boot/a.out2com

   1 #!/bin/sh
   2 #
   3 #       a.out2com - Minix a.out to DOS .COM             Author: Kees J. Bot
   4 #                                                               17 Jun 1995
   5 # Transform a Minix a.out to the COM format of MS-DOS,
   6 # the executable must be common I&D with 256 scratch bytes at the start of
   7 # the text segment to make space for the Program Segment Prefix.  The Minix
   8 # a.out header and these 256 bytes are removed to make a COM file.
   9
  10 case $# in
  11 2)      aout="$1"
  12         com="$2"
  13         ;;
  14 *)      echo "Usage: $0 <a.out> <dos.com>" >&2
  15         exit 1
  16 esac
  17
  18 size "$aout" >/dev/null || exit
  19 set `size "$aout" | sed 1d`
  20 count=`expr \( $1 + $2 - 256 + 31 \) / 32`
  21
  22 exec dd if="$aout" of="$com" bs=32 skip=9 count=$count conv=silent
  23
  24 #
  25 # $PchId: a.out2com,v 1.3 1998/08/01 09:13:01 philip Exp $