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Didaktik
The Didaktik was a series of 8-bit home computers based on the clones of Intel 8080 and Zilog Z80 processors produced in former Czechoslovakia. Didaktik Alfa Didaktik Alfa was produced in 1986, as a "more professional" clone of PMD 85. It featured 2.048 MHz Intel 8080 CPU, 48 KB RAM, 8 KB ROM with built-in BASIC, good keyboard (compared with PMD 85), monitor video output (but no TV output) with 288×256 resolution and four possible colours. Despite some changes in ROM, it was mostly compatible with PMD 85. Didaktik Alfa 1 was a clone of PMD 85-1, Didaktik Alfa 2 of PMD 85-2. Didaktik Beta Didaktik Beta was a slightly improved version of previous Didaktik Alfa, having almost identical hardware. While Didaktik Alfa and Beta were mostly deployed in schools (to replace older PMD 85 computers), there was another production line, meant as home computers. These were Sinclair ZX Spectrum 48K clones. Didaktik Gama Didaktik Gama was the clone of the ZX Spectrum wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Didaktik M, ZX Spectrum Clone
The Didaktik was a series of 8-bit home computers based on the clones of Intel 8080 and Zilog Z80 central processing unit, processors produced in former Czechoslovakia. Didaktik Alfa Didaktik Alfa was produced in 1986, as a "more professional" clone of PMD 85. It featured 2.048 MHz Intel 8080 CPU, 48 kibibyte, KB random access memory, RAM, 8 KB ROM with built-in BASIC, good keyboard (compared with PMD 85), monitor video output (but no TV output) with 288×256 resolution and four possible colours. Despite some changes in ROM, it was mostly compatible with PMD 85. Didaktik Alfa 1 was a clone of PMD 85-1, Didaktik Alfa 2 of PMD 85-2. Didaktik Beta Didaktik Beta was a slightly improved version of previous Didaktik Alfa, having almost identical hardware. While Didaktik Alfa and Beta were mostly deployed in schools (to replace older PMD 85 computers), there was another production line, meant as home computers. These were Sinclair ZX Spectrum#ZX Spectrum 16/48K, ZX Spe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Didaktik Alfa
The Didaktik was a series of 8-bit home computers based on the clones of Intel 8080 and Zilog Z80 processors produced in former Czechoslovakia. Didaktik Alfa Didaktik Alfa was produced in 1986, as a "more professional" clone of PMD 85. It featured 2.048 MHz Intel 8080 CPU, 48 KB RAM, 8 KB ROM with built-in BASIC, good keyboard (compared with PMD 85), monitor video output (but no TV output) with 288×256 resolution and four possible colours. Despite some changes in ROM, it was mostly compatible with PMD 85. Didaktik Alfa 1 was a clone of PMD 85-1, Didaktik Alfa 2 of PMD 85-2. Didaktik Beta Didaktik Beta was a slightly improved version of previous Didaktik Alfa, having almost identical hardware. While Didaktik Alfa and Beta were mostly deployed in schools (to replace older PMD 85 computers), there was another production line, meant as home computers. These were Sinclair ZX Spectrum 48K clones. Didaktik Gama Didaktik Gama was the clone of the ZX Spectrum wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Didaktik Gama
The Didaktik was a series of 8-bit home computers based on the clones of Intel 8080 and Zilog Z80 processors produced in former Czechoslovakia. Didaktik Alfa Didaktik Alfa was produced in 1986, as a "more professional" clone of PMD 85. It featured 2.048 MHz Intel 8080 CPU, 48 KB RAM, 8 KB ROM with built-in BASIC, good keyboard (compared with PMD 85), monitor video output (but no TV output) with 288×256 resolution and four possible colours. Despite some changes in ROM, it was mostly compatible with PMD 85. Didaktik Alfa 1 was a clone of PMD 85-1, Didaktik Alfa 2 of PMD 85-2. Didaktik Beta Didaktik Beta was a slightly improved version of previous Didaktik Alfa, having almost identical hardware. While Didaktik Alfa and Beta were mostly deployed in schools (to replace older PMD 85 computers), there was another production line, meant as home computers. These were Sinclair ZX Spectrum 48K clones. Didaktik Gama Didaktik Gama was the clone of the ZX Spectrum wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Didaktik M
