I have discovered a BIOS option which is called “Unlock PDT Message”, but the help tab doesn’t explain much about it. It looks like it’s some kind of data file related to Integrated Sensor Hub, which is managed by intel ME. My intel ME firmware doesn’t have ISHC partition, so it doesn’t have ISH firmware. However, investigating a little bit with Flash Image Tool (FIT) inside ISH section, I have found that the PDT binary file path is present and it points to a binary file inside “Decomp” folder when I’m editing my SPI ROM binary.
I don’t know what information stores PDT binary (maybe information about ISH ports integrated into motherboard? like what ports are shared and which of them are available to be used by ISH). Considering my PC lacks ISH firmware, PDT shouldn’t be necessary for my computer to boot, so I tried to build my SPI ROM image after removing PDT binary, but FIT throws an error when building. It is also imposible to empty PDT file and build the SPI ROM image. Nevertheless, after replacing everything inside PDT file with FF’s, it compiles and it doesn’t throw any error, but I don’t know if it will work once flashed.
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What does the “Unlock PDT Message” BIOS option does? By the option name, I could think of some kind of message which tells BIOS or intel ME to dump PDT information somewhere in memory
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I would like to know what kind of information is stored inside PDT binary file and how is it used. Is it used, somehow, by BIOS or intel ME (even though ISH firmware is not present)?
Specs:
-Motherboard: B360H4-EM (Medion)
-Processor: intel i7-9700K
-RAM: 8 GB of Samsung RAM (M378A1K43CB2-CRC)
-Storage: 1 TB SSD +1 TB HDD.
I have a 300-series chipset (B360, as the motherboard namer says) and these chipsets use CSME version 12.
My BIOS:
360H4W0X.zip (7.1 MB)