What is IMFIDX10\XXXX.S3? And modifying EEPROM

[petabyt]

Continuation of #3.

• It's a motorola S3 file: https://en.wikipedia.org/wiki/SREC_(file_format)
• String is beside FPUPDATE.DAT, suggesting it's triggered in a similar way to firmware updates
• It can be used to activate the AUTO_ACT.SCR flag, and enable scripting

TODO: Understand how S3 files work.
https://github.com/fujihack/fujihack/blob/master/etc/s3/s3.c

[petabyt]

Tried manually calling function and it crashed

[petabyt]

Code may be task specific, seems like it may be related to usbcont task, so maybe a key combination while USB is plugged in