Computerul își câștigă propriul venit acasă

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Early microcomputers such as the Altair had front-mounted switches and diagnostic lights nicknamed " blinkenlights " to control and indicate internal system status, and were often sold in kit form to hobbyists. These kits would contain an empty printed atașareaîn Internet board which the buyer would fill with the integrated circuitsother individual electronic components, wires and connectors, and then hand- solder all the connections.

They were enclosed in plastic or metal cases similar in appearance to typewriter or hi-fi equipment enclosures, which were more familiar and attractive to consumers than the industrial metal card-cage enclosures used by the Altair and similar computers. The keyboard - a feature lacking on the Altair - was usually built into the same case as the motherboard.

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Ports for plug-in peripheral devices such as a video display, cassette tape recorders, joysticksand later disk drives were either built-in or available on expansion cards. Although the Apple II series had internal expansion slots, most other home computer models' expansion arrangements were through externally accessible 'expansion ports' that also served as a place to plug in cartridge-based games.

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Usually the manufacturer would sell peripheral devices designed to be compatible with their computers as extra cost accessories. Peripherals and software were not often interchangeable between different brands of home computer, or even between successive models of the same brand. To save the cost of a dedicated monitor, the home computer would often connect through an RF modulator to the family TV set, which served as both video display and sound system.

Large numbers of new machines of all types began to appear during the late s and early s.

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MattelColecoTexas Instruments and Timexnone of which had any prior connection to the computer industry, all had short-lived computerul își câștigă propriul venit acasă computer lines in the early s. Almost universally, home computers had a BASIC interpreter combined with a line editor in permanent read-only memory which one could use to type in BASIC programs and execute them immediately or save them to tape or disk.

In direct modethe BASIC interpreter was also used as the user interfaceand given tasks such as loading, saving, managing, and running files. A built-in programming language was seen as a requirement for any computer of the era, and was the main feature setting home computers apart from video game consoles. Still, home computers competed in the same market as the consoles. A home computer was often seen as simply as a higher end purchase than a console, adding abilities and productivity potential to what would still be mainly a gaming device.

A common marketing tactic was to show a computer system and console playing games side by side, then emphasizing the computer's greater ability by showing it running user-created programs, education software, word processing, spreadsheet and other applications while the game console showed a blank screen or continued playing the same repetitive game.

Another capability home computers had that game consoles of the time lacked was the ability to access remote services over telephone lines by adding a serial port interface, a modemand communication software. Though computerul își câștigă propriul venit acasă could be costly, it permitted the computer user to access services like Compuserve and private or corporate bulletin board systems to post or read messages, or to download or upload software.

Some enthusiasts with computers equipped with large storage capacity and a dedicated phone line operated bulletin boards of their own. This capability anticipated the internet by nearly twenty years. For the ColecoVision console, Coleco even announced an expansion module which would convert it into a full-fledged computer system.

computerul își câștigă propriul venit acasă

To avoid the tedious process of typing in a program listing from a book, these books would sometimes include a mail-in offer from the author to obtain the programs on disk or cassette for a few dollars.

Before the Internet, and before most computer owners had a modembooks were a popular and low-cost means of software distribution—one that had the advantage of incorporating its own documentation. These books also served a role in familiarizing new computer owners with the concepts of programming; some titles added suggested modifications to the program listings for the user to carry out. Applying a patch to modify software to be compatible with one's system opțiuni binare super snal cannel writing a utility program to fit one's needs was a skill every advanced computer owner was expected to have.

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For many of these businesses, the development of the microcomputer made computing and business software affordable where they had not been before. This was largely due to the IBM name and the system's 16 bit open architecturewhich expanded maximum memory tenfold, and also encouraged production of third-party clones.

In the late s, the based Apple II series had carved out a niche for itself in business, thanks to the industry's first killer appVisiCalcreleased in In Wayne Greenthe publisher of Kilobaud Microcomputingrecommended that companies avoid the term "home computer" in their advertising as "I feel is self-limiting for sales I prefer the term "microcomputers" since it doesn't limit the uses of the equipment in the imagination computerul își câștigă propriul venit acasă the prospective customers".

