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Original Power Mac G4 Developer Note
DMA Support
The KeyLargo IC provides DB-DMA (descriptor-based direct memory access) support for the following I/O channels:
Ultra DMA/66 interface
EIDE interface
communication slot interface
DAV channel to the sound IC
The DB DMA system provides a scatter-gather process based on memory-resident data structures that describe the data transfers. The DMA engine is enhanced to allow bursting of data files for improved performance.
© 2000 Apple Computer, Inc. (Last Updated 13 Jan 00)