This entry point is the address of a table of ring levels required when calling each of the Enable subfunctions. The table is an array of bytes corresponding to the subfunction numbers, terminating with a byte of 0 (that is, an ASCIIZ string). The most significant six bits of each byte are reserved and must be 0. The remaining two bits of each byte represent the ring level to be used when dispatching the corresponding function in the dispatch table.
00 = End of Table 10 = Ring 2
01 = Ring-2-Conforming 11 = Ring 3
Any subfunction that does not have a corresponding byte in the table will be dispatched as Ring-2-conforming. This is the most desirable case from the standpoint of system performance.
旼컴컴컴컴컴컴컴컴컴컴컴컴컴컴컫컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿞ubfunction 쿝ing Level � 쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿢nused � 0x01 � 쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿑illLogicalDeviceBlock � 0x01 � 쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿑illPhysicalDeviceBlock � 0x03 � 쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿢nused � 0x01 � 쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿏isablePhysicalDeviceBlock � 0x02 � 쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿌ll others � 0x00 � 읕컴컴컴컴컴컴컴컴컴컴컴컴컴컴컨컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴�
The following example of six bytes would declare FillPhysicalDeviceBlock as Ring 3, DisablePhysicalDeviceBlock as Ring 2, and all other subfunctions as Ring-2-conforming:
0x01 0x01 0x03 0x01 0x02 0x00
If the address of this table is not exported, all subfunctions will be called as Ring-2-conforming as if the table had contained the single byte 0x00.