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LZ Color 64
The Color 64 was an 8-bit home computer produced in Brazil by the Rio de Janeiro company ''Novo Tempo / LZ Equipamentos'' between 1983 and 1986. It was one of the many machines based on the TRS-80 Color Computer introduced during the Brazilian " Market Reserve", like the Codimex CD-6809 or Prológica CP 400 COLOR. History Launched in mid-1983, the Color 64 was the second Brazilian TRS-80 Color Computer clone. The production line was installed in the old premises of ''Cervejaria Skol'' in Rio de Janeiro. Due to its graphic and sound capabilities, ''Novo Tempo/LZ'' developed the "Computational Resources Switch" ("Comutador de Recursos Computacionais"), a piece of hardware designed for the educational market, allowing the creation of a small computer network. With it, a teacher could control ten other Color 64s, sharing programs and a printer. Despite being one of the first TRS-80 Color clones in Brazil, its success was limited to the Rio de Janeiro state, due to limited mar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Motorola 6809
The Motorola 6809 ("''sixty-eight-oh-nine''") is an 8-bit microprocessor with some 16-bit features. It was designed by Motorola's Terry Ritter and Joel Boney and introduced in 1978. Although source compatible with the earlier Motorola 6800, the 6809 offered significant improvements over it and 8-bit contemporaries like the MOS Technology 6502, including a hardware multiplication instruction, 16-bit arithmetic, system and user stack registers allowing re-entrant code, improved interrupts, position-independent code, and an orthogonal instruction set architecture with a comprehensive set of addressing modes. The 6809 was among the most powerful 8-bit processors of its era. It was also among the most expensive; in 1981 single-unit quantities were compared to for a Zilog Z80 and for a 6502. It was launched when a new generation of 16-bit processors were coming to market, like the Intel 8086, and 32-bit designs were on the horizon, including Motorola's own 68000. It was not feature ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rio De Janeiro (state)
Rio de Janeiro () is one of the States of Brazil, 27 federative units of Brazil. It has the second largest economy of Brazil, with the largest being that of the state of São Paulo (state), São Paulo. The state, which has 8.2% of the Brazilian population, is responsible for 9.2% of the Brazilian Gross domestic product, GDP. The state of Rio de Janeiro is located within the Brazilian geopolitical region classified as the Southeast Region, Brazil, Southeast (assigned by Brazilian Institute of Geography and Statistics, IBGE). Rio de Janeiro shares borders with all the other states in the same Southeast macroregion: Minas Gerais (North, N and Ordinal directions, NW), Espírito Santo (Ordinal direction, NE) and São Paulo (state), São Paulo (Ordinal directions, SW). It is bounded on the east and south by the South Atlantic Ocean. Rio de Janeiro has an area of . Its capital is the city of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, which was the capital of the Portuguese Colonial ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Goods Manufactured In Brazil
In economics, goods are anything that is good, usually in the sense that it provides welfare or utility to someone. Alan V. Deardorff, 2006. ''Terms Of Trade: Glossary of International Economics'', World Scientific. Online version: Deardorffs' Glossary of International Economics"good" an Goods can be contrasted with bads, i.e. things that provide negative value for users, like chores or waste. A bad lowers a consumer's overall welfare. Economics focuses on the study of economic goods, i.e. goods that are scarce; in other words, producing the good requires expending effort or resources. Economic goods contrast with free goods such as air, for which there is an unlimited supply.Samuelson, P. Anthony., Samuelson, W. (1980). Economics. 11th ed. / New York: McGraw-Hill. Goods are the result of the Secondary sector of the economy which involves the transformation of raw materials or intermediate goods into goods. Utility and characteristics of goods The change in utility (pleasure ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baud
In telecommunications and electronics, baud (; symbol: Bd) is a common unit of measurement of symbol rate, which is one of the components that determine the speed of communication over a data channel. It is the unit for symbol rate or modulation rate in symbols per second or pulses per second. It is the number of distinct symbol changes (signalling events) made to the transmission medium per second in a digitally modulated signal or a bd rate line code. Baud is related to '' gross bit rate'', which can be expressed in bits per second (bit/s). If there are precisely two symbols in the system (typically 0 and 1), then baud and bits per second are equivalent. Naming The baud unit is named after Émile Baudot, the inventor of the Baudot code for telegraphy, and is represented according to the rules for SI units. That is, the first letter of its symbol is uppercase (Bd), but when the unit is spelled out, it should be written in lowercase (baud) except when it begins a sentence ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RS-232
In telecommunications, RS-232 or Recommended Standard 232 is a standard introduced in 1960 for serial communication transmission of data. It formally defines signals connecting between a ''DTE'' (''data terminal equipment'') such as a computer terminal or PC, and a ''DCE'' ('' data circuit-terminating equipment'' or '' data communication equipment''), such as a modem. The standard defines the electrical characteristics and timing of signals, the meaning of signals, and the physical size and pinout of connectors. The current version of the standard is ''TIA-232-F Interface Between Data Terminal Equipment and Data Circuit-Terminating Equipment Employing Serial Binary Data Interchange'', issued in 1997. The RS-232 standard had been commonly used with serial ports and serial cables. It is still widely used in industrial communication devices. A serial port complying with the RS-232 standard was once a standard feature of many types of computers. Personal computers used them ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Motorola 6845
