Board completed! Time to do some tests and see if I got it right and how many of the MM5280 are fake. I opted to install bridges instead of the 5V and 12v regulators and provide regulated power t...

Populating the real thing. Still awaiting for the obsolete parts (74LS13, 74LS55 and the memories) and also need to get some old school ceramic discs of reasonable size to mantain the vintage look....

The boards have already been sent to fabrication and I’m starting to source the components. There are a few obsolete components that are either difficult to find and/or expensive to get, so I’m usi...

This board follows the MTU standard for the KIM-1 expansion bus and enables to connect up to five cards, like the K-1008. Additionally, all signals of the KIM-1 are replicated on an edge connector ...

Finished the top layer too. I need to make some minor adjustments to the solder mask (not shown) and double check a couple of corrections I’ve made to the schematic, but this is it. I’ve had to ad...

I’ve realised that I’ve completely messed up the schematic. The RAM chips are connected together in the most efficient way for the layout, not according to their intended pinout. For example, A1 i...

I’m working on what aims to be a faithful replica of MTU’s K-1008 Visable Memory card for the KIM-1. I’m following basically the same procedure as I did for my KIM-1 Rev. D replica: reproducing the...

I have the first brand new KIM-1 Rev. D in over 40 years!

I’ve just finished my take on the keypad. The design premises were: It should be a direct replacement for a rev. D (or later) keypad so it could be used in a real KIM with a missing or broken o...

While (if ever) I complete the FPGA replacement for the 6530, I’ve designed this daughterboard to replace both 6530 in a KIM-1 PCB. It should work also with a real KIM-1. It has the same “hand-dra...