Editing Amiga Enhanced Chip Set

{{Short description|Amiga chipset}}
The '''Enhanced Chip Set''' ('''ECS''') is the second generation of the [[Amiga]] [[computer]]'s chipset, offering minor improvements over the [[Original Amiga chipset|original chipset]] (OCS) design. ECS was introduced in 1990 with the launch of the [[Amiga 3000]]. Another version was developed around 1994 but was unreleased due to Commodore International filing for bankruptcy.<ref>{{Cite web |last=Roller |first=Joshua |date=2022-06-08 |title=Amiga (1988) |url=https://www.computer.org/publications/tech-news/chasing-pixels/amiga-1988/ |access-date=2024-04-22 |website=IEEE Computer Society |language=en-US}}</ref> Amigas produced from 1990 onwards featured a mix of OCS and ECS chips, such as later versions of the [[Amiga 500]] and the [[Commodore CDTV]].<ref>{{Cite book |last=Koh |first=Harvey |url=https://books.google.com/books?id=uyJOAAAAIBAJ&dq=Amiga+Enhanced+Chip+Set&pg=PA58&article_id=5936,1336316 |title=New range of Amigas on the way |date=1993-02-03 |publisher=New Straits Times |pages=15 |language=en}}</ref> Other ECS models were the [[Amiga 500+]] in 1991<ref name=":0">{{Cite book |last=Choon Wee |first=Lim |url=https://books.google.com/books?id=wLRUAAAAIBAJ&dq=Amiga+Enhanced+Chip+Set&pg=PA37&article_id=4570,1245697 |title=Enter the Amiga 500 Plus |date=1992-04-23 |publisher=New Straits Times |pages=20–21 |language=en}}</ref> and lastly the [[Amiga 600]] in 1992.

== Features ==
The enhanced chip set had two new chips, the 8375 HR [[MOS Technology Agnus|Agnus]] and 8373 HR [[Amiga Original Chip Set#Denise|Denise]].<ref name=":1">{{Cite web |title=The Amiga Museum » The ECS Chipset… |url=https://theamigamuseum.com/the-hardware/the-ecs-chipset/ |access-date=2024-04-22}}</ref> The ECS Denise chip offers ''Productivity'' VGA output (640×480 non-interlaced) and ''SuperHiRes'' (1280×200 or 1280×256) display modes (also available in interlaced mode), which are however limited to only 4 bits on-screen colors. The ''Productivity'' output required a [[Multisync monitor|multi-sync monitor]]. It also allowed for a greyscale resolution of 1008 x 800 pixels with the A2024 monitor.<ref name=":0" />

Some Amigas, such as the [[Amiga 500]] and the [[Amiga 2000]] came with the ECS version of the Agnus chip but the original chipset version (OCS) of the Denise chip. It is possible to upgrade one or both of them to obtain partial or full ECS functionality by replacing OCS chips with ECS versions. Not all OCS chipset computers were upgradable, some such as the Amiga 2000-A and the [[Amiga 1000]] had different Agnus sockets.<ref name=":1" />

ECS was followed by the third generation [[Advanced Graphics Architecture|AGA]] chipset with the launch of the [[Amiga 4000]] and [[Amiga 1200]] in 1992.
{{Portal|Amiga
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==See also==
* [[Amiga custom chips]]
* [[Amiga Ranger Chipset]]
* [[Advanced Graphics Architecture]]
* [[Amiga Advanced Architecture chipset]]
* [[AA+ Chipset]]
* [[Hombre chipset]]

== References ==
{{Reflist}}{{Amiga hardware}}

[[Category:Amiga chipsets]]
[[Category:Graphics chips]]
[[Category:MOS Technology integrated circuits]]
[[Category:Sound chips]]
[[Category:AmigaOS]]

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