| Min version | 10 Pre RTM |
|---|---|
| Max version | 10 TH2 |
| x64 offset offset:bitpos | Field Name |
| 0x0000 | void * PreviousBlockPrivateData |
| 0x0008 | uint16_t Size |
| 0x0008 | unsigned long SubSegmentCode |
| 0x0008 | uint64_t CompactHeader |
| 0x000A | uint8_t Flags |
| 0x000B | uint8_t SmallTagIndex |
| 0x000C | uint16_t PreviousSize |
| 0x000E | uint8_t SegmentOffset |
| 0x000E | uint8_t LFHFlags |
| 0x000F | uint8_t UnusedBytes |