This hazard is present only in pipelines that write in more than one pipe stage or allow an instruction to proceed even when a previous instruction is stalled. The DLX integer pipeline writes a register only in WB and avoids this class of hazards.
The first touchscreen phone was launched in 1992 by IBM.The IBM Simon is also referred as the first smartphone.Simon is the first smartphone to be incorporated with the features of a PDA.
Who Invented Multi-Touch? Apple may have brought us the first multi-touch device for the masses when it came out with the iPhone in 2007. However, just like the graphical user interface in the first Macintosh, Steve Jobs and Apple did not invent multi-touch technology. Rather, it was a slow progression of research and innovation, decades in the making. Below are some notable developments in multi-touch technology, culminating with the iPhone in 2007.