ORG directive ... "end org" ?

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ouadji

Joined: 24 Dec 2008
Posts: 1081
Location: Belgium

ouadji 29 Mar 2009, 17:57

how to use the "org" directive in a section of code ...
with a beginning and ... a end

"normal" code
JMP toto
;-------------------
org 0000h <--- beginning

my code (origin 0h)

end org ? <--- here is my question ... how close the Directive ??
;-------------------
toto:
resumption of "normal" code

29 Mar 2009, 17:57

LocoDelAssembly
Your code has a bug

Joined: 06 May 2005
Posts: 4624
Location: Argentina

LocoDelAssembly 29 Mar 2009, 18:35

Code:

old = $

org new_base_address

; your code

org $ - $$ + old

29 Mar 2009, 18:35

ouadji

Joined: 24 Dec 2008
Posts: 1081
Location: Belgium

ouadji 29 Mar 2009, 19:03

LocoDelAssembly ... beautiful ! Shocked

I never thought about that !
thank you very much for this solution Razz

29 Mar 2009, 19:03

Azu

Joined: 16 Dec 2008
Posts: 1159

Azu 21 May 2009, 10:55

LocoDelAssembly wrote:

Code:

old = $

org new_base_address

; your code

org $ - $$ + old

I don't understand.. why not just do org old? Confused

21 May 2009, 10:55

LocoDelAssembly
Your code has a bug

Joined: 06 May 2005
Posts: 4624
Location: Argentina

LocoDelAssembly 21 May 2009, 12:40

This code will tell you why:

Code:

org $100

  mov  ah, 9
  mov  dx, msg1
  int  $21

  mov  ah, 9
  mov  dx, msg2
  int  $21

  xor  ax, ax
  int  $16

  int  $20

msg1 db "Message one", 13, 10, '$'

old = $

org $7c00

 db "Hidden message that shouldn't be seen", 13, 10, '$'

org old
msg2 db "Message two", 13, 10, '$'

21 May 2009, 12:40

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