# 8085 program to find maximum and minimum of 10 numbers

Problem – Write an assembly language program in 8085 microprocessor to find maximum and minimum of 10 numbers.

Example –

`Minimum: 01H,  Maximum: FFH`

In CMP instruction:
If Accumulator > Register then carry and zero flags are reset
If Accumulator = Register then zero flag is set
If Accumulator < Register then carry flag is set

Assumption – List of numbers from 2050H to 2059H and output at 2060H and 2061H.

Algorithm –

1. Maximum number is stored in B register and minimum in C register
2. Load counter in D register
3. Load starting element in Accumulator, B and C register
4. Compare Accumulator and B register
5. If carry flag is not set then transfer contents of Accumulator to B. Else, compare Accumulator with C register, if carry flag is set transfer contents of Accumulator to C
6. Decrement D register
7. If D>0 take next element in Accumulator and go to point 4
8. If D=0, store B and C register in memory
9. End of program

Program-

2003H MOV B, M Store maximum
2004H MOV C, M Store minimum
2005H MVI D, 0AH Counter for 10 elements
2007H LOOP MOV A, M Retrieve list element in Accumulator
2008H CMP B Compare element with maximum number
200CH MOV B, A Transfer contents of A to B as A > B
200DH MIN CMP C Compare element with minimum number
2011H MOV C, A Transfer contents of A to C if A < minimum
2012H SKIP INX H Increment memory
2013H DCR D Decrement counter
201AH MOV M, B Move maximum to 2060H
201BH INX H Increment memory
201CH MOV M, C Move minimum to 2061H
201DH HLT Halt

Explanation –

1. One by one all elements are compared with B and C register.
2. Element is compared with maximum, if it greater than maximum then it is stored in B register. Else, it is compared with minimum and if it is less than minimum then it stored in C regiter.
3. Loop executes 10 number of times.
4. At the end of 10 iterations, maximum and minimum are stored at 2060H and 2061H respectively.

My Personal Notes arrow_drop_up

Student at Netaji Subhas Institute of Technology

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