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DOS4GW
DOS/4G is a 32-bit DOS extender developed by Rational Systems (later Tenberry Software). It allows DOS programs to eliminate the 640 kilobyte, KB conventional memory limit by addressing up to 64 megabyte, MB of extended memory on Intel 80386 and above machines. Features Functioning as a highly flexible and reusable memory extension library, DOS/4G allowed programmers to access extended memory without writing specialized code. It embeds itself in the executable file at Linker (computing), linking time and executes before main application code, so usually DOS/4G initialization messages show up at launch. It can in principle operate within MS-DOS, PC DOS, DR-DOS and other DOS clones, the DOS boxes of OS/2, Microsoft Windows, Windows NT and Windows 95, and DOS emulators such as DOSBox. However, in practice few DOS/4G games or other applications will run on non-DOS-based versions of Windows, including Windows NT, Windows 2000 and Windows XP, since none of these allow direct access ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DOS Extender
A DOS extender is a computer software program running under DOS that enables software to run in a protected mode environment even though the host operating system is only capable of operating in real mode. DOS extenders were initially developed in the 1980s following the introduction of the Intel 80286 processor (and later expanded upon with the Intel 80386), to cope with the memory limitations of DOS. DOS extender operation A DOS extender is a program that "extends" DOS so that programs running in protected mode can transparently interface with the underlying DOS API. This was necessary because many of the functions provided by DOS require 16-bit segment and offset addresses pointing to memory locations within the Conventional memory, first 640 kilobytes of memory. Protected mode, however, uses an incompatible addressing method where the segment registers (now called selectors) are used to point to an entry in the Global Descriptor Table which describes the characteristics of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tenberry Software
Tenberry Software (previously Rational Systems) was a software company notable for the development of DOS/16M and DOS/4G, which were the first industry standard DOS extenders. See also * Phar Lap Phar Lap (4 October 1926 – 5 April 1932) was a New Zealand-born champion Australian Thoroughbred horse racing, racehorse. Achieving great success during his distinguished career, his initial underdog status gave people hope during the ear ... - competitor References External links Tenberry Software Defunct software companies of the United States Companies based in Phoenix, Arizona {{US-software-company-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Windows NT
Windows NT is a Proprietary software, proprietary Graphical user interface, graphical operating system produced by Microsoft as part of its Windows product line, the first version of which, Windows NT 3.1, was released on July 27, 1993. Originally made for the workstation, office, and Server (computing), server markets, the Windows NT line was made available to consumers with the release of Windows XP in 2001. The underlying technology of Windows NT continues to exist to this day with incremental changes and improvements, with the latest version of Windows based on Windows NT being Windows Server 2025 announced in 2024. The name "Windows NT" originally denoted the major technological advancements that it had introduced to the Windows product line, including eliminating the 16-bit computing, 16-bit memory access limitations of earlier Windows releases such as Windows 3.1 and the Windows 9x series. Each Windows release built on this technology is considered to be based on, if not a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DOS Protected Mode Interface
In computing, the DOS Protected Mode Interface (DPMI) is a specification introduced in 1989 which allows a DOS program to run in protected mode, giving access to many features of the new PC processors of the time not available in real mode. It was initially developed by Microsoft for Windows 3.0, although Microsoft later turned control of the specification over to an industry committee with open membership. Almost all modern DOS extenders are based on DPMI and allow DOS programs to address all memory available in the PC and to run in protected mode (mostly in ring (computer security), ring 3, least privileged). Overview DPMI stands for DOS Protected Mode Interface. It is an API that allows a program to run in protected mode on 80286 series and later processors, and do the calls to real mode without having to set up these CPU modes manually. DPMI also provides the functions for managing various resources, notably Computer Memory, memory. This allows the DPMI-enabled programs to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DOS/32
DOS/32 is an advanced 32-bit DOS extender created for replacing DOS/4GW extender and compatibles. This extender can be used in various environments, from embedded systems to DOS emulators, by both developers and end users alike. Unlike DOS/4GW, DOS/32 is free, open-source and can be extended to create a unique executable file that incorporates the extender memory tool and main application code. Compatibility DOS/32 is compatible with MS-DOS 5.00 through 7.10, Windows 3.x, 95, 98 and Me, NT 3.51 and 4.0 (Service Pack 3 or later), 2000, XP and IBM OS/2 as well as OpenDOS and DOSEMU. DOS/32 has been tested and proved to be fully compatible with software which use DOS/4G, DOS/4GW, DOS/4GW Professional, PMODE/W and CauseWay DOS Extenders. Features The DOS Extender includes a built-in Advanced DOS Protected Mode Interface server supporting v0.9 of the DPMI specification and comes with a set of tools needed to create 32-bit protected mode applications. Like DOS/4G, it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ISA Bus
