Ken Shirriff's blog

The Tenma 72-7740 digital multimeter is a multimeter in the $70 price range. Overall, it's a nice, solidly-build meter and it has perfo...

Today's Forbes billionaires list inspired me to visualize the wealth inequality in the United States. Use the Forbes list and other sou...

On the surface, a microprocessor's registers seem like simple storage, but not in the 8085 microprocessor. Reverse-engineering the 8085...

The instruction set of the 8085 microprocessor has an underlying structure that becomes much clearer if expressed in an octal-based table,...

The 8085 microprocessor has two undocumented status flags: V and K. These flags can be reverse-engineered by looking at the silicon of the ...