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This file explains how to install EMILE to boot from a floppy
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How to Create a floppy from rescue disk image
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You can find floppy image from the package emile-rescue
Under linux, the command to dump image to floppy is:
# dd if=emile-rescue-x.y.bin of=/dev/fd0 bs=512 conv=sync
then, you can eject floppy with:
# eject /dev/fd0
If you are using MacOS, use MakeDebianFloppy AppleScript
(you must use a floppy image with a size of exactly 1474560 bytes).
If you are neither using linux, nor MacOS, please refer to rawrite page
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How to Change the kernel boot arguments
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The command to set kernel boot arguments is emile-set-cmdline:
emile-set-cmdline <image> <cmdline>
* <image> is the floppy image or a device file (/dev/fd0) to set
* <cmdline> is new kernel boot arguments
For instance, to set root filesystem on disk 1 partition 4
# emile-set-cmdline floppy.img "root=/dev/sda4"
To set root filesystem on ramdisk
# emile-set-cmdline floppy.img "root=/dev/ramdisk ramdisk_size=2048"
To set root filesystem on NFS
# emile-set-cmdline floppy.img \
"root=/dev/nfs ip=dhcp nfsroot=192.168.100.1:/tftboot/192.168.100.51/"
You can also read current boot arguments from floppy:
# emile-set-cmdline -r /dev/fd0
Current command line: "root=/dev/ramdisk ramdisk_size=2048"
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How to Create your floppy image with your kernel
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First of all, you must "flatten" the kernel object:
# objcopy -I elf32-big -O binary -R .note -R .comment -S vmlinux vmlinux.bin
To allocate correct buffer size during uncompress, EMILE needs to know the size of flattened kernel:
# ls -l vmlinux.bin
-rwxr-xr-x 1 m68k users 1290240 2004-06-09 22:41 vmlinux.bin
You can now compress kernel with gzip (bzip2 is not supported by EMILE):
# gzip -9 vmlinux.bin
You can copy first and second level bootloader and kernel to floppy:
# emile-install -f first -s second -i vmlinux.bin.gz -b 1290240 /dev/fd0
And finally, you can set kernel boot arguments:
# emile-set-cmdline /dev/fd0 "root=/dev/sda4"
If you have a ramdisk, the two last steps become:
# emile-install -f first -s second -i vmlinux.bin.gz -b 1290240 -r ramdisk.gz /dev/fd0
# emile-set-cmdline /dev/fd0 "root=/dev/ramdisk ramdisk_size=2048"
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Laurent Vivier <LaurentVivier@wanadoo.fr>
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