Amiga

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Amiga
Amiga Logo 1985.svg
Amiga500 system.jpg
The Amiga 500 (1987) was the best selling model.
Manufacturer Commodore International
Product familyAmiga
Type Personal computer
Game console (CD32)
Release dateJuly 23, 1985;33 years ago (1985-07-23) (Amiga 1000)
Introductory priceUS$1,295 + US$300 (monitor)
Discontinued1996 (Amiga 1200 & 4000T)
Operating system AmigaOS on Kickstart
CPU Motorola 680x0 @ ≈7 MHz & higher
Memory256 kilobytes and higher, expandable

The Amiga is a family of personal computers introduced by Commodore in 1985. The original model was part of a wave of 16- and 32-bit computers that featured 256 KB or more of RAM, mouse-based GUIs, and significantly improved graphics and audio over 8-bit systems. This wave included the Atari ST released the same yearApple's Macintosh, and later the Apple IIGS. Based on the Motorola 68000 microprocessor, the Amiga differed from its contemporaries through the inclusion of custom hardware to accelerate graphics and sound, including sprites and a blitter, and a pre-emptive multitasking operating system called AmigaOS.

Personal computer Computer intended for use by an individual person

A personal computer (PC) is a multi-purpose computer whose size, capabilities, and price make it feasible for individual use. Personal computers are intended to be operated directly by an end user, rather than by a computer expert or technician. Unlike large costly minicomputer and mainframes, time-sharing by many people at the same time is not used with personal computers.

Commodore International North American home computer and electronics manufacturer

Commodore International was an American home computer and electronics manufacturer founded by Jack Tramiel. Commodore International (CI), along with its subsidiary Commodore Business Machines (CBM), participated in the development of the home–personal computer industry in the 1970s and 1980s. The company developed and marketed the world's best-selling desktop computer, the Commodore 64 (1982), and released its Amiga computer line in July 1985. With quarterly sales ending 1983 of $49 million, Commodore was one of the world's largest personal computer manufacturers.

Atari ST home computer

The Atari ST is a line of home computers from Atari Corporation and the successor to the Atari 8-bit family. The initial ST model, the 520ST, saw limited release in April–June 1985 and was widely available in July. The Atari ST is the first personal computer to come with a bitmapped color GUI, using a version of Digital Research's GEM released in February 1985. The 1040ST, released in 1986, is the first personal computer to ship with a megabyte of RAM in the base configuration and also the first with a cost-per-kilobyte of less than US$1.

Contents

The Amiga 1000 was released in July 1985, but a series of production problems kept it from becoming widely available until early 1986. The best selling model, the Amiga 500, was introduced in 1987 and became one of the leading home computers of the late 1980s and early 1990s with four to six million sold. [1] The A3000, introduced in 1990, started the second generation of Amiga systems, followed by the A500+, and the A600 in March 1992. Finally, as the third generation, the A1200 and the A4000 were released in late 1992. The platform became particularly popular for gaming and programming demos. It also found a prominent role in the desktop video, video production, and show control business, leading to video editing systems such as the Video Toaster. The Amiga's native ability to simultaneously play back multiple digital sound samples made it a popular platform for early tracker music software. The relatively powerful processor and ability to access several megabytes of memory enabled the development of several 3D rendering packages, including LightWave 3D, Imagine, Aladdin4D, TurboSilver and Traces, a predecessor to Blender.

Amiga 1000 home computer

The Commodore Amiga 1000, also known as the A1000 and originally simply as the Amiga, is the first personal computer released by Commodore International in the Amiga line. It combines the 16/32-bit Motorola 68000 CPU which was powerful by 1985 standards with one of the most advanced graphics and sound systems in its class, and runs a preemptive multitasking operating system that fits into 256 KB of read-only memory and shipped with 256 KB of RAM. The primary memory can be expanded internally with a manufacturer-supplied 256 KB module for a total of 512 KB of RAM. Using the external slot the primary memory can be expanded up to 8.5 MB.

Amiga 500

The Amiga 500, also known as the A500, is the first low-end Commodore Amiga 16/32-bit multimedia home/personal computer. It was announced at the winter Consumer Electronics Show in January 1987 – at the same time as the high-end Amiga 2000 – and competed directly against the Atari 520ST. Before Amiga 500 was shipped, Commodore suggested that the list price of the Amiga 500 was US$595.95 without a monitor. At delivery in October 1987, Commodore announced that the Amiga 500 would carry a US$699/£499 list price. In Europe, the Amiga 500 was released in May 1987. In the Netherlands, the A500 was available from April 1987 for a list price of 1499 HFL.

Amiga 3000

The Commodore Amiga 3000, or A3000, is the third major release in the Amiga computer family. Released in June 1990, it features improved processing speed, improved rendering of graphics, and a new revision of the operating system. It is the successor to the Amiga 2000.

Although early Commodore advertisements attempt to cast the computer as an all-purpose business machine, especially when outfitted with the Amiga Sidecar PC compatibility add-on, the Amiga was most commercially successful as a home computer, with a wide range of games and creative software. [2] [3] Poor marketing and the failure of the later models to repeat the technological advances of the first systems meant that the Amiga quickly lost its market share to competing platforms, such as the fourth generation game consoles, Macintosh, and the rapidly dropping prices of IBM PC compatibles which gained 256-color VGA graphics in 1987. [1] Commodore ultimately went bankrupt in April 1994 after the Amiga CD32 model failed in the marketplace.

Amiga Sidecar

The Commodore A1060 Sidecar is an expansion hardware device developed by Commodore and released in 1986 for the Amiga 1000 computer. It features a complete PC XT-clone system mounted in an expansion case which connected to the expansion bus on the right side of the Amiga 1000 computer, sitting beside it similar to a motorcycle's sidecar, hence the name.

In the history of computer and video games, the fourth generation of game consoles began on October 30, 1987 with the Japanese release of NEC Home Electronics' PC Engine. Although NEC released the first console of this era, sales were mostly dominated by the rivalry between Nintendo's and Sega's consoles in North America: the Super Nintendo Entertainment System and the Sega Genesis. Handheld systems released during this time include the Nintendo Game Boy, released in 1989, and the Sega Game Gear, first released in 1990.

Macintosh Family of personal computers designed, manufactured, and sold by Apple Inc.

The Macintosh is a family of personal computers designed, manufactured, and sold by Apple Inc. since January 1984. The original Macintosh was the first mass-market personal computer that featured a graphical user interface, built-in screen and mouse. Apple sold the Macintosh alongside its popular Apple II family of computers for almost ten years before they were discontinued in 1993.

Since the demise of Commodore, various groups have marketed successors to the original Amiga line, including Genesi, Eyetech, ACube Systems Srl and A-EON Technology. Likewise, AmigaOS has influenced replacements, clones and compatible systems such as MorphOS, AmigaOS 4 and AROS.

