What Is Important To Know Conventional memory is the first 640KB of the first megabyte of memory. Upper memory is the remaining 360KB of the first megabyte of memory. Extended memory is the memory from 2-16MB that can be addressed by 286 or faster processors. Expanded memory is memory that is not used by DOS but can still be addressed by 8088 processors. This is defined by the LIM EMS standard.
Virtual memory makes use of a swap file.
A swap file is managed by Windows and cheats the system into using hard disk space as memory. A memory conflict occurs when one device or process accesses memory that is being used by another device or process. General protection faults and invalid page faults are common memory conflicts. Conflicts happen because the operating system is unaware of the memory addressing requirements of one or more programs or devices. This increases the potential for a memory overlap.