other console port to psx

[PEE-S*X]

I downloaded cd called 101 sega games for psx and nes games on psx or something like that. They play on psx. Inside those cd's they has a emlator that run sega game. If sega and nes emulators can played on psx is there any emulator or any other way to play games like GBA, NEOGEO in psx.
thnx