Domain: beaglesoft.com
Stories and comments across the archive that link to beaglesoft.com.
Comments · 8
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Re:Legacy Hardware
http://www.beaglesoft.com/pcie2pci.htm
Congratulations.
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Since 6/23/10 pcie2pci adapter sell like hot cake
Another news: pcie to pci adapter sell like hot cake since 6/23/2010. http://www.beaglesoft.com/pcie2pci.htm
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Re:Altitude?
Technically, you'll need four or more satellites in view to calculate altitude. In general, you'll need (n+1) points of reference (satellites) to triangulate a point in an n-dimension space. (Assuming you want the position calculated in all n dimensions).
In practice, three satellites are adequate for ground and altitude calculation (since most other spatial possibilities can be ruled out as being 'ridiculous').
For more info: http://www.beaglesoft.com/gpstechnology.htm#Triang ulation -
Re:Uh, yeah - *great* idea
We have a completely locked down firewall where I work. The only external access is through an http proxy (ok, there is also DNS, but TCP/IP over dns, while it does actually exist, is not very convenient). I used to use SSHWebProxy, a java servlet that makes an ssh connection using only http requests, so it has no problem getting through a proxy. It was ok, but I have since switched to anytermwhich, while still using only http, manages to get pretty much a complete interactive terminal.
I realize this is slightly off topic, so to return to the issue of time, I agree with others that if you need a precise time source, just buy GPS or a WWVB based one, such as this one or a gps based one. -
Re:Setting the clock initiallyHow did they figure out how to set the clock initially? Thanks.
Atomic clocks count the number of vibrations within an atom, so know how much time has passed to a high degree of accuracy. Absolute time however, cannot really be known, as we have no reference point to measure it from (unless we find someone who has been counting since the big bang happened!).
The standard day-to-day time system is UTC (rather mysteriously standing for Coordinated Universal Time) and it is based on the rotation of the earth. This is decided by the BIPM. As the length of a day is not precisely divisible by a second, leap seconds occasioanlly have to be added.
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Re:Setting the clock initiallyHow did they figure out how to set the clock initially? Thanks.
Atomic clocks count the number of vibrations within an atom, so know how much time has passed to a high degree of accuracy. Absolute time however, cannot really be known, as we have no reference point to measure it from (unless we find someone who has been counting since the big bang happened!).
The standard day-to-day time system is UTC (rather mysteriously standing for Coordinated Universal Time) and it is based on the rotation of the earth. This is decided by the BIPM. As the length of a day is not precisely divisible by a second, leap seconds occasioanlly have to be added.
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Re:Heres why.
No.
In your analogy, the chip itself would be defining its own frequency, which isn't how PC clocks work.
See this page for more information. However an excerpt from this page verifies my explanation:
Time Losses in System Clock on Windows 95-Based Computers
The system clock on a Windows 95-based computer may experience a cumulative loss of time.
When you run the Date/Time tool in Control Panel, the computer's real-time clock (RTC) is updated using the MS-DOS system time. Because the RTC is being updated by a device that is less accurate, a cumulative loss of time can occur over a period of time.
The MS-DOS system time is accurate to 1/18 of a second. Each time you use the Date/Time tool, an incorrect time is written to the computer's RTC. The amount of time lost depends on how often the Date/Time tool is opened and the amount of time since it was last opened.
For standalone computers, this may not be much of a problem. However, with network programs that rely upon time and date stamps to ensure the proper file is accessed, this can cause problems over a period of time.
Synopsis of Microsoft Knowledge Base Article ID: Q157619
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Time Shifts Can Be A Matter Of Life Or Death
I know where you are coming from! This time shift has been a major headache for me at work. My group installs computer systems at emergency management agencies (EMAs) that selectively trigger radios by a precoded geographical zone or serial number. We have a security feature in our broadcast that is basically a time stamp - the radio rejects a broadcast if the timestamp is more than 5 minutes off its internal clock. This prevents somebody from taping a monthly test message and rebroadcasting it at three in the morning to falsely trigger the radios. Well, at the EMAs they just want to sit down at the PC during an emergency and click on a button - so the PC is ignored until it's really needed and then they don't want to waste time checking to see if the clock has jumped. If it has, oops, the broadcast timestamp doesn't match and the radios don't trigger!!!
We have never figured out how to stop the computer time from jumping and if anyone else has, please let me know! The workaround solution we've come up with is to either install a network time update program running in the background if the computer is on the web (for examples, search for "time sync" hereor for the more common rural EMAs that have no Internet connection, we install clock boards. We have found three sources for clock boards: Beagle Software, OutSource and ICS Advent. The Beagle product is ISA only, the OutSource product only works with Win 2000/NT (not Win 95/98) and the ICS product is far and away the most expensive. If anybody knows of others besides these three, please let me know!