COMPUTER SYSTEM

PROBLEM TO BE SOLVED: To invalidate and update an unnecessary entry without affecting other GART table entries by making a core logic chip set remap a virtual address to a physical address that is located in a memory by means of a GART table. SOLUTION: A video graphics controller 210 is connected to a core logic chip set 204 via an AGP bus 207. The set 204 remaps a virtual address to a physical address that is located in a memory by means of a GART table. If an entry invalidated part is set at a logic level based on the information which is received via a cache entry control register, an interface logic invalidates the information located at a storage position related to the graphics device address which is received by the cache entry control register.