DOCERR: SMSW, SGDT, SIDT, SLDT, VERR, VERW Don't AssembleLast reviewed: November 3, 1994Article ID: Q39439 |
The information in this article applies to:
SUMMARYThe ".286" and ".386" operands do not allow the following to assemble:
SMSW, SGDT, SIDT, SLDT, VERR, and VERWOne or two error messages are generated for each occurrence of these instructions.
MORE INFORMATIONPage 412 (section 20.3) of the "Microsoft Macro Assembler Programmer's Guide" is incorrect in saying that these instructions require "privileged mode." Also, SMSW is spelled incorrectly (as "SMCW"). These instructions are allowed in all modes; however, behavior may differ between real and protected modes. The reference guide is also incorrect on several addressing points. See the Intel "80286 and 80287 Programmer's Reference Manual" for more information. The following is a sample program: ........................................................................ ; The following program demonstrates : dosseg .286 .model large .data table dw 64 dup (?).code start: SMSW ax SGDT table SIDT table SLDT ax VERR ax VERW ax end start...................................................................... C> masm test,,,; Microsoft (R) Macro Assembler Version 5.10 Copyright (C) Microsoft Corp 1981, 1988. All rights reserved. test.ASM(6): error A2105: Expected: instruction, directive, or label test.ASM(7): error A2105: Expected: instruction, directive, or label test.ASM(8): error A2105: Expected: instruction, directive, or label test.ASM(9): error A2105: Expected: instruction, directive, or label test.ASM(10): error A2105: Expected: instruction, directive, or label test.ASM(11): error A2105: Expected: instruction, directive, or label
24002 Bytes symbol space free 0 Warning Errors 6 Severe Errors.......................................................................
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Additional reference words: 5.00 5.10 5.10a
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