PC memory

Also found in: Dictionary, Medical, Legal.

PC memory

(1) The main memory in a PC, which is made up of dynamic RAM chips. Definition #2 outlines the structure of memory in a PC, much of which was of importance to users back in the 1980s, but has long since been an issue. See memory module, SDRAM and dynamic RAM.

(2) The original PC design was constrained to one megabyte of memory. In addition, certain parts of the operating system were placed into fixed locations in the upper part of memory without any method for cooperatively storing additional drivers and programs. This design gave rise to the most confusing platform in history. Windows 3.0 became very popular because it handled all of the memory types much better than DOS.

Following are the different types of memory in a PC. In other computers, there is just plain memory. In mainframes and supercomputers, there are also large, auxiliary memory banks that function as caches between disk and RAM. See PC memory management.

Memory Type    Location

 Conventional             First 640K

 UMA (Upper Memory Area)  Next 384K

 HMA (High Memory Area)   Next 64K

 Extended Memory          From 1MB up

 EMS (Expanded Memory)    Early spec
                          (memory above
                           1MB bank
                           into UMA)
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
TT-XP was developed by Windows-Help.NET and is one of over twenty software applications marketed worldwide by Rose City Software (http://www.RoseCitySoftware.com), including award winning titles such as the PC Memory tool MemoryBoost Pro, the ultimate tool for monitoring transfer rates DU Meter, and the brilliant new bookmark manager Linkstash.
The company is also considering whether to increase the size of the front-side bus to boost the performance of the chips, speeding up the transfer of data between the processor and the PC memory.
The system includes a battery-backed real-time clock, battery-backed SRAM memory, graphical display, PC memory card slot, optically isolated RS232 interface, the company's standard 9-pin port, and a 7 ampere-hour lead-acid battery.
The Japanese giant, asserting that it wants "to limit its majority position in companies that do not operate totally on the internet platform," will sell its 80% interest in PC memory module manufacturer Kingston Technology to that company's founders in a deal valued at $450m.
The SunPCi card will feature a dedicated 300 MHz AMD K6-2 processor and 64 MB to 256 MB of PC memory to deliver the higher levels of performance needed to handle large documents, graphics and calculations in the PC environment.
While effective PC memory management is a desirable goal for a stand alone PC, it is absolute critical for PCs connected to a network.
Since PC I/O status is extracted from PC memory before any data reduction is performed, the PC function and program are uninhibited by the diagnostic analysis.
The company's products include PC memory upgrades, computer cases, power supply units, solid-state drives, PC speakers, gaming headsets, gaming keyboards, gaming mice, system monitoring and control devices, PC cooling products, wireless storage drives, and USB flash drives.
Strontium is Singapore's No.1 PC memory maker with revenue exceeding US$210 million in 2010.