Design a 7-bit combinational circuit incrementer for the microprogram sequencer of Fig. 7-8 (see Fig. 4-8). Modify

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Design a 7-bit combinational circuit incrementer for the microprogram sequencer of Fig. 7-8 (see Fig. 4-8). Modify the incrementer by including a control input D. When D= 0, the circuit increments by one, but when D 1, the circuit increments by two.

Fig. 7-8

27 452 Input logic MUX2 Select External (MAP) Test Clock- Microops 3210 S MUX 1 So CAR Control memory BR

Fig. 4-8

A y   HA HA  S C S Sz S A3 HA   S C S3 Ao HA y C S So

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