nanog mailing list archives
Re: REMINDER: Leap Second
From: Barney Wolff <barney () databus com>
Date: Sun, 25 Jan 2015 18:06:49 -0500
On Sun, Jan 25, 2015 at 02:24:52PM -0800, Stephen Satchell wrote:
Today's computers don't use clocks derived from 50- or 60-hertz power-line frequency. The last computer I remember seeing with such a clock was the IBM System/360. The System/370 used a motor-generator set for the power supply, so it had to get its real-time clock time source another way.
The 360/95 and /91 also used 400 Hz from a motor/gen. Water cooled, too. One of my fondest war stories is when the power was turned off for July 4th weekend but the water was left on.
Current thread:
- REMINDER: Leap Second Jay Ashworth (Jan 25)
- Re: REMINDER: Leap Second Mike. (Jan 25)
- Re: REMINDER: Leap Second Karsten Elfenbein (Jan 25)
- Re: REMINDER: Leap Second Ken Chase (Jan 25)
- Re: REMINDER: Leap Second Joe Klein (Jan 25)
- Re: REMINDER: Leap Second Karsten Elfenbein (Jan 25)
- Re: REMINDER: Leap Second John Levine (Jan 25)
- Re: REMINDER: Leap Second Valdis . Kletnieks (Jan 25)
- Re: REMINDER: Leap Second Ken Chase (Jan 25)
- Re: REMINDER: Leap Second Stephen Satchell (Jan 25)
- Re: REMINDER: Leap Second Barney Wolff (Jan 25)
- Re: REMINDER: Leap Second TR Shaw (Jan 25)
- Re: REMINDER: Leap Second Barney Wolff (Jan 26)
- Re: REMINDER: Leap Second John Levine (Jan 26)
- Re: REMINDER: Leap Second Barry Shein (Jan 26)
- Re: REMINDER: Leap Second Mike. (Jan 25)