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Topic: Extended memory


  
 Extended memory - Wikipedia, the free encyclopedia
Extended memory is only available on PCs based on the Intel 80286 or higher processor, as only these chips can access more than 1 MB of RAM.
In this case, the extended memory is provided by a supervising protected-mode operating system such as Microsoft Windows.
Extended memory refers to memory above the first megabyte of address space in an IBM PC with an 80286 or later processor.
http://en.wikipedia.org/wiki/Extended_memory

  
 MS-DOS Memory Issues
Extended memory can be used as expanded memory by using software and the 80286 or 80386 chips to "remap" it to the lower 1MB.
Software that will convert extended memory to expanded memory on an 80286 machine is not written to use the special hardware built into the 80386 chip, so the same type of performance penalty may apply.
Most likely this memory is mapped into a region using 386 memory management hardware and software or special chipsets on the motherboard, rather than physically existing there.
http://www.dewassoc.com/support/msdos/msdos_memory.htm

  
 A General Tutorial on the Various Forms of Memory
These systems have 1 MB of conventional memory on their motherboard, and this extra 384K of "built-in memory" is mapped to the top of extended memory, because the UMA already occupies the upper 384K of conventional memory.
This area of memory is controlled exclusively by the extended memory manager (such as HIMEM.SYS), which is in turn called by systems software (such as Windows) and applications software.
The extended memory area is an area of memory that is available only on 80286 and 80386 systems.
http://support.microsoft.com/?kbid=37242

  
 Expanded Memory (EMS)
Extended memory is the most "natural" way to use memory beyond the first megabyte, because it can be addressed directly and efficiently.
In modern systems, the memory that is above 1 MB is used as extended memory (XMS).
This concept is called bank-switched memory, and in a way is not all that different from virtual memory, except here the swapping isn't being done to disk but rather to other areas of memory.
http://www.pcguide.com/ref/ram/umaEMS-c.html

  
 MS-DOS Memory Basics
Memory controlled by HIMEM.SYS is referred to as XMS (Extended Memory Specification) a standard developed by Lotus, Intel, Microsoft, and AST.
XMS (Extended Memory Specification) is a standard for extended memory that was developed jointly by Lotus, Intel, Microsoft and AST.
However, this additional memory did not immediately solve the problem because applications were still being written to operate within the 640K barrier.* With the advent of Windows and its ability to effectively make extended memory available to applications, the significance of conventional memory was diminished.
http://www.frick-cpa.com/dos/DOS_Memory_1.asp

  
 Memory Management Technical Details
Extended memory is a seamless continuation of the original 1 MB address space on 80286/80386 and newer computers.
Conventional memory is the first 640K of memory in your machine.
LIM 3.2 expanded memory is fine for storing data such as spreadsheets in expanded memory; however, because the LIM 3.2 specification does not allow programs to run in expanded memory, it is not useful for multitasking.
http://www.billssite.com/memory.htm

  
 An Overview of Memory Management
Extended memory is only available for computers based on the 286 and later chips.
Memory and the PC In the early days of personal computers, most machines could access only 64 KB of memory.
These useful programs are known as memory resident software or terminate-and-stay-resident programs.
http://www.qualitas.com/product/max/history.htm

  
 Microsoft Online Crash Analysis
Memory modules are installed on the main circuit board of a personal computer (also known as the motherboard).
Replace the memory module currently in your computer with the one that works correctly.
There are several components that comprise the memory system including the individual RAM modules, the memory sockets on the motherboard, the motherboard chipset, the microprocessor, and the microprocessor cache.
http://oca.microsoft.com/en/windiag.asp

  
 What is extended memory? - A Word Definition From the Webopedia Computer Dictionary
Extended memory, on the other hand, is not configured in any special manner and is therefore unavailable to most DOS programs.
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.
http://www.webopedia.com/TERM/E/extended_memory.html

