Last year, Paul Robson sent me this document, describing how he thought the SCELBI Oscilloscope Interface worked.

SCELBI Oscilloscope Interface Description

Paul’s reverse engineering efforts turned out to be right on the money. Having this document has helped me substantially with software design and bring up of real hardware.

There are some aspects to the design that I will elaborate on in future posts. Some parts of Paul’s document will not be obvious to some novices, even though they are described well enough in Paul’s document for many people to understand. Also, I’ve discovered some practical limitations to the implementation, as I go through physical hardware bring up that need further elaboration.