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Author Topic: 1bl Rom Question  (Read 144 times)

blueray

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1bl Rom Question
« on: December 17, 2009, 08:09:00 AM »
Hi,

does somebody know if the 1BL ROM can be overwritten from a MS update or in other ways or it is a real ROM(read only memory)?
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Icekiller2k6

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1bl Rom Question
« Reply #1 on: December 17, 2009, 10:34:00 AM »
QUOTE(blueray @ Dec 17 2009, 04:09 PM) View Post

Hi,

does somebody know if the 1BL ROM can be overwritten from a MS update or in other ways or it is a real ROM(read only memory)?

1bl is @ cpu...

so no you can't change it..

2BL has been updated with a fuse burned @ second fuseline. thats why you can't use an older anymore
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blueray

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1bl Rom Question
« Reply #2 on: December 17, 2009, 02:10:00 PM »
QUOTE(Icekiller2k6 @ Dec 17 2009, 06:34 PM) View Post

1bl is @ cpu...

so no you can't change it..

2BL has been updated with a fuse burned @ second fuseline. thats why you can't use an older anymore


Thank you for this info smile.gif
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FutabaGP

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1bl Rom Question
« Reply #3 on: December 20, 2009, 11:04:00 PM »
fuse burned @ second fuseline
What is that mean? What fuses?
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BiN4RY^

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1bl Rom Question
« Reply #4 on: December 26, 2009, 09:35:00 PM »
eFuse are actual fuses inside of the CPU. When the 2BL is updated, a revocation fuse is blown, making older CB versions unable to boot. When the CB initializes, it will compare the lockdown fuses for the current CB to see if it matches. If not, it will not start.
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