To:	opendos AT delorie DOT com
X-Comment-To:	"da Silva, Joe" <Joe DOT daSilva AT emailmetering DOT com>
References:	<01FD6EC775C6D4119CDF0090273F74A4022035 AT emwatent02 DOT meters DOT com DOT au>
Message-Id:	<2.07b7.TR9N.GC1B3Z@belous.munic.msk.su>
From:	"Arkady V.Belousov" <ark AT belous DOT munic DOT msk DOT su>
Date:	Thu, 19 Apr 2001 14:14:23 +0400 (MSD)
Organization:	Locus
X-Mailer:	dMail [Demos Mail for DOS v2.07b7]
Subject:	RE: DOS issues #1
Lines:	30
MIME-Version:	1.0
Reply-To:	opendos AT delorie DOT com

X-Comment-To: da Silva, Joe

Hi!

19-áÐÒ-2001 18:43 Joe DOT daSilva AT emailmetering DOT com (da Silva, Joe) wrote to
"'opendos AT delorie DOT com'" <opendos AT delorie DOT com>:

dJ>     3. All versions of M$-DOS and PC-DOS I have tried
dJ>         (up to 6.22, IIRC) have a bug in the timekeeping
dJ>         stuff, such that if left at the DOS prompt or within
dJ>         an application for more than 24h, they sometimes
dJ>         forget to update the calendar. I haven't tried this
dJ>         with M$-DOS 7.XX, so it's slightly possible they
dJ>         fixed this - if not, then this can be a problem for
dJ>         embedded applications.

     Below my addition to RBIL (just for programmers note):

______________O\_/_________________________________\_/O______________
- `B-1A00':
>BUG: Under W4WG midnight flag may not be returned (AL is zero, even if
>  [0:470h] is nonzero) and consequently not cleared after this call or even
>  may not be forced after midnight at all. Moreover, if sometime this flag
>  is returned, then it anyway not cleared and not seen in next calls (for
>  example, when INT21/2Ah (DOS Get Date) function is called), so date
>  change will not forced. This trouble may be solved by direct accessing
>  [0:46Ch] and [0:470h] cells: when [0:470h] cell is changed, then call
>  INT 21/2Ah and then clear [0:470h] cell
_____________________________________________________________________
              O/~\                                 /~\O

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