Here it is http://www-03.ibm.com/ibm/history/exhibits/cc/cc_intro.html
Paul Feller AIT Mainframe Technical Support [EMAIL PROTECTED] (319)-355-7824 -----Original Message----- From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of David Boyes Sent: Friday, July 27, 2007 11:38 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: IBM Clocks was: Re: Way OT: One Room Schools > But what if, we decided to make the IBM clocks functional again. > Is there a documentation source, or other info on how these things work? The URL on IBM clocks someone posted earlier in this thread has very detailed maintenance docs on how the master clocks function. It's basically a pulse generator at 2 second intervals, but at a relatively high voltage and current for modern solid-state control. Not difficult, but parts will be expensive to control that many solid-state relays and associated power supplies.
