Article: Q50405
Product(s): Microsoft Macro Assembler
Version(s): 5.0,5.1,5.1a,6.0,6.0a,6.0b
Operating System(s):
Keyword(s):
Last Modified: 06-MAY-2001
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The information in this article applies to:
- Microsoft Macro Assembler (MASM), versions 5.0, 5.1, 5.1a, 6.0, 6.0a, 6.0b
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SUMMARY
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The PTR operator can be used to specify the size of a register indirect operand
for a CALL or JMP instruction. However, the qualifying operators are not NEAR
and FAR, but WORD and DWORD. For example, to make a near jump to label xxx, use
JMP WORD PTR xxx
MORE INFORMATION
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The following example demonstrates how to generate an indirect far call and an
indirect far jump in MASM.
Sample Code
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; Assemble options needed: none
.model large
.data
jumptable DD routine1
DD routine2
.code
start: MOV ax, @data
MOV ds, ax
CALL DWORD PTR jumptable
JMP DWORD PTR jumptable+4
RET
cseg SEGMENT word public 'code'
routine1 PROC
RET
routine1 ENDP
routine2 PROC
RET
routine2 ENDP
cseg ENDS
END start
Additional query words: kbinf 5.10 5.10a 6.00 6.00a 6.00b
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Keywords :
Technology : kbMASMsearch kbAudDeveloper kbMASM510 kbMASM600 kbMASM500 kbMASM600a kbMASM510a kbMASM600b
Version : :5.0,5.1,5.1a,6.0,6.0a,6.0b
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