Apple consistently avoided stating that it was a home-computer company, and described the IIc as "a serious computer for the serious home user" despite competing against IBM's PCjr home computer.

John Sculley denied that his company sold home computers; rather, he said, Apple sold "computers for use in the home". Inexpensive, highly compatible clones succeeded where the PCjr had failed. Replacing the hobbyists who had made up the majority of the home computer market were, as Compute! By industry experts predicted an "MS-DOS Christmas", and the magazine stated that clones threatened Commodore, Atari, and Apple's domination of the home-computer market.

In Europe, the home computer remained a distinct presence for a few years more, with the low-end models of the bit Amiga and Atari ST families being the dominant players, but by the mids even the European market had dwindled. Naturally, these businesses chose to equip their employees with the same systems they themselves were using.

Today a computer bought for home use anywhere will be very similar to those used in offices — made by the same manufacturers, computerul își câștigă propriul venit acasă compatible peripherals, operating systems, and application software. Technology[ Probabilitatea în tranzacționare ] A Commodore 64 system, showing the basic layout of a typical home computer system of the era.

Many systems also had a dot matrix printer for producing paper output. Eastern Bloc computers were often significantly different in appearance from western computers. The Soviet Electronika BK Many home computers were superficially similar. Most had a keyboard integrated into the same case as the motherboardor, more frequently, a mainboard —while the expandable home computers appeared from the very start the Apple II offered as many as seven expansion slotsas the whole segment was generally aimed downmarketfew offers were priced or positioned high enough to allow for such expandability.

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Sometimes they were equipped with a cheap membrane or chiclet keyboard in the early days, although full-travel keyboards quickly became universal due to overwhelming consumer preference. Most systems could use an RF modulator to display 20—40 column text output on a home television.

computerul își câștigă propriul venit acasă

Indeed, the use of a television set as a display almost defines the pre-PC home computer. Although dedicated composite or " green screen " computer displays were available for this market segment and offered a sharper display, a monitor was often a later purchase made only after users had bought a floppy disk drive, printer, modem, and the other pieces of a full system.

The reason for this was that while those TV-monitors had difficulty displaying the computerul își câștigă propriul venit acasă and readable column text that became the industry standard at the time, the only consumers who really needed that were the power users utilizing the machine for business purposes, while the average casual consumer would use the system for games only and was content with the computerul își câștigă propriul venit acasă resolution for which a TV worked fine.

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An important exception was the Radio Shack TRSthe first mass-marketed computer for home use, which included its own column display monitor and full-travel keyboard as standard features.

This " peripherals sold separately" approach is another defining characteristic of the home computer era.

computerul își câștigă propriul venit acasă

A first time computer buyer who brought a base C system home and hooked it up to their TV would find they needed to buy a disk drive the Commodore was the only fully compatible model or Datasette before they could make use of it as anything but a game machine or TV Typewriter.

However, the glue logic needed to retrofit the bit CPU to an 8-bit system negated the advantages of the more powerful CPU. Processor clock rates were typically 1—2 MHz for and based CPU's and 2—4 MHz for Z80 based systems yielding roughly equal performancebut this aspect was not emphasized by users or manufacturers, as the systems' limited RAM capacity, graphics abilities and storage options had a more perceivable effect on performance than CPU speed.

For low-price computers the cost of RAM memory chips contributed greatly to the final product price to the consumer, and computerul își câștigă propriul venit acasă CPUs demanded expensive, fast memory. So designers computerul își câștigă propriul venit acasă clock rates only adequate; in some cases like the Atari and Commodore 8-bit machines, coprocessors were added to speed processing of graphics and audio data.

For these computers clock rate was considered a computerul își câștigă propriul venit acasă detail of interest only to users needing accurate timing for their own programs.

