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Shadow RAM is a copy of Basic Input/Output Operating System (BIOS) routines from read-only memory (ROM) into a particular area of random access memory (RAM) so that they can be accessed more rapidly. Access in shadow RAM is typically in the 60-100 nanosecond range while ROM access is in the 125-250 ns range. In some operating systems like DOS, certain BIOS routines are not only used during the boot or start-up of the system, but also during normal operation, particularly to drive the video display terminal. In Windows and OS/2, thus, these routines are not used and the use of shadow RAM is not essential. In some systems, the user can turn the use of shadow RAM off or on.
Q. Illustarte Basic Flip-flops? Let's first see a ordinary latch. A latch or flip-flop can be created employing two NOR or NAND gates. Figure (a) presents logic diagram for S-R
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An EFI boot manager is also used to select and load the operating system, removing the require for a dedicated boot loader mechanism
Convert the given S-R flipflop to a D-flip flop. Ans: The Truth Table for S-R Flip-Flop is illustrated in Fig.(a) and truth table of D Flip-Flop is illustrated in Fig.(b)
Define a register. Ans: Register: A register contain a group of flip-flops and gates which effect their transition. The flip flops hold the binary information and the g
Q. Block Format and Disk Layout on CD-ROM? A typical block format is displayed in Figure (a). It comprises the subsequent fields: Sync: Sync field identifies beginning o
Suupose a stack-oriented processor that haves the stack operations PUSH and POP. Arithmetic operations automatically involve the top one or two stack elements. Starting with an
Write the expression for Boolean function for F (A, B, C) = ∑m (1,4,5,6,7) in standard POS form. Ans: f (A,B,C )= ΣM (1,4,5,6,7) in standard POS
If for a short period of time circuits goes to some dissimilar logic level then it is assumed to have then it is known as static hazard e.g. If the final logic value of output of a
There are two types of assemblies:- 1. Private Assemblies 2. Shared Assemblies
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