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12 bit BCD adder with correction, using FAC and RCA.

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12 bit BCD adder

Simple 12 bit BCD adder using 4 modules. Full adder cell does addition using bit logic. Ripple carry adder references the FAC module 4 times, doing a 4 bit addition, a BCD digit in other words. BCD2 applies correction by calling the RCA function two times and using a corrfactor in-between. BCD Adder calls BCD2 4 times, 3 times for the first 3 digits, and one more time in case the 12th bit is 1.

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12 bit BCD adder with correction, using FAC and RCA.

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