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Chapter 4 157
BDS & Specific action:
0x0
0
Report the legacy boot is happening
0x1
2
Wake up the APs
0x1
3
Initialize SMM Private Data and relocate BSP SMBASE
0x2
1
0x2
7
PC init begin at the stage1
Report every memory range do the hard ware ECC init
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8
Report status code of every memory range
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0
Get the root bridge handle
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1
Notify pci bus driver starts to program the resource
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8
Reset the host controller
0x5A IdeBus begin initialization
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0
Simple Text Output Protocol Functions(VGA class reset)
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1
Report that VGA Class driver is being disabled
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2
Report that VGA Class driver is being enabled
0x7
8
Terminal Console In reset and Console Out reset
0x7
9
Report that the remote terminal is being disabled
0x7A Report that the remote terminal is being enabled
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0
Keyboard reset
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1
USB Keyboard disable
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2
Keyboard detection
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3
Report that the usb keyboard is being enabled
0x9
4
Clear the keyboard buffer
0x9
5
Init Keyboard
0x9
8
Mouse reset