[fl7305]

I think it would be well enough for Nethack.

Would be interesting if even a Z80 could run Nethack in a CPU emulator.

[anthk]

Nethack 1.3c, maybe. The first release, I mean, the inmediate one after Hack 1.0.3 under BSD's. That with a lot of patience. Nethack 3.4.3... I doub't it even DOS could handle it with 640k and a 286.