Jump to Absolute Address (24965)

The information in this article applies to:

Microsoft Macro Assembler (MASM) 1.25
Microsoft Macro Assembler (MASM) 1.27
Microsoft Macro Assembler (MASM) 3.0x
Microsoft Macro Assembler (MASM) 4.0
Microsoft Macro Assembler (MASM) 5.0
Microsoft Macro Assembler (MASM) 5.1
Microsoft Macro Assembler (MASM) 5.1a
Microsoft Macro Assembler (MASM) 6.0
Microsoft Macro Assembler (MASM) 6.0a
Microsoft Macro Assembler (MASM) 6.0b

This article was previously published under Q24965

SUMMARY

There are two methods of coding a jump to an absolute address. These methods are as follows:

Use AT to create a segment template beginning at an absolute address. Then, using ORG, a label can be assigned at a specific offset. -or-
Initialize a double word variable to the specific address.

MORE INFORMATION

The following code demonstrates both methods:

; Assembly options needed: none

ASEG SEGMENT BYTE AT 0000H

           ORG 100
far_label  LABEL FAR

ASEG       ENDS


DATA   SEGMENT WORD 'DATA'

FAR_VAR DW   100,0

DATA         ENDS



CODE   SEGMENT BYTE 'CODE'
       ASSUME CS:CODE, DS:DATA

start: mov ax, data
       mov ds, ax

       JMP far_label          ;This is the first type of jump.

       JMP DWORD PTR far_var  ;This is the second type of jump.
CODE   ENDS

END start

Modification Type:	Major	Last Reviewed:	10/22/2003
Keywords:	KB24965