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Assembly Language
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What is the use of modem control unit in 8251?

The modem control unit handles the modem handshake signals to coordinate the communication between the modem and the USART.
Posted By:David Evans      Posted On: Sep 05

Assembly Language
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Give the register organization of 8257?

The 8257 perform the DMA operation over four independent DMA channels. Each of the four channels of 8257 has a pair of two 16-bit registers. DMA address register and terminal count register. Also, there are two common registers for all the channels; ...
Posted By:Anna Schmidt      Posted On: Oct 05

Assembly Language
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What is the function of DMA address register?

Each DMA channel has one DMA address register. The function of this register is to store the address of the starting memory location, which will be accessed by the DMA channel. Thus the starting address of the memory block that will be accessed by th...
Posted By:Jack Bouchard      Posted On: Jan 11

Assembly Language
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What is the use of terminal count register?

Each of the four DMA channels of 8257 has one terminal count register. This 16-bit register is used for ascertaining that the data transfer through a DMA channel ceases or stops after the required number of DMA cycles.
Posted By:Kai Evans      Posted On: Apr 03

Assembly Language
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What is the function of mode set register in 8257?

The mode set register is used for programming the 8257 as per the requirements of the system. The function of the mode set register is to enable the DMA channels individually and also to set the various modes of operation.
Posted By:Isla Hughes      Posted On: Mar 10

Assembly Language
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What is interfacing?

An interface is a shared boundary between the devices which involves sharing information. Interfacing is the process of making two different systems communicate with each other.
Posted By:Abel Fischer      Posted On: Mar 08

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