Genesi

Genesi is an international group of technology and consulting companies in the United States, Mexico and Germany. It is most widely known for designing and manufacturing ARM architecture and Power ISA computing devices. The Genesi Group consists of Genesi USA Inc., Genesi Americas LLC, Genesi Europe UG, Red Efika, bPlan GmbH and the affiliated non-profit organization Power2People.

Eyetech Group Ltd is a company founded in 1983, in order to provide commercial companies with automatical data collection systems. They had already been involved in the provision of the automatic toll collection systems used at the Dartford River Crossing, as well as many of the bar code based tracking systems used by UK national parcel service.

ACube Systems Srl is a company that started in January 2007 from the synergy of the Italian companies Alternative Holding Group Srl, Soft3 and Virtual Works.

History

"The Amiga was so far ahead of its time that almost nobody—including Commodore's marketing department—could fully articulate what it was all about. Today, it's obvious the Amiga was the first multimedia computer, but in those days it was derided as a game machine because few people grasped the importance of advanced graphics, sound, and video. Nine years later, vendors are still struggling to make systems that work like 1985 Amigas."

Byte , August 1994

Concept and early development

Jay Miner joined Atari in the 1970s to develop custom integrated circuits, and led development of the Atari 2600's TIA. [4] Almost as soon as its development was complete, the team began developing a much more sophisticated set of chips, CTIA, ANTIC and POKEY, that formed the basis of the Atari 8-bit family. [5]

Jay Miner American electrical engineer

Jay Glenn Miner was an American integrated circuit designer, known primarily for developing multimedia chips for the Atari 2600 and Atari 8-bit family and as the "father of the Amiga".

Integrated circuit electronic circuit manufactured by lithography; set of electronic circuits on one small flat piece (or "chip") of semiconductor material, normally silicon 639-1 ısoo

An integrated circuit or monolithic integrated circuit is a set of electronic circuits on one small flat piece of semiconductor material that is normally silicon. The integration of large numbers of tiny transistors into a small chip results in circuits that are orders of magnitude smaller, cheaper, and faster than those constructed of discrete electronic components. The IC's mass production capability, reliability and building-block approach to circuit design has ensured the rapid adoption of standardized ICs in place of designs using discrete transistors. ICs are now used in virtually all electronic equipment and have revolutionized the world of electronics. Computers, mobile phones, and other digital home appliances are now inextricable parts of the structure of modern societies, made possible by the small size and low cost of ICs.

Atari 2600 video game console

The Atari 2600, originally sold as the Atari Video Computer System or Atari VCS until November 1982, is a home video game console from Atari, Inc. Released on September 11, 1977, it is credited with popularizing the use of microprocessor-based hardware and games contained on ROM cartridges, a format first used with the Fairchild Channel F in 1976. This contrasts with the older model of having dedicated hardware that could play only those games that were physically built into the unit. The 2600 was bundled with two joystick controllers, a conjoined pair of paddle controllers, and a game cartridge: initially Combat, and later Pac-Man.

With the 8-bit line's launch in 1979, the team once again started looking at a next generation chipset. Nolan Bushnell had sold the company to Warner Communications in 1978, and the new management was much more interested in the existing lines than development of new products that might cut into their sales. Miner wanted to start work with the new Motorola 68000, but management was only interested in another 6502 based system. Miner left the company, and the industry. [5]

Nolan Bushnell American entrepreneur

Nolan Kay Bushnell is an American electrical engineer and businessman. He established Atari, Inc. and the Chuck E. Cheese's Pizza Time Theatre chain. Bushnell has been inducted into the Video Game Hall of Fame and the Consumer Electronics Association Hall of Fame, received the BAFTA Fellowship and the Nations Restaurant News "Innovator of the Year" award, and was named one of Newsweek's "50 Men Who Changed America." Bushnell has started more than twenty companies and is one of the founding fathers of the video game industry. He is on the board of Anti-Aging Games. In 2012 he founded an educational software company called Brainrush, that is using video game technology in educational software.

Warner Communications, Inc. was an American entertainment company established in 1972 from the entertainment assets of Kinney National Company, which were spun off due to a financial scandal over its parking operations and changed its name.

Motorola 68000 microprocessor

The Motorola 68000 is a 16/32-bit CISC microprocessor, which implements a 32-bit instruction set, with 32-bit registers and 32-bit internal data bus, but with a 16-bit data ALU and two 16-bit arithmetic ALUs and a 16-bit external data bus, designed and marketed by Motorola Semiconductor Products Sector. Introduced in 1979 with HMOS technology as the first member of the successful 32-bit Motorola 68000 series, it is generally software forward-compatible with the rest of the line despite being limited to a 16-bit wide external bus. After 39 years in production, the 68000 architecture is still in use.

In 1979, Larry Kaplan left Atari and founded Activision. In 1982, Kaplan was approached by a number of investors who wanted to develop a new game platform. Kaplan hired Miner to run the hardware side of the newly formed company, "Hi-Toro". The system was code-named "Lorraine" in keeping with Miner's policy of giving systems female names, in this case the company president's wife, Lorraine Morse. [6] When Kaplan left the company late in 1982, Miner was promoted to head engineer [5] and the company relaunched as Amiga Corporation. [7]

A breadboard prototype was largely completed by late 1983, and shown at the January 1984 Consumer Electronics Show (CES) with the Boing Ball demo. A further developed version was demonstrated at the June 1984 CES and shown to many companies in hopes of garnering further funding, but found little interest in a market that was in the final stages of the North American video game crash of 1983. [6] [8]

In March, Atari expressed a tepid interest in Lorraine for its potential use in a games console or home computer tentatively known as the 1850XLD. But the talks were progressing slowly, [9] and Amiga was running out of money. A temporary arrangement led to a $500,000 loan from Atari to Amiga to keep the company going. The terms required the loan to be repaid in one month, otherwise Amiga would forfeit the Lorraine design to Atari.

Commodore launch

During 1983, Atari lost over $1 million a week, due to the combined effects of the crash and the ongoing price war in the home computer market. Warner became desperate to sell the company. Jack Tramiel resigned from Commodore in January 1984 due to internal battles over the future direction of the company. In June, Tramiel arranged a no-cash deal to take over Atari and reformed it as Atari Corporation.

