Chesscomputer emulation is in MAME: https://www.mamedev.org/

But I think you want the one by fhub? It has the roms included, and Arena UI, check "Download from my private cloud folder CB-Emu"
Hier: https://fhub.jimdofree.com/

Und "und weiß immer noch nicht genau um was es genau geht" <-- just try it and see ;D