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
Answer:A
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
Explanation: 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.