8085 program to find larger of two 8 bit numbers

In this program we will see how to find the larger of two numbers.

Problem Statement

Write 8085 Assembly language program to find the larger number of two 8-bit number store dat location 8000H and 8001H.

Discussion

This checking is done by using the CMP instruction. This instruction is very similar to the SUB instruction. The only difference is that it does not update the value of Accumulator after executing. So after comparing, if the CY flag is set, it means that the first number is smaller, and the second one is larger

Input

First input

Address	Data
. . .	. . .
8000	FD
8001	23
. . .	. . .

second input

Address	Data
. . .	. . .
8000	59
8001	75
. . .	. . .

Flow Diagram

Program

Address	HEX Codes	Label	Mnemonics	Comments
F000	21, 00, 80		LXI H,8000H	Point to the first number
F003	46		MOV B,M	Load the first number to B
F004	23		INX H	Point to next location
F005	7E		MOV A,M	Get the second number to A
F006	B8		CMP B	Compare B with A
F007	D2, 0B, F0		JNC STORE	Is CY = 0,jump to Store
F00A	78		MOV A,B	Load A with second number
F00B	32, 50, 80	STORE	STA 8050H	Store the number into memory
F00E	76		HLT	Terminate the program

Output

First output

Address	Data
. . .	. . .
8050	FD
. . .	. . .

Second output

Address	Data
. . .	. . .
8050	75
. . .	. . .

Vrundesha Joshi

Published on 22-Jan-2019 10:43:08

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