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From: ACS19@UHUPVM1.BITNET
Newsgroups: net.micro.atari16
Subject: keyboard clock
Message-ID: <8608230007.AA28185@ucbvax.Berkeley.EDU>
Date: Fri, 22-Aug-86 13:35:40 EDT
Article-I.D.: ucbvax.8608230007.AA28185
Posted: Fri Aug 22 13:35:40 1986
Date-Received: Fri, 22-Aug-86 23:49:41 EDT
Sender: daemon@ucbvax.BERKELEY.EDU
Reply-To: ACS19%UHUPVM1.BITNET@WISCVM.WISC.EDU
Organization: The ARPA Internet
Lines: 14

The mod just posted is not the best way to get the keyboard chip to keep the
time.  Youy must keep the reset pin high on the chip when the power is off, or
the time will just freeze.  To do this, I have used a nand gate circuit.
Adding another reset button is silly (in my opinion) when it could be done with
the proper circuit.  Also, the reset line must go low when you hit the rest
button, or the keyboard will not work correctly.  I will post the mod this
weekend, so all can see.

And yes, their are two different versions of the chip, I have had two in my
hands, one says V01  and the other says V02.  To me that is two different chips
Perhaps the little chip on the keyboard is different, but the appears to be
a simple buffer (the little chip by the 6301).

Mike