This is part of the "microprogramming notes" web pages, which contain the following subtopics:
  1. Simple one-bus CPU architecture
  2. Register in / out connections
  3. Microcode examples
  4. ALU architecture (insides)
  5. ALU interface (outsides)    <-- you are here
  6. Control circuitry
  7. Simple two-bus CPU architecture
  8. Simple three-bus CPU architecture (used in RISCs)

ALU interface

Note: To simplify the diagram above, I've cheated a bit and rearranged the Ai and Bi input positions. If you didn't notice, then it's fine.

This is part of the "microprogramming notes" web pages, which contain the following subtopics:

  1. Simple one-bus CPU architecture
  2. Register in / out connections
  3. Microcode examples
  4. ALU architecture (insides)
  5. ALU interface (outsides)    <-- you are here
  6. Control circuitry
  7. Simple two-bus CPU architecture
  8. Simple three-bus CPU architecture (used in RISCs)

[list of course notes topics available] [main course page]