Patent ID: 8151015

Claim:
An information processing apparatus that transfers information, using direct memory access (DMA), between a first storage section in an information processing system and a second storage section in an information transfer system, the information processing system including the first storage section configured to store the information, and a control section Configured to control the apparatus, the information transfer system including the second storage section configured to store descriptor information that indicates a location at which the information is stored in the first storage section and a size of the information, and a DMA transfer section configured to DMA transfer the information between the first storage section and the second storage section based on the descriptor information stored in the second storage section, wherein the DMA transfer section DMA transfers the descriptor information concerning the DMA transferred information from the second storage section to the first storage section, and the control section loads, from the first storage section, the descriptor information which has been DMA transferred by the DMA transfer section, wherein when the DMA transfer of the information has been completed, the DMA transfer section DMA transfers descriptor information indicating completion of the DMA transfer of the information from the second storage section in the information transfer system to the first storage section in the information processing system, and the control section loads the descriptor information indicating the completion of the DMA transfer from the first storage section, wherein an I/O interface of the information processing system is connected to a network via a transmission section having a register, DMA transfer section, temporary storage and an interrupt generation section.