Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!ean-relay.ac.UK!trevor
From: trevor@ean-relay.ac.UK (Trevor Peacock)
Newsgroups: comp.sys.atari.st
Subject: Mega-ST real time clock.
Message-ID: <8905081315.AA24176@ucbvax.Berkeley.EDU>
Date: 8 May 89 12:34:45 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 12

Hello,
  Can anyone tell me how the internal clock is implemented in the Mega STs?
I understand that it has a battery backed clock, but if this is just a
circuit to keep the keyboard chip in sleep mode ( as all the internally
fitted clock kits i have come across are ) then the current drain would be
too much for batteries to maintain for more than 2-3 weeks.  The other type
of clock I have come across uses the cartridge port - I'm sure Atari would
not start putting things in that part of the memory map.  So, does the Mega
have a clock chip sitting tucked away in some remote part of the memory map,
or does it just have a car battery with jump leads to the keyboard chip? 
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Trev..    trevor@uk.ac.ean-relay