Hi,all users! Firstly,thank u for your help! now let's go to talk about the latest test results on my board use a rtl8019 . i think it's necessary to show my ide first. my board use s3c44b0 and rtl 8019as, and i port u-boot 1.1.4 to my board.as you know ,there are some problems with my rtl8019.i use a pc(runs win2k) to do the test work. Note,my pc and my board communicate by a hub.that is ,my pc and my board both plug their rj45 head in the hub .my pc's ip is 192.168.0.23,gateway:192.168.0.1.my board 's ip is 192.168.0.70.netmask 255.255.0.0. i get some suggestions ,and i did some amend.as follows: 1>memset(*.0xff.*) 2>MAC;00:80:48:12:34:56 yesterday,i install a 3CDaemon(a tftp server soft) on my win2k system to start up the tftp service on my win2k system.and i install the ethereal to capture the data on the net. of course,i run the two programs on the win2k. to test my tftp server,in the cmd command window(in win2k),i type "C:->tftp 192.168.0.23 get image.bin",the result is perfert.and i found the file "image.bin" in the C: directory. but unfortunately, when i start my board,i didn't see my board's ip list in the 3CDaemon and ethereal.(i think the ip should in the list of the two soft?). the board's information show as follow: U-Boot 1.1.4_XT (Jun 8 2006 - 10:38:40) U-Boot code: 0C300000 -> 0C31AD7C BSS: -> 0C31EFA4 RAM Configuration: Bank #0: 0c000000 8 MB Bank #1: 0c800000 8 MB Flash: 2 MB *** Warning - bad CRC, using default environment In: serial Out: serial Err: serial MAC: 22:22:22:22:22:22 Hit any key to stop autoboot: 0 XT=> printen bootargs=setenv bootargs root=/dev/ram ip=192.168.0.70:::::eth0:off ether=25,0,0,0,eth0 ethaddr=00:80:48:12:34:56 bootcmd=bootm 20000 f0000 bootdelay=5 baudrate=115200 ethaddr=00:80:48:12:34:56 ipaddr=192.168.0.70 serverip=192.168.0.23 netmask=255.255.0.0 bootfile="image.bin" stdin=serial stdout=serial stderr=serial Environment size: 326/1020 bytes XT=> tftpboot TFTP from server 192.168.0.23; our IP address is 192.168.0.70 Filename 'image.bin'. Load address: 0xc008000 Loading: T T T T T T T T T T T T T T T T T T T T Retry count exceeded; starting again so i do not know how to do next now ,someone could help me go further ? where's the real problem ?and what to do next? thank you very much!

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