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Meritum BASIC Screenshot
Mera–Elzab Meritum – a family of Polish personal computers based on TRS-80 Model I with BASIC Level II. Manufactured in the 1980s by ''Mera–Elzab'' in cooperation with ''ITM'' company. History In the late 1970s and early 1980s, there was no small microcomputer available for the general public in Poland. The Polish computer industry was manufacturing only mainframe systems but not small computers for personal use. In the 1980s, Mera–Elzab was in the group of 500 largest Polish industrial enterprises and 100 largest exporters. It produced terminals, monitors, and computers, but did not manufacture products for the mass consumer market. ITM was a small foreign company operating in Poland selling measuring systems. In Poland under the rule of the communists, all companies (including Mera–Elzab) were state-owned. One exception was the companies owned by foreigners, often Polish emigrants. Design of the Meritum began in 1982. It was a time of major economic crisis and marti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ZX81
The ZX81 is a home computer that was produced by Sinclair Research and manufactured in Dundee, Scotland, by Timex Corporation. It was launched in the United Kingdom in March 1981 as the successor to Sinclair's ZX80 and designed to be a low-cost introduction to home computing for the general public. It was hugely successful; more than 1.5 million units were sold. In the United States it was initially sold as the ZX-81 under licence by Timex. Timex later produced its own versions of the ZX81: the Timex Sinclair 1000 and Timex Sinclair 1500. Unauthorized ZX81 clones were produced in several countries. The ZX81 was designed to be small, simple, and above all, inexpensive, with as few components as possible. Video output is to a television set rather than a dedicated monitor. Programs and data are loaded and saved onto compact audio cassettes. It uses only four silicon chips and a mere 1 KB of memory. It has no power switch or moving parts, with the exception of a VHF ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CP/M
CP/M, originally standing for Control Program/Monitor and later Control Program for Microcomputers, is a mass-market operating system created in 1974 for Intel 8080/ 85-based microcomputers by Gary Kildall of Digital Research, Inc. Initially confined to single-tasking on 8-bit processors and no more than 64 kilobytes of memory, later versions of CP/M added multi-user variations and were migrated to 16-bit processors. The combination of CP/M and S-100 bus computers became an early standard in the microcomputer industry. This computer platform was widely used in business through the late 1970s and into the mid-1980s. CP/M increased the market size for both hardware and software by greatly reducing the amount of programming required to install an application on a new manufacturer's computer. An important driver of software innovation was the advent of (comparatively) low-cost microcomputers running CP/M, as independent programmers and hackers bought them and shared their crea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meritum II Komplet
Mera–Elzab Meritum – a family of Polish personal computers based on TRS-80 Model I with BASIC Level II. Manufactured in the 1980s by ''Mera–Elzab'' in cooperation with ''ITM'' company. History In the late 1970s and early 1980s, there was no small microcomputer available for the general public in Poland. The Polish computer industry was manufacturing only mainframe systems but not small computers for personal use. In the 1980s, Mera–Elzab was in the group of 500 largest Polish industrial enterprises and 100 largest exporters. It produced terminals, monitors, and computers, but did not manufacture products for the mass consumer market. ITM was a small foreign company operating in Poland selling measuring systems. In Poland under the rule of the communists, all companies (including Mera–Elzab) were state-owned. One exception was the companies owned by foreigners, often Polish emigrants. Design of the Meritum began in 1982. It was a time of major economic crisis and marti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intel 8253
The Intel 8253 and 8254 are programmable interval timers (PITs), which perform timing and counting functions using three 16-bit counters. The 825x family was primarily designed for the Intel 8080/ 8085-processors, but were later used in x86 compatible systems. The 825x chips, or an equivalent circuit embedded in a larger chip, are found in all IBM PC compatibles and Soviet computers like the Vector-06C. In PC compatibles, Timer Channel 0 is assigned to IRQ-0 (the highest priority hardware interrupt). Timer Channel 1 is assigned to DRAM refresh (at least in early models before the 80386). Timer Channel 2 is assigned to the PC speaker. The Intel 82c54 (c for CMOS logic) variant handles up to 10 MHz clock signals. History The 8253 is described in the 1980 Intel "Component Data Catalog" publication. The 8254, described as a superset of the 8253 with higher clock speed ratings, has a "preliminary" data sheet in the 1982 Intel "Component Data Catalog". The 8254 is impleme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intel 8251
The 8251 is a Universal Synchronous/Asynchronous Receiver/Transmitter (USART) packaged in a 28-pin DIP made by Intel. It is typically used for serial communication and was rated for per second signalling rate. It is commonly confused with the much more common 8250 UART that was made popular as the serial port in the IBM Personal Computer The IBM Personal Computer (model 5150, commonly known as the IBM PC) is the first microcomputer released in the IBM PC model line and the basis for the IBM PC compatible de facto standard. Released on August 12, 1981, it was created by a team .... It includes 5 sections: # read/write control logic # transmitter # receiver # data bus system # modem control Variants Known uses The Intel 8251A was used in the Intel SDK-86 MCS-86 System Design Kit and the DEC LA120 printing terminal. The device is also used in the IC-10 RS-232 interface for Kenwood HAM radios like TS-440S, TS-711, TS-811 and many others. External links and refer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intel 8255