Isa or ISA may refer to: Places * Isa, Amur Oblast, Russia * Isa, Kagoshima, Japan * Isa, Nigeria * Isa District, Kagoshima, former district in Japan * Isa Town, middle class town located in Bahrain * Mount Isa, Queensland, Australia * Mount Isa Airport, IATA airport code "ISA" * Isa (river), a river in Belarus People * Īsā, the name of Jesus in Islam * Isa (name), an Arabic name corresponding to Jesus in English * Isa, stage name of Lee Chae-young, member of K-Pop group STAYC * Isa, female given name, short for Isabel or similar names beginning with Isa- such as Isadora * Isa Maud Ilsen (1868–1937), Canadian-American music therapist, nurse, lecturer * Isa Tengblad (born 1998), Swedish singer using the mononym Isa * Juan Isa (1913–1993), president of the International Baseball Federation (FIBA) from 1969 to 1975 Arts, entertainment, and media Fictional entities * ISA (''Days of Our Lives''), spy agency in TV series * Isa the iguana, in TV series '' Dora the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DMA Channel
Direct memory access (DMA) is a feature of computer systems that allows certain hardware subsystems to access main system memory independently of the central processing unit (CPU). Without DMA, when the CPU is using programmed input/output, it is typically fully occupied for the entire duration of the read or write operation, and is thus unavailable to perform other work. With DMA, the CPU first initiates the transfer, then it does other operations while the transfer is in progress, and it finally receives an interrupt from the DMA controller (DMAC) when the operation is done. This feature is useful at any time that the CPU cannot keep up with the rate of data transfer, or when the CPU needs to perform work while waiting for a relatively slow I/O data transfer. Many hardware systems use DMA, including disk drive controllers, graphics cards, network cards and sound cards. DMA is also used for intra-chip data transfer in some multi-core processors. Computers that have DMA channel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tomb Raider (1996 Video Game)
''Tomb Raider'' is a 1996 action-adventure video game developed by Core Design and published by Eidos Interactive as the debut entry in the ''Tomb Raider'' media franchise. It was first released on the Sega Saturn, followed shortly by versions for MS-DOS and the PlayStation. Later releases came for Mac OS (1999), Pocket PC (2002), N-Gage (2003), iOS (2013) and Android (2015). The game follows archaeologist-adventurer Lara Croft, who is hired by businesswoman Jacqueline Natla to find an artefact called the Scion of Atlantis. Gameplay features Lara navigating levels split into multiple areas and room complexes while fighting enemies and solving puzzles to progress. An expansion pack subtitled ''Unfinished Business'' was released in 1997, containing new standalone levels. The initial concept was created by Toby Gard, who is credited as Lara's creator and worked as lead artist on the project. Production began in 1994 and took 18 months, with a budget of £440,000. The char ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doom (1993 Video Game)
''Doom'' is a 1993 first-person shooter, first-person shooter game developed and published by id Software for MS-DOS. It is the first installment in the Doom (franchise), ''Doom'' franchise. The player player character, assumes the role of a space marine, later unofficially referred to as Doomguy, fighting through hordes of undead humans and invading demons. The game begins on the moons of Mars and finishes in hell, with the player traversing each level to find its exit or defeat its Final boss (video games), final boss. It is an early example of 3D computer graphics, 3D graphics in video games, and has enemies and objects as 2D images, a technique sometimes referred to as 2.5D graphics. ''Doom'' was the third major independent release by id Software, after ''Commander Keen'' (1990–1991) and ''Wolfenstein 3D'' (1992). In May 1992, id started developing a darker game focused on fighting demons with technology, using a new 3D game engine from the lead programmer, John Carmack. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Watcom C Compiler
Watcom C/C++ (currently Open Watcom C/C++) is an integrated development environment (IDE) product from Watcom International Corporation for the C, C++, and Fortran programming languages. Watcom C/C++ was a commercial product until it was discontinued, then released under the Sybase Open Watcom Public License as Open Watcom C/C++. It features tools for developing and debugging code for DOS, OS/2, Windows, and Linux operating systems, which are based upon 16-bit x86, 32-bit IA-32, or 64-bit x86-64 compatible processors. History In 2000, Sybase, who owned Watcom International Corporation halted the commercial sale of the Watcom C/C++ and Fortran compilers. In 2003, SciTech Software Inc, a customer of Sybase, negotiated wth Sybase, to have the code for the compilers released as an open source project under a new name, Open Watcom. The Watcom C/C++ compiler and the Watcom Fortran compiler were made available free of charge as the ''Open Watcom'' package. The last stable versi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Windows XP
Windows XP is a major release of Microsoft's Windows NT operating system. It was released to manufacturing on August 24, 2001, and later to retail on October 25, 2001. It is a direct successor to Windows 2000 for high-end and business users and Windows Me for home users. Development of Windows XP began in the late 1990s under the codename "Windows Neptune, Neptune", built on the Architecture of Windows NT#Kernel, Windows NT kernel and explicitly intended for mainstream consumer use. An updated version of Windows 2000 was also initially planned for the business market. However, in January 2000, both projects were scrapped in favor of a single OS codenamed "Whistler", which would serve as a single platform for both consumer and business markets. As a result, Windows XP is the first consumer edition of Windows not based on the Windows 95 kernel or MS-DOS. Upon its release, Windows XP received critical acclaim, noting increased performance and stability (especially compared to Wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
