Importance

Loading Importance Indicators...

Abstract

A duplicate cache tag store, accessible to a graphics processor and to devices connected to the I/O bus without creating traffic on the system bus. Any entry into, or displacement from, the CPU cache tag store is also entered into, or displaced from, the second cache tag store. The disclosure further describes a computer graphics system, having a graphics processor capable of reading from or writing to main memory, including virtual memory, without any action by the CPU; having a FIFO command buffer in main memory for temporary storage of graphics commands; having a residue buffer for the temporary storage of memory transmissions not immediately usable by the graphics processor; having a 'short circuit' feature for routing graphics commands to the command processor in the minimum number of steps; having a cursor control system capable of storing cursor pattern information in, and retrieving cursor pattern information from, main memory; having a cursor bus that is reconfigurable to carry information other than cursor information; and having a frame buffer module that contains no timing or cursor control circuitry.

Loading the Abstract Image...

First Claim