13 Dec
2012
13 Dec
'12
12:55 p.m.
Always wondered if that was the case. I've got
plenty of ADB
keyboards lacking cables and plenty of S-Video cables. So both ADB
and SVid are wired straight-through?
Yes, but there is a Gotcha.
The apple cable puts 4 separate signals on the 4 pins -- I think it's
power, grounds, serial data and the on-button. An S video cable has 2
signals (luma and chroma) and 2 grounds. It's not unheard-of for S-vido
cables to have the ground connected together, in which case they cause
ADB syutemns to think the power button is held down (IIRC).
-tony