Re: real time and IIC

Article View: comp.sys.acorn.tech

Article #404

Back to comp.sys.acorn.tech Previous Next

#404

From: Professor Coypu
Date: Thu, 12 Nov 1992 16:35

18 lines
1268 bytes

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.
-- 
+-------------------------------------------------------------------+
| Alun Jones, Computer Science Dept. | Email : auj@uk.ac.aber       |
| U.W. Aberystwyth, Wales            | GW1URF (Packet coming soon!) |
+--Hi, I'm a signature Virus :-) Copy me into your sig to join in.--+

Technical Details

Message-ID: <1992Nov12.163520.4583@aber.ac.uk>

Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!uknet!gdt!aber!auj

References: <BxEEC3.2xM@brunel.ac.uk>

Show Full Headers

Complete Article Headers

Path: arc1-ca.pugleaf.net!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

Reply to Parent Message