Microsoft KB Archive/77850

= Lotus 1-2-3 Release 3 and MS-DOS 5.0 =

Article ID: 77850

Article Last Modified on 11/22/1999

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APPLIES TO


 * Microsoft MS-DOS 5.0 Standard Edition

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This article was previously published under Q77850



SUMMARY
Executing Lotus 1-2-3 Release 3 with MS-DOS 5.0 may cause any of the following problems:


 * computer lock up when loading 1-2-3
 * keyboard lock up
 * having to press a key several times to get a response
 * beeping when pressing a key
 * typing a character and having a different character displayed

The following error message may also be encountered:

UNEXPECTED INTERRUPT

Lotus provides a series of SET DOS16M environment commands to be used in the AUTOEXEC.BAT file to resolve these problems.

This information applies to Microsoft MS-DOS version 5.0.



MORE INFORMATION
These errors may occur if using a nonstandard technique for switching from protected mode to real mode.

The Lotus series of SET DOS16M commands are specific to certain computer configurations and may eliminate these errors. These commands, as stated below, can be entered in at the MS-DOS prompt for testing before starting Lotus 1-2-3 Release 3. Reboot the computer after trying each different command. After finding the one that works, add it to the AUTOEXEC.BAT file. Command           Application ---           --- SET DOS16M=10      Use these commands for 80286 machines SET DOS16M=10,750 using the &quot;fast&quot; method of switching from protected to real mode.

SET DOS16M=9      Use these commands for 80286 machines SET DOS16M=9,750  using the &quot;standard&quot; method of                   switching from protected to real mode.

SET DOS16M=13     Use for AST Research 80286 machines with older keyboard ROM chips.

SET DOS16M=7      Use for machines with older Phoenix Technologies ROM chips.

SET DOS16M=6      Use for some AT&T PC 6300 series machine.

SET DOS16M=2      Use for IBM PS/2 80286 machines.

SET DOS16M=3      Use for some 80386 computers without VCPI drivers. If none of the above commands solve the problem, Lotus has a utility, available at no cost, called CHK1-2-3 that will identify the hardware in the system and suggest changes that will help run Release 3. CHK1-2-3 can be obtained from a local Lotus authorized reseller, a Lotus sales representative, or a Lotus authorized training center.

The products included here are manufactured by vendors independent of Microsoft; we make no warranty, implied or otherwise, regarding these products' performance or reliability.

Reference(s):

Lotus Customer Service: (800) 345-1043

Lotus Magazine, January 1990, pages 57-63

Additional query words: 5.00 3rdparty

Keywords: KB77850

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