PS2/PSOne compatibility issues

[Valiant]

Ok a few questions as I have only recently purchased a PS2 with the intention of playing a lot of old PSOne classics.

1) Does a PS2 8MB memory card work if formatted in a PSOne manner or do you have to use an old school PSOne grey/white memory card?

2) Is it possible to play US or Japanese PS One games on a UK machine in any shape or form if the PS2 is chipped?

3) Are there any known problems with any PSOne games playing on the PS2?

Thanks.

[sj33]

1) PS1 and PS2 cards are completely non-interchangable. You must use a PS1 card for PS1 software.

2) My PS2 is chipped, and I can play US and JPN games fine. Pretty much all modchips play imported PS1 software.

3) I believe a few obscure titles don't work, though I don't have a list as to which.

[Destrukticor]

some software has issues with a chipped machine

Ape Escape and dino crisis are 2 good examples
Have them both originals and they dont play but the YARR! version play absolutely fine

95% of the software plays ok though

[sj33]

Now that I think about it, I have a feeling some older modchips might have issues with games that detect the modchip. Any new modchip should have no issues, however.

[Valiant]

Thanks for the responses.