I am experimenting with OEM installations and to this end I'm using a piece of configuration software called opkwiz (OEM Preinstallation Kit Wizard). One step in the preinstallation is done in DOS mode and the configuration calls for "real mode drivers" to be added to autoexec.bat and/or config.sys files.

What are "real mode drivers" and how should I look for what these additions should be?

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Build your own computer... An Introduction