A presentation on the topic of BCD arithmetic and 16-bit data operations of the subject Microprocessor and interfacing MI/MPI, useful especially for GTU students.

1. BCD ARITHMETIC AND 16-BIT DATA
OPERATIONS
DHANANJAYSINH JHALA
170410107027
TY CE-1, BATCH B
MICROPROCESSOR AND INTERFACING ALA

2. BCD ADDITION
The addition of two BCD numbers in 8085 may not represent an
appropriate BCD value.
This is because the microprocessor cannot recognize BCD
numbers.
In BCD addition, any number larger than 9 is invalid and we need
to adjust that by adding 6 in binary.
 A special instruction called decimal adjust accumulator(DAA)
performs the function of adjusting a BCD sum.

4. PACKED AND UNPACKED BCD

5. ADDITION OF UNSIGNED BCD NUMBERS
Problem statement: A set of 10 packed BCD numbers is stored in
the memory location starting at XX50H.

9. SUBTRACTION OF PACKED BCD NUMBERS

10. 16-BIT DATA OPERATIONS