Wednesday 9 April 2014

8085 microprocessor

1. What is an assembler?
An assembler is software that takes a source code file, written in text format, and translates it into an “object file”.
2. What are the different assembly languages used for 8085 microprocessor?
Two different assembly languages are used for 8085 microprocessor- one is used by the manufacturer INTEL and the other defined in IUL 77.
3. What is coprocessor?
A coprocessor is an arithmetic coprocessor, as it is so called, performs operations like exponentiation, trigonometric functions, etc. to implement these functions in CPU hardware is a costly one and the software implementation of the above slows down the processor. A coprocessor overcomes these difficulties.
The coprocessor has its own instruction set. The CPU and the coprocessorexecute their respective instructions from the same program.
The instructions belonging to the coprocessor are fetched and decoded by the CPU but executed by the coprocessor.
4. What is coprocessor Trap?
When a coprocessor is not connected in the system and the functions of thecoprocessor is done by the CPU by writing its instructions from a predetermined location in the form a software routine and invoked by interrupt, it is known as acoprocessor trap.
5. What is a debugger?
A debugger is a program that debugs and object code program by placing in into the system memory and subsequently executing the same.
6. Distinguish between KB, MB, GB, TB, and PB.
These stands for Kilobyte, Megabyte, Gigabyte, Terabyte, Petabyte respectively.
7. Explain single and double precision.
Single and double precision mean 32 bits and 64 bits storage areas respectively. The extra storage space made available from single to double precision- utilized for accommodating more number or mantissa bits- would result in much more accuracy from the system.

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