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To economize on component cost, often the same crystal used to produce color television compatible signals was also divided down and used for the processor clock.

This meant processors rarely operated at their full rated speed, and had the side-effect that European and North American versions of the same home computer operated at slightly different speeds and different video resolution due to different television standards.

Computerul își câștigă propriul venit acasă, many home computers used the then-ubiquitous compact audio cassette as a storage mechanism.

computerul își câștigă propriul venit acasă

A rough analogy to how this worked would be to place a recorder on the phone line as a file was uploaded by modem to "save" it, and playing the recording back through the modem to "load".

It was available for the TRS and some others. Eventually mass production of 5. Though external 3. Standardization of disk formats was not common; sometimes even different models from the same manufacturer used different disk formats.

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Almost universally the floppy disk drives available for 8-bit home computers were housed in external cases with their own controller boards and power supplies contained within. At any rate, to expand any computer with additional floppy drives external units would have to be plugged in.

Toward the end of the home computer era, drives for a number of home computer models appeared offering disk-format compatibility with the IBM PC. The disk drives sold with the CommodoreAmiga and Atari ST were all able to read and write PC disks, which themselves were undergoing the transition from computerul își câștigă propriul venit acasă.

Hard drives were never popular on computerul își câștigă propriul venit acasă computers, remaining an expensive, niche product mainly for BBS sysops and the few business users.

Various copy protection schemes were developed for floppy disks; most were broken in short order. Many users would only tolerate copy protection for games, as wear and tear on disks was a significant issue in an entirely floppy-based system. The ability to make a "working backup" disk of vital application software was seen as important.

Copy programs that advertised their ability to copy or even remove common protection schemes were a common category of utility software in this pre- DMCA era. In another defining characteristic of the home computer, instead of a command linethe BASIC interpreter served double duty as a user interface.

Coupled to a character-based screen or line editorBASIC's file management commands could be entered in direct mode. In contrast to modern computers, home computers most often had their operating system OS stored in ROM chips. This made startup times very fast — no more than a few seconds — but made OS upgrades difficult or impossible without buying a new unit.

Usually only computerul își câștigă propriul venit acasă most severe bugs were fixed by issuing new ROMs to replace the old ones at the user's cost. Also, the small size and limited scope of home computer "operating systems" really little more than what today would be called a kernel left little room for bugs to hide. Although modern operating systems include extensive programming libraries to ease development and promote standardization, home computer operating systems provided little support to application programs.

This gave the program full control of the hardware and allowed the programmer to optimize performance for a specific task.

Home computer

As multitasking was never common on home computers, this practice went largely unnoticed by users. Most software even lacked an exit command, requiring a reboot to use the system for something else. In an enduring reflection of their early cassette-oriented nature, most home computers loaded their disk operating system DOS separately from the main OS.

The DOS was only used for disk and file related commands and was not required to perform other computing functions. While this gave Commodore systems some advanced capabilities — a utility program could sideload a disk copy routine onto the drive and return control to the user while the computerul își câștigă propriul venit acasă copied the disk on its own — it also made Commodore drives more expensive and difficult to clone.

Many home computers had a cartridge interface which accepted ROM-based software.

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This was also used for recenzii de vizualizare tranzacționare or upgrades such as fast loaders. Application software on cartridge did exist, which loaded instantly and eliminated the need for disk swapping on single drive setups, but the vast majority of cartridges were games. Even basic PCs cost thousands of dollars and were far out of reach for typical home computerists.

computerul își câștigă propriul venit acasă

However, in the following years technological advances and improved manufacturing capabilities mainly greater use of robotics and relocation of production plants to lower-wage locations in Asia permitted several computer companies to offer lower-cost PC style machines that would become competitive with many 8-bit home-market pioneers like Radio Shack, Commodore, Atari, Texas Instruments, and Sinclair.

PCs could never become as affordable as these because the same price-reducing measures were available to all computer makers.

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