Intel 253668-032US User Manual
![Intel](https://files.manualsbrain.com/attachments/5a71b1e7f60391972dadeef20435931cbf4621a5/common/fit/150/50/86c99b5f14aeb2708e9a9e1b5305af4ccf882c1af0155dad25413c2ed84e/brand_logo.png)
9-60 Vol. 3
PROCESSOR MANAGEMENT AND INITIALIZATION
Figure 9-8. Microcode Update Write Operation Flow [1]
1
Valid Update
Header Version?
Loader Revision Match
BIOS’s Loader?
Does Update Match A
CPU in The System
Write Microcode Update
Does Update
Checksum Correctly?
Yes
Yes
Yes
No
Return
CPU_NOT_PRESENT
No
Return
INVALID_HEADER
No
Return
INVALID_HEADER
No
Return
INVALID_HEADER_CS