DK Jr stuck when HSSK installed

WodNad

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East Weymouth, Massachusetts
(see video below)

When I remove the HSSK and put my Z80 in, the Jr board works fine, no issues at all.

Joe from HighScoreSaves was nice enough to send me 2 different kits, one with a Z80.
Same result with 2 different high score save kits, and 2 different Z80's.
Looks like an upside down test screen, you can see values change when I hit P1 button.

This cab also has a DK board, with a D2K kit.
This board works fine, with no issues.

Video with the DK Jr high score save kit installed.
(does SAME thing with 2 different HSS kits)

https://www.youtube.com/watch?v=x6eMnEKmC3o
 
Last edited:
Just an FYI.
I received the return kit and plugged in my bench. Works 100%

Leads me to believe that the socket or power voltages are off in your cab.
 
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