hp 8648B firmware

[hackwell]

Hi everyone

I'm in search of the firmware for my HP 8648B which throws a ROM checksum error.

Does a life saver here have it ? Sure enough it's nowhere to be found on the internet or I goofed it ?

There are 4 27C010 OTP ROMs on the firmware board.

[hackwell]

This firmware seems to be impossible to come by...
Weird enough the generator works fine so far. I read the ROMs and disassembled it with Ghidra which is a pain in the neck for 68K code. Unfortunately I can't find anything wrong so far.
I'm still working on this and can provide the contents of my ROMs in case you're interested. The firmware is corrupted but it could be the only one around for now.