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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.
Compare the architecture of SS7 with seven-layer OSI architecture The relationship among these levels and the layers of the OSI model is demonstrated in figure. The user part i
What is the difference between Leave Transaction and Call Transaction? In contrast to LEAVE TO TRANSACTION, the CALL TRANSACTION statement causes the system to start a new SAP
What are the different modes in that 8255 Programmable Peripheral Interface (PPI) can operate? 24 I/O lines in 3-8-bit port groups - A, B, C A, B can be 8-bit input
Problem 1 a) What is the purpose of the CPU and what can the CPU perform. b) Name the two most common types of software and briefly illustrate each one. c) The CPU con
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In a two stage network there are 512 inlets and outlets, r=s=24. If the probability that a given inlet is active is 0.8, calculate: Switching capacity Given: N =M =512, α
List the allowed register pairs of 8085. B-C register pair D-E register pair H-L register pair
Q. Example on Passing Parameters through Stack? PROGRAM: Version 3 DATA_SEG SEGMENT BCD DB 25h; Storage for BCD test value BIN
Describe carry look-ahead adder? Ans: The input carry required by a stage is directly computed from carry signals obtained from all of the preceding stages i-1,i-2,.....0, rat
implementation of threads
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