Table 3.7 Recording date / time format

byte position	type	Field name	Description
1 2 3 4 5 6 7	N N N N N N N	Number of years since 1900 Month of the year from 1 to 12 Day of the month from 1 to 31 Hour of the day from 0 to 23 Minute of the hour from 0 to 59 Second of the minute from 0 to 59 Offset from Greenwich Mean Time in number of 15 min intervals from-48 (West) to +52(East)	Years since 1900 Month Day Hour Minute Second Difference from Greenwich Mean Time 15min increments From -48 (west) to +52 (east)

(2) File flag

Table 3.8 File flags

bit position	Field name	Description
0 1 2 3 4 5 6 7	Existence Directory Associated File Record Protection Reserved Reserved Multi-Extent	Invisible file Directory file Related file (= 0) Extended attribute record structure file Protected file (= 0) Multiple extent files (= 0)

(3) File identification

The file name or directory name is stored according to the value of the directory bit (bit 1) of the file flag.
Directory bit = 0: Specifies identification information for the file.

Table 3.9 File identification

Directory bit value	type expression	Description
0	File name. Extension: Version number << Example >> aaaaaaaa.bbb; 1 xxxxxxxx; 1	File name: Up to 8 characters Extension: 3 characters or less (can be omitted) version number: Always 1
1	directory name	directory name: up to 8 characters The root directory is 1 byte 00H

∙ If the file identification length is an even number, 1 byte (00H) is embedded and inserted.