Ha ha Jacco, multimeter - why didn't i think of that
Another recommendation is a good magnifying glass - on the 'inner' face of the PCB I can just make out "JPR" by the two holes. I wonder if any jumper was ever supplied with this early version of the A-180
No real surprise I guess that it is the two holes that need to be bridged.
A ten minute job in my workshop and now I have a fully functioning 1 x1:8 multiple. A very efficient way to distribute clock pulses from my A-154.
Cheers,
Nick