Writing, Iguanas, and Electronics

NOR Instruction

This instruction performs a logical NOT OR of the left (Data Bus) and right (B-Register) values, and stores the result in the Output Cache Register. Each output bit will be true only when both input bits are false.

Logical NOR Instruction

Usage Examples:

        Hex                Mnemonic                      Action

11A0       ; NOR             A NOR B -> OCR
1170       ; NOR             Z NOR B -> OCR
1110       ; NOR            PC NOR B -> OCR

Updates when Executed:

  • ALU Output Cache Register
  • Zero Flag
  • Negative Flag