How to make a KiSS bootable ISO firmware with mkisofs under linux ?
O/ Why ?
The reason why I wrote this is that I am on the (long) way to port
Freevo on my KiSS PVR.
I'm doing this because I'm really unsatisfied by the software provided
by KiSS technology which is totally bugged.
Because this is a closed software (You don't have acces to all the
sources) it is impossible to fix these bugs.
I will try to add material here each time I will succeed in a step to
Help would be greatly appreciated, you can contact me here
1/ Get a boot image
First, you need to obtain an image of the boot loader from an original
Original firmware can be downloaded from the KiSS
Technology web site.
You should get a ZIP file containing the original ISO image of the
We will extract the boot loader from this ISO.
There are two way of doing this :
First methode : isoinfo + dd
run isoinfo to print information from
the primary volume descriptor
% isoinfo -d -i DP-1500-293-050604-1435.iso
CD-ROM is in ISO 9660 format
System id: LINUX
Volume id: KiSS DP-xxx
Volume set id:
Publisher id: KiSS Technology A/S
Data preparer id:
Application id: MKISOFS ISO 9660/HFS FILESYSTEM BUILDER & CDRECORD
CD-R/DVD CREATOR (C) 1993 E.YOUNGDALE (C) 1997 J.PEARSON/J.SCHILLING
Copyright File id:
Abstract File id:
Bibliographic File id:
Volume set size is: 1
Volume set sequence number is: 1
Logical block size is: 2048
<==== (1) Block
size on the ISO
Volume size is: 2485
El Torito VD version 1 found, boot catalog is in sector 2365
NO Joliet present
NO Rock Ridge present
Eltorito validation header:
Arch 3 (Unknown Arch)
ID 'KiSS Technology
Key 55 AA
Eltorito defaultboot header:
Bootid 88 (bootable)
Boot media 0 (No Emulation
Load segment 0
Sys type 0
<==== (2) 0x237=567 blocks (boot loader size in
0x706=1798 blocks offset (first boot loader block on the ISO)
Now You know that you just have to
extract 567 blocks of 2048 bytes
starting at 1798 blocks of 2048 byte from the ISO beginning.
Copy it in your source tree :
% dd if=DP-1500-293-050604-1435.iso
of=My-firmware-direcory/boot-loader/boot.image_0 bs=2048 count=567
Second way : cdfs
First install cdfs on your system (Here
you can find information
Next, mount the original KiSS ISO on a directory using cdfs :
# mount -t cdfs /dec/cdrom /mnt
Now, you can simply copy the boot image to your source tree :
% cp /mnt/boot.image_0
2/ Patch mkisofs
To successfully make a KiSS ISO you will have to explain to mkisofs how
to set the Arch type to 3 as you could have notice when using isoinfo.
You must explain it too how deal with the virtual sector size for the
El Torito boot record.
Fortunately, Albert SEWARD and Erik THYREN provided a Patch
for mkisofs on their KiSS page where
they did a very good reverse engineering job !!
I have just added the use of a command line option (-kiss) to activate
this only when needed in this patch
Ok, let's download
the mkisofs sources wich is in fact a part of cdrtools.
Alternatively, if you are a Debian user, you should use apt-get sources mkisofs.
Next, cd to the mkisofs source directory and apply the patch :
% patch -p1 < KiSS-mkisofs.diff
Then, make and install the new mkisofs version by using instructions
found in the INSTALL file at the root of the cdrtools.
Again, Debian users should dpkg-buildpackage
and dpkg -i mkisofs__something.deb.
3/ Using the good mkisofs options
Here we are !
I spent many days to read output from isoinfo, isodump and even hexdump
of KiSS ISOs to understand why my own ISOs was not booting. But
eventualy, I succed to write the magic command line that do the job !
First you have to put in a directory all the material you want tu put
on the CD (Kiss original files plus your modified romfs.bin).
Don't forget to create the boot-loader directory and copy the
boot-loader in it !
Next change directory to this one and create the bootble ISO :
%mkisofs -no-pad -allow-lowercase
-iso-level 4 \
boot-loader/boot.image_0 -c boot-loader/boot.cat -hide boot* \
-no-emul-boot -V "KiSS DP-xxx" -publisher 'KiSS Technology
A/S ' \
Be sure to not forget the 5 leadinf spaces at the end of the publisher
That's all falks !
You just have to burn a CD using cdrecord (rewritable works perfectly)
and try a run ...