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kerberos_20 View Drop Down
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Points: 3687 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kerberos_20 Quote  Post ReplyReply Direct Link To This Post Topic: X399 Post Confirmation
    Posted: 29 Jul 2018 at 5:56pm
Quote Aptio Boot Flow
Aptio 5.x core follows the firmware model described by the UEFI Platform Initialization Specification (PI).
 The PI Specification refers the following "boot phases" which may apply to various checkpoint and beep code descriptions:
- Security (SEC) - initial low-level initialization
- Pre-EFI Initialization (PEI) - memory initialization (Analogous to "bootblock" functionality of legacy BIOS)
- Driver Execution Environment (DXE) - main hardware initialization (Analogous to "POST" functionality in legacy BIOS)
- Boot Device Selection (BDS) - system setup, pre-OS user interface & selecting a bootable device (CD/DVD, HDD, USB, Network, Shell, ...


Edited by kerberos_20 - 29 Jul 2018 at 5:59pm

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Points: 3 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ssmith335 Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jul 2018 at 1:55am
Its my understanding that when a motherboard boots it checks all hardware for functionality; memory, MB, etc., and won't boot until all are deemed functional, etc. 

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