However, what you can't use is an S-video
switchbox as a cheapo K-M switch.
So here's today's trivia question: when I did this, the system kept acting
like I was pressing the power button. :)
I'll make a guess at this... The S-video conenctor has 2 ground pins,
which are normally strapped together inside devices like switchboxes. I
am assuming that on the ADB conenctor, one is ground, the other is the
power-on line. So when you connect ths ADB cable to n S-video switchbox,,
you get the power-on pin groudned al lthe time.
The same principle allows you to create an "ADB boot dongle" for non-MacOS
systems. My 7300 NetBSD system had one plugged into the keyboard, since
NetBSD would ignore that, and even if the PMU was not working correctly it
would always boot it after a power failure.
I'm guessing this is a 4 pin mini-DIN with the appopriate 2 pins wired
together. Or a bent paperclip stick into the correct 2 contacts of the
socket ;-)
-tony