Do you still use an actual PS1 to play PS1 games?

[sharkythesharkdogg]

Yeah sometimes a PS2 wont work with PS1 games.

Do you have the big brick? I figured the backwards compatibility problem was solved when the slim came out.

I know I've mentioned it in similar threads, but my copy of Xenogears would always lock up on one of the later boss fights. I think it was Dues? Anyway, it locked up on multiple variations of PS2s I tried.