etc/3B-MAXMEM

   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