Question: Show that subregister A, in Fig. 10-21 is zero at the termination of (a) The decimal multiplication as specified in Fig. 10-22, and (b) The

Show that subregister A, in Fig. 10-21 is zero at the termination of 

(a) The decimal multiplication as specified in Fig. 10-22, and 

(b) The decimal division as specified in Fig. 10-23.

Fig. 10-21

B E A Be 103 102 101 10 Ae BCD arithmetic unit 103 102 10 10 . SC k = 4 10 10 10   Q Increment Decrement

Fig. 10-22

Multiply Multiplicand in B Multiplier in Q #0 A, +Q, B, A 0, B0 SC + k a QL = 0 dshr AQ SC SC-1 + SC #0 A+ A 

Fig. 10-23

#0 A B = 0 QL + QL +1 EA + A +B + 1 E

B E A Be 103 102 101 10 Ae BCD arithmetic unit 103 102 10 10 . SC k = 4 10 10 10 Q Increment Decrement

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Fig 1021 Architecture Summary A and Q are BCD registers A typically acts as the accumulator Q stores the multiplier or the quotient AC refers to the A... View full answer

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