I turned the decoder over to reverse the pins and it is much worse that way. Totally dead, no reaction, no lights, F0 does not respond, no movement on address 3.
The loco shows which pin is which on the dummy plug and the loco board, as shown here, top picture.
The decoder does not, as previously seen. But there is a nice picture. Now that shows the chip in the same orientation as the dummy plug, pin side down.
However, it would be really helpful if, for example, "motor right" said Pin 1 also. Unless that is wrong.
Please tell me if Motor Right is Pin 1, or Pin 6.