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Table 3223

Format of Extended DMA descriptor structure (EDDS) with page table entries:
Offset	Size	Description	)
 00h	DWORD	region size
 04h	DWORD	offset
 08h	WORD	segment/selector
 0Ah	WORD	reserved
 0Ch	WORD	number available
 0Eh	WORD	number used
 10h	DWORD	page table entry 0 (same as 80386 page table entry)
 14h	DWORD	page table entry 1
	...
Note:	bits 1-11 of the page table entries should be zero; bit 0 set if page
	  is present and locked

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