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- Amiga 600 had a compact look, PCMCIA slot for expansion and IDE (ATA) hard disk connector (and sometimes ready cradle) inside. To use it, a 1:1 cable between two (2mm raster) small IDE connectors was needed. Amiga 600 was more expensive, but it gave much better computing.
- Amiga Expansion Bus Zorro II pinout. Pinouts Computer buses and slots connectors obsolete computers pinouts. Unknown connector. Ask a question; Comment; Edit; Submit New; These are the connections found at the side of the Amiga computers. This Bus is like most Buses at this time a extension on the CPU Bus. Click for details.
The Amiga 500 has a 'trap-door' slot on the underside for a RAM upgrade (typically of 512 KiB). This extra RAM is classified as 'fast' RAM, but is sometimes referred to as 'slow' RAM: due to the design of the expansion bus, it is actually on the chipset bus. Such upgrades usually include a.
Type | Personal computer |
---|---|
Release date | March 1987; 32 years ago |
Introductory price | USD 1495 (1987) USD 3,400 (2020 equivalent)[1] |
Discontinued | 1991 |
Operating system | Amiga OS 1.2/1.3 or 2.0 |
CPU | Motorola 68000@ 7.16 MHz (NTSC)7.09 MHz (PAL) |
Memory | 1 MB(9 MB maximum) |
Predecessor | Amiga 1000 |
Successor | Amiga 3000 |
The Amiga 2000, or A2000, is a personal computer released by Commodore in March 1987.[2][3][4] 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 (one of which is used by the included floppy drive) and one 5.25' bay that can be used by a 5.25' floppy drive (for IBM PC compatibility), a hard drive, or CD-ROM once they became available.
The Amiga 2000 is the first Amiga model that allows expansion cards to be added internally. SCSI host adapters, memory cards, CPU cards, network cards, graphics cards, serial port cards, and PC compatibility cards were available, and multiple expansions can be used simultaneously without requiring an expansion cage like the Amiga 1000 does. Not only does the Amiga 2000 include five Zorro II card slots, the motherboard also has four PC ISA slots, two of which are inline with Zorro II slots for use with the A2088 bridgeboard, which adds IBM PC XT compatibility to the A2000.
The Amiga 2000 was the most versatile and expandable Amiga computer until the Amiga 3000 was introduced three years later.
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- 2Variants
- 3Technical information
- 3.1Specifications
Features[edit]
Aimed at the high-end market, the original Europe-only model adds a Zorro II backplane, implemented in programmable logic, to the custom Amiga chipset used in the Amiga 1000. Later improved models have redesigned hardware using the more highly integrated A500 chipset, with the addition of a gate-array called 'Buster', which integrates the Zorro subsystem.[5] This also enables hand-off of the system control to a coprocessor slot device, and implements the full video slot for add-on video devices.
Like the earlier model, the Amiga 1000, and most IBM PC compatibles of the era, but unlike the Amiga 500, the A2000 comes in a desktop case with a separate keyboard. The case is taller than the A1000 to accommodate expansion cards, two 3.5' and one 5.25' drive bays. The A2000's case lacks the 'keyboard garage' of the Amiga 1000 but has space for five Zorro II expansion slots, two 16-bit and two 8-bit ISA slots, a CPU upgrade slot and a video slot. Unlike the A1000, the A2000's motherboard includes a battery-backed real-time clock.[6]
The Amiga 2000 offers graphics capabilities exceeded among its contemporaries only by the Macintosh II, which sold for about twice the price of a comparably-outfitted Amiga 2000 additionally equipped with the IBM PC Compatible bridgeboard and 5.25' floppy disk drive (which was important for real-world interoperability at this time).[7] Also like the A1000, the A2000 was sold only by specialty computer dealers. It was originally announced at a price of 1495 USD[1]
The A2000 was largely succeeded by the Amiga 3000 in 1990[citation needed]. The 3000 features fewer options for internal expansion than the 2000 models, so Commodore supplemented the Amiga 3000 with the Amiga 3000T in 1991.
Variants[edit]
The Amiga 2000 was designed with an open architecture. Commodore's engineers believed that the company would probably be unsuccessful in matching the rate of system obsolesce and replacement then common in the PC industry, with new models every year or so. Commodore's approach was to build a single system architecture that could span different models. Commodore was so successful at this that Info magazine judged that the A2000 would not become obsolete 'until well after the turn of the century'[8] at the earliest.
The final design was the result of an internal battle within Commodore, which pitted the USA division, who wanted to build a system more like the Amiga 3000 (and 1000), against the German division, which was fresh from the successful introduction of the first Commodore PC-compatible systems and planned to include this capability in the Amiga 2000 from the start.[9] The bottom-line practicality of the German design won out, and the final A2000 shipped with not only Zorro II slots, but a complement of PC standard (for the day) ISA slots.
