On this page ...
How can I change the background image
of my Yamakawa ?
The Yamakawa rom includes the background
image you see when you switch the player on,as show in the screenshot
Read the Disclaimer!
Tip: consider visiting the Yamakawa
DVD group at Yahoo groups!
Before you start ...
There is a neat trick to change this image to a drawing
you made, for example, with Photoshop.
On this page I only explain how to put your image in the rom file.
Details for updating your firmware and risks that come
with that ares explained on the Yamakawa
Firmware Update page.
Note: you will need a firmware rom file
and a firmware password file. Download
version 3H here.
Step 1; Get the right files
For injecting a new image in the rom file, you will
need a tool to help you with that. YST is such a tool, download
version 0.99a here. Unfortunally the YST homehape is dead,... so this
is it ...
You will also need, as mentioned before, the ROM files,
download version 3H here. You can also visit the Yamakawa
Firmware Update page to find out what I'm talking about and where
to get different versions.
Step 2; Create a drawing
You will now need a bitmap/image with the dimensions
704 x 576. The image can be 24 bits in depth.
You can draw this in your favorite drawing program like
Photoshop, Corel PhotoPaint, MSPaint, etc. Save the image as a BMP, make
sure you do not use RLE compression.
This is the image I used for testing, click on it to
download the zipped image;
Step 3; Get image and convert it
Now we start the YST tool which you just downloaded.
If you didn't do so yet, please unzip the file, for example using WinZip.
Double click the "YST099a.exe" icon
to start YST.
First we set the "Firmware" to "USER".
Next we select the BMP image we created in step 2 uding
the "..." button next to "BMP-File".
Now you check "Auto" and set "Rate"
Now press the "Convert BMP" button which will convert
the BMP to a BIN format. This will take a while and you will see "Please
Wait ..." on the "Convert BMP" button. You will
also see the "Rate" field increase up to a value until
size ("Kb") reached appr. 17 Kb.
Depending on the complexity of the source BMP image
it can take a while (I have seen "18" and "31"
in the "Rate" field).
If you used a wrong file format, an error will occure.
As soon as conversion is done, you will notice 3 additional buttons called
"Preview", "BIN Preview" and "Save".
Also a dropdownbox appears as shown in the screenshot below:
You can use "Preview" to review the
selected original BMP, and "BINPreview" to see the converted
Note: Do not use the "Close Window"
cross when using "Preview", it will close the program
! Simply click on the image shown.
Step 4; Insert the image in the ROM file
Now you can select the rom file you want the picture
to be inserted to by pressing the "..." button. Before
you do so, make sure the ROM file is NOT set to READ-ONLY. If the
file is read-only an error will ocure as shown below:
It might happen that the firmware you are using is not
yet analyzed by YST. YST needs this to locate the start-position in the
rom-file of the current image, so it knows where to put the new image
without damaging the actual rom-code. My first attempt confused me too,
since there is no additional information, like a readme.txt, that explains
what is going wrong.
If "Version" in the lower right corner, does not show
the version (default 3C) you are using (I used 3H for this
purpose) the you should click the "Search Position and Size"
button to locate the proper image start position.
After a few seconds a requester will popup asking you
to save the values in the INI file.
Note: "PicSize" should be appr. 17
Kb, other (definitly larger) values indicate a FAILURE ! Restart YST to
get a proper value !
Select "Yes" so the value is saved
for future use.
Now set your preferences for "Name"
(Yamakawa), "Model" (715), "Mode"
(PAL) and "Language" (English).
You can ignore the "3C" in the "Version"
field in the lower right corner if you used the "Search Position
and Size" button. Maybe in a future version this value will be
updated automatically ... who knows ...
Click now the "Insert Picture" button.
A message (shown below) confirms the succesfull insertion of the image:
Now you're almost finished. The ROM file is ready for
use, we still need to change the "APASSWD" file.
Step 5; Adapt "Apasswd" file
We still need to adapt the "apasswd"
file, use "Create APASSWD" to do so. The "apasswd"
file, that came with the rom file will be altered for this purpose !
If you want more information, then please take a look
at the Yamakawa Update
Firmware page, section "Edit password file".
Step 6; Update firmware
Please take a look at the Yamakawa
Firmware Update page on how to use these rom and apasswd files.
After updating the firmware, my Yamakawa now boots using
my own image: