Read Operation on an Asynchronous Bus

• Again, the sequence of events the must happen to realise a read operation:
  1. CPU sends out address and READ signal
  2. CPU waits for data (from memory)
  3. Memory sends out wait if data is not ready
  4. Memory sends out data (after some time) and remove wait
  5. CPU reads data
     • assume CPU reads when bus clock goes from ONE to ZERO
  6. CPU removes address and READ signal
  7. Memory removes data