The Intel 8255 (or i8255) Programmable Peripheral Interface (PPI) chip was developed and manufactured by Intel in the first half of the 1970s for the Intel 8080 microprocessor. The 8255 provides 24 parallel input/output lines with a variety of programmable operating modes. The 8255 is a member of the MCS-85 Family of chips, designed by Intel for use with their 8085 and 8086 microprocessors and their descendants. It was first available in a 40-pin DIP and later a 44-pin PLCC packages. It found wide applicability in digital processing systems and was later cloned by other manufacturers. The 82C55 is a CMOS version for higher speed and lower current consumption. The functionality of the 8255 is now mostly embedded in larger VLSI processing chips as a sub-function. A CMOS version of the 8255 is still being made by Renesas but mostly used to expand the I/O of microcontrollers. Similar chips The 8255 has a similar function to the Motorola 6820 PIA (Peripheral Interface Adapter) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meritum BASIC Screenshot
Mera–Elzab Meritum – a family of Polish personal computers based on TRS-80 Model I with BASIC Level II. Manufactured in the 1980s by ''Mera–Elzab'' in cooperation with ''ITM'' company. History In the late 1970s and early 1980s, there was no small microcomputer available for the general public in Poland. The Polish computer industry was manufacturing only mainframe systems but not small computers for personal use. In the 1980s, Mera–Elzab was in the group of 500 largest Polish industrial enterprises and 100 largest exporters. It produced terminals, monitors, and computers, but did not manufacture products for the mass consumer market. ITM was a small foreign company operating in Poland selling measuring systems. In Poland under the rule of the communists, all companies (including Mera–Elzab) were state-owned. One exception was the companies owned by foreigners, often Polish emigrants. Design of the Meritum began in 1982. It was a time of major economic crisis and marti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Commodore 64
The Commodore 64, also known as the C64, is an 8-bit home computer introduced in January 1982 by Commodore International (first shown at the Consumer Electronics Show, January 7–10, 1982, in Las Vegas). It has been listed in the Guinness World Records as the highest-selling single computer model of all time, with independent estimates placing the number sold between 12.5 and 17 million units. Volume production started in early 1982, marketing in August for . Preceded by the VIC-20 and Commodore PET, the C64 took its name from its of RAM. With support for multicolor sprites and a custom chip for waveform generation, the C64 could create superior visuals and audio compared to systems without such custom hardware. The C64 dominated the low-end computer market (except in the UK and Japan, lasting only about six months in Japan) for most of the later years of the 1980s. For a substantial period (1983–1986), the C64 had between 30% and 40% share of the US market and two mil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atari 8-bit Family
The Atari 8-bit family is a series of 8-bit home computers introduced by Atari, Inc. in 1979 as the Atari 400 and Atari 800. The series was successively upgraded to Atari 1200XL , Atari 600XL, Atari 800XL, Atari 65XE, Atari 130XE, Atari 800XE, and Atari XEGS, the last discontinued in 1992. They differ primarily in packaging, each based on the MOS Technology 6502 central processing unit, CPU at and the same custom coprocessor chips. As the first home computer architecture with coprocessors, it has graphics and sound more advanced than most contemporary machines. Video games were a major draw, and first-person space combat simulator ''Star Raiders'' is considered the platform's killer app. The plug-and-play peripherals use the Atari SIO serial bus, with one developer eventually also co-patenting USB. While using the same internal technology, the Atari 800 was sold as a high-end model, while the 400 was more affordable. The 400 has a pressure-sensitive, spillproof membrane keyboar ... [...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] |
Poznań International Fair
The Poznań International Fair (PIF, pl, Międzynarodowe Targi Poznańskie, MTP) is the biggest industrial fair in Poland. It is held on the Poznań fairground in Poland. Poznań International Fair is located in the centre of the city opposite the main railway station – Poznań Główny, in the centre of Poland and in the centre of Europe. Typically, there are about 13,200 exhibitors including about 3,000 foreign companies from 70 countries of the world participating in 80 trade fair events organized on the grounds of the Poznań fair. The Poznań-based fair owns the largest exhibition and conference infrastructure in Poland, including 16 high standard air-conditioned halls with a large exhibition area (over in exhibition halls and almost on open grounds) and 81 modern conference rooms. History The idea of organising a modern fair by Polish manufacturers and merchants had its origins during the congress of the Union of Merchant Associations held in Poznań in 1917. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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