4) Mapped Address Space

Each virtual computer would not have its own central memory, to be referenced by load and store machine instructions. Instead, associated with each process would be a map which converts each load and store memory address into a file and address within the file. A load instruction will load a register with a word from some file, and conversely, a store instruction will place the contents of a register into a file. Thus, only one concept of data storage facility need be designed, files, rather than two, files and process memories.