The present invention provides a single-chip but multi-output graphic system which provides identical or different graphic images on two display screens. The graphic system comprises at least a multimedia database, a first input process router, a second input process router, a first graphic processing unit and a second graphic processing unit. The first input process router selects the backdrop graphics and the moving object graphics (which are both provided by the multimedia database), feeds them into the first graphic processing unit and then outputs the processed graphics onto either the first display unit or the second display unit. Similarly, the second graphic processing units processes the backdrop graphics and the moving object graphics selected by the second input process router and then outputs the process graphics onto either the first display unit or the second display unit.

A single memory bus multi-media computer system is provided, including a CPU/Sound/Graphic unit, a bus arbitrator, a program and sound and graphic memory for communicating with the CPU/Sound/Graphic unit and the bus arbitrator. Only a single memory bus is required as communication is through the bus arbitrator. The addition of the bus-arbitrator can relieve the CPU/Sound/Graphic unit from performing bus synchronization and waiting for the slow memory to catch up.