The 8088 processors used in the IBM PCs, XTs and compatibles only have the capability of directly addressing 1MB of RAM. This limit was greatly increased when the 80286 was built with the ability to address 16MB of RAM. The memory above the first MB in an 80286 and 80386 computer is referred to as "extended" memory. Unfortunately, the 640K limit still exists for most MS-DOS programs. A few programs have the capability of using extended memory; however, a more common option is to use a memory manager or device driver to allow the extended memory to emulate "expanded" memory. (7/96)
Memory above the 1MB mark in an 80286/386 machine. Used in OS/2 and Windows/386 environments. Not much use in a DOS environment. Obsolete.
Memory above 1Mb in 80286 and higher computers. Can be used for RAM disks, disk caches, or Microsoft Windows, but requires the processor to operate in a special mode (protected mode or virtual real mode). With a special driver, you can use extended memory to create expanded memory. See also memory, RAM, ROM
System memory beyond 1 megabyte in computers based on the Intel 80x86 processors. This memory is accessible only when an 80386 or higher-level processor is operating in protected mode or in emulation on the 80286. To use extended memory, MS-DOS programs need the aid of software that temporarily places the processor into protected mode or by the use of features in the 80386 or higher-level processors to remap portions of extended memory into conventional memory. Extended memory is not an issue in Windows 9x, all versions of Windows NT, Windows 2000, and Windows XP.
Memory beyond 1MB on computers using the Intel 80386 and later processors, not configured for expanded memory.
(XMS) - Linear memory extending beyond the one (1) megabyte (MB) limit of DOS. Extended memory is only available on 80286-and-above machines; it is off-limits to 8088s and 8086s. (The distinction between conventional, expanded, and extended memory does not exist on a UNIX machine.)
Memory beyond 1MB. Many MS-DOS applications require that you configure this memory as expanded memory, hard RAM or a virtual disk. Microsoft Windows 3.x, MS OS/2 and some MS-DOS application programs can use extended memory directly through the eXtended Memory Specification (XMS).
Memory beyond 1 megabyte. Windows uses extended memory to manage and run applications. Extended memory typically is not available to non-windows applications or MS-DOS.
Memory that isnâ€(tm)t accessible from real mode on Intel 80x86 processors. When Windows is running in protected (Enhanced or Standard) mode, all application memory is extended.
The area of memory above 1024K. The first 64K of extended memory is the high memory area (HMA); the rest is made of extended memory blocks. See also conventional memory, expanded memory (EMS), extended memory blocks, high memory area (HMA), upper memory blocks (UMBS).
Extra memory (above 640k) on your 80286 or 80386 compatible computer. Not normally usable by DOS applications, but may be configured as a virtual drive or a disk cache on an 80286 computer, or as Expanded Memory on an 80386 computer.
Memory above 1 MB on 80286, 386* and i486*-based computers; see also Chapter 10, ``Managing Memory'' for information.
Personal computer memory that is addressed by DOS, from 1MB to 16MB, to increase conventional memory and expanded memory. Contrast with conventional memory and expanded memory.
Extended memory refers to memory that Windows can access past the first MB (Megabyte) of memory from your system.
Physical memory above 1 megabyte that can be addressed by 80286–80486 machines in protected mode. Adding a memory card adds extended memory. On 80386-based machines, extended memory can be made to simulate expanded memory by using a memory-management program.
Memory above and beyond the standard 1MB (megabyte) of main memory that DOS supports. Extended memory is only available in PCs with an Intel 80286 or later microprocessor. Two types of memory can be added to a PC to increase memory beyond 1MB: expanded memory and extended memory. Expanded memory conforms to a published standard called EMS that enables DOS programs to take advantage of it. Extended memory, on the other hand, is not configured in any special manner and is therefore unavailable to most DOS programs. However, MS-Windows and OS/2 can use extended memory.
Memory above 1 MB. Most software that can use it, such as the Windows 98 operating system, requires that extended memory be under the control of an extended memory manager ( XMM).[Fahrenheit] A temperature measurement system where 32° is the freezing point and 212° is the boiling point of water.
System memory above 1MB. The reader is initially configured with 64K of extended memory available, which is allocated for use by Intermec applications (IC.EXE and IRL). The reader provides extended memory for control and access to RAM above 1MB. The extended memory conforms to XMS specification 2.0. Extended memory is initialized and managed by the HIMEM.SYS driver.
Any memory above the standard 640K that performs the same way as the standard memory. Extended memory is directly available to the processor in your computer, unlike expanded memory, in which data must be swapped into and out of the standard memory. Most additional memory in new computers is extended. See also expanded memory.
Refers to RAM above 1 Meg.
Physical memory above one megabyte.
In an IBM or compatible PC, the memory above the 1 Mb address range. Uses XMS (eXtended Memory Specification).
a continual block of memory addressed from 1MB to the total amount of memory in the computer.
Memory in addition to conventional memory that is not readily accessible to MS-DOS or MS-DOS applications. Extended memory cannot be used on older PC's, such as 8086/88 computers.
Memory beyond one megabyte in 80286, 80386, 80486, and Pentium computers. See also: expanded memory
n. System memory beyond 1 megabyte in computers based on the Intel 8086 processors. This memory is accessible only when an 80386 or higher-level processor is operating in protected mode or in emulation on the 80286. To use extended memory, MS-DOS programs need the aid of software that temporarily places the processor into protected mode or by the use of features in the 80386 or higher-level processors to remap portions of extended memory into conventional memory. Programs running under Microsoft Windows, OS/2, and other operating systems that run on Intel processors and use the protected mode of the 80386 and higher-level processors can access all system memory in the same way. See also EMS, extended memory specification, protected mode.
Extended memory refers to memory above the first megabyte of address space in an IBM PC with an 80286 or later processor.