[ECOS] not able to connect to gdb with redboot

[Rajeev murthy]

hello,
   i have redboot on my board (a proprietory one with a Samsung microcontroller with an  ARM core). i understand that with redboot on my board i can get source level debugging by connecting to GDB via redboot.
   i am just not able to get GDB connect to my board. i tried all these things
1.target rdi /dev/ttyS0
2.target remote /dev/ttyS0
3.target rdp /dev/ttyS0
  what is the gdb looking for to connect ?
 i have set the baud rate to match my board's.
 is a serial connection with the host and the target board sufficient for gdb to connect with redboot on the board ?
  when i type $g#67 , i get a display of the registers which means the gdb stubs are working.
 but i would prefer to debug with insight.
please let me know where i'm going wrong and 
what i should do to connect to GDB?
  all inputs would be greatly appreciated.
thanks a lot
rajeev


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