Control: implementation
Moore machine
Input:
6 opcode bits
Op0-Op5
4 state bits (10 states)
S0-S3
Output:
13 control signals
3 are multiple-bit
4 next-state bits
NS0-NS3
Current state stored in state register
Control logic: combinational circuit
controls depend only on state
next-state depends on
current state
opcode
Fig. C.7