Windows Supports DPMI Specification Level 0.9 Only

ID: Q121962

The information in this article applies to:

Microsoft Windows operating system versions 3.1, 3.11
Microsoft Windows for Workgroups versions 3.1, 3.11
Microsoft Windows 95
Microsoft Windows 98

SYMPTOMS

When you start the programs listed below in Windows, you receive the following error message:

Phar Lap err 74: Can't use - REALBREAK under this version of DPMI

Applications that are known to cause this error message include:

AutoCAD for DOS version 12 by AutoDesk

DOS GIS by Surpac

FIFA Soccer by Electronic Arts

CAUSE

The application that you are trying to run requires services from the DPMI server that are not available in Windows.

Microsoft Windows supports the DPMI specification version 0.9 with the math coprocessor functions 1.0. Phar Lap is a DOS extender that has its own set of libraries of services for the DPMI specification level 1.0. If your MS-DOS-based application needs services from level 1.0 of this specification, it cannot run in Windows.

RESOLUTION

Run the application outside of Windows, in MS-DOS mode.

MORE INFORMATION

When an application is running in real mode, it can invoke a DPMI server. Windows launches a DPMI server when it is loaded; therefore, if you run your application in Windows, it uses the DPMI server that is already present. If the application makes a call to a service that is supported by DPMI 1.0, you receive an error message, and the application halts.

Additional query words: pharlap

Keywords : kb3rdparty kbenv win31 win95 win98 wfwg
Version : 3.10 3.11 95
Platform : WINDOWS
Issue type : kbprb