Tramiel's purchase of Atari resulted in a considerable number of Commodore employees following him, including a number of the senior technical staff. This left Commodore with no workable path to a next generation computer. The company approached Amiga offering to fund development as a home computer system. They quickly arranged to repay the Atari loan, ending that threat. The two companies were initially arranging a $4 million license agreement before Commodore offered $24 million to purchase Amiga outright. [10]

By late 1984 the prototype breadboard chipset had successfully been turned into integrated circuits, and the system hardware was being readied for production. At this time the operating system (OS) was not as ready, and led to a deal to port an OS known as TRIPOS to the platform. TRIPOS was a multitasking system that had been written in BCPL during the 1970s for minicomputer systems like the PDP-11, but later experimentally ported to the 68000. This early version was known as AmigaDOS and the GUI as Workbench. The BCPL parts were later rewritten in the C language, and the entire system became AmigaOS.

The system was enclosed in a pizza box form factor case; a late change was the introduction of vertical supports on either side of the case to provide a "garage" under the main section of the system where the keyboard could be stored. [11]

The first model was announced in 1985 as simply "The Amiga from Commodore", later to be retroactively dubbed the Amiga 1000. [lower-alpha 1] They were first offered for sale in August, but by October only 50 had been built, all of which were used by Commodore. Machines only began to arrive in quantity in mid-November, meaning they missed the Christmas buying rush. [12] By the end of the year, they had sold 35,000 machines, and severe cashflow problems made the company pull out of the January 1986 CES. [13] Bad or entirely missing marketing, forcing the development team to move to the east coast, notorious stability problems and other blunders limited sales in early 1986 to between 10,000 and 15,000 units a month. [11]

Commercial success

In late 1985 Thomas Rattigan was promoted to COO of Commodore, and then to CEO in February 1986. He immediately implemented an ambitious plan that covered almost all of the company's operations. Among these were the long overdue cancelation of the now outdated PET and VIC-20 lines, as well as a variety of poorly selling Commodore 64 offshoots and the Commodore 900 workstation effort. [14]

Another of the changes was to split the Amiga into two products, a new high-end version of the Amiga aimed at the creative market, and a cost-reduced version that would take over for the Commodore 64 in the low-end market. [14] These new designs were released in 1987 as the Amiga 2000 and Amiga 500, the latter of which went on to widespread success and became their best selling model.

Similar high-end/low-end models would make up the Amiga line for the rest of its history; follow-on designs included the Amiga 3000/Amiga 500 Plus/Amiga 600, and the Amiga 4000/Amiga 1200. These models incorporated a series of technical upgrades known as the ECS and AGA, which added higher resolution displays among many other improvements and simplifications.

Ultimately the Amiga line would sell an estimated 4,850,000 machines over its lifetime. The machines were most popular in the UK and Germany, with about 1.5 million sold in each country, and sales in the high hundreds of thousands in other European nations. The machine was less popular in North America, where an estimated 700,000 were sold. [15] In particular, in the U.S. the Amiga did not achieve any success outside of Commodore's traditional enthusiast market except in vertical markets for video processing and editing. [16]

Bankruptcy

In spite of his successes in making the company profitable and bringing the Amiga line to market, Rattigan was soon forced out in a power struggle with majority shareholder, Irving Gould. This is widely regarded as the turning point, as further improvements to the Amiga were eroded by rapid improvements in other platforms. [17]

In 1994, Commodore filed for bankruptcy and its assets were purchased by Escom, a German PC manufacturer, who created the subsidiary company Amiga Technologies. They re-released the A1200 and A4000T, and introduced a new 68060 version of the A4000T. However, Escom in turn went bankrupt in 1997.

The Amiga brand was then sold to a US Wintel PC manufacturer, Gateway 2000, which had announced grand plans for it. However, in 2000, Gateway sold the Amiga brand without having released any products. The current owner of the trademark, Amiga, Inc., licensed the rights to sell hardware using either the Amiga or AmigaOne brand to Eyetech Group, Hyperion Entertainment and Commodore USA.

Hardware

Amiga 1000 Amiga 1000 computer.jpg
Amiga 1000
Amiga 600 Amiga 600.jpg
Amiga 600
Amiga 1200 Amiga 1200 with mouse, drives.jpg
Amiga 1200
Amiga CD32 Amiga-CD32-wController-L.jpg
Amiga CD32
Amiga diskette containing the Deluxe Paint bitmap graphics editing program Deluxe Paint for Amiga.jpg
Amiga diskette containing the Deluxe Paint bitmap graphics editing program

At its core, the Amiga has a custom chipset consisting of several coprocessors, which handle audio, video and direct memory access independently of the Central Processing Unit (CPU). This architecture freed up the Amiga's processor for other tasks and gave the Amiga a performance edge over its competitors, particularly in terms of video-intensive applications and games. [18]

The general Amiga architecture uses two distinct bus subsystems, namely, the chipset bus and the CPU bus. The chipset bus allows the custom coprocessors and CPU to address "Chip RAM". The CPU bus provides addressing to other subsystems, such as conventional RAM, ROM and the Zorro II or Zorro III expansion subsystems. This architecture enables independent operation of the subsystems; the CPU "Fast" bus can be much faster than the chipset bus. CPU expansion boards may provide additional custom buses. Additionally, "busboards" or "bridgeboards" may provide ISA or PCI buses. [18]

Central processing unit

The Motorola 68000 series of microprocessors was used in all Amiga models from Commodore. While all CPU in the 68000 family have a 32-bit ISA design (programmer uses and sees a 32-bit model), the MC68000 used in the most popular models is a 16-bit (or 16/32-bit) processor because its ALU operates in 16-bit (32-bit operations require additional clock cycles, consuming more time). [19] [20] The MC68000 has a 16-bit external data bus so 32-bits of data is transferred in two consecutive steps, a technique called multiplexing. This is transparent to the software, which was 32-bit from the beginning. The MC68000 can address 16 MB of physical memory. Later Amiga models featured higher-speed, full 32-bit CPUs with a larger address space and instruction pipeline facilities.

CPU upgrades were offered by both Commodore and third-party manufacturers. Most Amiga models can be upgraded either by direct CPU replacement or through expansion boards. Such boards often featured faster and higher capacity memory interfaces and hard disk controllers.

Towards the end of Commodore's time in charge of Amiga development there were suggestions that Commodore intended to move away from the 68000 series to higher performance RISC processors, such as the PA-RISC. [21] [22] However, these ideas were never developed before Commodore filed for bankruptcy. Despite this, third-party manufacturers designed upgrades featuring a combination of 68000 series and PowerPC processors along with a PowerPC native microkernel and software. [23] [24] Later Amiga clones featured PowerPC processors only.

Custom chipset

The custom chipset at the core of the Amiga design appeared in three distinct generations, with a large degree of backward-compatibility. The Original Chip Set (OCS) appeared with the launch of the A1000 in 1985. OCS was eventually followed by the modestly improved Enhanced Chip Set (ECS) in 1990 and finally by the partly 32-bit Advanced Graphics Architecture (AGA) in 1992. Each chipset consists of several coprocessors which handle graphics acceleration, digital audio, direct memory access and communication between various peripherals (e.g., CPU, memory and floppy disks). In addition, some models featured auxiliary custom chips which performed tasks such as SCSI control and display de-interlacing.

