Algorithm –

Load data from offset 500 to REGISTER AL (first number)

Load data from offset 501 to register BL (second number)

Add these two numbers (contents of register AL and register BL)

Apply DAA instruction (decimal adjust)

Store the result (content of register AL) to offset 600

Set register AL to 00

Add contents of register AL to itself with carry

Store the result (content of register AL) to offset 601

Stop

Program –

MEMORY ADDRESS MNEMONICS COMMENT

400 MOV AL, [500] AL<-[500]

404 MOV BL, [501] BL<-[501]

408 ADD AL, BL AL<-AL+BL

40A DAA DECIMAL ADJUST AL

40B MOV [600], AL AL->[600]

40F MOV AL, 00 AL<-00

411 ADC AL, AL AL<-AL+AL+cy(prev)

413 MOV [601], AL AL->[601]

417 HLT END

Explanation –

MOV AL, [500]: load data from offset 500 to register AL

MOV BL, [501]: load data from offset 501 to register BL

ADD AL, BL: ADD contents of REGISTERS AL AND BL

DAA: decimal adjust AL

MOV [600], AL: store data from register AL to offset 600

MOV AL, 00: set value of register AL to 00

ADC AL, AL: add contents of register AL to AL with carry

MOV [601], AL: store data from register AL to offset 601