BDS & Specific action

Code

Description

0x27 Enable DRAM Channel I/O Buffers 0x28 Enable all clocks on populated rows 0x29 Perform JEDEC memory initialization for all memory rows 0x30 Perform steps required after memory init 0x31 Program DRAM throttling and throttling event registers 0x32 Setup DRAM control register for normal operation and enable 0x33 Enable RCOMP 0x34 Clear DRAM initialization bit in the SB 0x35 Initialization Sequence Completed, program graphic clocks 0x43 Program Thermal Throttling

Code Description

0x00 Report the legacy boot is happening 0x12 Wake up the Aps 0x13 Initialize SMM Private Data and relocate BSP SMBASE 0x21 PC init begin at the stage1 0x27 Report every memory range do the hard ware ECC init 0x28 Report status code of every memory range 0x50 Get the root bridge handle 0x51 Notify pci bus driver starts to program the resource 0x58 Reset the host controller 0x5A IdeBus begin initialization 0x79 Report that the remote terminal is being disabled 0x7A Report that the remote terminal is being enabled 0x90 Keyboard reset 0x91 USB Keyboard disable 0x92 Keyboard detection 0x93 Report that the usb keyboard is being enabled 0x94 Clear the keyboard buffer 0x95 Init Keyboard 0x98 Mouse reset 0x99 Mouse disable 0x9A Detect PS2 mouse 0x9B Report that the mouse is being enabled 0xB8 Peripheral removable media reset (ex: IsaFloppy, USB device) 0xB9 Peripheral removable media disable 0xBB Peripheral removable media enable 0xE4 Report Status Code here for DXE_ENTRY_POINT once it is available 0xF8 Report that ExitBootServices() has been called 0xF9 Runtime driver set virtual address map