN | |
41 | ||
20c428fd JB |
42 | /* Define NO_ARG_ARRAY if you cannot take the address of the first of a |
43 | * group of arguments and treat it as an array of the arguments. */ | |
44 | /* ns16000 call sequence used on mg1 means that &arg = the args as an array */ | |
45 | #undef NO_ARG_ARRAY | |
46 | ||
47 | /* Define WORD_MACHINE if addresses and such have | |
48 | * to be corrected before they can be used as byte counts. */ | |
49 | /* ns16000 addresses are byte addresses */ | |
50 | #undef WORD_MACHINE | |
51 | ||
20c428fd JB |
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 sequent.h */ | |
94 | #undef VIRT_ADDR_VARIES | |
95 | ||
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96 | /* Define NO_REMAP if memory segmentation makes it not work well |
97 | to change the boundary between the text section and data section | |
98 | when Emacs is dumped. If you define this, the preloaded Lisp | |
99 | code will not be sharable; but that's better than failing completely. */ | |
100 | /* mapping seems screwy */ | |
101 | #define NO_REMAP | |
102 | ||
103 | /* Avoids a compiler bug */ | |
104 | /* borrowed from sequent.h */ | |
ab5796a9 MB |
105 | |
106 | /* arch-tag: e15d9072-9e1a-44bf-8add-966be535967b | |
107 | (do not change this comment) */ |