History of the PC

There is nothing in the history of PC that reflects the life of the present other than computers. No matter how good or bad, computers have penetrated every aspect of our society. Today's computer is not mere calculation: supermarket scanners calculate our grocery bill while preserving store inventory, computerized telephone exchanges are wary of millions of phones, communication lines Do not interrupt. With Teller Machines (ATM) you can do banking transactions from almost anywhere in the world.

A two-level adaptive predictor with a global share history buffer and a pattern history table is called a "gshare" predictor if it is associated with a global history and a branch PC, and is called "gselect" when connected Yes. Global branch prediction is used for AMD processors and Atom processors from Intel Pentium M, Core, Core 2, Silvermont. The agreement predictor is a two-stage adaptive predictor with a global share history buffer and pattern history table, and an additional local saturation counter. The output of the local forecast and the global forecast is XORed to give the final forecast. The goal is to reduce contention in the pattern history table. In the pattern history table, two branches with opposite predictions may share the same entry in the pattern history table.

In 2008, Sid Meier cited IBM PC as one of the most important three innovations in the history of video games. IBM's PC compatible platform became a technically competitive game platform in 1984 using IBM's PC / AT. The original model of the original CGA graphic is limited to the business field of PC with attraction of only 4 colors 320 × 200 pixels (or its graphics can not compete with C64 or Apple II, 16 colors 160 × 100) I will. With the 64-color EGA (Enhanced Graphics Adapter) display standard, graphics will be close to the quality of common home computers such as Commodore 64. However, the sound function of AT is still limited to PC speakers, which is different from the built-in sound used in many home computers. Chip In addition, PC compatible systems are relatively expensive, so the popularity of games is greatly limited.