Wow what a blast from the past - cut my teeth on those old 380z machines pissing about with the ones at my dads work when waiting for him to finish. Brought back some real memories - thanks for posting the pics muguk. Seem to remember they have a rather terse single char boot command sequence - or am I mistaken ?
Yeah, the 380Z and 480Z LINK machines had an odd boot sequence.
You typed a single character command.
If I remember correctly:
B was to boot from disk,
L was to load a cassette and
R was to run the ROM version of BASIC.