Convert PSX Games To PSP Format with PSX2PSP - pspunk
Still one of the best ways to play PS1 games on the go these days :D : r/PSP
ALL PlayStation 1 (PSX) Games Now Available on PSP Through Remote Play
Running PSP and PS1 games on your PS Vita using ADRENALINE - Sthetix
How to play a PSX game on PSP - Quora
Are the PS1 games on PSP emulation or is there some sort of hardware backwards compatibility ? I wanted to put all my PS1 games on it but idk if there can