"Charlie" <charlied@NOSPAMbboard.com> wrote in message news:<3bfd4dd6_1@news.starnetinc.com>...
> Actually, I believe there are 7 reserved bytes in the ProDOS sub-directory
> header and 8 in the volume directory header.  The bytes in question are
> $14 - $1B offset from the beginning of the block.  As you mentioned in a
> sub-directory byte $14 is defined as $75.  I don't know why either.
> I strongly suspect (but I have never checked) that the 4 bytes ($16 - $19)
> are the date/time that the volume was last modified using the same structure
> as the creation date/time.
> 
> Charlie

You are correct!!  I verified this by looking at several disks.  The
corrected struct is thus:

/***********************************************************/
//	directory header
typedef struct {
	Pro_TypeName		typeName;
	RboShort			unknown;		//	vol = 0x00, dir = 0x75 (117d)
	Pro_DateTime		modifiedTime;
	RboShort			locaseBits;
	Pro_DateTime		createdTime;
	Byte				version;
	Byte				minVersion;
	Pro_AccessPriv		access;
	Byte				entryLen;
	Byte				entriesPerBlock;
	RboShort			fileCount;
	
	union {
		struct {
			Pro_BlockSpec		bitMap;
			RboShort			totalBlocks;
		} volume;
		
		struct {
			Pro_BlockSpec		parent;
			Byte				parentEntryNum;
			Byte				parentEntryLength;
		} directory;
	} headerType;
	
} Pro_DirHeader;

-laz