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a933dad1 DL |
1 | Date: Mon, 16 Feb 87 15:04:41 EST |
2 | From: katinsky@gauss.rutgers.edu (David Katinsky) | |
3 | To: rms@prep.ai.mit.edu | |
4 | Subject: 3b2 procedure to raise MAXMEM | |
5 | ||
6 | Below is the procedure I followed to allow enough memory for GnuEmacs to run | |
7 | on my 3b2/400. The end result of this is that a process can snarf up to 2Mb | |
8 | of memory. This can be a bit dangerous on a 2Mb machine, but I tried it and | |
9 | it worked ok. | |
10 | ||
11 | ------------------------------------------------------------------------------- | |
12 | ||
13 | In the simplest case, these are the procedures to reconfigure a 3bx kernel. | |
14 | ||
15 | ||
16 | ||
17 | 1] cd /etc/master.d | |
18 | ||
19 | `ls` shows the files to be: | |
20 | ||
21 | README ctc* hdelog idisk ipc iuart kernel mau | |
22 | mem msg ports* prf sem shm stubs sxt | |
23 | sys xt | |
24 | ||
25 | 2] Edit the file which contains the parameter[s] you wish to change. | |
26 | In the following excerpt from /etc/master.d/kernel the value MAXMEM | |
27 | was raised from 256 to 1024. | |
28 | ||
29 | In V.3.0 and later releases, the parameter in question is MAXUMEM | |
30 | instead of MAXMEM. | |
31 | ||
32 | ||
33 | * | |
34 | * The following entries form the tunable parameter table. | |
35 | * | |
36 | ||
37 | ||
38 | NCALL = 30 | |
39 | NPROC = 60 | |
40 | NTEXT = 58 | |
41 | NCLIST = 188 | |
42 | * maxmem is number of pages (2K) was 256 --dmk | |
43 | MAXMEM = 1024 | |
44 | MAXUP = 25 | |
45 | * hashbuf must be a power of 2 | |
46 | NHBUF = 128 | |
47 | NPBUF = 8 | |
48 | ||
49 | 3] cd /boot | |
50 | ||
51 | 4] mkboot -k KERNEL | |
52 | ||
53 | 5] shutdown -i5 -g0 -y | |
54 | ||
55 | This will take the machine down and bring it back up into firmware | |
56 | mode. When you see that the machine has reached this state, type the | |
57 | firmware password (default=mcp). The machine will ask for the name of | |
58 | a program to execute. At this prompt enter /etc/system . The machine | |
59 | should start to boot and display its configuration data. | |
60 | ||
61 | ||
62 | ||
63 | 8701271222 dmk | |
64 | ||
65 | [katinsky@topaz.rutgers.edu] | |
66 | ------------------------------------------------------------------------------- | |
67 | ||
68 | ||
69 | ||
70 | I do not feel that having the default firmware password is a | |
71 | problem... but if you wish to edit it out, feel free. | |
72 | ||
73 | dmk | |
74 | ||
75 | \1f |