| Min version | XP | 2003/XP64 SP1 | |
|---|---|---|---|
| Max version | 2003/XP64 SP2 | Vista SP2 | |
| Architecture | x86 | x86 | |
| x86 offset offset:bitpos | Field Name | x64 offset offset:bitpos | |
| 0x0000 | union __unnamed U | union <unnamed-tag> U | |
| 0x0208 | unsigned long NpxSavedCpu | ||
| 0x020C | unsigned long Cr0NpxState | ||