The Didaktik was a series of 8-bit home computers based on the clones of Intel 8080 and Zilog Z80 processors produced in former Czechoslovakia. Didaktik Alfa Didaktik Alfa was produced in 1986, as a "more professional" clone of PMD 85. It featured 2.048 MHz Intel 8080 CPU, 48 KB RAM, 8 KB ROM with built-in BASIC, good keyboard (compared with PMD 85), monitor video output (but no TV output) with 288×256 resolution and four possible colours. Despite some changes in ROM, it was mostly compatible with PMD 85. Didaktik Alfa 1 was a clone of PMD 85-1, Didaktik Alfa 2 of PMD 85-2. Didaktik Beta Didaktik Beta was a slightly improved version of previous Didaktik Alfa, having almost identical hardware. While Didaktik Alfa and Beta were mostly deployed in schools (to replace older PMD 85 computers), there was another production line, meant as home computers. These were Sinclair ZX Spectrum 48K clones. Didaktik Gama Didaktik Gama was the clone of the ZX Spectrum wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ZX Spectrum
The ZX Spectrum () is an 8-bit computing, 8-bit home computer that was developed by Sinclair Research. It was released in the United Kingdom on 23 April 1982, and became Britain's best-selling microcomputer. Referred to during development as the ''ZX81 Colour'' and ''ZX82'', it was launched as the ''ZX Spectrum'' to highlight the machine's colour display, which differed from the black and white display of its predecessor, the ZX81. The Spectrum was released as six different models, ranging from the entry level with 16 Kilobyte, KB RAM released in 1982 to the ZX Spectrum +3 with 128 KB RAM and built in floppy disk drive in 1987; altogether they sold over 5 million units worldwide (not counting List of ZX Spectrum clones, unofficial clones). The Spectrum was among the first home computers in the United Kingdom aimed at a mainstream audience, and it thus had similar significance to the Commodore 64 in the US and the Thomson MO5 in France. The introduction of the ZX Spect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PMD 85
The PMD 85 is an 8-bit personal computer produced since 1985 by the companies Tesla Piešťany and Tesla Bratislava in the former Czechoslovakia. They were deployed ''en masse'' in schools throughout Slovakia (while the IQ 151 performed a similar role in the Czech part of the country). The first Czechoslovak video games were created on the PMD 85 (other platforms were ZX Spectrum and Atari). The production was local due to a lack of foreign currencies for purchasing systems from the West.{{Citation needed, date=May 2007 After the Velvet Revolution in 1989, the production was stopped. The PMD 85 was not competitive in quality or features compared to foreign PCs available at that time. Specifications * MHB8080A 2.048 MHz CPU (clone of Intel 8080) * 48 KiB RAM (PMD 85-2A and 3, 64 KiB) * 4 KiB ROM (PMD 85-3, 8 KiB) * System monitor * Tape utilities * TV output ( B/W, PMD 85-3 PAL) or RGB component video * 288×256 resolution * 4-level attribute (flickering, graysca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computer Display
A computer monitor is an output device that displays information in pictorial or textual form. A discrete monitor comprises a visual display, support electronics, power supply, housing, electrical connectors, and external user controls. The display in modern monitors is typically an LCD with LED backlight, having by the 2010s replaced CCFL backlit LCDs. Before the mid- 2000s, most monitors used a CRT. Monitors are connected to the computer via DisplayPort, HDMI, USB-C, DVI, VGA, or other proprietary connectors and signals. Originally, computer monitors were used for data processing while television sets were used for video. From the 1980s onward, computers (and their monitors) have been used for both data processing and video, while televisions have implemented some computer functionality. In the 2000s, the typical display aspect ratio of both televisions and computer monitors has changed from 4:3 to 16:9. Modern computer monitors are mostly interchangeable with televisi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tuzex
Tuzex was a series of state-run shops in Czechoslovakia from 1957 to 1992 which did not accept normal Czechoslovak koruna currency but only vouchers which could be purchased from banks using foreign currency. They supplied luxury items: local goods in short supply and in particular foreign goods. The Tuzex vouchers were effectively an unofficial parallel currency. History The Czechoslovak koruna (crown) was a soft currency, that is, not exchangeable for other currencies outside the country. In 1948, shops were established under the name Darex to sell goods to foreigners for foreign (hard) currency only (based on the earlier Torgsin shops in the Soviet Union). Later, these became open to ordinary citizens, but not for crowns. In 1950, to speed up transactions and limit fraud, foreign currency was first converted into Darex vouchers in values of crowns. In 1957, the PZO (Foreign Trade Enterprise) Tuzex (a contraction of ''tuzemský export'' omestic export was founded in order ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computer Keyboard
