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When a subprocessor wants to communicate with the bus window, it informs the main processor to

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When a subprocessor wants to communicate with the bus window, it informs the main processor to

(a) enable control buffer

(b) storage buffer

(c) disable tristate buffer

(d) translation look aside buffer

The question was posed to me in quiz.

Question is from Design of a PC Based Multimicroprocessor System in section Multimicroprocessor Systems of Microprocessor

1 Answer

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by (49.2k points)
Right option is (c) disable tristate buffer

For explanation I would say: An 8255 IO card is used to control the tristate buffers that provide isolation. When a subprocessor wants to communicate with the bus window, it informs the main processor to disable tristate buffer.

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