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LncAhG · 09-26-2025, 01:41 PM

The function which checks vid and pid and so on does more than simply compre them.
For a match, it apparently also calls some kind of initialisation code, depending on the device found.
And this does more checks that can lead to a failure which in turn emits the 1802 message.

The whitelist contains (among others):

Code:

00001f60   02 00 00 00     uint32_t  2h                      category
00001f64   99 11 79 90     uint32_t  9079 1199h              vendev_id
00001f68   99 11 78 90     uint32_t  9078 1199h              subsys_id
00001f6c   00 00

...

LncAhG · 09-25-2025, 11:50 AM

Thanks, but thats exactly the file I analysed in ghidra. I even found now the function which references
the 1802 message (after enforcing a disassembly on that region). It leads to a result comparable to
your pic.
However, this function is called 4 times, but only from another function which also never is being called.
I must admit that I've never been an x86 assembler guy (ask me 68k or MSP stuff and we're fine ;-)).
I might be able to patch the return codes or remove the "while true" loop in the end and do try-and-error...
The problem is, I have...

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