This architecture was subject to major revisions. The 'B2000-CR' motherboard was the most common, showing up as the first major revision. It was designed by Dave Haynie and Terry Fisher (whose names are printed on the board), and while an A2000 variant, was a redesign of the Amiga 1000 motherboard incorporating some Amiga 500 technological advances to achieve the 'CR': Cost Reduction.
The original Amiga 2000 shipped with just a single floppy drive for storage. This was followed up fairly early by the Amiga 2000/HD, which bundled an Amiga 2090 hard drive controller and a SCSI-based hard drive. In 1988, Commodore shipped the Amiga 2500/20, which added the Amiga 2620 CPU card to the CPU slot, a 14.3 MHz 68020, a 68881 FPU, and a 68851 MMU to the A2000, along with 2 MB of 32-bit-wide memory. The A2000's original 68000 CPU remained installed on the motherboard of these machines, but is not used. In 1989 this model was replaced by the Amiga 2500/30, which added an Amiga 2630 CPU card: 25 MHz 68030 and the 68882 FPU with up to 4 MB of 32-bit memory. The A2630 card can also take a memory expansion daughter card, capable of supporting up to 64 MB of additional memory. Commodore built an in-house prototype of this, but never released one.
Amiga 1500 [edit]
In 1990, Commodore UK sold a variant of the A2000, the A1500, for £999. The model designation was not officially sanctioned by Commodore International. The A1500 shipped with dual floppy drives, and 1 MB of ChipRAM as standard. Initial units came with Kickstart 1.3 (and thus AmigaOS 1.3), though the Original Chipset onboard includes a later Agnus revision allowing the 1MB of ChipRAM. Early machines were bundled with a Commodore 1084SD1 monitor. Later machines came with the ECS chipset and AmigaOS 2.04. The second floppy drive replaces the hard disk drive. The A1500 has no hard disk drive as standard.
As the only significant difference A1500s could be upgraded into A2000/HDs by addition of a hard disk controller (and associated drive).
There was also a replacement case kit for the Amiga 500 made by Checkmate Digital and also called A1500.[10]
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Amiga 2500 [edit]
The Amiga 2500, also known as the A2500, similar to the A1500 is not a distinct model, but simply a marketing name for an Amiga 2000 with a different base configuration. The configuration of an A2500 included a Motorola 68020 or 68030-based accelerator card.[11] The accelerator cards used by the A2500 (the A2620 and A2630) were also available separately as upgrades for the A2000. 68030 versions were referred to as A2500/30.[12]
Because the A2500 has a Motorola 68000 on the motherboard that goes unused, the design is not very cost-effective. A project to replace it with a 68020 on-board began, intending to be a Zorro-II-based 68020 machine, but the project eventually became the Amiga 3000 when Dave Haynie sought to include his new Zorro-III bus.
The A2500 remained in production after the release of the A3000, primarily because the original Video Toaster will not fit in an unmodified A3000 case. Until the release of the Video Toaster 4000, the A2500 was the fastest computer available for use with the Toaster.
A further variant called the A2500UX was also available which was supplied with Commodore Amiga UNIX and tape drive.[13]
Technical information[edit]
The majority of A2000 systems shipped with Commodore's Original Chip Set and 1 MB of RAM (512 KB of 'chip' RAM and 512 KB additional RAM) and either AmigaOS 1.2 or 1.3. Later revisions shipped with the improved Enhanced Chip Set, 1 MB 'chip' RAM and AmigaOS 2.0.[14]
The A2000 shipped with a Motorola 68000 CPU, running at 7.16 MHz (NTSC) or 7.09 MHz (PAL). The CPU can be upgraded to a 68010 by direct replacement. Official and third-party expansion boards, which fit in the CPU expansion slot, feature 68020, 68030, 68040 or 68060 microprocessors. Such upgrades may also accommodate additional RAM, FPUs, MMUs and even SCSI controllers.
Memory capacity varies according to the hardware revision. Certain revisions of the A2000 can be upgraded to accommodate 1 MB of chip RAM by installing an 8372A Agnus chip. Likewise, 2 MB can be accommodated by fitting an 8372B Agnus chip and adding extra memory. There is a practical limit of 8 MB of additional RAM without the use of a CPU expansion card, due to the 68000's 24-bit address bus.
The A2000 brought a new capability to the Amiga line, the Zorro II bus. This expansion bus allows installation of compatible hardware through the AutoConfig standard, such as, graphic, sound, and network cards and Parallel ATA, SCSI and USB controllers.
