nasm segment directive

Hello,

If I try to assemble to following code with nasm, I get the errors:

u2.asm:5: error: symbol `.data' undefined
u2.asm:16: error: phase error detected at end of assembly.

I read the nasm manual but I still have no clue what I am doing wrong. I
would be pleased if someone could give me a hint how to make the code
work.


Code:

SEGMENT .data
text db 'Hello world$'

SEGMENT .code
mov ax, .data
mov ds, ax
mov dx, [text]
mov ah, 09h
int 21h
mov ah, 08h
keyin: int 21h
cmp al, 27
jne keyin
mov ah, 04ch
mov al, 0h
int 21h


Regards,
Timo
.

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