8086 program to convert binary to Grey code

Prerequisite – Binary to/from Gray Code
Problem – Write a program to convert Binary number to Grey code 8-bit number where starting address is 2000 and the number is stored at 2500 memory address and store result into 2600 memory address.

Example –

Algorithm –

1. Move value at [2500] into AL
2. Move AL into BL
3. Logical shift right AL one time
4. XOR BL with AL (Logically) and store into BL
5. Move content of BL into 2600
6. Stop

Program –

Memory	Mnemonics	Operands	Comment
2000	MOV	AL, [2500]	[AL] <- [2500]
2004	MOV	BL, AL	[BL] <- [AL]
2006	SHR	AL, 01	Shift Right one time
2008	XOR	BL, AL	[BL] <- [BL] @ AL
200A	MOV	[2600], BL	[2600] <- [BL]
200E	HLT		Stop

Explanation – Registers AL, BL are used for general purpose

1. MOV is used to transfer the data
2. SHR is used to shift right (logically) up to counter is not zero
3. XOR is used to exclusive-or of two values (logically)
4. HLT is used to halt the program

See for 8085 program to convert binary numbers to gray

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