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Quarterdeck Expanded Memory Manager (QEMM) is a memory manager produced by Quarterdeck Office Systems in the late 1980s through the late 1990s. It was the most popular third-party memory manager for the MS-DOS and other DOS operating systems .
Quarterdeck Expanded Memory Manager, DESQview, DESQview/X Quarterdeck Office Systems , later Quarterdeck Corporation ( NASDAQ : QDEK), was an American computer software company. It was founded by Therese Myers [ 1 ] [ 2 ] and Gary Pope in 1981 [ 3 ] and incorporated in 1982.
The memory manager is easily controlled by the user with DOS program QEMM.COM. DESQview is able to use QEMM's features far beyond just the LIM EMS API, mapping most of the "conventional" address space (below 640 KB) into multiple extended memory blocks such that each can execute transparently during its context.
The first software expanded-memory management (emulation) program was CEMM, available in September 1986 as a utility for the Compaq Deskpro 386. A popular and well-featured commercial solution was Quarterdeck's QEMM. A contender was Qualitas' 386 MAX. Functionality was later incorporated into MS-DOS 4.01 in 1989 and into DR DOS 5.0 in 1990, as ...
Expanded memory managers such as Quarterdeck's QEMM product and Microsoft's EMM386 supported the expanded memory standard without requirement for special memory boards. On 386 and subsequent processors, memory managers like QEMM might move the bulk of the code for a driver or TSR into extended memory and replace it with a small fingerhold that ...
Developed since 1987 in cooperation with Quarterdeck Office Systems and with support by A.I. Architects, Lotus Development Corp., Quadram, Qualitas and Rational Systems, VCPI is provided by an expanded memory manager in DOS (e.g. CEMM, QEMM, later EMM386) and does allow 80386 protected-mode DOS extenders to coexist with 80386 EMS expanded memory emulators.
President-elect Trump took China by surprise when he invited President Xi Jinping to his upcoming inauguration, a friendly gesture ahead of a widely expected trade war.
Quarterdeck can refer to: Quarterdeck, part of a warship; Quarterdeck Office Systems. Quarterdeck Expanded Memory Manager; Quarterdeck Mosaic; Quarterdeck DESQview/X 2.0; Quarterdeck Cleansweep; Quarterdeck Investment Partners, Inc. Quarterdeck Ridge