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- Path: sparky!uunet!mcsun!uknet!gdt!aber!auj
- From: auj@aber.ac.uk (Professor Coypu)
- Newsgroups: comp.sys.acorn.tech
- Subject: Re: real time and IIC
- Message-ID: <1992Nov12.163520.4583@aber.ac.uk>
- Date: 12 Nov 92 16:35:20 GMT
- References: <BxEEC3.2xM@brunel.ac.uk>
- Organization: Prifysgol Cymru (University of Wales) Aberystwyth
- Lines: 18
-
- In an earlier article ee91mds2@brunel.ac.uk (Mark D Smith) writes:
-
- >This sounds a rather odd problem, why should the RTC only stop counting when
- >it is being powered from the battery rather than the mains?
-
- The Arc reads the RTC when it powers up, but for speed it keeps
- a software copy of the clock in memory while it is turned on. So the clock
- could have `seized up' at a certain figure and this figure would be read
- at each power on, but counted forwards normally from then on under interrupt
- control. (What I think I mean is that *every* time the machine reboots it
- would start counting from the same point)
-
- Alun.
- --
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- | Alun Jones, Computer Science Dept. | Email : auj@uk.ac.aber |
- | U.W. Aberystwyth, Wales | GW1URF (Packet coming soon!) |
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