Graphics

A 4096 color HAM picture created with Photon Paint in 1989 HAM6example.png
A 4096 color HAM picture created with Photon Paint in 1989

All Amiga systems can display full-screen animated graphics with 2, 4, 8, 16, 32, 64 (EHB Mode), or 4096 colors (HAM Mode). Models with the AGA chipset (A1200 and A4000) also have non-EHB 64, 128, 256, and 262144 (HAM8 Mode) color modes and a palette expanded from 4096 to 16.8 million colors.

The Amiga chipset can genlock , which is the ability to adjust its own screen refresh timing to match an incoming NTSC or PAL video signal. When combined with setting transparency, this allows an Amiga to overlay an external video source with graphics. This ability made the Amiga popular for many applications, and provides the ability to do character generation and CGI effects far more cheaply than earlier systems. This ability has been frequently utilized by wedding videographers, TV stations and their weather forecasting divisions (for weather graphics and radar), advertising channels, music video production, and desktop videographers. The NewTek Video Toaster was made possible by the genlock ability of the Amiga.

In 1988, the release of the Amiga A2024 fixed-frequency monochrome monitor with built-in framebuffer and flicker fixer hardware provided the Amiga with a choice of high-resolution graphic modes (1024×800 for NTSC and 1024×1024 for PAL). [25]

ReTargetable Graphics

ReTargetable Graphics is an API for device drivers mainly used by 3rd party graphics hardware to interface with AmigaOS via a set of libraries. The software libraries may include software tools to adjust resolution, screen colors, pointers and screenmodes. The standard Intuition interface is limited to display depths of 8-bits, while RTG makes it possible to handle higher depths like 24-bits.

Sound

The sound chip, named Paula, supports four PCM-sample-based sound channels (two for the left speaker and two for the right) with 8-bit resolution for each channel and a 6-bit volume control per channel. The analog output is connected to a low-pass filter, which filters out high-frequency aliases when the Amiga is using a lower sampling rate (see Nyquist frequency). The brightness of the Amiga's power LED is used to indicate the status of the Amiga's low-pass filter. The filter is active when the LED is at normal brightness, and deactivated when dimmed (or off on older A500 Amigas). On Amiga 1000 (and first Amiga 500 and Amiga 2000 model), the power LED had no relation to the filter's status, and a wire needed to be manually soldered between pins on the sound chip to disable the filter. Paula can read directly from the system's RAM, using direct memory access (DMA), making sound playback without CPU intervention possible.

Although the hardware is limited to four separate sound channels, software such as OctaMED uses software mixing to allow eight or more virtual channels, and it was possible for software to mix two hardware channels to achieve a single 14-bit resolution channel by playing with the volumes of the channels in such a way that one of the source channels contributes the most significant bits and the other the least.

The quality of the Amiga's sound output, and the fact that the hardware is ubiquitous and easily addressed by software, were standout features of Amiga hardware unavailable on PC platforms for years. Third-party sound cards exist that provide DSP functions, multi-track direct-to-disk recording, multiple hardware sound channels and 16-bit and beyond resolutions. A retargetable sound API called AHI was developed allowing these cards to be used transparently by the OS and software.

Kickstart firmware

Kickstart is the firmware upon which AmigaOS is bootstrapped. Its purpose is to initialize the Amiga hardware and core components of AmigaOS and then attempt to boot from a bootable volume, such as a floppy disk or hard disk drive. Most models (excluding the Amiga 1000) come equipped with Kickstart on an embedded ROM-chip.

Keyboard and mouse

Amiga mouse Amiga Mouse.jpg
Amiga mouse

The keyboard on Amiga computers is similar to that found on a mid 80s IBM PC: Ten function keys, a numeric keypad, and four separate directional arrow keys. Caps Lock and Control share space to the left of A. Missing are the Home, End, Page Up, and Page Down keys: These are accomplished on Amigas by pressing shift and the appropriate arrow key. The Amiga keyboard adds a Help key, which a function key usually acts as on PCs (usually F1). In addition to the Control and Alt modifier keys, the Amiga has 2 'Amiga' keys, rendered as 'Open Amiga' and 'Closed Amiga' similar to the Open/Closed Apple logo keys on Apple II keyboards. The left is used to manipulate the operating system (moving screens and the like) and the right delivered commands to the application. The absence of Num lock frees space for more math symbols around the number pad. Contemporary Macintosh computers, for comparison, lack function keys completely.

The mouse has two buttons like Windows, but unlike Windows pressing and holding the right button replaces the system status line at the top of the screen with a Maclike menu bar. As with Apple's Mac OS prior to Mac OS 8, menu options are selected by releasing the button over that option, not by left clicking. Menu items that have a boolean toggle state can be left clicked whilst the menu is kept open with the right button, this allows the user - for example - to set some selected text to bold, underline and italics all at once.

The mouse plugs into one of two Atari joystick ports used for joysticks, game paddles, and graphics tablets. Although compatible with analog joysticks, Atari-style digital joysticks became standard. [26]

Other peripherals and expansions

8-bit sound sampling hardware for the Amiga Amiga Sound Sampling Hardware.jpg
8-bit sound sampling hardware for the Amiga

The Amiga was one of the first computers for which inexpensive sound sampling and video digitization accessories were available. As a result of this and the Amiga's audio and video capabilities, the Amiga became a popular system for editing and producing both music and video.

Many expansion boards were produced for Amiga computers to improve the performance and capability of the hardware, such as memory expansions, SCSI controllers, CPU boards, and graphics boards. Other upgrades include genlocks, network cards for Ethernet, modems, sound cards and samplers, video digitizers, extra serial ports, and IDE controllers. Additions after the demise of Commodore company are USB cards. The most popular upgrades were memory, SCSI controllers and CPU accelerator cards. These were sometimes combined into the one device.

Early CPU accelerator cards feature full 32-bit CPUs of the 68000 family such as the Motorola 68020 and Motorola 68030, almost always with 32-bit memory and usually with FPUs and MMUs or the facility to add them. Later designs feature the Motorola 68040 or Motorola 68060. Both CPUs feature integrated FPUs and MMUs. Many CPU accelerator cards also had integrated SCSI controllers.

Phase5 designed the PowerUP boards (Blizzard PPC and CyberStorm PPC) featuring both a 68k (a 68040 or 68060) and a PowerPC (603 or 604) CPU, which are able to run the two CPUs at the same time and share the system memory. The PowerPC CPU on PowerUP boards is usually used as a coprocessor for heavy computations; a powerful CPU is needed to run MAME for example, but even decoding JPEG pictures and MP3 audio was considered heavy computation at the time. It is also possible to ignore the 68k CPU and run Linux on the PPC via project Linux APUS, but a PowerPC-native AmigaOS promised by Amiga Technologies GmbH was not available when the PowerUP boards first appeared. [27]

24-bit graphics cards and video cards were also available. Graphics cards were designed primarily for 2D artwork production, workstation use, and later, gaming. Video cards are designed for inputting and outputting video signals, and processing and manipulating video.

