i solved my problem with u-boot and linux. Now i have my rootfs ramdisk mounted and functioning. But one output is weird.
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize loop: loaded (max 8 devices) RAMDISK: Compressed image found at block 0 RAMDISK: incomplete write (-28 != 1024) 4194304 VFS: Mounted root (ext2 filesystem). Freeing unused kernel memory: 96k init ifconfig: socket: Function not implemented ### Application running ... BusyBox v0.60.5 (2004.11.10-15:02+0000) Built-in shell (msh) Enter 'help' for a list of built-in commands. # ls bin dev etc ftp home lib proc sbin tmp usr var # why incomplete write? RAMDISK: incomplete write (-28 != 1024) 4194304 Thx for help, David