  
 Application Note: MIU - Extended Memory
The sampling process is configurable from the host computer to optimize the memory usage for the application.
This memory is configurable from the host computer and can be assigned to the four meter ports as needed in 4KB blocks.
For history storage applications, the number of bytes to be stored per sample can be varied depending upon the input data rate, (usually pulses/sec.
http://www.reactelplusmdas.com/xmem.html

  
 Extended Memory Specification (XMS). Version 3.0
The memory pool reported on is the same as that reported on by the existing Query Free Extended Memory function.
This function is similar to the existing Allocate Extended Memory, except that it uses a 32-bit instead of a 16-bit value to specify the amount of memory requested.
This function is similar to the existing Reallocate Extended Memory, except that it uses a 32-bit instead of a 16-bit value to specify the amount of memory requested.
http://www.nist.fss.ru/hr/doc/spec/xms30.htm

  
 MSN Encarta - Search Results - Extended Memory
Extended Memory, in computer science, system memory beyond 1 megabyte (MB) in computers based on the Intel 80286/386/486 microprocessors.
Computer Memory, a mechanism that stores data for use by a computer.
MSN Encarta - Search Results - Extended Memory
http://encarta.msn.com/Extended_Memory.html

  
 Determing the amount of available extended memory.
When extended memory is allocated an application will usually hook the int 15h and monitor calls to function 88H; the new interrupt handler will only return the memory that it is not use by the application.
This is a result of the method used by memory managers and other applications accessing/using extended.
Most Memory Managers will hook interrupt 15h and return a modified result when function 88h is called.
http://community.borland.com/article/0,1410,16260,0.html

  
 Extended Memory (XMS)
The first 64 KB or so of extended memory is the so-called high memory area (HMA) and is accessible in real mode due to the residual effects of a bug in the original Intel 80286, as described here.
This name comes from the fact that this memory was added as an extension to the base 1 MB that represented the limits of memory addressability of the original PC's processor, the Intel 8088.
On systems that use this system, part of the extended memory will not be available for use by programs.
http://www.pcguide.com/ref/ram/logicXMS-c.html

  
 Extended Memory
Physical Memory above 1 Megabyte for PC's with an 286 or above microprocessor (or simulating these microprocessors).
http://www.users.bigpond.com/jenkos/GEXTENDE.htm

  
 XMS - eXtended Memory Specification
XMS (Extended Memory) is the memory above 1088k which is used for DOS programs requiring more than memory than available in conventional memory.
In DOS, Extended Memory is that memory above the initial 1024K.
eXtended Memory System - Memory area between 640kb (basic memory) and 1024kb.
http://www.auditmypc.com/acronym/XMS.asp

  
 EMM - Expanded Memory Manager, Extended Memory Management
Expanded Memory Manager - Handler to use the extra memory of the computer optimal, for example used by Windows (emm386.exe) and by Quarterdeck's Expanded Memory Manager (QEMM).
EMMs were originally created for expanded memory boards, but can also use the memory management capabilities of the 386 or later processors to emulate an expanded memory board.
Expanded Memory Manager, a program which manages expanded memory (qv).
http://www.auditmypc.com/acronym/EMM.asp

  
 Extended Memory Handle Table - Look here first for the best memory sites on the web today!
Table kept in memory of all extended graphics with ASCII codes greater than 127.
management functions were also provided, offering extended features for this new memory management system...
program that has extended the handle table, DOS memory will be fragmented...
http://memory.3rdwebdir.com/index.php?k=extended-memory-handle-table

  
 Extended Memory Specification - Wikipedia, the free encyclopedia
Memory is made available by extended memory manager (XMM) software.
XMS or Extended Memory Specification is the specification describing the use of IBM PC extended memory in real mode for storing data (but not executable code).
The XMM functions are accessible through interrupt 2FH.
http://en.wikipedia.org/wiki/XMS

