Graphic information processing system having a RISC CPU for displaying information in a window

A graphic information processing system for displaying graphic information on a plurality of windows on a screen, said graphic information processing system comprising:

• a reduced instruction set computer (RISC) central processing unit having an address bus, an instruction bus, and a data bus;
• a memory device for storing or reading out instructions or data, which is connected with said RISC central processing unit via said instruction and data buses, said memory device including:
• a main memory device for storing information that is applied thereto,
• a memory controller for receiving via said address bus an address signal being applied thereto from said RISC central processing unit and then controlling said main memory device,
• a first buffer for temporarily storing and transmitting applied information, which is connected between said main memory device and said data bus, and
• a second buffer for temporarily storing and transmitting applied information, which is connected between said main memory device and said instruction bus;
• an image processor connected with either said address or data bus, for processing information being processed as a video signal so that the processed video signal is displayed on a video display apparatus;
• and
• a network interface connected with said data bus and for enabling information exchange between said graphic information processing external host computers.