Dead Test Cartridge

Diagnostic Cartridge by C64Lover - DEAD TEST V2 - first port of call when C64 shows "black screen".

Cartridge has modifications in comparison to the original project. This is the second, improved version:

• The first thing that happens is the colour of the frame is changed to light grey, so you do not need to wait about 10-15 seconds to find out if the computer starts up at all (meaning that the clock, reset, CPU, PLA is working and the cartridge code is run in the Ultimax) - it was already present in the first version from C64Lover.
• All the operations performed are changing the colour of the frame, which is visible as short bars, their absence means the processor freezes.
• Before the RAM test, the graphics mode is set (at the beginning of RAM address space), it allows to visualize problems with RAM or multiplexing and VIC.
• The memory chips in the diagram are labelled with the data bus bit number instead of the 4164 (Uxx) chip designation, which was compatible only with the old motherboards (the later two revisions have two 4464 chips instead of the 8x 4164 and both have different Uxx designations).
• Readable font (partial substitution, keeping original frames)

Full manual (not including above changes) is available here.