In the North American market, the NewTek Video Toaster was a video effects board which turned the Amiga into an affordable video processing computer which found its way into many professional video environments. One well-known use was to create the special effects in early series of Babylon 5 . [28] Due to its NTSC-only design, it did not find a market in countries that used the PAL standard, such as in Europe. In those countries, the OpalVision card was popular, although less featured and supported than the Video Toaster. Low-cost time base correctors (TBC) specifically designed to work with the Toaster quickly came to market, most of which were designed as standard Amiga bus cards.

Various manufacturers started producing PCI busboards for the A1200, A3000 and A4000, allowing standard Amiga computers to use PCI cards such as graphics cards, Sound Blaster sound cards, 10/100 Ethernet cards, USB cards, and television tuner cards. Other manufacturers produced hybrid boards which contained an Intel x86 series chip, allowing the Amiga to emulate a PC.

PowerPC upgrades with Wide SCSI controllers, PCI busboards with Ethernet, sound and 3D graphics cards, and tower cases allowed the A1200 and A4000 to survive well into the late nineties.

Expansion boards were made by Richmond Sound Design that allow their show control and sound design software to communicate with their custom hardware frames either by either ribbon cable or fiber optic cable for long distances, allowing the Amiga to control up to eight million digitally controlled external audio, lighting, automation, relay and voltage control channels spread around a large theme park, for example. See Amiga software for more information on these applications.

Other devices included the following:

Serial ports

The Commodore A2232 board provides seven RS-232C serial ports in addition to the Amiga's built-in serial port. Each port can be driven independently at speeds of 50 to 19,200 bits/s. There is however a driver available on Aminet that allows two of the serial ports to be driven at 115 200 bits/s. [38] The serial card used the 65CE02 CPU [39] clocked at 3.58 MHz. [38] This CPU was also part of the CSG 4510 CPU core that was used in the Commodore 65 computer.

Networking

Amiga has three networking interface APIs:

  • AS225: the official Commodore TCP/IP stack API with hard-coded drivers in revision 1 (AS225r1) for the A2065 Ethernet and the A2060 Arcnet interfaces. [35] In revision 2, (AS225r2) the SANA-II interface was used.
  • SANA-II: a standardized API for hardware of network interfaces. It uses an inefficient buffer handling scheme, and lacks proper support for promiscuous and multicast modes.
  • Miami Network Interface (MNI): an API that doesn't have the problems which SANA-II suffers from. It requires AmigaOS v2.04 or higher.

Different network media were used:

TypeSpeedExample
Ethernet A2065 [32]
ARCNET A560, [40] A2060 [41]
Floppy disk controller Amitrix: Amiga-Link [42]
Serial port RS-232
Parallel port Village Tronic: Liana [43]
Token ring Nine Tiles: AmigaLink (9 Tiles) [44]
AppleTalk / LocalTalk PPS-Doubletalk [45]

Models and variants

The original Amiga models were produced from 1985 to 1996. [46] They are, in order of production: 1000, 2000, 500, 1500, 2500, 3000, 3000UX, 3000T, CDTV, 500+, 600, 4000, 1200, CD32, and 4000T. The PowerPC based AmigaOne computers were later marketed since 2002. Several companies and private persons have also released Amiga clones and still do so today.

Commodore Amiga

The Amiga 1000 (1985) was the first model released. Amiga 1000DP.jpg
The Amiga 1000 (1985) was the first model released.
The Amiga 4000 (1992) was the last desktop computer made by Commodore. Amiiga4000DP.jpg
The Amiga 4000 (1992) was the last desktop computer made by Commodore.

The first Amiga model, the Amiga 1000, was launched in 1985. In 2006, PC World rated the Amiga 1000 as the seventh greatest PC of all time, stating "Years ahead of its time, the Amiga was the world's first multimedia, multitasking personal computer". [48]

Commodore updated the desktop line of Amiga computers with the Amiga 2000 in 1987, the Amiga 3000 in 1990, and the Amiga 4000 in 1992, each offering improved capabilities and expansion options. However, the best selling models were the budget models, particularly the highly successful Amiga 500 (1987) and the Amiga 1200 (1992). The Amiga 500+ (1991) was the shortest lived model, replacing the Amiga 500 and lasting only six months until it was phased out and replaced with the Amiga 600 (1992), which in turn was also quickly replaced by the Amiga 1200. [49]

The CDTV, launched in 1991, was a CD-ROM based all-in-one multimedia system. It was an early attempt at a multi-purpose multimedia appliance in an era before multimedia consoles and CD-ROM drives were common. Unfortunately for Commodore, the system never achieved any real commercial success. Like the Commodore 64GS that was a video game console based on a computer, the CDTV was designed as a video game console and multimedia platform. It had existed before the Sony PlayStation and Sega Saturn, but had influenced them[ citation needed ]. It competed with the Turbo-Grafx CD and Sega CD system add ons when it was being sold.

Commodore's last Amiga offering before filing for bankruptcy was an attempt to capture a portion of the highly competitive 1990s console market with the Amiga CD32 (1993), a 32-bit CD-ROM games console. Although discontinued after Commodore's demise it met with moderate commercial success in Europe. The CD32 was a next generation CDTV, and it was designed to save Commodore by entering the growing video game console market.

Following purchase of Commodore's assets by Escom in 1995, the A1200 and A4000T continued to be sold in small quantities until 1996, though the ground lost since the initial launch and the prohibitive expense of these units meant that the Amiga line never regained any real popularity.

Several Amiga models contained references to songs by the rock band The B-52's. Early A500 units had the words "B52/ROCK LOBSTER" [50] silk-screen printed onto their printed circuit board, a reference to the song "Rock Lobster" The Amiga 600 referenced "JUNE BUG" (after the song "Junebug") and the Amiga 1200 had "CHANNEL Z" (after "Channel Z")., [51] and the CD-32 had "Spellbound."

AmigaOS 4 systems

AmigaOS 4 is designed for PowerPC Amiga systems. It is mainly based on AmigaOS 3.1 source code, with some parts of version 3.9. Currently runs on both Amigas equipped with CyberstormPPC or BlizzardPPC accelerator boards, on the Teron series based AmigaOne computers built by Eyetech under license by Amiga, Inc., on the Pegasos II from Genesi/bPlan GmbH, on the ACube Systems Srl Sam440ep / Sam460ex / AmigaOne 500 systems and on the A-EON AmigaOne X1000.

