Are you talking about the Japanese version of Final Fantasy VII or the western version ? I have the Japanese version at home, I can check quickly if needed.
Both versions use O to accept and X to cancel. In the european FFVIII hovewer it was switched around. I think only early and rushed ports of japanese titles used O to accept on the playstation.
It's still true today, for instance dark souls on the ps3 uses O to accept on the japanese version and X on the western.
I'm still not sure why Sony did that by the way. While I'm willing to believe that X strongly means "bad/false" in japanese, I don't feel like it really means "accept" in western cultures as far as I know. When the playstation came out I don't think I would have had a lot of trouble accepting O for accept and X for cancel.
It's still true today, for instance dark souls on the ps3 uses O to accept on the japanese version and X on the western.
I'm still not sure why Sony did that by the way. While I'm willing to believe that X strongly means "bad/false" in japanese, I don't feel like it really means "accept" in western cultures as far as I know. When the playstation came out I don't think I would have had a lot of trouble accepting O for accept and X for cancel.