Question

Write an Assembly Language Program to find the largest number in a block of memory locations begins from 2400H, block length is stored at 23 FFH. Store the largest number after the end of the block.

Answer 1

Label            Instruction                                            Comments

START:  LXI H, 23FFH     ; Address for count in HL pair
        MOV C, M         ; Get count in register C
        SUB A            ; Clear accumulator

LOOP:   INX H            ; Go to next memory location
        CMP M            ; Compare memory with accumulator
        JNC AHEAD        ; If A ≥ M, jump to AHEAD
        MOV A, M         ; Get larger number in accumulator

AHEAD:  DCR C            ; Decrement count
        JNZ LOOP         ; Repeat loop if count not zero
        INX H            ; Increment memory location
        MOV M, A         ; Store result in memory

END:    HLT              ; Stop execution