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VGA-Copy
VGA-Copy is an MS-DOS program to copy floppy disks. It is able to read defective floppy disks. Development VGA-Copy was created by the German software developer Thomas Mönkemeier. The main code was developed in Turbo Pascal; some low-level hardware parts were written in Turbo Assembler. VGA-Copy was originally released as shareware: A free test version was spread through bulletin board systems and shareware CDs; a license key file to turn the test version into a full version could be ordered for a payment. The shareware version had two limitations: it had a ten-second waiting time on startup and it was not able to write to individual boot sectors. Later the limitations changed to requiring to enter a 5-digit number on startup. The first public version of VGA-Copy was 2.0. Some earlier full versions were published by cdv Software Entertainment. Later versions were published under the names VGA-Copy Pro and VGA-Copy/386. VGA-Copy Pro 5.3 was the last version to work on an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HD-Copy
HDCopy is a disk image application for floppy disks that runs in MS-DOS. It can copy a floppy on the fly, or by using archives with IMG file extension that store the content of the disk with a proprietary file format (whose first three bytes noted in hexadecimal will be FF 18, and its size will be anything). For the proprietary file format compression can be used or deactivated. The compression algorithm is called "Byte-Run-2-Algorithm" by the author.hd-copy.dok - Manual shipped with HD-Copy It was written by Oliver Fromme and is distributed as cardware. Do not confuse the ''HD'' in its name with ''hard disk''. HD represents ''high density'' (floppy disks with capacity greater than 1.2 MB). In the early 90s, when floppy diskettes for PCs were widely used, HDCopy was extremely popular in many places. Its usage started to decline as floppy disks became less widely used. The last released version of HDCopy is 2.0a. There is also a version 3.0a developed later by a Chinese programme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Floppy Disk
A floppy disk or floppy diskette (casually referred to as a floppy, or a diskette) is an obsolescent type of disk storage composed of a thin and flexible disk of a magnetic storage medium in a square or nearly square plastic enclosure lined with a fabric that removes dust particles from the spinning disk. Floppy disks store digital data which can be read and written when the disk is inserted into a floppy disk drive (FDD) connected to or inside a computer or other device. The first floppy disks, invented and made by IBM, had a disk diameter of . Subsequently, the 5¼-inch and then the 3½-inch became a ubiquitous form of data storage and transfer into the first years of the 21st century. 3½-inch floppy disks can still be used with an external USB floppy disk drive. USB drives for 5¼-inch, 8-inch, and other-size floppy disks are rare to non-existent. Some individuals and organizations continue to use older equipment to read or transfer data from floppy disks. Floppy disk ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Utility Software
Utility software is software designed to help analyze, configure, optimize or maintain a computer. It is used to support the computer infrastructure - in contrast to application software, which is aimed at directly performing tasks that benefit ordinary users. However, utilities often form part of the application . For example, a batch job may run user-written code to update a database and may then include a step that runs a utility to back up the database, or a job may run a utility to compress a disk before copying files. Although a basic set of utility programs is usually distributed with an operating system (OS), and this first party utility software is often considered part of the operating system, users often install replacements or additional utilities. Those utilities may provide additional facilities to carry out tasks that are beyond the capabilities of the operating system. Many utilities that might affect the entire computer system require the user to have elevated pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Random-access Memory
Random-access memory (RAM; ) is a form of computer memory that can be read and changed in any order, typically used to store working data and machine code. A random-access memory device allows data items to be read or written in almost the same amount of time irrespective of the physical location of data inside the memory, in contrast with other direct-access data storage media (such as hard disks, CD-RWs, DVD-RWs and the older magnetic tapes and drum memory), where the time required to read and write data items varies significantly depending on their physical locations on the recording medium, due to mechanical limitations such as media rotation speeds and arm movement. RAM contains multiplexing and demultiplexing circuitry, to connect the data lines to the addressed storage for reading or writing the entry. Usually more than one bit of storage is accessed by the same address, and RAM devices often have multiple data lines and are said to be "8-bit" or "16-bit", etc. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
F-Prot
FRISK Software International (established in 1993) was an Icelandic software company that developed F-Prot antivirus and F-Prot AVES antivirus and anti-spam service. The company was founded in 1993. It was acquired by Cyren in 2012. History The company was founded in 1993. Its name is derived from the initial letters of the personal name and patronymic of ''Fri''ðrik ''Sk''úlason, its founder. Dr. Vesselin Vladimirov Bontchev, a computer expert from Bulgaria, best known for his research on the Dark Avenger virus, worked for the company as an anti-virus researcher. F-Prot Antivirus was first released in 1989, making it one of the longest lived anti-virus brands on the market. It was the world's first with a heuristic engine. It is sold in both home and corporate packages, of which there are editions for Windows and Linux. There are corporate versions for Microsoft Exchange, Solaris, and certain IBM eServers. The Linux version is available to home users free of charge, with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Distribution Media Format
