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Is Bios Updates Cumalative?

By Destroyer ·
I had a thought, but can't seem to come up with the correct answer, is the Bios updates cumalative updates, i.e. like the servicce packs from Microsoft, where you can load service pack 4 without loading the previous SP's, as SP4 contains all the fixes and updates that is in the previous service packs?

Does it work the same way with a Bios update? Somehow I've got to think that when doing a bios update when flashing, only the bits of code they have changed to fix certain things in the updateyou are using to flash, are re-written on the bios and the rest stays untouched. Is this true, or can you load an update and it will contain all the fixes of previous updates as well?

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Is Bios Updates Cumalative?

by qballrail In reply to Is Bios Updates Cumalativ ...

In short, yes, BIOS updates are cumulative.

Much like Windows updates, previous fixes are contained in current ones, otherwise, the old problems would return while only new ones are fixed.

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Is Bios Updates Cumalative?

by Destroyer In reply to Is Bios Updates Cumalativ ...

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Is Bios Updates Cumalative?

by CG IT In reply to Is Bios Updates Cumalativ ...

Depends upon the mainboard mfg and BIOS. MSI boards with AMI BIOS are cumulative updates. [for a new board, you can directly flash the bios with the current version and obtain all previously version's released fixes]. Best to check with the board manufacturer.

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Is Bios Updates Cumalative?

by Destroyer In reply to Is Bios Updates Cumalativ ...

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Is Bios Updates Cumalative?

by TheChas In reply to Is Bios Updates Cumalativ ...

The updates to the BIOS code are "normally" cumulative.

That is, for the most part, the fixes from an earlier version are carried over to the next revision.
Sometimes, a "fix" is found to cause more problems than it fixes, and is removed from the next revision.

However, BIOS updates work differently than Windows patches and updates.
When you flash the BIOS, the entire code in the flash ROM is replaced with the new code.
The BIOS program is compiled machine code. Even the simplest fix may change all the bits of the code.
This is also why you usually need to clear the CMOS memory after flashing the BIOS. The locations and pointers all change.

So, you never need to step from 1 BIOS revision to the next. You can go directly to the latest, or at least the version that corrects the problem for your system.

As a benefit, if the new version of the BIOS causes your system to not work properly, you can flash the BIOS again, and go back to the old code.

Chas

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Is Bios Updates Cumalative?

by Destroyer In reply to Is Bios Updates Cumalativ ...

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Is Bios Updates Cumalative?

by Destroyer In reply to Is Bios Updates Cumalativ ...

I have seen with some Flashing utils, that they have some sort of graph status indicator showing you how far the bios has been overwritten. This graph looks very similar to the old Scandisk of Dos when doing a surface scan (blocks that are highlighted when that block's check has been completed.

Some of these blocks are kept in tact, without changing them, and is usually the first couple of blocks on the Bios. What is kept here that is not overwritten? This is the reason that led to my original question. Surely the whole Bios should be overwritten.

Any ideas?

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Is Bios Updates Cumalative?

by Destroyer In reply to Is Bios Updates Cumalativ ...

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