What does it mean when it says the PS3 80gig model emulates PS2 games?

Question

What does it mean when it says the PS3 80gig model emulates PS2 games?

Answer 1

20,40 gigabytes ps3 doesn't play ps2 games but the 60,80 plays ps2 games

Answer 2

A PS3 console requires a PS2 GPU and CPU to play PS2 games. The 20 and 60GB have both of these hardware-wise.

The 80GB has the GPU physically. But the CPU is emulated with software. So, some PS2 games will not play properly on the 80GB.

Answer 3

It means that there is no PS2's chip installed, but a special [program (emulator) creates a virtual PS2's CPU. 80GB supports ~70% of PS2 games. 20GB and NTSC 60GB play almost 100% of PS2 games because they have that chip installed physically.