Chapter 5 Memory Organisation 5.1 Introduction The memory unit is an essential component in any digital computer since it is needed for storing programs and data. Main Memory The memory unit that communicates directly with the CPU is called the main memory. Auxiliary Memory Devices that provide backup storage are called auxiliary memory. The most common auxiliary memory devices used in computer systems are magnetic disks and tapes. The part of the computer system that supervises the flow of
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SMS Based Wireless Electronic Notice Board using GSM/CDMA/3G Mobile Phone ABSTRACT Notice Board is primary thing in any institution / organization or public utility places like bus stations‚ railway stations and parks. But sticking various notices day-to-day is a difficult process. A separate person is required to take care of this notices display. This project deals about an advanced hi-tech wireless notice board. The project is built around the ATMEGA8L micro controller from Atmel. This
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Centre Number Candidate Name Candidate Number International General Certificate of Secondary Education CAMBRIDGE INTERNATIONAL EXAMINATIONS COMPUTER STUDIES PAPER 1 0420/1‚ 0421/1 MAY/JUNE SESSION 2002 2 hours 30 minutes Candidates answer on the question paper. No additional materials are required. TIME 2 hours 30 minutes INSTRUCTIONS TO CANDIDATES Write your name‚ Centre number and candidate number in the spaces at the top of this page. Answer all questions. Write your
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to the data. R0 and R1 are the only registers used in this addressing mode 17. All ports P0 to P3 are bit addressable 18. 16 bytes of the internal ram are bit addressable. The locations are 20H to 2FH 24. P0-80H-87H 25. P1-90H-97H 26. P2-A0H-A7H 27. P3-B0H-B7H 28. PCON-98H-98FH 29. TCON-88H-8FH 35. CLR.PSW.& 37. MOV A‚ D0H (D0H is the address of PSW ANL A‚ FBH (Mask the unused bits and test the ones needed) MOV P1‚ A (Display for the user on the board) Chapter 4 20. CPL P1.2
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is deleted 2. What are the possible values for a bit? –States 1 or 0 Task 2: 1. What is the highest number that can be stored in a byte? – 8 bytes as 11111111 or 255 in decimal. 2. 0x12 is an example of what type of number? – Hexadecimal Task 3: 5. 11001000 6. Binary 8. C8 9. 0xC8 12. 7 13. 01100100 14. 0110 0100 16. 7 17. 110 18. 0110 19. First set of nibble is equivalent to the binary of 7 Task 4: 1. What is an instruction? – A sequence of bits understood by the processor to signal a certain action
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budgeting‚ by your own product. With that being said this industry includes cosmetics‚ beauty supplies‚ perfumes‚ personal grooming and anything else a lady needs to look and feel pretty in their own eyes. The following information is just a few tid bits about the industry and how it works with the recession. www.ehow.com “The beauty industry includes cosmetics‚ beauty supplies. But products are also part of the industry that markets to women about being beautiful. The diet section of the beauty
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Computer Architecture and Assembly Language – Midterm 2011 1. In instruction ADC the operands can be o Two register only o Two register and one memory location o CF and two other operands o ZF and two other operands 2. After the execution of instruction “RET” o SP is incremented by 2 o SP is decremented by 2 o SP is incremented by 1 o SP is decremented by 1 3. The extended ASCII has o 64 characters o 128 characters o 256 characters o 502 characters 4. The second byte in
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Bitstream BITSTREAM Background of Company: Bit stream is a $30 million company‚ founded in 1981. The sales were from Retail and OEM. The new president Mr. Jim Sole found opportunity in network print manager. To manage the new business a new person is to be hired. Problems in the Case: The main problem in the case is selection of suitable candidate for the post generated due to new opportunity found in Network printing business. There are four suitable candidates who applied for the post. Analysis
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motherboard‚ or has evolved into using EEPROM. There are still CMOS that use a battery on the mother board but EEPROM is more popular today. CMOS has since evolved from using a RAM to using EEPROM. It’s a long name for a small chip that holds bits of data code that can be rewritten and erased by an electrical charge‚ one byte at a time. Its data cannot be selectively rewritten; the entire chip must be erased and rewritten to update its contents.
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alphanumeric character data. Provide at least three reasons to support your answer. Computer memory has two dimensions a length and a width. A single memory chip may have a length of one million memory cells (also known as addresses)‚ each of which are 8 bits‚ or 1 byte‚ wide. Although the chip is 1 byte wide‚ the memory controller may access several bytes at once. When several bytes are joined together‚ they form a word. A word is usually 2‚ 4 or 8 bytes long. If you have a memory controller that only
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