Emulation, in this case, is the process of playing Nintendo, Super Nintendo and other DQ games on your computer (Mac or Windows, and even on your Wii or Nintendo DS). The emulator is the software that acts like the NES, SNES or even Playstation that you install on your computer or console and ROMS are the games themselves that have been copied (generally in *.NES, SMC or GBA formats)

I recommend you check out Zophars Domain for emulators. I recommend you use Nesticle for NES, ZSNES for SNES and Visual Boy Advance for GB/GBA. You will find that ROMS are harder to come by. Before you download the DQ ROMS housed here in the DQ Castle, let's make sure we all understand one thing - creating and downloading ROMS violate copyright laws and Nintendo's end-user license agreement. In short - Emulators (if they were reversed engineered from copy written BIOS, which they generally are) and ROMS (stolen games given away for free) are illegal.