Amiga 500+

Amiga 500+

Infobox computer
Photo =
Name = Commodore Amiga 500 Plus
Type = Home computer
Released = 1991
Discontinued = 1992
Processor = Motorola 68000 @ nowrap|7.16 MHz nowrap|7.09 MHz (PAL)
Memory = 1 MB
OS = Amiga OS 2.04

The Commodore Amiga 500 Plus [The case badge reads "Commodore A-500 Plus" [http://www.abc80.net/pics/a500_plus1.jpg] , with "Amiga" embossed elsewhere. However, as with the Amiga range in general, Commodore do not appear to have been overly concerned with naming consistency, the [http://www.amigau.com/aig/bundles/a500plus_box.html packaging] being one example of this.] (often A500 Plus or simply A500+) is an enhanced version of the original Amiga 500 computer. It was notable for introducing new versions of Kickstart and Workbench, and for some minor improvements in the custom chips, known as the Enhanced Chip Set (or ECS).

Introduction

The A500+ was released in several markets (including many European countries), but was never sold officially in the U.S. [ [http://groups.google.com/group/comp.sys.amiga.hardware/browse_thread/thread/febef3c8e99dd24e/193cd363b655ebcb?q=%22a500+plus%22+%22sold+in%22&rnum=1&hl=en#193cd363b655ebcb] ]

Although officially introduced in 1992, some A500 Plus units had already been sold (masquerading as A500 models, and with no prior announcement) during late 1991. It has been speculated that Commodore had already sold out the remaining stocks of A500s, before the run up to the profitable Christmas sales period. In order to make enough A500s before Christmas, Commodore used stocks of the new 8A revision motherboards destined for the A500+. Many users were unaware that they were purchasing anything other than a standard A500. Although the A500+ was an improvement to the A500, it was minor, making it the shortest lived Amiga model. It was discontinued and replaced by the Amiga 600 in summer 1992.

Reason for design

Commodore created the A500+ for a couple of reasons. The first was cost reduction; minor changes were made to the motherboard to make it cheaper to produce. It was also so that Commodore could introduce the new version of the Amiga Operating system, 2.04.

Due to the new Kickstart, quite a few popular games (such as SWIV, Treasure Island Dizzy and Lotus Esprit Turbo Challenge) failed to work on the A500+, and some people took them back to dealers demanding an original Kickstart 1.3 A500. This problem was solved by third-parties who produced Kickstart ROM switching boards, that could allow the A500+ to be downgraded to Kickstart 1.2 or 1.3. It also encouraged game developers to use better programming habits, which was important since Commodore already had plans for the introduction of the next-generation A1200 computer. A program, Relokick, was also released (and included with an issue of CU Amiga) which loaded a Kickstart 1.3 ROM image into memory and booted the machine into Kickstart 1.3, allowing incompatible software to run.

Technical specifications

* Motorola 68000 CPU running at nowrap|7.09 MHz (PAL) / nowrap|7.16 MHz (NTSC), like its predecessor.
* 1 MB of Chip RAM (Very early versions came with 512 KiB)
* Kickstart 2.04 (v37.175)
* Workbench 37.67 (release 2.04)
* Built in battery backed RTC (Real Time Clock) (lacking in the A500)
* Full ECS Chipset including new version of the Agnus chip and Denise chip.

Footnotes


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Amiga 500+ — Тип Персональный компьютер Выпущен …   Википедия

  • Amiga 500 — Hersteller …   Deutsch Wikipedia

  • Amiga 500 — Тип Персональный компьютер Выпущен …   Википедия

  • Amiga 500+ — L A500+, aussi appelé Amiga 500+, est un ordinateur Amiga, principalement une version étendue de l A500. Commodore International créa l Amiga 500+ pour deux raisons. La première était la réduction des coûts ; des modifications mineures… …   Wikipédia en Français

  • Amiga 500 — Commodore Amiga 500 An Amiga 500 computer system, with 1084S RGB monitor and second A1010 floppy disk drive Release date 1987 Discontinued 1991 …   Wikipedia

  • Amiga 500 — Pour les articles homonymes, voir A500. Amiga 500 Amiga 500 avec écran et lecteur de disquette additionnel Fabricant …   Wikipédia en Français

  • Amiga 500 Plus — Amiga 500 mit 1084S RGB Monitor, Maus und externem A1010 Diskettenlaufwerk. Auf dem Bildschirm ist die Workbench zu sehen. Der Amiga 500 ist der meistverkaufte Amiga Computer von Commodore. Er wurde 1987 auf der CeBit zusammen mit dem Amiga 2000… …   Deutsch Wikipedia

  • Amiga 500 Plus — Commodore Amiga 500 Plus Release date 1991 Discontinued 1992 Media 880 kB floppy disks Operating system …   Wikipedia

  • Amiga 500 Plus — …   Википедия

  • Commodore Amiga 500 — Una Commodore Amiga 500 completa Tipo Computador personal Comercializado 1987 …   Wikipedia Español


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.