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- Path: sparky!uunet!spool.mu.edu!darwin.sura.net!gatech!destroyer!cs.ubc.ca!fs1.ee.ubc.ca!jmorriso
- From: jmorriso@ee.ubc.ca (John Paul Morrison)
- Subject: (epoxy) Re: "The Glob" Atari 2600 processors ???
- Message-ID: <1992Dec23.214036.10066@ee.ubc.ca>
- Organization: University of BC, Electrical Engineering
- References: <kennehra.724614930@craft.camp.clarkson.edu> <BzJExG.40D@zoo.toronto.edu> <1h3dv3INN53h@rave.larc.nasa.gov>
- Date: Wed, 23 Dec 1992 21:40:36 GMT
- Lines: 38
-
- In article <1h3dv3INN53h@rave.larc.nasa.gov> kludge@grissom.larc.nasa.gov (Scott Dorsey) writes:
- >In article <BzJExG.40D@zoo.toronto.edu> henry@zoo.toronto.edu (Henry Spencer) writes:
- >>Apart from the possibility of deducing the chip type by studying the rest
- >>of the circuit, the only way to find out is to get the epoxy off. That
- >>is Not Easy. The stuff is completely inert as far as the usual run of
- >>solvents etc. are concerned. It can be done, using truly vile chemicals,
- >>but it's not the sort of thing you want to try unless you really know
- >>what you're doing.
- >
- >You can do it with DMSO. I have reverse-engineered a number of potted
- >modules by soaking them in DMSO. Note that DMSO will also remove the
- >epoxy board underneath if you aren't very careful about it, and will also
- >(in the case of more complex modules) remove the coating from resistors
- >and capacitors making them difficult to read values from.
-
- What's DMSO? (I wan't to say dimethylsulfoxide, but I'm just guessing from
- a small inventory of knowledge)
-
-
- >
- >DMSO is readily available at your local health food store. Note that the
- >solution of epoxy in DMSO is lethal and can be absorbed through the skin.
- >Use with proper ventilation, eye and skin protection. Very, very nasty
- >stuff.
-
- Can you be more precise? Does th epoxy, DMSO stuff have a MSDS (material
- safety data sheet, I don't know what OSHA in USA calls it)
-
- >--scott
-
-
- --
- __________________________________________________________________________
- John Paul Morrison |
- University of British Columbia, Canada |
- Electrical Engineering | .sig file without a cause
- jmorriso@ee.ubc.ca VE7JPM |
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