4. The output Macro (print ASCII characters)

• The output macro displays a string of characters starting at source location in the data segment:

  • output source

  where source is the beginning of a null-terminated string in memory.

• For example:

      .CONST          ; Constant data segment
          TXTPROMPT   BYTE    "HELLO", 0
          ENDL        BYTE    13, 10, 0
          ..
      .CODE           ; Code segment
          ..
          output  TXTPROMPT        ; print HELLO
          output  ENDL             ; print new line
          ..
  

• Characters starting at source address are displayed until a null character is reached.

• The null character terminates the output.

• Flags or registers affected: none.