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Copyright 1991 David Jurgens |
INT 21,57 - Get/Set File Date and Time Using Handle
AH = 57h
AL = 00 get date and time
= 01 set date and time
= 02 ??? (DOS 4.0+ undocumented)
= 03 ??? (DOS 4.0+ undocumented)
= 04 ??? (DOS 4.0+ undocumented)
BX = file handle
CX = time to set (if setting)
DX = date to set (if setting)
ES:DI = pointer to buffer to contain results
on return:
AX = error code if CF set (see DOS ERROR CODES)
CX = file time (if reading, see below)
DX = file date (if reading, see below)
Time encoding:
│F│E│D│C│B│A│9│8│7│6│5│4│3│2│1│0│ Time in CX
│ │ │ │ │ │ │ │ │ │ │ └─┴─┴─┴─┴──── two second incr (0-29)
│ │ │ │ │ └─┴─┴─┴─┴─┴───────────── minutes 0-59)
└─┴─┴─┴─┴──────────────────────── hours (0-29)
Date Encoding
│F│E│D│C│B│A│9│8│7│6│5│4│3│2│1│0│ Date in DX
│ │ │ │ │ │ │ │ │ │ │ └─┴─┴─┴─┴──── day (1-31)
│ │ │ │ │ │ │ └─┴─┴─┴───────────── month (1-12)
└─┴─┴─┴─┴─┴─┴──────────────────── year - 1980
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| Esc or Alt-X to exit |
int 21,57 |
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