클럭 카드라는 것이 있구나.

http://kldp.org/node/114363

/dev/rtc 이외에
별도의 타이머가 필요한 상황입니다.

pc 에 장착해서 쓸수있는 타이머 기능을 하는 하드웨어가 있을까요?

에 대한 답변으로

http://www.atomictimeclock.com/clockcard.php

ClockCard PCI Stable, real-time clock on a PC card Keeps accurate time without Internet access Features a temperature-compensated crystal oscillator working with a real-time clock with battery backup. Software keeps Windows time synchronized with real-time clock on ClockCard Single-user and network server versions available ISA version available PCI Card fits 5V slot - Not Compatible with 3.3V slots Overview: Beagle Software's ClockCard is an accurate, temperature-stable real time clock (RTC) complete on a PC card. Use ClockCard to dramatically improve the accuracy of your computer뭩 clock. ClockCard is based on a highly stable oscillator circuit and will maintain time on your PC to within 15 seconds/month error. If your computer is operating in a temperature-stable environment, error will be less than 2 seconds/month. Precise time synchronization of ClockCard can be done using ClockWatch. The most common application of the ClockCard is to maintain the correct time on a host computer. When installed with ClockWatch software, it will set the Windows operating system clock to the ClockCard clock time at a set interval. This allows the O/S and applications to access the correct time. ClockCard can also be used in conjunction with Beagle Software's ClockWatch Client/Server software to provide an internal time standard to service an entire enterprise. Key Features of ClockCard: Hardware corrects system that loses date or time when powered off. Provides correct date and time at boot up. Software corrects clock that loses time when powered on. On-board Dallas real time clock (RTC) takes the place of existing motherboard clock. Works with most PC hardware. Tested on Intel, AMD and Cyrix platforms. Integrated with ClockWatch to provide a two-leveled time standard. Time setting utility (included) lets you view or set time on ClockCard. Maintains correct date and time even with CMOS battery failure. Available in both newer PCI and legacy ISA slot versions. Now available! Drivers for Linux and SCO Unix. Pricing: Product Name Bus Bundled with Operating Systems SKU         Price ClockCard PCI Pro PCI ClockWatch Pro Windows 98SE/NT/2k/XP CCPCINT $259.95 ClockCard PCI Sentry PCI ClockWatch Sentry Windows 98SE/NT/2k/XP CCPCILock $269.95 ClockCard PCI Server PCI ClockWatch Server Windows 98SE/NT/2k/XP/2003 CCPCISrv $299.95 Star Card PCI Star Sync Server & GPS receiver Windows 98SE/ NT/2000/XP CCPCIGPS $895.95 Sale $795.95 ClockCard ISA ISA not applicable DOS/95/98/Me NT/2k/XP CC $75.95 Sale $59.95 Addtional Information:     PCI Version ISA Version Clockcard FAQ Using ClockCard with ClockWatch ClockCard frequently asked questions How ClockCard works ClockCard technical specifications Installation instructions Frequently asked questions about PC clocks Advanced features of PCI version Star Sync GPS timeserver View Specifications for these cards   Copyright © 2004 Beagle Software. All rights reserved

http://www.meinberg.de/english/products/gps170pci.htm

GPS170PCI : GPS Clock for Computers (PCI/PCI-X Bus) Image Zoom The Meinberg GPS170PCI slot card is the professional solution to your standalone computer synchronization requirements. Its various outputs like IRIG, serial time string or 1PPS can be used to provide synchronization to other devices. A powerful but easy to use API enables you to integrate a highly accurate time base in your own software and the two independent capture inputs add hardware timestamping of external events to your measurement application.

http://www.sonifex.co.uk/category/timeserver/index.shtml

Sonifex Mentor Server

Related Links:
Mentor Server & Client User Guide >
Mentor Server & Client Download >

The Mentor Time Server is software which runs on a
MS-Windows XP/Vista/Windows 7™ PC and synchronizes a number of MS-Windows XP/Vista/Windows 7™ PC client machines or Sonifex Net-Log units to its time. The client PCs or Net-Logs read the server time and have their time set using TCP/IP at regular intervals.

Clock Sources

Mentor Server can be synchronised to these reliable time sources:

• NTP (Time servers on the Internet)
• Global Position Satellite (using Sonifex GPS-1 Antenna)

For pricing information, please contact the Sales Department

Sonifex GPS-1 Antenna

The GPS-1 antenna is a small, light weight and portable ready to use high power GPS antenna.

• Magnetic mount integral to the unit
• Water resistant
• LED to show it is powered
• Powered from a PS2 (keyboard) connector
• Communicates with Mentor Server via RS-232
  serial port

http://www.meinberg.de/english/products/msf51usb.htm

MSF51USB : MSF Radio Clock for the Universal Serial Bus (USB) Image Zoom The MSF51USB is a MSF Radio Clock for USB in a compact plastic housing with an integrated MSF antenna, an (optional) external antenna can be connected to compensate degraded reception quality. This device is a perfect alternative for synchronizing computer systems where no PCI slot or serial port is available for time synchronization.