Here's another HD38820 game.  Nothing too terribly special except this
game has the record for the crappiest, cheapest PCB yet.  

The VFD is the first one I've seen with four different phosphors.  At
first I thought it was just three, but the green cube borders are a
darker green.

Another weird thing is the VFD was glued down with prodigeous use of
hot snot and this made removal and testing a bit tricky.  Ultimately
I got it off without damage except lifing two pads.  On reassembly I
repaired the pads and the display is fully connected again.

Plate 22 on the VFD is grounded so the cube highlights always are lit.