HSTNS-30 Firmware dump

[autonomousperson]

Not sure where to post this but figured you could add it to the collection. I got a PD30 with 2 PIC's on there!

https://drive.google.com/drive/folders/1T5wr3l3zmn4VAYcKgGfeoV2zda_dKJYr?usp=sharing

Ive gone through PMBus spec 1.2 and tried all the command codes and they do not seem to be working. command 37 seems to set fan speed on this one instead of 40

[vankxr]

Uh, those are some dsPIC33, maybe IDA could generate some C pseudocode for that instead of goind thru the whole thing in assembly, have you tried it?

[math322]

You can also use Ghidra todo so. There are 2 Firmware Images in the Flash.

https://pastebin.com/1MmqBZtJ

[math322]

There are some special I2C commands that will trigger communication on the second I2C interface:

5E <3A/3B/3C/3D> ... CS

66 CS
68 CS