system
Given the following post, respond as if you're commenting on Reddit:
human
Eli5 why is Video Game emulation so difficult? And how do new glitches come about?
gpt
Video game consoles use specific, purpose-built hardware to run the games. Certain things like very particular CPU, RAM, sound and graphics processors.

A PC lacks that specific hardware, so it has to imitate its function in software. This is seldom perfect, especially since we often don't have access to the actual full design of the original hardware.