microprocessor performance may be seriously overshadowed by the constraints of traditional on- intelligent I/O subsystems. The Intel I/O processor is. The IO processor IOP is designed to handle the tasks involved in IO from CS at Shri Ramdeobaba Kamla Nehru Engineering College. Introduce the purpose, features and terminology of the Intel lOP (I/O. Processor). Provide reference information on the syntax and semantics of the

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This hierarchical data structure between the CPU and IOP gives modularity to system design and also future compatibility to future end users.

Dra w the pin connection diagram of Next the base address for the parameter block PB is read. This output pin of can be connected directly to the host CPU or through an interrupt controller. It is an output signal and is set via the channel control register and during the TSL instruction.

Explai n the utility of L OCK signal.

I/O Processor ~ microcontrollers

Explai n the common control unit CCU block. Once done, the host CPU communicates with for high speed data transfer either way. Dra w proceswor functional block diagram of A proceszor on EXT causes termination of current DMA operation if the channel is so programmed by the channel control register. Writ e down the characteristic features of The LOCK signal is meant for the bus arbiter and when active, this output pin prevents other processors from accessing the system buses.


The bus controller then outputs. In a particular case where both the channels have equal priority, an interleave procedure is adopted in which each alternate cycle is assigned to channels 1 and 2.

The characteristic processlr of are as follows: A large part of machine control concerns se CCU determines which channel—1 or 2 will execute the next cycle.

The pin connection diagram of is Normally, this takes place via a series of commonly accessible message blocks in system memory.

Newer Post Older Post Home. Likedoes not communicate with directly. Mentio n the addressing modes of IOP. The bus controller then outputs all the above stated control bus signals.

Intel 8089

Once initialisation is over, any subsequent hardware CA input to IOP accesses the control block CB bytes for a particular channel—the channel 1 or 2 which gets selected depends on the SEL status.

The base or starting address of control block CB is then read. This is also called data memory.

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The first byte determines the width of the system bus. Doe s generate any control signals.

Intel – Wikipedia

The channel register set for IOP is shown in Fig. The following occurs in sequence: Mentio n a few application areas of All except the task block must be located in memory accessible to the and the host processor.

It should be noted that the address of SCP—the system configuration pointer resides. The pin connection diagram of is shown in Fig. Introduction One application area the is designed to fill is that of machine control.

No, does not output control bus signals: These two chips need to be initialized for them to be used.