N.E.S. is a Nintendo Entertainment System emulator, featuring a CPU emulated through an interpreter and a PPU (graphics) emulated entirely in software.

While it offers good compatibility, its scope is limited as it does not support mappers, which are commonly found in NES cartridges.

IronGB is a custom Game Boy emulator that emulates the 8-bit CPU using an interpreter and handles the PPU (graphics) entirely through software.

IronGB includes a debugger, enabling users to step through each instruction for detailed analysis and troubleshooting.