Online HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens
XFCB - Extended DOS File Control Block
Offset Size Description
00 byte flag containing FF if this is an extended FCB
01 5bytes reserved
06 byte directory attribute byte (see FILE ATTRIBUTE)
07 byte drive number (0 for default drive, 1 = A:, 2 = B:)
08 8bytes filename, left justified with trailing blanks
16 3bytes filename extension, left justified w/blanks
19 word current block number relative to file start (0 based)
21 word logical record size in bytes
23 dword file size in bytes
27 word date the file was created or last updated:
│F│E│D│C│B│A│9│8│7│6│5│4│3│2│1│0│ 21,20
│ │ │ │ │ │ │ │ │ │ │ └─┴─┴─┴─┴─ day 1-31
│ │ │ │ │ │ │ └─┴─┴─┴────────── month 1-12
└─┴─┴─┴─┴─┴─┴───────────────── year + 1980
29 16bytes reserved for system use
39 byte relative record number within current BLOCK
40 4bytes relative record number from start of file (0 based)
[helppc.bosbyte.nl] extended file ctlblk