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Additional Pictures 

 

Complete Display Scanning Cycle of the µPD947 from a Royal 91K (Model UA122) manufactured in September 1975 displaying "-104.679"
and captured with the Digilent Digital Discovery connected to the DCM-50A Platform. µPD947 Clock Frequency at 50 kHz.
Close-up view of the transition between Digit D1 displaying "9" and Digit D4 displaying "4" of the µPD947 showing the Leading and Trailing Digit Blanking Times.


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© Joerg Woerner, January 25, 2025. No reprints without written permission.