What is a conventional memory?
Random access memory (RAM) was used quite differently on IBM® PC and clones in the old days when DOS decided the command line operating system used before Windows®. The first 0-640 kilobytes (KB) RAM was marked as conventional memory; The area where DOS conventionally loaded when introducing. Block 640 kb - 1 megabyt (MB) consisting of 384 kB was the upper memory area (UMA); The first 64 KB across the 1 MB has become a high memory area (HMA or Himm) and everything was marked as augmented memory. Conventional memory
has been used as a read/write area for the operating system and for programs, which made it fixed. DOS also loaded routines, system controls and system parameters. To help relax the room, some residents of conventional memory were moved on the RAM ladder to UMA and HMA. This was achieved by adding a few lines to the config.sys file, a file that together with AutoExec.bat has determined large degrparameters to load SOF memoryTwar and hardware devices used in DOS and Early Windows® systems. At the end of the 80s of the 20th century, the Quarterdeck Expanded Memory Manager® (Qemm) automated a large part of the optimization that computer users required at that time who could not do it manually.
Until 1990, DR DOS version 5.0 Digital Research® introduced a better strategy to make the most of conventional memory, including its built -in extended memory: EMM386.EXE. This version of the DOS has almost completely loaded into a high memory and released conventional memory for programs that could only be launched there. Another advantage of this operating system is that it could buy it by the public (starting with version 3.1), while MS DOS was only available with hardware.
Microsoft® responded to Digital Research® with its own release 5.0 in 1991, which faced your Dr. DOS 5.0. The competition continued with dr. DOS 6.0 that includesl The switching of tasks and compression of the disk and MS DOS 6.0 followed in the kind. MS DOS 6.22 was the last independently available package of MS DOS on the market while Dr. DOS continues to be sold via Drdos.com.
As advanced Windows® operating systems, limiting conventional memory has become remote memory, except for those who continued to use DOS programs, either from necessity or for fun. Starting from the Windows® 95, the MS DOS version has been integrated for the purpose of implementing or removing problems. Windows® XP retains the skeletal version of MS DOS 80, accessible only by creating a floppy boot disk, as well as Vista®. All versions of Windows® retain the shell or command line interface. In the earlier versions of Windows® This was Command.exe that became CMD.exe in the Windows-NT® family.
Since September 2006, a free version with open source of DOS has also become available, known as Freedos, although it has never been developed for version 1.0. For those who use older Str todayOje or launching DOS programs, there is a lot of information online to manually optimize conventional memory to make the most of your programs or DOS games.