I would guess a modern BIOS chip is as powerful as an NES, right?
You can do substantially more in UEFI than NES-level games. (See https://uefi.org/specs/UEFI/2.9_A/12_Protocols_Console_Suppo...)
What do you mean by "BIOS chip"? Like, the flash memory that stores the motherboard's firmware? I don't think that contains any processing elements.
You can do substantially more in UEFI than NES-level games. (See https://uefi.org/specs/UEFI/2.9_A/12_Protocols_Console_Suppo...)