Consider the following 8085 program segment, where registers

Home » Computer Organization and Architecture » Computer organization and architecture miscellaneous » Question

Consider the following 8085 program segment, where registers B and C contain BCD values :

(a) For the two pairs (B = 44, C = 25) and (B = 33, C = 46) at S1,
(i) Find the values in register A when control reaches S2.
(ii) Find the values in registers D and E when control reaches S4.
(b) What, in general, is the value of D and E as a function of B and C when control reaches S4.

1. 0
2. 1
3. 2
4. None of these

Correct Option: D

(a) (i) 18 H     86H
(ii) D = 00H     D = FFH
E = 19H     E 13H
(b) E = | B – C |
D = 00H     if B > C
and D = FFH     if B < C