help - 11/34 console problem -- CNTRL key behaviour - test-drb@ccmp.vtda.org

10 Nov 2005

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Subject: RE: help - 11/34 console problem -- CNTRL key behaviour
   From: "Gooijen, Henk" <henk.gooijen at oce.com>
   Date: Thu, 10 Nov 2005 14:44:52 +0100
     To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at
classiccmp.org>

Allison wrote: 

  Well it does not have to be a clock.  It happend
the product 
 I was working on was a time code display for video tape where 
 the display could be time or number of frames.

 Besides the display system for PDP-11 is likely OCTAL. ;) 
True, but the latch that outputs the 3 bits for the 7447 has
a fourth output which could be used! Take that 4th output to
the 7447 'D' input (which is now connected to GND) and you
can display an "8" or a "9".  But I am drifting off-topic --
the console must work for starters :-)

- Henk, PA8PDP. 
The whole point of the clock thing is simple code to make a 
repeated operation that traces esily with scope or logic 
analyser. 

Allison