How to recover CatOS bootup from rommon mode?

I have a 6509 Sup2 not being able to bootup. It displayed the following error and went into rommon mode.
Autoboot executing command: "boot bootflash:cat6000-sup2cvk8.8-3-7.bin"
Error : compressed image checksum is incorrect 0x05ECF6AF
Expected a checksum of 0x05ECF5AF
*** System received a Software forced crash ***
I want to break into the rommon mode and set the config register to bypass the config file to boot. Can someone let me know what the break sequence is for a 6509 Sup2 and what the config register I should set?
Thanks a lot
Gary

Check out the following links:
Recovering Catalyst Switches Running CatOS from Booting Failures
http://www.cisco.com/en/US/products/hw/switches/ps663/products_tech_note09186a00800949c3.shtml
Standard Break Key Sequence Combinations:
http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a0080174a34.shtml#topic1
Hope that helps.
--Sundar

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