Computer Organization - Question and answer - 7

31. What is a special purpose register ?
A special purpose register is one that has a specific control or data handling task to carry out. There are a number of special purpose registers within the CPU. The diagram above shows that the CPU contains a number of registers in order to process data and to follow program instructions.

32. What is a bridge circuit ?
A bridge circuit is a topology of electrical circuitry in which two circuit branches (usually in parallel with each other) are "bridged" by a third branch connected between the first two branches at some intermediate point along them.

33. What is an address decoder ?
An address decoder is a binary decoder that has two or more inputs for address bits and one or more outputs for device selection signals. When the address for a particular device appears on the address inputs, the decoder asserts the selection output for that device.

34. What is timing signals ?
Electrical pulses generated in the processor or in external devices in order to synchronize computer operations. The main timing signal comes from the computer's clock, which provides a frequency that can be divided into many slower cycles.

35. What is optimizing compiler ?
An optimizing compiler is a compiler that tries to minimize or maximize some attributes of an executable computer program. Common requirements are to minimize a program's execution time, memory requirement, and power consumption. Compiler optimization is generally implemented using a sequence of optimizing transformations, algorithms which take a program and transform it to produce a semantically equivalent output program that uses fewer resources and/or executes faster.
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