Not removed per say, they switched from using a Native IOP like the PS1’s processor to replicating the functionality with a PPC chip, codenamed Deckard. The emulation isn’t as good as original hardware, and PS2 games which used features of the IOP chip can have bugs as a result.
Many PS2 titles also used the PS1 hardware for game functionally so some PS2 titles have bugs on newer PS2 models with the hardware removed.
where can I learn more about these games?
where can I learn more about these games?
There are PS2 that had this function removed?
Not removed per say, they switched from using a Native IOP like the PS1’s processor to replicating the functionality with a PPC chip, codenamed Deckard. The emulation isn’t as good as original hardware, and PS2 games which used features of the IOP chip can have bugs as a result.
Functionality was never removed from PS2, they simply switched from a native PS1 IOP solution to replicating it in software via a PPC chip.
https://www.psdevwiki.com/ps2/IOP/Deckard
Sure but this did cause bugs in some games.