CODEWITHSUNDEEP
assemblyx86nasmdata-segment
Flask_KR
Flask_KR

Reputation: 269

How can I read data from data segment using x86 assembly?

Im using nasm32, x86 assembly language. I want to read some number from data segment.

.model small 
.stack
.data 
  DATA1 DB 53H,"$"
  DATA2 DB 17H,"$"
.code
.startup
  mov dx, @data
  mov dx, offset DATA1
  add dl,30h
  mov ah, 02h
  int 21h

  mov dl, dh
  add dl, 30h
  mov ah, 02h
  int 12h
  .exit
end

This code return just

20

I supposed DATA1 53h (= 83 (decimal)) value will return. (in ascii character)

But strange number is return. what happened? I don't understand this result.

And how can I fix this code?

Upvotes: 1

Views: 3246

Answers (1)

Jens Björnhager
Jens Björnhager

Reputation: 5649

You're not setting up ds.

mov dx, @data

Did you mean something like:

push @data
pop ds

Upvotes: 1

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