Path: utzoo!attcan!uunet!lll-winken!lll-ncis!helios.ee.lbl.gov!nosc!humu!uhccux!wilson
From: wilson@uhccux.uhcc.hawaii.edu (Tom Wilson)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Question about INT 21H, AH=4EH/4FH
Message-ID: <3007@uhccux.uhcc.hawaii.edu>
Date: 15 Jan 89 14:30:42 GMT
References: <13339@ncoast.UUCP>
Reply-To: wilson@uhccux.UUCP (Tom Wilson)
Distribution: na
Organization: University of Hawaii
Lines: 31

In article <13339@ncoast.UUCP> allbery@ncoast.UUCP (Brandon S. Allbery) writes:
>The only copy of the Interrupt List I can find on ncoast and my almost
>useless DOS manual agree that the structureset by INT 21, AH=4EH/4FH
>contains one 16-bit entity each for file date and time.  Question:  does
>anyone know the format of these numbers?

My essential reference on the subject of DOS interrupts is Advanced MS-DOS,
by Ray Duncan (Microsoft Press, 2nd Edition is out)

Format of the file time:
Bits	Contents
00-04	seconds (2-second increments), 0-29
05-0A	minutes (0-59)
0B-0F	hours (0-23)

File date:
Bits	Contents
00-04	date (1-31)
05-08	month (1-12)
09-0F	year (relative to 1980)

---- Duncan, p. 445

I guess I'm spoiled by using Duncan.  This is the second time this question
has been asked in the last couple of days (the other was on comp.lang.c)

-- 
Tom Wilson
wilson@uhccux.UUCP
wilson@uhccux.uhcc.Hawaii.Edu (Internet)
wilson@uhccux (Bitnet)