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Amiga "computer" A range of home computers first released by {Commodore Business Machines} in early 1985 (though they did not design the original - see below). Amigas were popular for {games}, {video processing}, and {multimedia}. One notable feature is a hardware {blitter} for speeding up graphics operations on whole areas of the screen. The Amiga was originally called the Lorraine, and was developed by a company named "Amiga" or "Amiga, Inc.", funded by some doctors to produce a killer game machine. After the US game machine market collapsed, the Amiga company sold some {joysticks} but no Lorraines or any other computer. They eventually floundered and looked for a buyer. Commodore at that time bought the (mostly complete) Amiga machine, infused some money, and pushed it through the final stages of development in a hurry. Commodore released it sometime[?] in 1985. Most components within the machine were known by nicknames. The {coprocessor} commonly called the "Copper" is in fact the "{Video} Timing Coprocessor" and is split between two chips: the instruction fetch and execute units are in the "Agnus" chip, and the {pixel} timing circuits are in the "Denise" chip (A for address, D for data). "Agnus" and "Denise" were responsible for effects timed to the {real-time} position of the video scan, such as midscreen {palette} changes, {sprite multiplying}, and {resolution} changes. Different versions (in order) were: "Agnus" (could only address 512K of {video RAM}), "Fat Agnus" (in a {PLCC} package, could access 1MB of video RAM), "Super Agnus" (slightly upgraded "Fat Agnus"). "Agnus" and "Fat Agnus" came in {PAL} and {NTSC} versions, "Super Agnus" came in one version, jumper selectable for PAL or NTSC. "Agnus" was replaced by "Alice" in the A4000 and A1200, which allowed for more {DMA} channels and higher bus {bandwidth}. "Denise" outputs binary video data (3*4 bits) to the "Vidiot". The "Vidiot" is a hybrid that combines and amplifies the 12-bit video data from "Denise" into {RGB} to the {monitor}. Other chips were "Amber" (a "flicker fixer", used in the A3000 and Commodore display enhancer for the A2000), "Gary" ({I/O}, addressing, G for {glue logic}), "Buster" (the {bus controller}, which replaced "Gary" in the A2000), "Buster II" (for handling the Zorro II/III cards in the A3000, which meant that "Gary" was back again), "Ramsey" (The {RAM} controller), "DMAC" (The DMA controller chip for the WD33C93 {SCSI adaptor} used in the A3000 and on the A2091/A2092 SCSI adaptor card for the A2000; and to control the {CD-ROM} in the {CDTV}), and "Paula" ({Peripheral}, Audio, {UART}, {interrupt} Lines, and {bus Arbiter}). There were several Amiga chipsets: the "Old Chipset" (OCS), the "Enhanced Chipset" (ECS), and {AGA}. OCS included "Paula", "Gary", "Denise", and "Agnus". ECS had the same "Paula", "Gary", "Agnus" (could address 2MB of Chip RAM), "Super Denise" (upgraded to support "Agnus" so that a few new {screen modes} were available). With the introduction of the {Amiga A600} "Gary" was replaced with "Gayle" (though the chipset was still called ECS). "Gayle" provided a number of improvments but the main one was support for the A600's {PCMCIA} port. The AGA chipset had "Agnus" with twice the speed and a 24-bit palette, maximum displayable: 8 bits (256 colours), although the famous "{HAM}" (Hold And Modify) trick allows pictures of 256,000 colours to be displayed. AGA's "Paula" and "Gayle" were unchanged but AGA "Denise" supported AGA "Agnus"'s new screen modes. Unfortunately, even AGA "Paula" did not support High Density {floppy disk drives}. (The Amiga 4000, though, did support high density drives.) In order to use a high density disk drive Amiga HD floppy drives spin at half the rotational speed thus halving the data rate to "Paula". Commodore Business Machines went bankrupt on 1994-04-29, the German company {Escom AG} bought the rights to the Amiga on 1995-04-21 and the Commodore Amiga became the Escom Amiga. In April 1996 Escom were reported to be making the {Amiga} range again but they too fell on hard times and {Gateway 2000} (now called Gateway) bought the Amiga brand on 1997-05-15. Gateway licensed the Amiga operating system to a German hardware company called {Phase 5} on 1998-03-09. The following day, Phase 5 announced the introduction of a four-processor {PowerPC} based Amiga {clone} called the "{pre\box}". Since then, it has been announced that the new operating system will be a version of {QNX}. On 1998-06-25, a company called {Access Innovations Ltd} announced {plans (http://micktinker.co.uk/aaplus.html)} to build a new Amiga chip set, the {AA+}, based partly on the AGA chips but with new fully 32-bit functional core and 16-bit AGA {hardware register emulation} for {backward compatibility}. The new core promised improved memory access and video display DMA. By the end of 2000, Amiga development was under the control of a [new?] company called {Amiga, Inc.}. As well as continuing development of AmigaOS (version 3.9 released in December 2000), their "Digital Environment" is a {virtual machine} for multiple {platforms} conforming to the {ZICO} specification. As of 2000, it ran on {MIPS}, {ARM}, {PPC}, and {x86} processors. {(http://amiga.com/)}. {Amiga Web Directory (http://cucug.org/amiga.html)}. {amiCrawler (http://amicrawler.com/)}. Newsgroups: {news:comp.binaries.amiga}, {news:comp.sources.amiga}, {news:comp.sys.amiga}, {news:comp.sys.amiga.advocacy}, {news:comp.sys.amiga.announce}, {news:comp.sys.amiga.applications}, {news:comp.sys.amiga.audio}, {news:comp.sys.amiga.datacomm}, {news:comp.sys.amiga.emulations}, {news:comp.sys.amiga.games}, {news:comp.sys.amiga.graphics}, {news:comp.sys.amiga.hardware}, {news:comp.sys.amiga.introduction}, {news:comp.sys.amiga.marketplace}, {news:comp.sys.amiga.misc}, {news:comp.sys.amiga.multimedia}, {news:comp.sys.amiga.programmer}, {news:comp.sys.amiga.reviews}, {news:comp.sys.amiga.tech}, {news:comp.sys.amiga.telecomm}, {news:comp.Unix.amiga}. See {aminet}, {Amoeba}, {bomb}, {exec}, {gronk}, {guru meditation}, {Intuition}, {sidecar}, {slap on the side}, {Vulcan nerve pinch}. (2003-07-05)

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