  
 [No title]
Intel &; Extended Memory 64 TechnologyΦ (Intel &; EM64T) combined with supporting software enables 64-bit computing on desktop and server/workstation platforms.
Intel &; Extended Memory 64 Technology is one of a number of innovations added to Intel's Server/Workstation platforms.
Intel Extended Memory 64 Technology (Intel EM64T) enables the desktop processor platform to access larger amounts of memory.
http://www.intel.com/cd/business/enterprise/apac/eng/bss/220924.htm

  
 dBforums - DB2 shared memory and extended storage
extended memory is a much more efficient use of memory than file
memory and then let the wizard allocate it among the components.
>memory and then let the wizard allocate it among the components.
http://dbforums.com/t950128.html

  
 Intel(R) Extended Memory 64 Technology
SGI believes that the emergence of 64-bit extension technology is an acknowledgement of the limitations of today's 32-bit environments for many computing workloads.
With increased memory space, SQL Server customers can process complex queries more quickly and more easily manage large working data sets.
The combination of the Itanium® 2 processor and SGI’s NUMAflex architecture have demonstrated performance and function unmatched by competing RISC, 32-bit and 64-bit extended 32-bit systems for technical computing.
http://www.intel-inside.ca/technology/64bitextensions/testimon.htm

  
 Memory
All these "enhanced" memory managers use the computer's extended memory to "simulate" expanded RAM (EMS).
Small memory foot print: MOUSE.EXE takes only 1 KB of upper DOS memory (the stub) and 54 KB of extended memory (the driver) when loading Helix Cloaking technology (CLOAKING.EXE) with LOADHIGH in Autoexec.bat, if an upper memory manager is loaded from Config.sys.
Contrary to what you may have read/heard, expanded memory is STILL needed by certain (older) DOS applications and games that canNOT be executed from a DOS box/session/window INSIDE the Windows GUI, and DOES NOT slow down your computer's performance.
http://www.kisser.net.au/tontodan/Memory.html

  
 Dictionary of Computers - extended memory
operating system and requires an extended memory manager.
The design may have been inspired by the pre-1958 Iraqi flag.
http://www.tiscali.co.uk/reference/dictionaries/computers/data/m0044478.html

  
 extended memory manager from FOLDOC
< software, storage > (XMM) The memory manager software implementing Extended Memory Specification, such as HIMEM or QEMM386.
Nearby terms: eXtended Graphics Array « Extended Industry-Standard Architecture « extended memory « extended memory manager » Extended Memory Specification » Extended ML » Extended Pascal
XMM's can usually also act as A20 handlers.
http://wombat.doc.ic.ac.uk/foldoc/foldoc.cgi?XMM

  
 Annoyances.org - re: not enough extended memory (Windows XP Discussion Forum)
Annoyances.org - re: not enough extended memory (Windows XP Discussion Forum)
Please do not plagiarize; redistributing these pages without permission is strictly prohibited.
http://www.annoyances.org/exec/forum/winxp/1069950551

  
 Ideabroker: Extended Memory
I'm dumb, have bad memory, but above all I'm lazy!
This is a paragraph of text that could go in the sidebar.
I type a lot of recurring sentences, or need different lines to cut and past in textfiles or in my OpenBC or Linkedin invites.
http://ideabroker.blogspot.com/2005/05/extended-memory.html

  
 AOR EM8200 Extended Memory Card
The extended memory card enables the whole 1000 memory channels in 20 banks to be backed up.
The memory card can hold the entire contents of the AR8200 including enviromental operating data and band scope four times in locations 0, 1, 2 & 3.
It is not necessary to save all data, you can specifically choose what data is to be backed up and to which location.
http://www.grove-ent.com/ACC27.html

  
 Extended memory management with POSIX
module allows to extend the memory available to a process running on a POSIX system to a virtually infinite amount, by making use of the
Last modification: Fri May 3 11:15:19 CEST 2002
Download the documentation in PDF format (153 kbytes)
http://ndevilla.free.fr/memory

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