A hazard is created whenever there is a dependence between instructions, and they are close enough that the overlap caused by pipelining would change the order of access to an operand. Our example hazards have all been with register operands, but it is also possible to create a dependence by writing and reading the same memory location. In DLX pipeline, however, memory references are always kept in order, preventing this type of hazard from arising.
It was actually a few years later, in the year 1898 to be exact, when this idea had taken its existence. Vlademar Poulsen was the person who had invented the earlier concept of Oberlin. In 1928, Fritz Pfleumer developed the magnetic tape. But it was not that compact as how the modern cassette player was.
Blockbuster can thank Charles Ginsberg, inventor of the videotape recorder, for its brief but profitable rise, all based upon a simple business model of renting video tapes. Ginsberg, an researcher at Ampex Corporation, invented the videotape recorder in 1951. The contraption worked by taking live images from cameras and converting them into electrical impulses stored on magnetic tape. Ampex sold the first video tape recorder for $50,000 in 1956. By 1971, Sony began marketing the first at-home VCRs. After Ginsbergâs invention broke, nothing was ever the same for the entertainment industry.