Fravia's TOOLS OF OUR TRADE Messageboard ~ Moderated
Re: IDA script to crack flash-bios file
Saturday, 26-Dec-98 16:20:00
There are two decompilers that I know of that "supposedly" can handle reversing BIOS image files.
The first is an add-on to the familiar Sourcer disassembler. As far as I can tell, it works as a pre processor for the image so that sourcer correctly disassembles the resulting file. -I haven't used it, so I'm not certain.
Info can be found at:
http://www.v-com.com/products/products_developer.html
The second BIOS disassembelr I've found, is XDASM and info for it can be found at:
http://www.datasynceng.com/xdasmdoc.htm
I've spent the last 48+ hours looking for working copies of these programs on the net... The Sourcer program is easy to find but I can't find the "BIOS Pre-Processor" add on.
In my situation, IDA-Pro doesn't support the processor I need (80C188). Yes, I know the instruction sets are nearly dentical to the 8086 but the 80186/80188 have additional instructions that are probably being used.
If you figure out how to get IDA to kick out a reasonable disassembly or happen to find a copy of either of the programs mentioned above, please let me know.
-T
Talsman