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.
In 2005, Tony Fadell, the engineer whoâs credited with inventing the first iPod, got hold of a high-end desk phone made by Samsung and Bang & Olufsen that you navigated using a set of numerical keys placed around a rotating wheel. A Samsung cell phone, the X810, used a similar rotating wheel for input.