Executing Lotus 1-2-3 Release 3 with MS-DOS 5.0 may cause any of the
• 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:
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.
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.
SET DOS16M=10 Use these commands for 80286 machines
SET DOS16M=10,750 using the "fast" method of switching
from protected to real mode.
SET DOS16M=9 Use these commands for 80286 machines
SET DOS16M=9,750 using the "standard" 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
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.
Lotus Customer Service: (800) 345-1043
Lotus Magazine, January 1990, pages 57-63