1. Which microprocessor pins are used to request and acknowledge a DMA transfer? 2. A DMA read transfers data from _________ to  _________. 3. The DMA controller selects the memory location used for a DMA transfer through what bus signals? 4. What is a memory-to-memory DMA transfer? 5. Describe the effect on the microprocessor and DMA controller when the HOLD and HLDA pins are at their logic 0 levels. 6. If the 8237 DMA controller is decoded at I/O ports 2000H -200FH, what ports are used to program channel 1? 7. How many bytes can be transferred by the 8237 DMA controller? 8. Write a sequence of instructions that transfers data from memory to an external I/O device by using channel 3 of the 8237. The memory area to be transferred is at location 20000H -20FFFH. 9. The 3 ½” disk is known as a(n) __________ floppy disk. 10. A track is divided into sections of data called __________. 11. Why is NRZ recording used on a disk memory system? 12. Draw the timing diagram generated to write a 1001010000 using RLL encoding 13. Why must the heads on a hard disk be parked? 14. What is a WORM? 15. How much data can be stored on a common DVD, an HD-DVD, and a Blu-ray DVD? 16. What are the three primary colors of light? 17. What is a pixel? 18. What 8086/8088 signal is used to select the direction of the data flows through the 74LS245 bidirectional bus buffer? 19. How much time is allowed for memory access when the 8086/8088 is operated with a 5MHz clock? 20. What are the five major keywords in VHDL for the five major logic functions (AND, OR, NAND, NOR, and invert)? 21. Write the software required to place a logic 1 on the PC7 pin of the 82C55during strobed input operation. 22. How many ICWs are needed to program the 8259A when operated as a single master in a system? 23. Explain how a TTL RGB monitor can display 16 different colors. 24. Explain how an analog RGB monitor can display an infinite number of colors. 25. If a video system uses a vertical frequency of 60 Hz and a horizontal frequency of 32,400 Hz, how many raster lines are generated?

Looking for solution of this Assignment?

WHY CHOOSE US?

We deliver quality original papers

Our experts write quality original papers using academic databases.  

Free revisions

We offer our clients multiple free revisions just to ensure you get what you want.

Discounted prices

All our prices are discounted which makes it affordable to you. Use code FIRST15 to get your discount

100% originality

We deliver papers that are written from scratch to deliver 100% originality. Our papers are free from plagiarism and NO similarity

On-time delivery

We will deliver your paper on time even on short notice or  short deadline, overnight essay or even an urgent essay