Problem – Write a program to add two 16-bit numbers where starting address is 2000 and the numbers are at 3000 and 3002 memory address and store result into 3004 and 3006 memory address.
- Load 0000H into CX register (for carry)
- Load the data into AX(accumulator) from memory 3000
- Load the data into BX register from memory 3002
- Add BX with Accumulator AX
- Jump if no carry
- Increment CX by 1
- Move data from AX(accumulator) to memory 3004
- Move data from CX register to memory 3006
|2000||MOV||CX, 0000||[CX] <- 0000|
|2003||MOV||AX, ||[AX] <- |
|2007||MOV||BX, ||[BX] <- |
|200B||ADD||AX, BX||[AX] <- [AX] + [BX]|
|200D||JNC||2010||Jump if no carry|
|200F||INC||CX||[CX] <- [CX] + 1|
|2010||MOV||, AX|| <- [AX]|
|2014||MOV||, CX|| <- [CX]|
- MOV is used to load and store data.
- ADD is used to add two numbers where their one number is in accumulator or not.
- JNC is a 2-bit command which is used to check whether the carry is generated from accumulator or not.
- INC is used to increment an register by 1.
- HLT is used to stop the program.
- AX is an accumulator which is used to load and store the data.
- BX, CX are general purpose registers where BX is used for storing second number and CX is used to store carry.
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