Patent ID: 6791560
Filing Date: 2004-09-14
Classification: G06T

Abstract:
A vertex data access apparatus, comprising:an interface controller having a vertex data queue to receive a vertex data request, fetch vertex data from a system memory according to the vertex data request, and store the vertex data into the vertex data queue; and a vertex data queue controller to receive a vertex index, determine to send the vertex data request corresponding to the vertex index to the interface controller according to the vertex index, monitor the state of the vertex data queue, and access the vertex data from the vertex data queue according to the state in which a vertex data read signal is received; wherein the vertex data queue controller comprises: an index comparator unit for finding out whether the vertex index is the same as any one index in an vertex index register, and reporting a corresponding result; a limit counter to record the number of requests issued by the interface controller; and a request controller coupled to the index comparator unit to receive the result, determine to send the vertex data request to the interface controller according to the result and the value of the limit counter, and store the result into a reference register.