• Thumbnail for DOS memory management
    In IBM PC compatible computing, DOS memory management refers to software and techniques employed to give applications access to more than 640 kibibytes...
    15 KB (2,204 words) - 18:06, 16 January 2025
  • Thumbnail for Upper memory area
    In DOS memory management, the upper memory area (UMA) is the memory between the addresses of 640 KB and 1024 KB (0xA0000–0xFFFFF) in an IBM PC or compatible...
    10 KB (1,414 words) - 23:54, 5 May 2025
  • Thumbnail for Extended memory
    In DOS memory management, extended memory refers to memory above the first megabyte (220 bytes) of address space in an IBM PC or compatible with an 80286...
    9 KB (1,148 words) - 06:34, 2 May 2025
  • Thumbnail for Conventional memory
    In DOS memory management, conventional memory, also called base memory, is the first 640 kilobytes of the memory on IBM PC or compatible systems. It is...
    26 KB (3,336 words) - 10:23, 4 July 2024
  • Thumbnail for Expanded memory
    In DOS memory management, expanded memory is a system of bank switching that provided additional memory to DOS programs beyond the limit of conventional...
    18 KB (2,190 words) - 22:49, 2 May 2025
  • Thumbnail for High memory area
    In DOS memory management, the high memory area (HMA) is the RAM area consisting of the first 65520 bytes above the one megabyte in an IBM AT or compatible...
    26 KB (2,736 words) - 19:32, 31 May 2024
  • DOS Protected Mode Services (DPMS) is a set of extended DOS memory management services to allow DPMS-enabled DOS drivers to load and execute in extended...
    39 KB (3,681 words) - 17:13, 29 March 2025
  • EMM386 (category DOS memory management)
    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...
    9 KB (721 words) - 05:07, 5 February 2025
  • HIMEM.SYS (category DOS memory management)
    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...
    4 KB (319 words) - 04:11, 6 December 2024
  • DPMS may refer to: DOS Protected Mode Services, a set of extended DOS memory management services since 1992 VESA Display Power Management Signaling, a graphics...
    336 bytes (72 words) - 14:58, 19 September 2018
  • Extended VCPI (XVCPI) to make the memory management and multitasking capabilities of the 386 available for extended DOS applications. When it turned out...
    26 KB (2,741 words) - 23:28, 23 June 2024
  • program running under DOS that uses a system call to return control to DOS as though it has finished, but remains in computer memory so it can be reactivated...
    13 KB (1,799 words) - 17:13, 14 December 2024
  • LOADHIGH (redirect from LH (DOS command))
    is an internal DOS command in COMMAND.COM that is used to load a program into the upper memory area (UMA) instead of conventional memory. The command was...
    8 KB (660 words) - 17:26, 15 October 2023
  • uses this feature (both 286 and 386 variants) to address extended memory, unless DOS is switched to run in a virtual 8086 mode that is incompatible with...
    15 KB (1,327 words) - 13:36, 26 January 2024
  • Virtual Control Program Interface (category DOS memory management)
    expanded memory manager in DOS (e.g. CEMM, QEMM, later EMM386) and does allow 80386 protected-mode DOS extenders to coexist with 80386 EMS expanded memory emulators...
    15 KB (1,459 words) - 06:44, 12 January 2025
  • Thumbnail for MS-DOS
    line interpreter Bad command or file name – MS-DOS error DOSBox – Free MS-DOS emulator DOS memory management – Techniques employed to give applications access...
    92 KB (9,614 words) - 10:30, 20 May 2025
  • Atari DOS is the disk operating system used with the Atari 8-bit computers. Operating system extensions loaded into memory were required in order for an...
    19 KB (2,429 words) - 20:52, 25 February 2025
  • Thumbnail for DR-DOS
    this as "PC DOS 6.1", because IBM PC DOS 6.1 also reported as DOS 6.0 to applications. Novell DOS 7 introduced much advanced memory management including...
    121 KB (12,096 words) - 22:17, 9 May 2025
  • RAM limit (category DOS memory management)
    of physical memory. PAE and 64-bit systems may be able to address up to the full address space of the x86 processor. DOS memory management Motherboard...
    12 KB (1,742 words) - 15:02, 23 March 2025
  • It was the most popular third-party memory manager for the MS-DOS and other DOS operating systems. QRAM A memory manager for Intel 80286 or higher CPUs...
    22 KB (3,171 words) - 14:52, 24 January 2025
  • virtual DOS monitor and paged memory management Microsoft to Release Own DOS 3.3, InfoWorld, August 3, 1987 EMS Update Gives DOS Improved Multitasking, InfoWorld...
    235 KB (7,271 words) - 21:36, 24 April 2025
  • PCI hole (redirect from PCI memory hole)
    64 KB of memory or less; it was designed to take a maximum of 640 KB. This rapidly became a restriction that had to be handled by complex DOS memory management...
    7 KB (1,124 words) - 00:14, 19 March 2024
  • Virtual DMA Services (category DOS memory management)
    Services (VDS) refer to an application programming interface that allow DOS and Win16 applications and device drivers to perform DMA operations while...
    725 bytes (46 words) - 16:51, 28 June 2020
  • Helix HeadRoom (category DOS memory management)
    HeadRoom is a DOS context switching and multitasking memory manager produced by Helix Software Company in the late 1980s and early 1990s. HeadRoom managed...
    4 KB (430 words) - 09:20, 18 October 2023
  • Thumbnail for Garbage collection (computer science)
    automatic memory management. The garbage collector attempts to reclaim memory that was allocated by the program, but is no longer referenced; such memory is...
    40 KB (4,054 words) - 19:14, 19 April 2025
  • operating systems, memory management is the function responsible for managing the computer's primary memory.: 105–208  The memory management function keeps...
    11 KB (1,334 words) - 18:13, 26 February 2025
  • Thumbnail for DOS
    DOS/360 from 1966. Others include Apple DOS, Apple ProDOS, Atari DOS, Commodore DOS, TRSDOS, and AmigaDOS. IBM PC DOS (and the separately sold MS-DOS)...
    56 KB (6,507 words) - 04:13, 20 May 2025
  • with the Intel 80386), to cope with the memory limitations of DOS. A DOS extender is a program that "extends" DOS so that programs running in protected...
    12 KB (1,454 words) - 06:24, 24 September 2024
  • northern sky Uniform memory access, a shared memory architecture in parallel computers Upper memory area, in DOS memory management User-Managed Access...
    1 KB (202 words) - 20:49, 19 October 2024
  • commands provided by the MS-DOS disk operating system (DOS), especially as used on an IBM PC compatible computer. Other DOS variants as well as the legacy...
    45 KB (5,764 words) - 11:44, 20 May 2025