Question: can psx play ps2 games?
Answer: Simple answer: is that they are 2 completely different systems with different hardware. So no you can not play psx (ps1) games on a ps2 emulator or ps2 games on a psx emulator. Longer answer: Emulating PS2 games on a PSX emulator makes 0 sense since the PSX could never run a PS2 game with it's hardware.