![]() Apart from the graphics data fetches, AGA still operates on 16-bit data only, meaning that a lot of bandwidth is wasted during register accesses and copper and blitter operations. Other features added to AGA over ECS were super hires smooth scrolling and 32-bit fast page memory fetches to supply the graphics data bandwidth for 8 bitplane graphics modes and wider sprites.ĪGA was an incremental upgrade, rather than the dramatic upgrade of the other chipset that Commodore had begun in 1988, AAA, lacking many features that would have made it competitive with other graphic chip sets of its time. ![]() ![]() The palette for the AGA chipset has 256 entries from 16777216 colors (24-bit), whereas previous chip sets (OCS and ECS) only allowed 32 colors out of 4096 (64 colors in EHB mode). This allows for 256 colors in indexed display modes and 262144 colors (18- bit) in HAM-8 (Hold-And-Modify) modes. The name was later changed to AGA for the European market to reflect that it largely improved the graphical subsystem, and to avoid trademark issues.ĪGA is able to display graphics modes with a depth of up to 8 bit per pixel. AGA was codenamed the Pandora chipset by Commodore International internally.ĪGA was originally called AA for Advanced Architecture in the United States. Advanced Graphics Architecture ( AGA) is the third generation Amiga graphic chip set, first used in the Amiga 4000 in 1992.
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