The Intel386(TM) EX Microprocessors Enhanced DMA and DOS Compatibility

In addition to a fully static, modular Intel386(TM) SX CPU core, one of the many peripheral functions of the Intel386 EX microprocessor is an enhanced Direct Memory Access (DMA) module. In view of the above market segments, the architectural task force had to strike a delicate balance between providing embedded control customers the performance they require and ensuring that the DMA module and its interface to the CPU remain DOS and PC compatible. This article explains "why we chose what we chose" regarding the DMA block.

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