AmigaOS 4.0 had been available only in developer pre-releases for numerous years until it was officially released in December 2006. [52] Due to the nature of some provisions of the contract between Amiga Inc. and Hyperion Entertainment (the Belgian company which is developing the OS), the commercial AmigaOS 4 had been available only to licensed buyers of AmigaOne motherboards.

AmigaOS 4.0 for Amigas equipped with PowerUP accelerator boards was released in November 2007. [53] Version 4.1 was released in August 2008 for AmigaOne systems, [54] [55] and in May 2011 for Amigas equipped with PowerUP accelerator boards. [56] The most recent release of AmigaOS for all supported platforms is 4.1 update 5. [57] Starting with release 4.1 update 4 there is an Emulation drawer containing official AmigaOS 3.x ROMs (all classic Amiga models including CD32) and relative Workbench files.

Acube Systems entered an agreement with Hyperion under which it has ported AmigaOS 4 to its Sam440ep and Sam460ex line of PowerPC-based motherboards. [58] In 2009 a version for Pegasos II was released in co-operation with Acube Systems. [59] In 2012, A-EON Technology Ltd manufactured and released the AmigaOne X1000 to consumers through their partner, Amiga Kit who provided end-user support, assembly and worldwide distribution of the new system.

Amiga hardware clones

Long-time Amiga developer MacroSystem entered the Amiga-clone market with their DraCo non-linear video editing system. [60] It appears in two versions, initially a tower model and later a cube. DraCo expanded upon and combined a number of earlier expansion cards developed for Amiga (VLabMotion, Toccata, WarpEngine, RetinaIII) into a true Amiga-clone powered by the Motorola 68060 processor. The DraCo can run AmigaOS 3.1 up through AmigaOS 3.9. It is the only Amiga-based system to support FireWire for video I/O. DraCo also offers an Amiga-compatible Zorro-II expansion bus and introduced a faster custom DraCoBus, capable of 30 MB/sec transfer rates (faster than Commodore's Zorro-III). The technology was later used in the Casablanca system, a set-top-box also designed for non-linear video editing.

In 1998, Index Information released the Access, an Amiga-clone similar to the Amiga 1200, but on a motherboard which could fit into a standard 5¼" drive bay. It features either a 68020 or 68030 CPU, with a redesigned AGA chipset, and runs AmigaOS 3.1.

In 1998, former Amiga employees (John Smith, Peter Kittel, Dave Haynie and Andy Finkel to mention few) formed a new company called PIOS. Their hardware platform, PIOS One, was aimed at Amiga, Atari and Macintosh users. The company was renamed to Met@box in 1999 until it folded. [61]

The NatAmi (short for Native Amiga) hardware project began in 2005 with the aim of designing and building an Amiga clone motherboard that is enhanced with modern features. [62] The NatAmi motherboard is a standard Mini-ITX-compatible form factor computer motherboard, powered by a Motorola/Freescale 68060 and its chipset. It is compatible with the original Amiga chipset, which has been inscribed on a programmable FPGA Altera chip on the board. The NatAmi is the second Amiga clone project after the Minimig motherboard, and its history is very similar to that of the C-One mainboard developed by Jeri Ellsworth and Jens Schönfeld. From a commercial point of view, Natami's circuitry and design are currently closed source.[ citation needed ] One goal of the NatAmi project is to design an Amiga-compatible motherboard that includes up-to-date features but that does not rely on emulation (as in WinUAE), modern PC Intel components, or a modern PowerPC mainboard. As such, NatAmi is not intended to become another evolutionary heir to classic Amigas, such as with AmigaOne or Pegasos computers. This "purist" philosophy essentially limits the resulting processor speed but puts the focus on bandwidth and low latencies. The developers also recreated the entire Amiga chipset, freeing it from legacy Amiga limitations such as two megabytes of audio and video graphics RAM as in the AGA chipset, and rebuilt this new chipset by programming a modern FPGA Altera Cyclone IV chip. Later, the developers decided to create from scratch a new software-form processor chip, codenamed "N68050" that resides in the physical Altera FPGA programmable chip. [63]

In 2006, two new Amiga clones were announced, both using FPGA based hardware synthesis to replace the Amiga OCS custom chipset. The first, the Minimig, is a personal project of Dutch engineer Dennis van Weeren. Referred to as "new Amiga hardware", [64] the original model was built on a Xilinx Spartan-3 development board, but soon a dedicated board was developed. The minimig uses the FPGA to reproduce the custom Denise, Agnus, Paula and Gary chips as well as both 8520 CIAs and implements a simple version of Amber. The rest of the chips are an actual 68000 CPU, ram chips, and a PIC microcontroller for BIOS control. [64] The design for Minimig was released as open-source on July 25, 2007. In February 2008, an Italian company Acube Systems began selling Minimig boards. A third party upgrade replaces the PIC microcontroller with a more powerful ARM processor, providing more functionality such as write access and support for hard disk images. The Minimig core has been ported to the FPGArcade "Replay" board. The Replay uses an FPGA with about 3 times more capacity and which does support the AGA chipset and a 68020 soft core with 68030 capabilities. The Replay board is designed to implement many older computers and classic arcade machines.

The second is the Clone-A system announced by Individual Computers. As of mid 2007 it has been shown in its development form, with FPGA-based boards replacing the Amiga chipset and mounted on an Amiga 500 motherboard. [65]

Emulation

Like many popular but discontinued platforms, the Amiga has been emulated so that software developed for the Amiga can be run on other computer platforms without the original hardware. Such emulators attempt to replicate the functionality of the Amiga architecture in software. As mentioned above, attempts have also been made to replicate the Amiga chipset in FPGA chips. [66]

One of the most challenging aspects of emulation is the design of the Amiga chipset, which relies on cycle-critical timings. As a result, early emulators did not always achieve the intended results though later emulator versions can now accurately reproduce the behavior of Amiga systems.[ citation needed ]

Operating systems

AmigaOS

AmigaOne X1000 running AmigaOS 4.1 AmigaOne X1000 02.jpg
AmigaOne X1000 running AmigaOS 4.1

"[AmigaOS] remains one of the great operating systems of the past 20 years, incorporating a small kernel and tremendous multitasking capabilities the likes of which have only recently been developed in OS/2 and Windows NT. The biggest difference is that the AmigaOS could operate fully and multitask in as little as 250 K of address space.

John C. Dvorak, PC Magazine, October 1996. [67]

AmigaOS is a single-user multitasking operating system. It was developed first by Commodore International, and initially introduced in 1985 with the Amiga 1000. Original versions run on the Motorola 68000 series of microprocessors, while AmigaOS 4 runs only on PowerPC microprocessors. At the time of release AmigaOS put an operating system that was well ahead of its time into the hands of the average consumer. It was one of the first commercially available consumer operating systems for personal computers to implement preemptive multitasking.

