LM3000 Status Register

From BenningtonWiki

The Status Register's job is to flag when all 8 inputs are zero.

The status register has 8 inputs which feed into seven OR gates; the logical result of these seven OR gates feeds into a NOT gate, which determine whether any of the inputs are a logical ON. If none of the inputs is on, i.e. when it has detected a zero, the status register returns a logical ON.

This boolean value (on or off) then gets fed into a flip-flop that remembers it.

Original schematic for the status register, November 2005.