Doesn't work on pSX (the Windows emulator) nor my real hardware fat PAL PS2 :^( I can help you with debugging the latter if you care about supporting PS2
Viewing post in Yume Nikki PS1 (demo) comments
ePSXe (if you mean this one) is old and outdated (I found the pSX one and it’s also quite old).
I only support DuckStation.
As for the PS2 - it’s confirmed to work on it, but only when running with CD. POPSTARTER/OPL will not work because they use a different way of PS1 emulation on PS2 and I don’t have strength to try to support this, sorry…