High Quality Content by WIKIPEDIA articles! Chip RAM is the name given to RAM in the Amiga computer that could be accessed by the Amiga Original chipset as well as the CPU. The custom chipset was able to perform DMA transfers to and from this RAM, and would even lock out the CPU while doing so. By default, most Amiga computers only came with chip RAM, but could be expanded with RAM (called Fast RAM) that only the CPU could access, even when the custom chipset was simultaneously accessing chip RAM. The amount of chip RAM varied between different Amiga models, although generally newer models had more chip RAM than older ones. The original Amiga 1000 was the only model to only have 256 kilobytes of chip RAM on the motherboard; it was expanded to 512 KB by the addition of a daughterboard under a cover in the centre front of the machine. Its more popular successors, the Amiga 500 and Amiga 2000, had 512 kilobytes. The Amiga 500 Plus, Amiga 600, CDTV, later versions of the A2000, and the Amiga 3000 had a full megabyte of chip RAM, and the last models, the Amiga 1200, Amiga CD32, and Amiga 4000, had two megabytes. All models, except the A1000, were upgradable to 2 MB of Chip RAM.

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