Design, code/draw, and test using the Altera DE0-CV board a2-digit BCD adder/subtractor. The two BCD digits of the first BCDnumber (A) are input using SW3 down to SW0 for the leastsignificant BCD digit, and SW7 down to SW4 for the most significantBCD digit and latched when KEY1 is pressed. The two BCD digits ofthe second BCD number (B) are input using SW3 down to SW0 for theleast significant BCD digit and SW7 to SW4 for the most significantBCD digit and latched when KEY0 is pressed. Use SW9 to selectbetween BCD addition (A plus B) and BCD subtraction (A minus B).Display
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