AmigaOS Workbench 1.3 bootscreen AmigaOS workbench 13.svg
AmigaOS Workbench 1.3 bootscreen

Another notable feature was the combined use of both a command-line interface and graphical user interface. AmigaDOS was the disk operating system and command line portion of the OS and Workbench the native graphical windowing, icons, menu and pointer environment for file management and launching applications. Notably, AmigaDOS allowed long filenames (up to 107 characters) with whitespace and did not require filename extensions. The windowing system and user interface engine which handles all input events is called Intuition. [68]

The multi-tasking kernel is called Exec. It acts as a scheduler for tasks running on the system, providing pre-emptive multitasking with prioritised round-robin scheduling. It enabled true pre-emptive multitasking in as little as 256 KB of free memory. [69] [70]

AmigaOS does not implement memory protection, because the 68000 CPU does not include a memory management unit. [71] Although this speeds and eases inter-process communication because programs can communicate by simply passing a pointer back and forth, the lack of memory protection made the AmigaOS more vulnerable to crashes from badly behaving programs than other multitasking systems that did implement memory protection, [72] and Amiga OS is fundamentally incapable of enforcing any form of security model since any program had full access to the system. A co-operational memory protection feature was implemented in AmigaOS 4 and could be retrofitted to old AmigaOS systems using Enforcer or CyberGuard tools.

The problem was somewhat exacerbated by Commodore's initial decision to release documentation relating not only to the OS's underlying software routines, but also to the hardware itself, enabling intrepid programmers who had developed their skills on the Commodore 64 to POKE the hardware directly, as was done on the older platform. While the decision to release the documentation was a popular one and allowed the creation of fast, sophisticated sound and graphics routines in games and demos, it also contributed to system instability as some programmers lacked the expertise to program at this level. For this reason, when the new AGA chipset was released, Commodore declined to release low-level documentation in an attempt to force developers into using the approved software routines.

Influence on other operating systems

AmigaOS directly or indirectly inspired the development of various operating systems. MorphOS and AROS clearly inherit heavily from the structure of AmigaOS as explained directly in articles regarding these two operating systems. AmigaOS also influenced BeOS, which featured a centralized system of Datatypes, similar to that present in AmigaOS. Likewise, DragonFly BSD was also inspired by AmigaOS as stated by Dragonfly developer Matthew Dillon who is a former Amiga developer. [73] [74] WindowLab and amiwm are among several window managers for the X Window System seek to mimic the Workbench interface. IBM licensed the Amiga GUI from Commodore in exchange for the REXX language license. This allowed OS/2 to have the WPS (Work Place Shell) GUI shell for OS/2 2.0 a 32-bit operating system. [75] [76]

Unix and Unix-like systems

Commodore-Amiga produced Amiga Unix, informally known as Amix, based on AT&T SVR4. It supports the Amiga 2500 and Amiga 3000 and is included with the Amiga 3000UX. Among other unusual features of Amix is a hardware-accelerated windowing system which can scroll windows without copying data. Amix is not supported on the later Amiga systems based on 68040 or 68060 processors.

Other, still maintained, operating systems are available for the classic Amiga platform, including Linux and NetBSD. Both require a CPU with MMU such as the 68020 with 68851 or full versions of the 68030, 68040 or 68060. There is also a version of Linux for Amigas with PowerPC accelerator cards. Debian and Yellow Dog Linux can run on the AmigaOne.

There is an official, older version of OpenBSD. The last Amiga release is 3.2. MINIX 1.5.10 also runs on Amiga. [77]

Emulating other systems

The Amiga is able to emulate other computer platforms ranging from many 8-bit systems such as the ZX Spectrum, Commodore 64, Nintendo Game Boy, Nintendo Entertainment System, Apple II and the TRS-80. The Commodore PC-Transformer software emulated an IBM 5150 at 1 MHz in Monochrome mode. Later PC-Bridgecards were a full hardware PC on a card with 8086/80286/80386 Intel chips running MS-DOS and Windows in an Amiga window. A-Max emulated an Apple Macintosh using a serial port dongle that had a Macintosh ROM on it. The Amiga had the same 68000 CPU as the Macintosh and, using a Macintosh emulator, could run Mac 68K operating systems and programs. However, the Amiga could not directly read Macintosh 3.5" floppies due to their proprietary format. Further, it required a compatible Macintosh for a copy of its ROM. The Atari ST was also emulated. MAME (the arcade machine emulator) is also available for Amiga systems with PPC accelerator card upgrades.

Amiga software

In the late 1980s and early 1990s the platform became particularly popular for gaming, demoscene activities and creative software uses. During this time commercial developers marketed a wide range of games and creative software, often developing titles simultaneously for the Atari ST due to the similar hardware architecture. Popular creative software included 3D rendering (ray-tracing) packages, bitmap graphics editors, desktop video software, software development packages and "tracker" music editors.

Until the late 1990s the Amiga remained a popular platform for non-commercial software, often developed by enthusiasts, and much of which was freely redistributable. An on-line archive, Aminet, was created in 1992 and until around 1996 was the largest public archive of software, art and documents for any platform.

Marketing

Logo used in the US on some product packaging for the Amiga 500 Amiga-90sLogo.gif
Logo used in the US on some product packaging for the Amiga 500
Amiga Technologies logo incorporating the "Boing Ball" (1996) Recent Amiga.svg
Amiga Technologies logo incorporating the "Boing Ball" (1996)

The name Amiga was chosen by the developers from the Spanish word for a female friend, because they knew Spanish, [78] and because it occurred before Apple and Atari alphabetically. It also conveyed the message that the Amiga computer line was "user friendly" as a pun or play on words. [79]

The first official Amiga logo was a rainbow-colored double check mark. In later marketing material Commodore largely dropped the checkmark and used logos styled with various typefaces. Although it was never adopted as a trademark by Commodore, the "Boing Ball" has been synonymous with Amiga since its launch. It became an unofficial and enduring theme after a visually impressive animated demonstration at the 1984 Winter Consumer Electronics Show in January 1984 showing a checkered ball bouncing and rotating. Following Escom's purchase of Commodore in 1996, the Boing Ball theme was incorporated into a new logo. [80]

Early Commodore advertisements attempted to cast the computer as an all-purpose business machine, though the Amiga was most commercially successful as a home computer. [2] [3] Throughout the 1980s and early 1990s Commodore primarily placed advertising in computer magazines and occasionally in national newspapers and on television.

Legacy

Since the demise of Commodore, various groups have marketed successors to the original Amiga line:

AmigaOS and MorphOS are commercial proprietary operating systems. AmigaOS 4, based on AmigaOS 3.1 source code with some parts of version 3.9, is developed by Hyperion Entertainment and runs on PowerPC based hardware. MorphOS, based on some parts of AROS source code, is developed by MorphOS Team and is continued on Apple and other PowerPC based hardware.

