Give block diagram of DMA controller. How does the CPU initialize the DMA transfer? 5m Jun2008 Device Controller A device controller need not necessarily control a single device. It can usually control multiple I/O devices. It comes in the form of an electronic circuit board that plugs directly into the system bus, and there is… Read More »
Explain briefly the working of two-pass assembler. 5m Jun2008 Two-pass assembler: Assemblers typically make two or more passes through a source program in order to resolve forward references in a program. A forward reference is defined as a type of instruction in the code segment that is referencing the label of an instruction, but… Read More »
List three differences between Dynamic RAM and Static RAM. 3m Jun2008 Static RAM ü SRAM uses transistor to store a single bit of data ü SRAM does not need periodic refreshment to maintain data ü SRAM’s structure is complex than DRAM ü SRAM are expensive as compared to DRAM ü SRAM are faster than… Read More »
Draw logic circuit for a converter that converts 4 bit binary input to its equivalent BCD number. 8m Jun2008 A four bit number can be any number value between 0 to 15 i.e. 0 to F in Hexadecimal. BCD is a number which is represented in binary as a decimal number hence it can have… Read More »
Write an 8086 assembly language program that finds the smallest and the second smallest number from a list of 10 numbers stored in memory. 7m Jun2008 To understand program for Largest or Smallest in an array in detail Please Click this link below http://cssimplified.com/computer-organisation-and-assembly-language-programming/an-assembly-program-for-finding-the-largest-number-in-array-of-10-elements DATA SEGMENT ARR DB 5,3,7,1,9,2,6,8,4 LEN DW $-ARR SMALL DB ? SECOND… Read More »
Assume a computer having 64 word RAM and cache memory of 8 blocks. Where can we find memory location 25 in cache when the following are used: (i) Direct mapping (ii) Associative mapping (iii) 2-way set associative (2 blocks per set) mapping Assume 1 word – 16 bits, block size = 32 bits. 9m Jun2008 … Read More »
Simplify the following Boolean function in SOP form using K-Map: F (A, B, C, D) = Σ ( 0,1, 2, 4, 6, 8, 9, 12, 14, 15 ). Also, draw the simplified logic circuit diagram. 8m Jun2008 K-Map for F is: Thus, the simplified equations for F (A, B, C, D) = Σ (0,1, 2, 4, 6,… Read More »
What are the differences between structure and union? Give one illustrative example of usage of the union. 8m Jun2008 Structure in C programming Structure is commonly referred to as a user-defined data type. C’s structures allow you to store multiple variables of any type in one place (the structure). A structure can contain any of… Read More »
Assume a computer has 32 words RAM each having a word of 16 bits and a cache memory of 4 blocks, with each block having 16 bits. Where can we find a main memory address 21 in the cache (if it exists) if (i) Set associative mapping is used? (ii) Direct mapping is used? (iii)… Read More »
Seek time on a hard disk is 50 ms. it rotates at a speed of 3000 rotations/sec. Each track on the disk has 100 sectors. Find the average access time for the disk. 4m Dec2007 Disk Rotation Speed = 3000 rps. (i.e. 180000 rpm) Sectors per Track = 100 sectors Seek time = 50 millisecond … Read More »