How to use print string in assembly language?

How to use print string in assembly language?

8086 program to print a String

1. Create a string.
2. Load the effective address of the string in dx using LEA command.
3. Print the sting by calling the interrupt with 9H in AH.
4. The string must be terminated by ‘$’ sign.

How string is defined in assembly language?

String Instructions

1. MOVS − This instruction moves 1 Byte, Word or Doubleword of data from memory location to another.
2. LODS − This instruction loads from memory.
3. STOS − This instruction stores data from register (AL, AX, or EAX) to memory.
4. CMPS − This instruction compares two data items in memory.

What is MSG in assembly language?

msg is a label which is equivalent to the memory location of the first byte of the string “Hello, World!\ n” . set is a directive which sets a symbol (len) equal to the value of an expression (in this example, “. – msg” meaning the current memory location minus the value of the label “msg”).

What does mov ah 4CH mean?

MOV AH, 4CH means store (or “move”) the hexadecimal value 4C into register AH . In MS-DOS, invoking interrupt 21h while AH = 4Ch causes the current process to terminate and uses the value of register AL as the exit code of the process.

What is Movzx Assembly?

movzx reads the contents of the register or effective address as a word or byte. movzx then sign-extends the 16- or 32-bit value to the operand-size attribute of the instruction. The result is stored in the destination register by movzx. Previous: Move With Sign Extend (movsx)

Is INC faster than add?

ADD is not always faster than INC , but it is almost always at least as fast (there are a few corner cases on certain older micro-architectures, but they are exceedingly rare), and sometimes significantly faster. For more details, consult Intel’s Optimization Reference Manual or Agner Fog’s micro-architecture notes.

What is the function of MOV A 21h?

What is the function of MOV A 21H?

What is Dosseg?

DOSSEG is what is called an assembler directive. It is not assembly language, but a code telling the assembler to perform a certain task. In this case, it tells the assembler to use paragraph alignment for all segments.

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