Originally Posted by UberFreak
Same thing with Intel CPUs that came after the 8088 (used in the first XT). They could all run 8088 code but included many new commands (I'm referring to 286/386/486 etc).
That's called being back-compatible, has nothing to do with emulation.
It is being backwards compatible by emulating the old hardware. It has everything to do with emulation. It may not be a software emulator, but it doesn't have the original design inside -> it is an emulation.