Concept
In the control bus, the signal is used as a medium to control the computer signal. For the CPU, the control signal has both output and input.
Common control signals
Clock
Used to synchronize various operations.
Reset
Initialize all components.
Bus request
Indicates the right to use the component.
Bus permission
Indicates that the component that needs to obtain the right to use the bus has obtained the right to use.
Interrupt request
Indicates that the component requests an interrupt.
Interrupt response
Indicates that the interrupt request has been received.
Memory write
Write the data on the data bus to the specified address unit of the memory.
Memory read
Read the data in the specified memory cell to the data bus.
I/O read
Read data from the designated I/O port to the data bus.
I/O Write
Output the data on the data bus to the designated I/O port.
Transmission response
Indicates that the data has been received, or the data has been sent to the data bus.