A CDE Definition
(HIGH MEMory) Memory beyond a certain location; the precise location dependent on the hardware platform. In the days of DOS, high memory began at one megabyte. In the Android smartphone, HIGHMEM starts at 256MB. See HIMEM.SYS.
An extended memory manager that has been included with DOS and Windows, starting with DOS 5 and Windows 3.0. It allows programs to cooperatively allocate extended memory in 286 and higher PCs. HIMEM.SYS is an XMS driver. Starting with Windows 95 and subsequent 32-bit versions of Windows, HIMEM.SYS was automatically loaded at startup. See XMS.
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