Nice story, Steve! The second computer I ever worked on (lots of times!) had a similar "goto" deal - the adress of the next instruction on the disk depended on the execution time of the current instruction (people who've only ever worked with RAM will have a hard time with this concept!). We got a machine in one day, from the factory in the US,
with a 60-Hz pulley on the disk drive motor - the thing went berserk at power-on. It took a while to find!

Ah, this legacy (ha! archeology, more like!) stuff!

Richard

BTW, commenting one of the Apollo space flights, James Burke once mentioned an "E-memory dump" - our computer did that too, so we were fantasysing about one of our machines flying round the moon!