Explain any five addressing modes used in an 8086 microprocessor, with the help of an example of each. 5m jun2006 The following tree shows the common addressing modes: In general not all of the above modes are used for all applications. However, some of the common areas where compilers of high-level languages use them are:… Read More »
Simplify the following boolean function in POS form using K-maps : F (A, B, C, D) = Σ (0, 2, 4, 5, 6, 8, 10, 13, 15) Also draw a logic diagram using only NAND gates. 5m Dec2005 K-Map for F is: Thus, the simplified equations for F (A, B, C, D) =… Read More »
Find out the errors, if any, in the following, and 5m Dec2005 (i) CMP AX, BX No error since two register operand are allowed for comparison in the permutations shown below. (ii) IDlV AX, CH IDIV works or allows one parameter only and it can either be register or memory only as shown below. corrected… Read More »
What is an interrupt? Explain each of the conditions under which an interrupt occurs 5m Dec2005 Interrupt An interrupt is an external signal that occurs due to an exceptional event. It causes interruption in the execution of current program of CPU. An interrupt may be generated by a number of sources, which may beeither internal… Read More »
Explain the working of the instruction pipelining, with the help of a diagram 5m Dec2005 INSTRUCTION PIPELINING To extract better performance instruction execution can be done through instruction pipeline. The instruction pipelining involves decomposing of an instruction execution to a number of pipeline stages. Some of the common pipeline stages can be instruction fetch (IF),… Read More »
In RAID levels, explain the features of those levels which have poor I/O request rate (read/write) 5m Dec2005 Redundancy of data industrial standard, which exists for multiple-disk database schemes, is termed as RAID, i.e., Redundant Array of Independent Disks. The basic characteristics of RAID disks are: Operating system considers the physical disks as a single… Read More »
Represent the number (-26.5)10 as a floating point binary number with 24 bits. The normalized fraction mantissa has 16 bits and the exponent has 8 bits. Make and state suitable assumptions, if any 5m Dec2005 First of all draw the 24 bits precision representations S stands for Sign (white color) E stands for Exponent (yellow color) N stands for Number… Read More »
RegisterA holds the 8-bits 11011001. Determine the B operand and the logic micro-operation to be performed in order to change the value in A to: 5m Dec2005 01101101 11111101 First refer the table for Logic micro-operations which can be applied. R1:- 1 0 1 0 (initial value) R2:- 1 1… Read More »
Write a program in 8086 assembly language to find whether two strings are of equal length. You can assume that the strings are stored in the main memory and a string is terminated by a $ character 5m Dec2005 DATA SEGMENT STR1 DB ‘GANGADHAR$’ STR2 DB ‘KOPELLA$’ MSG1 DB 10,13,’LENGTH OF THE STRING 1 IS… Read More »