Flow of a typical Instruction Word - 8085
Explain the flow of a typical Instruction Word.
The flow of a typical Instruction word is as follows:
- The content of the program counter of 2 byte is transferred to the address register known as MAR ( memory address register ). This occurs at the starting of a fetch cycle.
- The contents are transferred via the address bus.
- Once this is done the timing and control section of the processor reads the contents of the referenced memory address location.
- After this the data is sent to the memory data register with the help of the data bus.
- Now the data is placed in the instruction register which will eventually decode and execute it.