There is also AROS, a free and open source operating system (re-implementation of the AmigaOS 3.1 APIs), for Amiga 68k, x86 and ARM hardware (one version runs Linux-hosted on the Raspberry Pi). In particular, AROS for Amiga 68k hardware aims to create an open source Kickstart ROM replacement for emulation purpose and/or for use on real "classic" hardware. [81]

Amiga community

After Commodore went bankrupt in 1994, an active Amiga community continued to support the platform long after mainstream commercial vendors abandoned it. The most popular Amiga magazine, Amiga Format , continued to publish editions until 2000, some six years after Commodore filed for bankruptcy. Another magazine, Amiga Active , was launched in 1999 and was published until 2001. In spite of declining interest in the platform, there was a bi-weekly specialist column in the UK weekly magazine Micro Mart .

Several notable magazines are in publication today: Amiga Future, [82] which is available in both English and German; Bitplane.it, [83] a bi-monthly magazine in Italian; and AmigaPower, [84] a long-running French magazine.

Notable historic uses

The Amiga series of computers found a place in early computer graphic design and television presentation. Below are some examples of notable uses and users:

In addition, many other celebrities and notable individuals have made use of the Amiga: [89]

Other uses

The Amiga was also used in a number of special purpose applications:

See also

Notes

  1. The name "Amiga" was chosen because it is the Spanish word for (female) friend, and alphabetically it appears before Apple in lists of computer makers. It originated as a project code-named "Lorraine", therefore the female was used instead of the male and general version Amigo.

Related Research Articles

Atari 8-bit family series of 8-bit home computers

The Atari 8-bit family is a series of 8-bit home computers introduced by Atari, Inc. in 1979 and manufactured until 1992. All of the machines in the family are technically similar and differ primarily in packaging. They are based on the MOS Technology 6502 CPU running at 1.79 MHz, and were the first home computers designed with custom co-processor chips. This architecture enabled graphics and sound capabilities that were more advanced than contemporary machines at the time of release, and gaming on the platform was a major draw. Star Raiders is considered the platform's killer app.

The Motorola 68000 series is a family of 32-bit CISC microprocessors. During the 1980s and early 1990s, they were popular in personal computers and workstations and were the primary competitors of Intel's x86 microprocessors. They were most well known as the processors powering the early Apple Macintosh, the Commodore Amiga, the Sinclair QL, the Atari ST, the Sega Genesis, and several others. Although no modern desktop computers are based on processors in the 68000 series, derivative processors are still widely used in embedded systems.

Amiga 600 home computer

The Amiga 600, also known as the A600, is a home computer that was introduced at the CeBIT show in March 1992. The A600 is Commodore International's final model based on the Motorola 68000 CPU and the ECS chipset. It is essentially a redesign of the Amiga 500 Plus, with the option of an internal hard disk drive and a PCMCIA port. A notable aspect of the A600 is its small size. Lacking a numeric keypad, the A600 is only slightly larger than a standard PC keyboard. It shipped with AmigaOS 2.0, which was generally considered more user-friendly than earlier versions of the operating system.

Expansion card a printed circuit board that can be inserted into an electrical connector, or expansion slot on a computer motherboard, backplane or riser card to add functionality to a computer system via the expansion bus

In computing, the expansion card, expansion board, adapter card or accessory card is a printed circuit board that can be inserted into an electrical connector, or expansion slot, on a computer motherboard, backplane or riser card to add functionality to a computer system via the expansion bus.

Amiga 2000 home computer

The Amiga 2000, or A2000, is a personal computer released by Commodore in March 1987. It was introduced as a "big box" expandable variant of the Amiga 1000 but quickly redesigned to share most of its electronic components with the contemporary Amiga 500 for cost reduction. Expansion capabilities include two 3.5" drive bays and one 5.25" bay that can be used by a 5.25" floppy drive, a hard drive, or CD-ROM once they became available.

Chip RAM is a commonly used term for the integrated RAM used in Commodore's line of Amiga computers. Chip RAM is shared between the central processing unit (CPU) and the Amiga's dedicated chipset. It was also, rather misleadingly, known as "graphics RAM".

Amiga 4000 Commodore computer

The Commodore Amiga 4000, or A4000, is the successor of the A2000 and A3000 computers. There are two models, the A4000/040 released in October 1992 with a Motorola 68040 CPU, and the A4000/030 released in April 1993 with a Motorola 68EC030.

The Mindset, released in spring 1984, was an Intel 80186-based MS-DOS personal computer. Unlike other IBM PC compatibles of the time, it had custom graphics hardware supporting 16 simultaneous colors, and hardware-accelerated drawing capabilities including a blitter which allowed it to update the screen 50 times as fast as a CGA adaptor in a standard PC. The basic unit was priced at US$1,798. It was conceptually similar to the more successful Commodore Amiga released over a year later.

This is a list of models and clones of Amiga computers.

The following history of the Amiga documents the development and commercial history of the Amiga, a home computer product line manufactured from the middle 1980s up to today.

Amiga emulation refers to the activity of emulating a Commodore Amiga computer system using another computer platform. Most commonly, a user will emulate the Amiga using modern platforms such as Wintel or Macintosh. This allows Amiga users to use their existing software, and in some cases hardware, on modern computers.

The Amiga computer can be used to emulate several other computer platforms, including legacy platforms such as the Commodore 64, and its contemporary rivals such as the IBM PC and the Macintosh.

Minimig

Minimig is an open source re-implementation of an Amiga 500 using a field-programmable gate array (FPGA).

Amiga 4000T tower version of the A4000 computer

The Amiga 4000T, also known as A4000T, is a tower version of Commodore's A4000 personal computer. Using the AGA chipset, it was originally released in small quantities in 1994 with a 25 MHz Motorola 68040 CPU, and re-released in greater numbers by Escom in 1995, after Commodore's demise, along with a new variant which featured a 50 MHz Motorola 68060 CPU. Despite the subsequent demise of Escom, production was continued by QuikPak in North America into at least 1997.

The Amiga 1200, or A1200, is Commodore International's third-generation Amiga computer, aimed at the home computer market. It was launched on October 21, 1992, at a base price of £399 in the United Kingdom and $599 in the United States.

Sam440ep

Sam440, also known by Sam or its codename Samantha, is a line of modular motherboards produced by the Italian company ACube Systems Srl. The Sam440ep version is a motherboard based on the PowerPC 440EP system-on-a-chip processor which includes a double-precision FPU. It is made by AMCC. Their primary targets are the industrial and embedded markets, running operating systems such as Linux and AmigaOS 4.

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