"Brolin Empey" <bro...@brolin.be> wrote in message
news:nssmo.1329$317.1...@newsfe20.iad...
[]
My RTC already runs in UTC, but my RTC is approximately 2 minutes behind
because I have no way of writing the Windows NT system time to the
hardware clock (RTC) after using an NTP client to synchronise the
Windows NT system time. On Ubuntu, I use ntpdate-debian + hwclock, but
I cannot find a real hwclock for Windows NT, only malware which uses the
name hwclock.exe as a disguise. I need an hwclock.exe application for
Windows NT so I can run “hwclock --utc --systohc” like on Ubuntu. I am
asking in this group because I thought someone may know of an NTP client
for Windows NT with this functionality, now that Microsoft has finally
fully fixed support for RealTimeIsUniversal=1 beginning in Windows Vista
SP2 + Windows 7.
Brolin,
If it helps, here is rather old code for DOS for reading the RTC. I'm not
sure how you would map the INT 26 (hex 1A) to Windows. You may also need
to give the program port mapping capabilities.
Cheers,
David
function from_bcd (bcd: byte): word;
begin
from_bcd := 10 * ((bcd and $F0) shr 4) + (bcd and $0F);
end;
procedure get_rtc_time (var h, m, s: word);
var
r: Registers;
begin
with r do
begin
ah := $02; Intr ($1A, r);
h := from_bcd (ch);
m := from_bcd (cl);
s := from_bcd (dh);
end;
end;
procedure get_rtc_date (var y, m, d: word);
var
r: Registers;
begin
with r do
begin
ah := $04; Intr ($1A, r);
y := 100*from_bcd (ch) + from_bcd (cl);
m := from_bcd (dh);
d := from_bcd (dl);
end;
end;
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