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The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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;* HELLOC.ASM illustrates .COM files with full segment directives.
;* Assemble with the "Generate .COM File" linker flag or the
;* /TINY QCL option.
;*
;* Shows:    Directives - SEGMENT   ASSUME    ORG
;*
;* See HELLO.ASM for a simplified segment version or HELLOF.ASM
;* for a full-segment .EXE file version.
 
_TEXT   SEGMENT WORD PUBLIC 'CODE'
        ASSUME  cs:_TEXT, ds:_TEXT
        ORG     100h
 
first:  jmp     start                   ; Jump over data
 
msg     DB      "Hello, world.", 13, 10, "$"
 
start:  mov     ah, 9h                  ; Request DOS Function 9
        mov     dx, OFFSET msg          ; Load DX with offset of string
                                        ;   (segment already in DS)
        int     21h                     ; Display String to Standard Output
 
        mov     ax, 4C00h               ; Exit functions with 0 in AL
        int     21h                     ; Exit Program with Return Code
 
_TEXT   ENDS
 
        END     first
                                    -♦-