A computer keyboard is a peripheral input device modeled after the typewriter keyboard which uses an arrangement of buttons or keys to act as mechanical levers or electronic switches. Replacing early punched cards and paper tape technology, interaction via teleprinter-style keyboards have been the main input method for computers since the 1970s, supplemented by the computer mouse since the 1980s. Keyboard keys (buttons) typically have a set of characters engraved or printed on them, and each press of a key typically corresponds to a single written symbol. However, producing some symbols may require pressing and holding several keys simultaneously or in sequence. While most keys produce characters (letters, numbers or symbols), other keys (such as the escape key) can prompt the computer to execute system commands. In a modern computer, the interpretation of key presses is generally left to the software: the information sent to the computer, the scan code, tells it only whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Television
Television, sometimes shortened to TV, is a telecommunication medium for transmitting moving images and sound. The term can refer to a television set, or the medium of television transmission. Television is a mass medium for advertising, entertainment, news, and sports. Television became available in crude experimental forms in the late 1920s, but only after several years of further development was the new technology marketed to consumers. After World War II, an improved form of black-and-white television broadcasting became popular in the United Kingdom and the United States, and television sets became commonplace in homes, businesses, and institutions. During the 1950s, television was the primary medium for influencing public opinion.Diggs-Brown, Barbara (2011''Strategic Public Relations: Audience Focused Practice''p. 48 In the mid-1960s, color broadcasting was introduced in the U.S. and most other developed countries. The availability of various types of archival st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Audio Cassette
The Compact Cassette or Musicassette (MC), also commonly called the tape cassette, cassette tape, audio cassette, or simply tape or cassette, is an analog magnetic tape recording format for audio recording and playback. Invented by Lou Ottens and his team at the Dutch company Philips in 1963, Compact Cassettes come in two forms, either already containing content as a prerecorded cassette (''Musicassette''), or as a fully recordable "blank" cassette. Both forms have two sides and are reversible by the user. Although other tape cassette formats have also existed - for example the Microcassette - the generic term ''cassette tape'' is normally always used to refer to the Compact Cassette because of its ubiquity. Its uses have ranged from portable audio to home recording to data storage for early microcomputers; the Compact Cassette technology was originally designed for dictation machines, but improvements in fidelity led to it supplanting the stereo 8-track cartridge and ree ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iron Curtain
The Iron Curtain was the political boundary dividing Europe into two separate areas from the end of World War II in 1945 until the end of the Cold War in 1991. The term symbolizes the efforts by the Soviet Union (USSR) to block itself and its satellite states from open contact with the West, its allies and neutral states. On the east side of the Iron Curtain were the countries that were connected to or influenced by the Soviet Union, while on the west side were the countries that were NATO members, or connected to or influenced by the United States; or nominally neutral. Separate international economic and military alliances were developed on each side of the Iron Curtain. It later became a term for the physical barrier of fences, walls, minefields, and watchtowers that divided the "east" and "west". The Berlin Wall was also part of this physical barrier. The nations to the east of the Iron Curtain were Poland, East Germany, Czechoslovakia, Hungary, Romania, Bulgaria, Albania, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
