This is something that came to my mind today, as today we have the source code for Super Mario 64 in hand recently people are porting to everything platform, PSP, 3DS, Vita, Wii U, Switch etc... (I still I expect a Dreamcast and PS2 version to be honest.)
But something came to mind, recently we saw Sonic 1 for the Super Nintendo and MegaMan X for the Sega Genesis, imagine if someone had Super Mario 64 for the PS1?
Is this technically possible?