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Computer Fundamentals - Section 2 Multiple Questions and Answers.
| 11. | Port C of 8255 can function independently as | ||
| A. | input port | ||
| B. | output port | ||
| C. | either input or output ports | ||
| D. | both input and output ports | ||
| 12. | All the functions of the ports of 8255 are achieved by programming the bits of an internal register called | ||
| A. | data bus control | ||
| B. | read logic control | ||
| C. | control word register | ||
| D. | None | ||
| 13. | The data bus buffer is controlled by | ||
| A. | control word register | ||
| B. | read/write control logic | ||
| C. | data bus | ||
| D. | None | ||
| 14. | The input provided by the microprocessor to the read/write control logic is | ||
| A. | RESET | ||
| B. | A1 | ||
| C. | WR(ACTIVE LOW) | ||
| D. | All of these | ||
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