Projecto e implementação de um subconjunto da arquitectura MIPS16 com base em FPGA XC4010XL

Abstract

The paper considers the design of a proccessor with MIPS16 architecture on the base of FPGA XC4010XL and presents the developed software tools that allow to analyse the constructed digital circuits in FPGA, to implement the desired set of instructions for the processor, and to work with the processor in interactive mode. The design flow is based on tools and libraries of the commercially available Xilinx Foundation Series 1.5 Software. The final circuits have been implemented in FPGA XC4010XL to be installed on the XS40 board of XESS. The experiments have been performed with XS40 and XStend boards connected to a PC computer via the parallel port. We expect that the designed processor core migth be efficiently used in embedded applications. The developed software includes a micro assembler for the processor with a flexibly modifiable set of instructions, graphical tools enabling to analyse different circuits of the processor and a user-friendly interface supporting interactive mode.