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- Path: sparky!uunet!stanford.edu!rutgers!cbmvax!grr
- From: grr@cbmvax.commodore.com (George Robbins)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: A4000 Hardware questions
- Message-ID: <36791@cbmvax.commodore.com>
- Date: 7 Nov 92 18:31:01 GMT
- References: <AHANSFOR.92Oct8001638@ee.WPI.EDU> <35683@cbmvax.commodore.com> <1992Oct09.155250.17752@zds-oem.zds.com> <35848@cbmvax.commodore.com> <3alu03kxadYJ00@amdahl.uts.amdahl.com> <36134@cbmvax.commodore.com> <PpYUr*Ed1@caleb.UUCP>
- Reply-To: grr@cbmvax.commodore.com (George Robbins)
- Organization: Commodore, West Chester, PA
- Lines: 26
-
- In article <PpYUr*Ed1@caleb.UUCP> jdp@caleb.UUCP (Jim Pritchett) writes:
- > In article <36134@cbmvax.commodore.com>, George Robbins writes:
- > > Basically, the interface circuitry is not "bullet-proofed" to support
- > > "hot insertion". You subject little itty-bitty IC's with microns thick
- > > insulating and conductive material to thousands of volts of static
- > > discharge (low current) or 50-250 volts of ground potential difference
- > > (2 wire plugs or reversed grounds, short - high current pulses), when
- > > a signal pin makes contact before a properly grounded cable / connector
- > > shell.
- >
- > Stupid question:
- >
- > Would the risk be reduced significantly if the cable shell had a ground wire
- > connected to the Amiga shell BEFORE cable insertion? (e.g. attach a ground
- > wire to the cable shell and to the Amiga case before attaching the cable
- > to the connector.)
-
- It would be reduced somewhat, assuming that the shell made contact first,
- instead of touching the shell to one of the signal pins. "Good" shielded
- cables do have the shells grounded, but neither you nor I have any control
- over what cables the customer ends up with.
-
- --
- George Robbins - now working for, work: to be avoided at all costs...
- but no way officially representing: uucp: {uunet|pyramid|rutgers}!cbmvax!grr
- Commodore, Engineering Department domain: grr@cbmvax.commodore.com
-