Design and implementation of an ATM segmentation engine with PCI interface

This paper describes the design and implementation of an ATM segmentation engine including PCI interface. This engine, which was designed for an ASIC called ASAH-NIC, contains DMA read machine and segmentation machine. It uses local memory where control information is stored in schedule table, VC table, buffer descriptor and status queue. It has several special features like processing split packet buffers and automatic alignment and packing of transmit data.