Distribution Media Format (DMF) is a format for floppy disks that Microsoft used to distribute software. It allowed the disk to contain 1680 KB of data on a 3-inch disk, instead of the standard 1440 KB. As a side effect, utilities had to specially support the format in order to read and write the disks, which made copying of products distributed on this medium more difficult. An Apple Macintosh computer running Disk Copy 6.3.3 on the Mac OS 7.6 or later operating system can copy and make DMF disks. The first Microsoft software product that uses DMF for distribution were the "c" revisions of Office 4.x. It also was the first software product to use CAB files, then called "Diamond". Comparison of DMF and standard 1440 KB 3-inch diskettes: DMF in the form of a 1680 KB Virtual Floppy Disk (VFD) image and IBM Extended Density Format (XDF) images are supported by Windows Virtual PC. See also * 2M, a program that allows the formatting of high-capacity fl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2M (DOS)
2M is a DOS program by the Spanish programmer Ciriaco García de Celis. It enables higher than normal capacity formatting of floppy disks. It saw active development from 1993 to 1995. The last version, v3.0, was released on 6 March 1995. It was written in C and assembler and compiled using Borland C++ 3.1. The program consisted of two major components: 2M and 2MGUI (from "2M Guinness"). Of these, 2M was the main program enabling the formatting, reading and writing of high density 3.5" disks formatted to a capacity of either 1804 KiB or 1886 KB, and 2MGUI was a proof-of-concept program that demonstrated the ability to format any normal high density 3.5" disk to a capacity of over two million bytes (1972 KiB) on any disk drive. Both programs implemented disk I/O speedups in the form of "Sector Sliding" and "DiskBoost", which work on the principle of ordering the physical sectors on the disk to facilitate pauseless reading over track changes. 2MGUI utilized bit banging and tricked t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freeware
Freeware is software, most often proprietary, that is distributed at no monetary cost to the end user. There is no agreed-upon set of rights, license, or EULA that defines ''freeware'' unambiguously; every publisher defines its own rules for the freeware it offers. For instance, modification, redistribution by third parties, and reverse engineering are permitted by some publishers but prohibited by others. Unlike with free and open-source software, which are also often distributed free of charge, the source code for freeware is typically not made available. Freeware may be intended to benefit its producer by, for example, encouraging sales of a more capable version, as in the freemium and shareware business models. History The term ''freeware'' was coined in 1982 by Andrew Fluegelman, who wanted to sell PC-Talk, the communications application he had created, outside of commercial distribution channels. Fluegelman distributed the program via a process now termed '' sharewa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
I386
The Intel 386, originally released as 80386 and later renamed i386, is a 32-bit microprocessor introduced in 1985. The first versions had 275,000 transistorsmit.edu—The Future of FPGAs (Cornell) October 11, 2012 and were the CPU of many workstations and high-end s of the time. As the original implementation of the [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Micro Channel Architecture
Micro Channel architecture, or the Micro Channel bus, is a proprietary 16- or 32-bit parallel computer bus introduced by IBM in 1987 which was used on PS/2 and other computers until the mid-1990s. Its name is commonly abbreviated as "MCA", although not by IBM. In IBM products, it superseded the ISA bus and was itself subsequently superseded by the PCI bus architecture. Background The development of Micro Channel was driven by both technical and business pressures. Technology The IBM AT bus, which later became known as the Industry Standard Architecture (ISA) bus, had a number of technical design limitations, including: * A slow bus speed. * A limited number of interrupts, fixed in hardware. * A limited number of I/O device addresses, also fixed in hardware. * Hardwired and complex configuration with no conflict resolution. * Deep links to the architecture of the 80x86 chip familyUse of the ISA bus outside of machines employing the 80x86 CPU family was rare. Notable non- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IBM Personal Computer/AT
The IBM Personal Computer/AT (model 5170, abbreviated as IBM AT or PC/AT) was released in 1984 as the fourth model in the IBM Personal Computer line, following the IBM PC/XT and its IBM Portable PC variant. It was designed around the Intel 80286 microprocessor. Name IBM did not specify an expanded form of "AT" on the machine, press releases, brochures or documentation, but some sources expand the term as "Advanced Technology", including at least one internal IBM document. History IBM's 1984 introduction of the AT was seen as an unusual move for the company, which typically waited for competitors to release new products before producing its own models. At $4,000–6,000, it was only slightly more expensive than considerably slower IBM models. The announcement surprised rival executives, who admitted that matching IBM's prices would be difficult. No major competitor showed a comparable computer at COMDEX Las Vegas that year. Features The AT is IBM PC compatible, with the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shareware
Shareware is a type of proprietary software that is initially shared by the owner for trial use at little or no cost. Often the software has limited functionality or incomplete documentation until the user sends payment to the software developer. Shareware is often offered as a download from a website or on a compact disc included with a magazine. Shareware differs from freeware, which is fully-featured software distributed at no cost to the user but without source code being made available; and free software, free and open-source software, in which the source code is freely available for anyone to inspect and alter. There are many types of shareware and, while they may not require an initial up-front payment, many are intended to generate revenue in one way or another. Some limit use to personal non-commercial software, commercial purposes only, with purchase of a license required for use in a business enterprise. The software itself may be time-limited, or it may remind the use ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
