Also did not change anything, tried all available khz (5, 50, 100), same result only 0xFF (which I also get if I have nothing connected to the buspirate at all)
I redid one solder and then checked all connections again with the multimeter, all looks fine. (used 200 Ohm)
When I swap DI/DO I get random values, so I am pretty sure my standard connections is right.
Already tried to initiate/close the command with ]/[ instead of [/] as well, didn't change anything either.
I also checked if the EEPROM still works in its original use and it does, so I did not kill it yet
Any further things I could try? I am slowly running out of ideas...