Article: Q47504
Product(s): Microsoft Macro Assembler
Version(s): MS-DOS: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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Using an instruction that requires a 80186, 80286, or 80386 processor may cause
the Microsoft Macro Assembler (MASM) 5.1 to generate the one of the following
errors:
A2066: Must have instruction after prefix.
A2105: Expected: instruction, directive, or label
and MASM 6.0 to generate the following error:
A2085: instruction or register not accepted in current CPU mode
The error occurs because the default assembly mode is 8086. The .186, .286,
.286p, .386, or .386p directive must be placed in the source code prior to any
instructions that require those modes.
In addition, MASM 6.0 supports 80486 instructions.
MORE INFORMATION
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The following information is taken from page 621 of the "Microsoft Macro
Assembler Programmer's Guide" for MASM 6.0
80186 Processor Instructions
BOUND INSW OUTSW
ENTER LEAVE POPA
INS OUTS PUSHA
INSB OUTSB PUSHW*
80286 Processor Instructions
ARPL SIDT VERR
LAR SLDT VERW
LSL SMSW
SGDT STR
80286 and 80386 Privileged-Mode Instructions
CLTS LIDT LMSW
LGDT LLDT LTR
80386 Processor Instructions
BSF LSS SETNAE
BSR MOVSD SETNB
BT MOVSX SETNBE
BTC MOVZX SETNC
BTR OUTSD SETNE
BTS POPAD SETNG
CDQ POPFD SETNGE
CMPSD PUSHAD SETNL
CWDE PUSHD* SETNLE
INSD PUSHFD SETNO
IRETD SCASD SETNP
IRETDF* SETA SETNS
IRETF* SETAE SETNZ
JECXZ SETB SETO
LFS SETBE SETP
LGS SETC SETPE
LODSD SETE SETPO
LOOPD* SETG SETS
LOOPED* SETGE SETZ
LOOPNED* SETL SHLD
LOOPNZD* SETLE SHRD
LOOPZD* SETNA STOSD
80486 Processor Instructions
BSWAP* INVD* WBINVD*
CMPXCHG* INVLPG* XADD*
* New to MASM 6.0
Additional query words: kbinf 5.00 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 : MS-DOS:5.0,5.1,5.1a,6.0,6.0a,6.0b
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