DOS Protect Mode Interface

The DPMI can access memory above 1MB and is addressable by systems with an Intel 80386 (or higher) microprocessor. OS/2 2.0 DPMI supports the process address space.

Protect mode refers to the operational mode that enables an Intel microprocessor to use the address space above 1MB. In this mode, the microprocessor also provides memory protection and prevents access to certain operating system instructions, called privileged instructions.