Hi, I have done some modification on L2L3NAT_8_1Gig_hw project so that it can be run under simulation mode. Following are changes I have made: 1. Change to Simulation mode 2. Define SIMULATION,BUILDFREELIST for Microengine 5. 3. Uncomment the following statement in EgressInit[]: immed[temp2, 0x00d7] immed[temp1, 0x00db] And comment out the following statements: immed[temp2, 0x00b7] immed[temp1, 0x00bb] 4. Create a script file to initialize SRAM, DRAM, and Scratchpad 5. Set data stream and assign I/O ports to pump in packets. But, I found that data stream could not be pumped into RFIFO. Thus the content of RFIFO are zeros and TFIFO are uninitialized. Anybody have encountered this problem? How to solve it? Thanks. Regards, Eng Kean __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com