C64 Dead Test Cartridge Based upon the 781220 ROM Compatible with C64 C64c SX64 & C128 (64 mode only) ** Simply plug it in, wait 60 seconds and check your results ** ** Dead Test User Guide included ** Dead Test cart tests ROM and RAM. It does NOT test I/O ** Coming soon, full TFW8b diagnostic with full Harness for testing all ports and I/O as well as a few ‘special TFW8b exclusive test features’ ;D Ships in grey case.