The ISA slots can be activated by use of a bridgeboard, which connects the Zorro II and ISA buses. Such bridgeboards typically feature on-board IBM PC Compatible hardware, including Intel 80286, 80386 or 80486 microprocessors allowing emulation of an entire IBM-PC system in hardware. The remaining ISA slots can then be used with industry standard hardware of the era, such as, network cards, graphics cards and hard drive controllers. In some A2000 models, the two 8-bit ISA slots can also be upgraded to 16-bit by fitting extension edge connectors.
The video slot presents clocks, all 12-bits of digital video, Genlock signals, and some control lines for use to add-on cards. This allows use of dedicated genlocks, display deinterlacers, and video-switching and effects systems such as NewTek's Video Toaster.
Specifications[edit]
Attribute | Specification[5] |
---|---|
Processor | Motorola 68000 at 7.16 MHz (NTSC) or 7.09 MHz (PAL) |
RAM | 1 MB consisting of either:
Upgradeable to 2 MB 'chip' RAM (some models require hardware modification) |
ROM | 256 or 512 KB Kickstart ROM |
Chipset | Original Chip Set (OCS)[A][B] or Enhanced Chip Set (ECS)[C] |
Video | 12-bit color palette (4096 colors) Graphic modes with up to 32, 64 (EHB mode) or 4096 (HAM mode) on-screen colors:
Graphic modes with up to 16 on-screen colors:
ECS only graphic modes:
|
Audio | 4× 8-bit PCM channels (2 stereo channels) 28 kHz maximum DMAsampling rate (56 kHz in ECS-only modes) |
Internal storage | 3.5' SCSIhard disk drive (A2000HD only) |
Removable storage | 3.5' DDfloppy disk drive (880 KB capacity) |
Audio/video ports | Analog RGB video out (DB-23M) Monochrome composite video out (RCA)[B][C] Here at Top Online Casinos, we have complied the best free spins, no deposit, no wager and exclusive deals available in Canada for 2019. Free spins NO DEPOSIT required. Online casino FREE SPINS will require a minimum deposit and are generally accompanied by a bonus deposit match. https://coconin.netlify.app/canadian-online-casino-free-spins.html. |
Input/output ports | Keyboard port (5 pin DIN) 2× Mouse/Gamepad ports (DE9) |
Expansion slots | 5× 100-pin 16-bit Zorro II slots (AutoConfig) 2× 16-bit ISA slots (requires bridgeboard to activate) |
Operating system | AmigaOS 1.2/1.3 (Kickstart 1.2/1.3 and Workbench 1.2/1.3) or AmigaOS 2.0 (Kickstart 2.04 and Workbench 2.04)[C] |
Other | 2× front accessible 3.5' drive bays 1× front accessible 5.25' drive bay |
Notes[edit]
- ^ Model A (revision 3.0-4.0), 1986
- ^ Model B (revision 4.1-5.0), 1986
- ^ Model C (revision 6.0-6.5), 1991
See also[edit]
Amiga 500 Expansion Port Pinout
References[edit]
- ^ abInfo Magazine Issue 14
- ^The Amiga Legacy, Amiga, Inc.
- ^Amiga history guide, Gareth Knight
- ^Amiga 2000, Lemon Amiga
- ^ abFinkel, Steve (1987), Commodore Amiga A500/A2000 Technical Reference Manual(PDF), Commodore-Amiga, Inc., archived from the original(PDF) on 2012-06-13, retrieved 2011-08-25
- ^Introduction to the Commodore Amiga 2000(PDF), Commodore-Amiga, Inc., 1987, archived from the original(PDF) on 2012-06-13, retrieved 2011-08-25
- ^Info Magazine issue 17, retrieved 30 May 2013
- ^'Info magazine issue 14 (May 1987), page 130'.
- ^'Commodore Amiga 2000 Teardown'. 2011-03-07. Retrieved 2014-12-06.
- ^Checkmate Digital: Checkmate A1500Archived March 14, 2013, at the Wayback Machine
- ^'Amiga 2000'. 2005. Retrieved 26 December 2009.
- ^'Amiga 2500/30'. 2004. Archived from the original on 30 January 2010. Retrieved 26 December 2009.
- ^http://www.bigbookofamigahardware.com/bboah/product.aspx?id=20
- ^Knight, Gareth. 'Commodore Amiga 2000'.
Amiga 500 Expansion Slot Pinout 2
External links[edit]
Expansion Slot Laptop
- amigahistory.co.uk/a2000 – History of the Amiga 2000
Amiga 500 Expansion Slot Pinout Diagram
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