Any time you're working with older electronics, there's a risk that some of the components may have failed as a result of age. This ...

Since the Soroban Computeriter is entirely electro-mechanical, I expected everything to operate glacially slowly. Examination of the documen...

As described here , the System Source Computer Museum asked me to build an electronic replacement for the non-repairable Soroban Computeri...

This drawing from the Soroban Computeriter Coder Unit Technical Manual shows the underside of the Computeriter. The electrical interface t...

In the early 1960s a company called Soroban Engineering produced a product they called a Computeriter. This was an IBM electric typewriter, ...

Last summer I came across my somewhat tattered copy of the PDP-11 Processor Handbook. This dates to my first job as a software engineer in t...

I decided today was a good day to populate the Arithmetic Logic Unit board I had fabricated in March. I taped the bare board to my solder st...