The Motorola 6845, or MC6845, is a display controller that was widely used in 8-bit computers during the 1980s. Originally intended for designs based on the Motorola 6800 CPU and given a related part number, it was more widely used alongside various other processors, and was most commonly found in machines based on the Zilog Z80 and MOS 6502. The 6845 is not an entire display solution on its own; the chip's main function is to properly time access to the display memory, and to calculate the memory address of the next portion to be drawn. Other circuitry in the machine then uses the address provided by the 6845 to fetch the pattern and then draw it. The implementation of that hardware is entirely up to the designer and varied widely among machines. The 6845 is intended for character displays, but could also be used for pixel-based graphics, with some clever programming. Among its better-known uses are the BBC Micro, Amstrad CPC, and Videx VideoTerm display cards for the Apple ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Random-access Memory
Random-access memory (RAM; ) is a form of Computer memory, electronic computer memory that can be read and changed in any order, typically used to store working Data (computing), data and machine code. A random-access memory device allows data items to be read (computer), 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 and Magnetic tape data storage, magnetic tape), 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. In today's technology, random-access memory takes the form of integrated circuit (IC) chips with MOSFET, MOS (metal–oxide–semiconductor) Memory cell (computing), memory cells. RAM is normally associated with Volatile memory, volatile types of memory where s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extended Color BASIC
Extended Color Basic is an update to the Color BASIC interpreter for the Radio Shack/Tandy TRS-80 Color Computer series, and is the default Basic interpreter for the Color Computer 2. The Color Computer Basic implementations are somewhat different for the versions of Basic which come with the other family of TRS-80 machines, namely Basic Levels I, II, and III. Assemblers and Pascal and C programming language compilers are available for the different machines in the series. Modified subsets of Color Basic may be found on many of the Radio Shack PC series of pocket computers (PC-1 to PC-4 by Sharp, PC-5, PC-6 to PC-8 by Casio is a Japanese multinational electronics manufacturing corporation headquartered in Shibuya, Tokyo, Japan. Its products include calculators, mobile phones, digital cameras, electronic musical instruments, and analogue and digital watches. It ...) of the era. Color Basic was updated again for the Color Computer 3 and some sources refer to it as Enhanc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Color BASIC
Color BASIC is the implementation of Microsoft BASIC that is included in the ROM of the Tandy/Radio Shack TRS-80 Color Computers manufactured between 1980 and 1991. BASIC (Beginner's All-purpose Symbolic Instruction Code) is a high level language with simple syntax that makes it easy to write simple programs. Color BASIC is interpreted, that is, decoded as it is run. Background The nucleus of Color BASIC was Microsoft BASIC-69 which Tandy licensed from Microsoft. Color BASIC 1.0 was released with the original 4k TRS-80 Color Computer in 1980. It resides on 8k bytes of ROM, and is responsible for all 'housekeeping' duties on the system. This includes hardware initialization, memory management, interrupt processing, etc. Like most implementations of BASIC, each line of code starts with a line number and consists of one or more statements with variables and operators. 16k of memory is required for the next level of BASIC, Extended Color BASIC ("ECB"). Extended BASIC is required fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Read-only Memory
Read-only memory (ROM) is a type of non-volatile memory used in computers and other electronic devices. Data stored in ROM cannot be electronically modified after the manufacture of the memory device. Read-only memory is useful for storing software that is rarely changed during the life of the system, also known as firmware. Software applications, such as video games, for programmable devices can be distributed as ROM cartridge, plug-in cartridges containing ROM. Strictly speaking, ''read-only memory'' refers to hard-wired memory, such as diode matrix or a #Solid-state ROM, mask ROM integrated circuit (IC), that cannot be electronically changed after manufacture. Although discrete circuits can be altered in principle, through the addition of Jump wire, bodge wires and the removal or replacement of components, ICs cannot. Correction of errors, or updates to the software, require new devices to be manufactured and to replace the installed device. Floating-gate ROM semiconductor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brazilian Cruzeiro (1967–1986)
The cruzeiro, initially denominated cruzeiro novo (), was the currency of Brazil between 1967 and 1986. It is the second of the 3 historical Brazilian currencies called "''cruzeiro''". It was introduced as ''cruzeiro novo'', with symbol NCr$, and remained with that denomination between 1967 and 1970 in the transition from the previous standard banknotes issued by American Bank Note Company and Thomas de la Rue to the new banknotes and coins issued mainly by Casa da Moeda do Brasil. It was introduced due to inflation and financial instability in the country, and had a conversion rate of 1 ''cruzeiro novo'' = 1000 Brazilian cruzeiro (1942–1967), "old" cruzeiros. After the transition period for the Casa da Moeda do Brasil to be able to manufacture the new banknotes, the currency was renamed simply ''cruzeiro'', with symbol Cr$. The ''cruzeiro'' remained as the official currency until 1986, when the it was replaced by the ''Brazilian cruzado, cruzado'', at a rate of 1 ''cruzado ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
