DOS memory management

computer program that returns control to a non-multitasking OS without exiting, simulating a background process or service

Section of computer memory in PC compatibles

system of bank switching in DOS memory management

first 640K of RAM under DOS

the 384KiB area of physical memory between 640KiB and 1024KiB on IBM PC compatibles

65,520 byte memory area, beginning at 1 MiB, on x86 systems operating in real mode

API for MS-DOS allowing programs to access protected mode on 386 (and later) CPUs

variant of real mode in x86 computing

EMM386 is the expanded memory manager of Microsoft's MS-DOS, IBM's PC DOS, Digital Research's DR-DOS, and Datalight's ROM-DOS which is used to create expanded memory using extended memory on Intel 80386 CPUs. There also is an EMM386.EXE available in FreeDOS.

HIMEM.SYS is a DOS device driver which allows DOS programs to store data in extended memory according to the Extended Memory Specification (XMS). The memory beyond the first 1 MB of address space is required by Windows 9x/Me in order to load; therefore, these versions of Microsoft Windows require HIMEM.SYS to be loaded to be able to run.

Software interface that allows the simultaneous running of several DOS programs as well as the direct addressing of the expansion memory in protected mode.