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From: neil@amiga.UUCP (Neil Katin)
Newsgroups: net.micro.amiga
Subject: Re: Amiga clock based on AC frequency?
Message-ID: <946@amiga.amiga.UUCP>
Date: Thu, 3-Apr-86 16:28:26 EST
Article-I.D.: amiga.946
Posted: Thu Apr  3 16:28:26 1986
Date-Received: Sat, 5-Apr-86 11:22:47 EST
References: <1665@caip.RUTGERS.EDU>
Reply-To: neil@rocky.UUCP (Neil Katin)
Organization: Commodore-Amiga Inc., 983 University Ave #D, Los Gatos CA 95030
Lines: 26

In article <1665@caip.RUTGERS.EDU> daemon@caip.UUCP writes:
>From: "John G. Ata" <Ata@RADC-MULTICS.ARPA>
>Does anyone know how the Amiga clock keeps track of time?  I had a
>strange situation which could either mean the Amiga is broken, or not
>depending on how the Amiga keeps time.  Seems that I noticed time on the
>Amiga was going along at twice the normal rate.  Watching the clock
>program, or polling the system for the time all showed each second on
>the system clock taking 1/2 a real second.  Now, switching to another
>power outlet in another room solved the problem, but I have never been
>able to duplicate it again on the original outlet.  If the Amiga keeps
>track of time via the AC frequency, then it is possible (I think) that
>inadequate grounding could explain this phenomena (My three prong
>converters are not really connected to a ground yet).  If, however, the AC
>is converted to DC immediately on entrance and the AC frequency is not
>used, then I may have an Amiga problem.  Any comments would be
>appreciated.
>
>                    John G. Ata


The amiga keeps track of time based by counting AC transitions from
the power supply (and therefore from the power lines).  I bet that
you have a defective socket or a really noisy line on that outlet.

	Neil Katin
	pyramid!amiga!neil