Messages in this thread | | | Date | Fri, 18 Dec 1998 18:11:59 -0500 (EST) | From | Robert Minichino <> | Subject | Re: unexplained keyboard crashes |
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> On Fri, Dec 18, 1998 at 05:18:25AM +0000, H. Peter Anvin wrote: > > Actually, one of the requirements for the "Designed for W*nd*ws 9x" > > logo is that the keyboard and mouse ports have current limiters so > > they can be swapped at runtime. > > ... which may just be a SMD soldered fuse and burn away and make it hard to > repair for somebody not having SMD equipment? > > Or do you mean real electronic current limiter? > Would be something positive about this logo I don't like ...
Real electronic current limiter, like, uhm, a resistor? *grin*
Then again, I wouldn't doubt if MB designers did leave out something so trivial as a resistor. It's fairly common practice to work off of the examples in the app notes, so if the keyboard controller had a mistake in the app note example for the secondary device port (not uncommon), it bit a bunch of people in the ass. Cut-and-paste design strikes again. :)
(PS: Hmm, wasn't the implementation of the NE2000 based on the app note for a certain National Semiconductor IC?)
-- Robert Minichino Chief Engineer Denarius Enterprises, Inc. http://www.denarius.com/
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