Bootarguments for Mini 2440

hi all,
 
   I have loaded uImage.bin & qtopia.jffs2 on my mini 2440 board. after
loading both of them i have set the following command.
  setenv bootcmd 'nboot.e kernel;bootm'
  saveenv
 
on reset, GUI of qtopia is visible but i cannot find the command prompt on
my terminal with which i can control my application.  Can you please fwd me
the exact bootargs command by which i can get my cmd promt.
 
i have tried with, below but it is showing kernel panic error.
 
setenv bootargs root=/dev/mtdblock3 rootfstype=jffs2 console=ttySAC0,115200
mini2440=0tb rootwait

saveenv
 
please help me on it.

here uImage and qtopia files, are written in nand @ offset addr of 500000
and 560000 resp. these files are loaded with tftp on to the ram and then
been written to nand using nand write.e cmd. plz guide me...