Feb 26, 2023 · The CIC-NUS (usually called "CIC") is a protection chip that is present on all N64 cartridges and implements the required security measures to allow the game to boot on an unmodified console.

Apr 13, 2020 · The CIC in an N64 cartridge is simply a means of preventing unlicensed games from working on stock N64 systems. In a sense, the CIC is of no concern to the gamer. The N64 system however, requires the CIC in order to start up a game.

The N64 console contains a special PIF chip that communicates with this CIC security chip. Once the PIF chip confirms all is Ok with the cartridge region code, only then will it allow the N64 to boot the game.

This code allows you to create a replacement CIC chip for N64 games that you own on an ATTiny25, ATTiny45 of ATTiny85. The original code was written by jesgdev and updated with multi-region support by saturnu.

This code allows you to create a replacement CIC chip for N64 games that you own on an ATTiny25 Or ATTiny45. The original code was written by jesgdev and updated with multi-region support by saturnu. I simply modified it slightly for my purposes (no multi-region support, ATTiny45 instead of 25) and uploaded the code for posterity.

The CIC is the “lockout” chip in NES/SNES/N64 cartridges, used to get an iron grip on the market prevent people from copying games. It was manufactured by Sharp and is likely one of their old “one-chip microcomputers”, used in calculators and TV remotes and the like.

The Boot Codes can be named after the CIC (Lockout) chip that they were created to work with and have the format CIC-NUS-####, to detect which boot code has which name we can take the MD5 hash of the code and compare it to the table below 1.

The CIC version used by the ROM must match the (Ultra)CIC version used in the reproduction cartridge, otherwise the game won't boot. As far as NTSC ROM's are concerned: some games might flicker on a PAL TV.

The Checking Integrated Circuit, or CIC, in Nintendo 64 game cartridges prevented unlicensed and pirated game cartridges from running and allowed for regional lockout. During game execution, the PIF continuously communicates with the CIC to verify the game is valid.

A curated list of Nintendo 64 development resources including toolchains, documentation, emulators, example code, and more! Installing the Nintendo 64 Development Kit - How to install the Nintendo 64 Software Development Kit under Windows 2000 and 98SE and build sample code. Also generally works under Windows XP.