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Describe Real and protected mode:
Operation of Real mode interrupt: When microprocessor completes executing the current instruction, it concludes whether an interrupt is active by checking (1) instruction execution, (2) single -step, (3) NMI, (4) co-processor segment overrun, (5) INTR and (6) INT instruction in the order presented. If one or more of these interrupt conditions are present, following sequence of events takes place:
1. Contents of the flag register are pushed onto the stack
2. Both the interrupt (IF) and trap (TF) flags are cleared. This disables INTR pin and trap or single-step feature.
3. Contents of the code segment register (CS) are pushed onto the stack.
4. Contents of the instruction pointer (IP) are pushed onto the stack.
5. The interrupt vector contents are fetched and then placed into both CS and IP so that the subsequent instruction executes at the interrupt service procedure addressed by the vector.
Name the dynamic memory allocation function? Three dynamic memory allocation functions are: a) malloc, b) calloc and c) free.
Define memory access time? The time needed to access one word is known as the memory access time. Or It is the time that elapses among the initiation of an operation and the co
What does the term convergence mean regarding E-commerce? Convergence regarding e-commerce: The capability to leverage and integrate the different data sources and proces
Explain about the Public Key Cryptography. Public Key Cryptography: It is a cryptographic system which uses two keys as a public key identified to everyone and a private
Describe generic framework for electronic commerce Generic Framework for electronic commerce contains the Applications of EC (like as banking, shopping in online stores and m
What is hit? A successful access to data in cache memory is known as hit. Normal 0 false false false EN-IN X-NONE X-NONE
Electronic Data Interchange (EDI ) is used by companies for transactions that happen on regular basis to a pre-determined format. It is one of the electronic commerce technologies.
Data Transfer Two most fundamental data transfer instructions in 8086 microprocessor are XCHG and MOV. Let's give illustrations of the use of these instructions. Program 1:
Device drivers are special programs installed by config.sys file to control installable devices. So personal computers can be expanded at some future time by installation of new d
The MSI chip 7474 is ? Ans. MSI chip 7474 is TTL, dual edge triggered D Flip-Flop.
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