8085 program to find smallest number between two numbers

Problem – Write an assembly language program to find smallest number between two number’s. 

Example –

Algorithm –

1. Load the content from memory location 
   
2. Move content of Accumulator into Register B 
   
3. Load the content from Memory location
   
4. Compare the content of Register B 
   
5. If carry flag is equal to 1 go to step 7 
   
6. Move content of Register B into Accumulator
   
7. Store the content into Memory
   
8. End of program 
   

Program –

Memory	Mnemonics	Use Operand	Comments
2000	LDA	[2500]	[A]<-[2500]
2003	MOV B, A		[B]<-[A]
2004	LDA	2501	[A]<-[2501]
2007	CMP B		[A]<-[A]-[B]
2008	JC *	[200C]	jump carry
200B	MOV A, B		[A]<-[B]
200C	STA	[2502]	[A]->[2502]
200F	HLT		STOP

Explanation –

1. LDA is used to load accumulator (3 Byte instruction). 
   
2. CMP is used to compare the content of accumulator (1 Byte instruction). 
   
3. STA is used to store accumulator direct using 16-bit address (3 Byte instruction). 
   
4. JC jump if carry (3 Byte instruction). 

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