Intel IA-32 - Manual (Page 266)

6-24 Vol. 3A
TASK MANAGEMENT
Figure 6-11. 64-Bit TSS Format
0 31
100
96
92
88
84
80
76
I/O Map Base Address
15
72
68
64
60
56
52
48
44
40
36
32
28
24
20
16
12
8
4
0
RSP0 (lower 32 bits)
RSP1 (lower 32 bits)
RSP2 (lower 32 bits)
Reserved bits. Set to 0.
RSP0 (upper 32 bits)
RSP1 (upper 32 bits)
RSP2 (upper 32 bits)
IST1 (lower 32 bits)
IST1 (upper 32 bits)
IST2 (lower 32 bits)
IST3 (lower 32 bits)
IST4 (lower 32 bits)
IST5 (lower 32 bits)
IST6 (lower 32 bits)
IST7 (lower 32 bits)
IST2 (upper 32 bits)
IST3 (upper 32 bits)
IST4 (upper 32 bits)
IST5 (upper 32 bits)
IST6 (upper 32 bits)
IST7 (upper 32 bits)
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved