DOS extender

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DOS extender

Software that is combined with a DOS application to allow it to run in extended memory (beyond 1MB). To gain access to extended memory, it runs the application in Protected Mode. When the application requests DOS services, the DOS extender either handles them itself or, with functions such as disk accesses, resets the machine to Real Mode, lets DOS service the request and then switches back into Protected Mode. Windows 3.0 included a DOS extender, and although it may seem ridiculous today, by breaking the 1MB limit, Windows solved a very thorny issue and became very popular. See VCPI and DPMI.

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No references found			We met recently with Terry colligan, president of Rational Systems, who gave us a briefing on his own DOS 16/M product and the DOS extender market in general. Stretching DOS by Soft-Letter SoftICE for Windows NT debugs all Win32 and Win16 applications and DLLs, all Windows NT boot and system device drivers, as well as all DOS programs, including DOS extender applications. NuMega ships SoftICE, the Advanced Windows Debugger, for Windows NT; ... by Business Wire Thomson has accomplished its lower pricing by replacing hard-copy documentation with on-line documentation and by removing certain royalty-bearing features of the high-end product, such as database bindings and a third-party DOS extender. Thomson Software Products announces full-featured Ada development ... by Business Wire			DOS Defrag DOS del DOS Deltree DOS device names DOS Dir DOS Dircmd DOS directories DOS directory rules DOS disk recovery DOS Diskcomp DOS Diskcopy DOS Dos DOS Doskey DOS DoubleSpace DOS Dozen DOS drive identification DOS DRIVER.SYS DOS Drivparm DOS duplicate file names DOS Editor DOS EMM386.EXE DOS environment DOS error messages DOS Exit DOS Expand DOS extender DOS extensions DOS external command DOS Fastopen DOS FC DOS FCB DOS file DOS file names DOS filters & pipes DOS Find DOS Format DOS hidden file DOS high memory DOS HIMEM.SYS DOS Interlink DOS internal command DOS Join DOS key commands DOS Label DOS laplink DOS Lastdrive DOS Loadfix DOS Loadhigh DOS Md DOS Mem DOS Memmaker			DOS directory rules DOS disk cache DOS disk recovery DOS Diskcomp DOS Diskcopy DOS Dos DOS Doskey DOS DoubleSpace DOS Dozen DOS drive identification DOS DRIVER.SYS DOS Drivparm DOS duplicate file names DOS Editor DOS Edlin DOS EMM386.EXE DOS Emulation DOS environment Dos Equis DOS Erase DOS error messages DOS executable DOS executable DOS Exit DOS Expand DOS Expand DOS Expand DOS Expand DOS extender DOS extensions DOS external command DOS Fastopen DOS FAT DOS FAT DOS FAT DOS FAT DOS FC DOS FCB DOS Fdisk DOS file DOS file names DOS file transfer DOS files= DOS filters & pipes DOS Find DOS Format DOS hidden file DOS high DOS high memory DOS HIMEM.SYS DOS history DOS Interlink DOS internal command DOS Join DOS key commands DOS Label

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