The Knowledge Adda

Assumption: Let assume that we have to write a program to find largest number among 10 data. Data are stored at different memory location and we have to store largest number at memory location also.

Algorithm:

Program:

Memory Address	Op-code	Operand	Comments
2000	LXI	H,2500 H	Number of data at 2500 H
2003	MOV	C,M	Number of data as Counter
2004	XRA	A	Clear the accumulator
2005	INX	H	Get First data
2006	CMP	M	Compare 2nd data with A
2007	JNC	200B	Check for no carry
200A	MOV	A,M	Store larger no. in Acc
200B	INX	H	Increment Pointer
200C	DCR	C	Decrement Counter
200D	JNZ	2007	Jump if counter is not 0
2010	STA	2550	Store largest number
2013	RST	5	Set Breakpoint
2014	END		End the program

Used Instruction:  

LXI: This instruction is used to store the 16-bit data in the register pair designated in the operand. 

MVI: This instruction is used to store 8 bit data in specified register. 

MOV: This instruction is used to copy the content from source register to destination register. 

INX: This instruction is used to increment the content of specified register pair by one. 

DCR: This instruction is used decrement the content of specified register by 1. 

XRA: This instruction is used to perform AND-ing operation with given data and accumulator. 

CMP M: Compare data in memory with accumulator 

JNC: Jump if not carry at specified memory address. 

JNZ: Jump if value of specified register is not zero. 

STA: This instruction is used to store the content of accumulator at given location. 

RST 5: This instruction is used to set break-point for the execution. 

END: This instruction is used to execute the program.

 

Result:  

Input: 

2500-0A (Number of Data) 

2501-01 

2502-02 

2503-03 

2504-10 

2505-12 

2506-25 

2507-35 

2508-45 

2509-21 

250A-07 

Output: 

2550-45 H (Largest Number)  

Procedure to look output