Microsoft Application Compatibility Toolkit: ProcessorCountLie shim parameter?

Who knows how the parameter for the shim ProcessorCountLie works in Microsoft Application Compatibility Toolkit (Compatibility Administrator)?

I’d like to make some old games incompatibile with 8+ cores work again on Windows 10. I tried MS ACT and set ProcessorCountLie, and set as parameter 2,3,4 for testing but got strange results based on real core usage monitor. I thought it could be a hexadecimal value (tried bot 0x02 and 2…) representing a binary number (e.g. 0x3=3=0011) but still won’t explain the strange results of real cores usage.

Someone knows exactly how the parameter for ProcessorCountLie undocumented shim works, and how can I limit for example to the first 4 cores usage?

Here are my attempts on i7-8750h (6 cores, 12 threads) using as parameter "2", then "3", and "4":