Hello world in 22 bytes · yearone.cloud

YEARONE

.. the interrupt vector changed during the night

[ C O D E ]

11.10.2026 · 4 min

TITLE..........Hello world in 22 bytes

DATE..........11.10.2026

TAGS..........x86, dos, com

SIZE..........4 min

No headers, no linker, no runtime. A .com file is loaded at 100h and simply starts executing.

Seven instructions, one interrupt, a dollar-terminated string. That is the whole program.

[ hello.asm ]

asm · 7L

1; nasm -f bin hello.asm -o hello.com

2org 100h

3 mov dx, msg ; ds:dx -> string

4 mov ah, 09h ; dos: print string

5 int 21h

6 ret ; back to dos

7msg db 'year one.$'

-- READ ONLY -- utf-8 · asm · 7 lines

; nasm -f bin hello.asm -o hello.com
org 100h
    mov dx, msg      ; ds:dx -> string
    mov ah, 09h      ; dos: print string
    int 21h
    ret              ; back to dos
msg db 'year one.$'

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