Hi have you tried any emulator on your Amigas? i have tried Sega master system games, and commodore 64 games and Nintendo and game boy and Atari 2600 and 7800 games. they work quite well on a Amiga 4000/030 but the commodore 64 music is way of, that is not something it can emulate very good, other than that it works quite well. I am surprised that it can be done on a 030 CPU
CoolNESS (NES) should work pretty nicely. Download latest version here:
http://hem.passagen.se/flubba/coolness.htmAmiBoy (GameBoy) by 007 should work fast and nicely, if you like MSX you'll find AmiMSX to be one of the best MSX emulators for any platform: Official Juan Antonio '007' Gomez Galvez Emulators web page:
http://kung-foo.net/zener/AmiEmulatorsWeb/Magic64 will probably be the fastest for your machine.