Intel IA-32 - Manual (Page 404)

9-30 Vol. 3A
PROCESSOR MANAGEMENT AND INITIALIZATION
Figure 9-4. Constructing Temporary GDT and Switching to Protected Mode (Lines
162-172 of List File)
FFFF FFFFH
Base=0, Limit=4G
START: [CS.BASE+EIP]
TEMP_GDT
• Jump near start
FFFF 0000H
• Construct TEMP_GDT
• LGDT
• Move to protected mode
DS, ES = GDT[1] 4 GB
0
GDT [1]
GDT [0]
GDT_SCRATCH
Base
Limit