6. Design of micro-instruction format and design of micro-program control unit
Micro instruction format design
mind Mapping
solved problem
Classification of microinstruction format
Encoding of microinstructions
1. Direct encoding method: 1bit outputs a control signal.
2. Field direct encoding method: group mutually exclusive micro-operations into one group and compatible micro-operations into one group; then different commands are generated after decoding.
3. Field indirect encoding: some micro-commands in one field need to be interpreted by some micro-commands in another field. Since the micro-commands are not directly decoded by the field, it is called field indirect encoding, also known as implicit encoding. .
Microinstruction address formation method
Design of Microprogram Control Unit
mind Mapping
Design steps of microprogram control unit
Step 1: For
detailed steps, see the central processing unit of the design group: 4. Principle and design of hard-wired controller
Classification of microprogramming
Comparison of hard wiring and microprogram
