Need help reverse engineering 16bit Windows app / Binary EEPROM BOSCH 607 - GSM-Forum

n4spd · 02-27-2022, 03:21

Hello all !

I want to create an aplication for change start up logo on old phone EEPROM (1997 Bosch COM 607).

I do know is a very old phone but it can serve as good start for retro modding knowledge because supposably is simpler because of age.

So, I did spent a lot of time trying to figure out how to disassamble the .BIN EEPROM file using IDA Pro and Ghidra with no real success.

I managed to find out that this phone is using Siemens C166 processor.
In IDA Pro I managed to disassemble the file but I cannot find the entry point for correctly disassamble the file.

Second, I tried to open as binary and try to locate the logo area by selecting small chunks of binary and convert in 1bit image, with no luck.

I tried using HEX converter to see the instruction calls from processor c166 with adresses but I cannot find the correct encoding..

I also have an old 16bit Windows app (Bosch-G Logo graphics viewer) which you can view the current logo inside the EEPROM but can not make any changes except invert colors..

For the sake of good old GSM times..can somebody help me identify the correct addresses and how to modify this file ?

Many thanks !

I attached to EEPROM binary for Bosch COM 607 (remove .TXT from name - forum limitation)

n4spd · 02-27-2022, 03:23

Any help or idea is greatly appreciated !

Nishith · 02-28-2022, 12:52

I don't exactly remember the tool name, but try to find some bin editor, which will help you to extract the resources from the bin fw file and repack the bin file with correct checksum, etc.

I used it years ago to modify some Samsung Firmware, But right now I don't remember any details.

n4spd · 02-28-2022, 18:42

Right now I use HEX editor but i cannot figure out the encoding used for binary file. C166 i am not sure is using checksum. I was trying to use a binary to inage converter but cannot find anywhre on the web.. there is one website who provide a tool to convert binary to image but no image show up... At some point somebody sugested to use Siemens Smelter because of compatibility with the C166 but still no luck.. I even tried Siemens Image Viewer for C35 series (uses C166 processor) but cannot recognize the bin. If you remember the tool please write back. I plan to make a ibternational website with 1000+ reto tools for modify the old phones free of charge.. thousand of logos, java games and mods. Big thanks for any help.

02-27-2022, 03:23	#2 (permalink)
n4spd Junior Member Join Date: Feb 2021 Location: Constanta Posts: 19 Member: 2982260 Status: Offline Thanks Meter: 0	Any help or idea is greatly appreciated !

02-28-2022, 12:52	#3 (permalink)
Nishith No Life Poster Join Date: May 2012 Location: BHARAT Posts: 1,571 Member: 1766148 Status: Offline Sonork: 100.1614494 Thanks Meter: 490	I don't exactly remember the tool name, but try to find some bin editor, which will help you to extract the resources from the bin fw file and repack the bin file with correct checksum, etc. I used it years ago to modify some Samsung Firmware, But right now I don't remember any details.

02-28-2022, 18:42	#4 (permalink)
n4spd Junior Member Join Date: Feb 2021 Location: Constanta Posts: 19 Member: 2982260 Status: Offline Thanks Meter: 0	Right now I use HEX editor but i cannot figure out the encoding used for binary file. C166 i am not sure is using checksum. I was trying to use a binary to inage converter but cannot find anywhre on the web.. there is one website who provide a tool to convert binary to image but no image show up... At some point somebody sugested to use Siemens Smelter because of compatibility with the C166 but still no luck.. I even tried Siemens Image Viewer for C35 series (uses C166 processor) but cannot recognize the bin. If you remember the tool please write back. I plan to make a ibternational website with 1000+ reto tools for modify the old phones free of charge.. thousand of logos, java games and mods. Big thanks for any help.