Nostalgia - Hello World - Amiga 500

start
    ldx #$00
loop
    lda text,x
    sta $0400,x 
    beq finish
    inx
    jmp loop
finish
    rts
text .byte 8,5,12,12,15,32,23,15,18,12 
      .byte 4,33,0

Output : Hello World! 

I missed those days a lot ...