So is that emulation software-base, not hardware-base, or half half? If its half half, consider several games won't work, what's the big difference with real PS1 hardwares in terms of gaming experience？
Originally half-half, then later fully software. I don't know all problematic games but the ones I do know of had some hard coded expectations for the hardware that the emulator didn't fulfill.
Even going from original PS2 to slim PS2 some games (eg. Panelist) stopped working because the specs of the DVD drive changed.
And similarly going from original PS1 to PSone resulted in minor changes in GPU behaviour which caused display quirks in some games.
Even going from original PS2 to slim PS2 some games (eg. Panelist) stopped working because the specs of the DVD drive changed.
And similarly going from original PS1 to PSone resulted in minor changes in GPU behaviour which caused display quirks in some games.