[comp.sys.mac] Plugging in ADB devices

kehr@felix.UUCP (Shirley Kehr) (09/29/88)

This is partly a test to see if there really are zero articles in comp.sys.mac.
For a group that posts 30 to 50 articles a day, how can there be no articles
on 9/28/88.

Now, since this will probably go out anyways (even if I never see it), I'll
make it worth your time.

The September issue of Macintosh II Report (Thom Hogan and Michael Swaine)
says that "Plugging anything into the Apple Desktop Bus while the system is
running can harm the Macintosh II's motherboard. This means that you shouldn't
plug or unplug either the keyboard or the mouse while the system is running."

This advice is given in response to two readers who asked (1) if it was OK
to switch from the mouse to a trackball while using a CAD program and (2)
whether the dealer was telling the truth about the owner damaging his own
motherboard by plugging in the mouse while the computer was running.

Has anyone else heard or read this before?  If there are no cautions in the
manual about this, are you really responsible for any damage that occurs?

Hope I see this at FileNet.  (I still don't believe zero articles.)

Shirley Kehr

ech@poseidon.UUCP (Edward C Horvath) (10/04/88)

From article <60676@felix.UUCP>, by kehr@felix.UUCP (Shirley Kehr):
> The September issue of Macintosh II Report (Thom Hogan and Michael Swaine)
> says that "Plugging anything into the Apple Desktop Bus while the system is
> running can harm the Macintosh II's motherboard. This means that you shouldn't
> plug or unplug either the keyboard or the mouse while the system is running."

I haven't heard of this happening to anyone.  What CAN happen, and is
documented by Apple, is that plugging/unplugging can cause a spurious
reset, and that the software that manages the ADB only polls for devices at
system startup, so you may not get what you hope for.

I have moved keyboards off of and onto a Mac II and an SE while they were
running.  Both keyboards were Apple, although one was a IIGS keyboard (yes,
they work fine) and one was the Mac "standard" ADB keyboard.  Usually it
works, sometimes it doesn't.  Haven't fried anything yet...

=Ned Horvath=

wetter@tybalt.caltech.edu (Pierce T. Wetter) (10/06/88)

>running.  Both keyboards were Apple, although one was a IIGS keyboard (yes,
>they work fine) and one was the Mac "standard" ADB keyboard.  Usually it
   I nominally work for the guy who developed ADB, Mike Clark.
   The difference between the IIGS keyboard and the SE keyboard is an inch
of plastic all the way around. Seems the marketing types didn'' think that the
little GS keyboard would sell well. Looks to much like a "toy".
  The project to add the inch of plastic even had its own codename, which
escapes me at the moment.

 Another Tidbit: He started working on the Mac II keyboard in 1984.

Pierce
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