Identify the additional transfer mode in the Intel 8237?(a) single transfer mode(b) demand transfer mode(c) verify transfer mode(d) block transfer modeThe question was asked at a job interview.This intriguing question comes from Implementation of DMA topic in portion Basic Peripherals of Embedded Systems

Identify the additional transfer mode in the Intel 8237?(a) single tra

1.	Identify the additional transfer mode in the Intel 8237?(a) single transfer mode(b) demand transfer mode(c) verify transfer mode(d) block transfer modeThe question was asked at a job interview.This intriguing question comes from Implementation of DMA topic in portion Basic Peripherals of Embedded Systems
Answer» The correct choice is (c) verify transfer mode To explain: In addition to the FOUR main transfer mode, there is a verify transfer mode which is used WITHIN the PC to create dummy addresses which are used for REFRESHING the DRAM.

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