ok for starters, you must use a ps1 multi-tap for ps1 games, and the ps2 multi-tap for the ps2 games, in other words you can\'t mix match, so in other words no, you cant use a ps2 multi tap for ps1 games, it has something to do witht he controller config. in the multi-taps
so you have to have each multi-tap, one for the ps2 games, and oone for the ps1 games, buy one of each.