Be careful after turning off the computer and
don't pull the cards
until you are sure the voltage levels have dropped
For that matter, if yours has a power switch on the front panel, be
careful what you touch in the vicinity of that switch, even after
you've turned it off!
The rightmost switch was truly a "user wires it how he wants" switch,
and when you bought an IMSAI it came with artwork to let you make a
transparency layer that matched the function you chose. (Which is
why I find these arguments about keeping original front panel
transparencies so amusing.)
Tim.