Commodore 64/128 BlinkingDiag 4-in-1 Diagnostic Module by Tebl The BlinkenDiag module has been designed to test and diagnose problems with your Commodore 64 & 128, showing the status of the address and data bits with 24 LEDs and the supply voltage on an integrated mini 3-digit LED voltmeter. Supplied Pre-loaded with 4 diagnostic cartridges - Co mmodore 586220 Diagno stic Cartridge Commodore 781220 Dead Test Cartridge Commodore ST10 Dead Test Cartridge with extended SID test World of Jani Commodore 1541 Diagnostic & Test The BlinkingDiag uses a 28c256, which can be easily erased and programmed with your choice of software (4 slots of 8K) with a suitable programmer (not included), this means you can use it for games, utilities, sound and lots more. The BlinkingDiag uses three press/locking switches, a reset button and 4 jumpers to configure software and LED modes. This is based on a project by Tebl - https://github.com/tebl/C64-BlinkenDiag. If you have any questions just as...