Format of memory control record:
Offset	Size	Description	)
 00h 20 BYTEs	memory block info (see #03127)
 14h  6 BYTEs	???
 1Ah	BYTE	???
 1Bh  2 BYTEs	???
 1Dh	BYTE	??? bit flags
 1Eh 14 BYTEs	???
 2Ch	DWORD	pointer to ??? memory control record or 0000h:0000h
 30h	DWORD	pointer to ??? memory control record or 0000h:0000h
 34h	DWORD	pointer to next??? memory control record or 0000h:0000h
 38h	DWORD	pointer to prev??? memory control record or 0000h:0000h
 3Ch  4 BYTEs	???
Note:	the pointers at offsets 2Ch and 30h form a doubly-linked list, as do
	  the pointers at offsets 34h and 38h