FWIW, I also noticed that there's always a psxBios_FlushCache call soon after.

This is the relevant code in the PCSXR emulator, but I'm not really sure what it represents or where most the table is initialized: see lines 2240 and 2672 in https://github.com/iCatButler/pcsxr/blob/62467b86871aee3d70c7445f3cb79f0858ec566e/libpcsxcore/psxbios.c. Lines 2710 and 2713 are also suspici...