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Table 40. Port 80h POST Codes (continued)
POST Code
Description of POST Operation
90
Resetting keyboard
91
Disabling keyboard
92
Detecting presence of keyboard
93
Enabling the keyboard
94
Clearing keyboard input buffer
95
Instructing keyboard controller to run Self Test (PS/2 only)
98
Resetting mouse
99
Disabling mouse
9A
Detecting presence of mouse
9B
Enabling mouse
B0
Resetting fixed media
B1
Disabling fixed media
B2
Detecting presence of a fixed media (IDE hard drive detection etc.)
B3
Enabling/configuring a fixed media
B8
Resetting removable media
B9
Disabling removable media
BA
Detecting presence of a removable media (IDE, optical drive detection, etc.)
BC
Enabling/configuring a removable media
E0
Started dispatching PEIMs (emitted on first report of EFI_SW_PC_INIT_BEGIN
EFI_SW_PEI_PC_HANDOFF_TO_NEXT)
E2
Permanent memory found
E1, E3
Reserved for PEI/PEIMs
E4
Entered DXE phase
E5
Started dispatching drivers
Error Messages and Beep Codes
Keyboard (PS/2 or USB)
Mouse (USB)
Fixed Media
Removable Media
PEI Core
DXE Core
continued
75
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