Enhanced chip set
ECS ( E nhanced C hip S et ) is compared with the previous model OCS improved chipset , the computers in the Amiga 500plus , A600 , A3000 , and in the CDTV was used. It is to be seen as a collective term for the interaction of different coprocessors .
The ECS consists of 3 components:
Big Agnus and Hires Denise are further developments of the original chips Agnus and Denise .
The successor to the ECS chipset for the Amiga was the AGA chipset.
Big / Fat Agnus
The name Agnus is derived from the word address generator. The chip operates as chip RAM - controller and generates the necessary addressing of the DMA channels. It also contains the two coprocessors Blitter and Copper and generates the various video synchronization signals .
Compared to the OCS , these Agnus versions could address more chip RAM, namely 1 or 2 MB.
Hires Denise
The name is derived from the English words Hi gh Res olution D isplay- En from coder. The chip controls the graphics output.
Compared to the OCS , this Denise version was able to display a few higher resolutions ( productivity mode ), but at the expense of the number of colors that could be displayed simultaneously.
Paula
The name Paula is derived from the English words P eripheral and Au dio from. The chip controls the following tasks in the Amiga:
- Input and output control for floppy disk drives
- Sound output
- Query of the analog inputs
This chip has not been changed compared to the OCS and has even been retained in the AGA chipset.
Support and compatibility issues
The ECS was supported from AmigaOS 2.0.
Due to the many changes, some games no longer worked properly. In addition, the changeover to the new chipset took place without much advance notice, which meant that the programmers were not prepared for the changeover and there was consequently very little software with extended functions for the new chipset.
