stay Control bus The control of computer signals is implemented by using this signal as the medium. For CPU, control signal has both output and input. Common control signals
Announce Used to synchronize various operations.
Initialize all parts.
Indicates the right of use that the component needs to obtain.
Indicates that the parts that need to obtain the bus use right have obtained the use right.
Indicates that the component has made an interrupt request.
Indicates that the interrupt request has been received.
take data bus The data on the is written to the designated address unit of the memory. Will specify Storage unit Data read from data bus On. Read data from the specified I/O port to the data bus.
Connect the data output To the specified I/O port. Indicates that the data has been received or sent to data bus On. 
