Plug a cable into the LAN port of your router. Never upgrade except with a LAN cable connected to your router from your computer, and make sure your firewall, virus protection and wireless are OFF in your computer.
On your router, hold the reset button down for 30 seconds. Yellow power light should blink orange and then all lights should return to normal.
Set a static IP on your computer of 192.168.0.9. If you don't know how to do this, you should not be messing with third party firmware.
Login to the router at 192.168.0.1. Admin is username and password is left blank. MAKE SURE YOU HAVE RETURNED TO FACTORY DEFAULTS
Go to the firmware upgrade page. Select the dir601a1-factory-to-ddwrt-firmware.bin that you downloaded earlier to upgrade
WAIT FOR THREE MINUTES WITHOUT TOUCHING ANYTHING. TIME THIS!
An orange soccer ball like icon will light on the front of your router and this will stay lit.
Change your computer IP back to AUTO IP and AUTO dns.
Check your LAN connection status. You should have an IP on your computer in the 192.168.1.xxx range.
Logon to your router at 192.168.1.1
SELECT the username (make ALL the dots blue highlighted) and enter one that you will remember.
Select the password and enter one that you will remember, and then enter these and go in and configure your router.
In Windows XP, Click Start Button - All Programs - Accessories -
Communication - HyperTerminal
Enter a name for the connection, Click ok
Choose com port you adapter is plugged into, Click ok
Bits per second = 115200
Data Bits = 8
Parity = none
Stop bits = 1
Flow control = none
Click File - Save As, and select a place to save it to so you
don't have to enter the settings again.
After installing putty, run it
Serial line = The COM port your using for serial (ie. COM3)
Speed = 115200
Click on Serial under Connection
Serial line to connect to = same as above (Serial line)
Speed (baud) = 115200
Data bits = 8
Stop bits = 1
Parity = None
Flow control = None
Enter a name for your connection under saved sessions