Cisco 2600 router reset password

after start before boot complete you should press break to go to rommon

rommon 1 > confreg 0x2142
rommon 2 > reset

after reboot press no for questions

Router>
Router>enable
Router#copy startup-config running-config

Router#configure terminal
Router(config)#enable secret <>
Router(config)#^Z

Router#configure terminal
Router(config)#interface Ethernet0/0
Router(config-if)#no shutdown
Router(config-if)#
Router(config-if)#^Z
Router#

Router#copy running-config startup-config

Router#show version

Router#configure terminal
Router(config)#config-register 0x2102
Router(config)#^Z
Router#show version

next reboot it