Timing needs to be right in getting into the damn Redboot – takes forever.
Trick is to do a ping in one window and when you see 2 pings, use putty to connect to 192.168.20.81 port 9000. Another command prompt window WILL NOT work.
Then, ran into this issue:
/releases/svn.porsche/redboot-ar231x/redboot-ar231x/redboot_cobra/ecos/packages/devs/eth/mips/ar531x/current/src/ae531xecos.c#390:ae531x_send AHB ERROR: AR531X_DEBUG_ERROR = 00000145
Not sure if that’s an issue.
Then, try loading the ap610.rom and go and it reboots. Will try following the instructions from here http://www.dd-wrt.com/phpBB2/viewtopic.php?t=23510&postdays=0&postorder=asc&start=240 tomorrow.