Pinout of early decoder


Can anyone tell me the pinout of a Rev 7 decoder, wider and shorter than the normal one.
It has 2 caps mounted inboard and a chip labeled U28B  (C) 2005.
It has the 2-pin speaker and track sockets labeled, but there is a 4-pin socket next to the chip and an 8-pin socket at the opposite end.
Which is the motor, power, headlight & rear-light, etc?

Thank you.

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