Name the Modchip

[shitfoot]

Hello all, I recently had a PS given to me and about 50 games that work and another 25 or so games that boot up but the screen rolls. If i use them in EPSXE they play fine.

So my next question would be could I rerip the games, then patch then, burn again?

My PS is Model# scph 5501
mod chip has 8 pins 4 of which are being used ( I believe 1 one side 3 the other)
the # on the chip is
12T508/P
04HAP
5428 <---- Not sure about 1st 2 digits

If anyone knows what chip this is and if it is possible for me to fix these 25 rolling screen games it would be much appreciated.