…and a yellow longboard have been added to my collection of Commodore 64 motherboards. The yellow Assy 250425 Revision B longboard is in really great shape. It has a MOS 8500 MPU which is quite unusual for the long boards. Normally they have MOS 6510 … Read more
During the last couple of weeks I’ve received 8 (!) broken Commodore 64 machines that were in need of repair. The repair logs of three of them have already been described here (link), while the latter five had issues ranging from faulty Serial Ports (link, link, link), … Read more
I have fixed quite a few broken Commodore 64’s, but this one was by far the most challeging one! The machine started out as a simple memory fault that was fixed so it could run the cartridge game of Jupiter Lander. However, it took a … Read more
I just got this stack of broken and badly discolored Commodore 64C’s from a friend. The cases were made in China, Hong Kong and Germany… The first board is an Assy 250469 Rev. A board that had a broken keyboard – some of the keys … Read more
Montezuma’s Revenge is by far my all time favourite game for the Commodore 64 (link). Maybe it’s because the gameplay is so simple. All you have to do is find keys, open doors, don’t get killed, get to the bottom of the maze, repeat… In … Read more
My all time favourite game for the Commodore 64 is Montezuma’s Revenge by Parker Brothers! I own the game on diskette but never managed to get a copy of it on tape. After years of searching for it online, I finally found a copy on Ebay! How … Read more
Some people find it tedious to fiddle around with the good old Commodore 64 hardware but would still like to play some of the old games. They don’t mind playing the games in an emulator, as long as the joystick is one of the originals, … Read more
The most common cause of a black screen on the old Commodore 64 long boards (link) is a broken Programmed Logic Array (PLA) chip located at position U17. Based on different input signals, the PLA creates chip select signals and controls which chip is to … Read more