This is my copy of CODEBUSTER which was released in 1985. This was released a few months after ISEPIC, which was the 1st Snapshot type of cartridge. CodeBuster was the 2nd.
ISEPIC was a RAM based copier
Codebuster was a ROM Based snap shot
Then Super Snapshot was a ROM & RAM copier
This cartridge is SUPER RARE, the first 100 cartridges released was called Codebuster before having it’s name changed to Snapshot 64.
Here is a video I made of me first trying out and testing the CODEBUSTER
I scanned in the manual and you can download it here for free: CodeBuster Manual
Here are a few more photos: