[Techtoolslist] What's happening with old 2716/2732

[Rodger Boots]

People stayed away from the cameraman when he was working.

Was looking at a site that sells lightbulbs and the DID have some
flashtubes listed as UV flashtubes.

On Tue, Oct 25, 2022 at 5:53 PM Dave McGuire <
mcguire at mcguirescientificservices.com> wrote:

>
>    I'd bet they were special flashtubes, and I'd further bet that there
> was something else going on with those 2716s.  That much UV would've
> also rendered any people nearby at least partially blind, and that'd
> never have made it out into the consumer camera world.
>
>             -Dave
>
> On 10/25/22 18:48, Rodger Boots wrote:
> > My job, at the time, was with Rockwell Collins Radio which was showing
> off
> > their WXR700 weather radar (used by Boeing in their large jet planes.
> The
> > company photographer took the promo photos then the unit was set up for
> the
> > demonstration.  It was dead as a doornail.  All 10 2716 EPROMS were
> > erased.  They reloaded the software and everything ended up working.
> >
> > We didn't have them, but there were manufactures of EPROM erasers that
> used
> > flashtubes that they claimed could erase a batch in about 5 seconds.
> They
> > may have been special flashtubes, I don't know for sure.
> >
> > On Tue, Oct 25, 2022 at 2:06 PM Dave McGuire <
> > mcguire at mcguirescientificservices.com> wrote:
> >
> >>
> >>     Same here.  Xenon flash tubes don't produce much energy at the
> ~250nm
> >> wavelength required for EPROM erasure; their emission spectrum typically
> >> falls off at about 350-400nm.
> >>
> >>     They'll crash if photographed while running, sure, but that's due to
> >> all of those transistors' junctions acting like photodiodes for a few
> >> milliseconds.  But no erasure will occur.
> >>
> >>                -Dave
> >>
> >> On 10/25/22 15:01, Andrew Welburn wrote:
> >>> I have photographed games running on my bench with the flash on and
> >> exposed windows plenty of times. Older games can freak out and
> crash/reset
> >> but there’s never any long term damage. Nintendo weren’t stupid,
> uncovered
> >> windows are not a great issue unless you have the exact wavelength of
> light
> >> for the needed exposure period at the right strength. The reality is in
> >> common use you are unlikely to encounter that set of variables lining
> up to
> >> cause damage.
> >>>
> >>> Andrew Welburn (mobile)
> >>>
> >>>> On Oct 25, 2022, at 9:53 AM, John Robertson via Techtoolslist <
> >> techtoolslist at flippers.com> wrote:
> >>>>
> >>>> On 2022/10/24 8:41 p.m., Rodger Boots wrote:
> >>>>> I'm more surprised more Nintendo games haven't had this problem.  All
> >> it
> >>>>> takes is a lack of window covers and an old-fashioned flash camera.
> >>>>
> >>>> That's interesting - if a strobe tube (like used in a camera flash can
> >> actually erase the older EPROMs...I'll have to test that out today. I
> have
> >> these pistols and rifles that use focused strobe tubes to illuminate CDS
> >> cells on their targets for a large scale shooting gallery I own on a
> local
> >> midway (Pacific National Exhibition - Vancouver, BC). So it is an easy
> >> thing to fire up - so to speak!
> >>>>
> >>>> John :-#)#
> >>>>
> >>>>>
> >>>>>> On Sat, Oct 22, 2022, 8:56 PM Jose Luiz Martins <
> >> joseluizmartins at gmail.com>
> >>>>>> wrote:
> >>>>>>
> >>>>>> Hi folks
> >>>>>>
> >>>>>>
> >>>>>> Got some old 1980's Taito boards to fix and surprise! All 2716 are
> >> blank!
> >>>>>> This happened with about 5 boards and more than 40 ICs most of them
> >> are
> >>>>>> 2716 but some 2732 too.
> >>>>>>
> >>>>>> Do you guys is experiencing something like this?
> >>>>>>
> >>>>>>
> >>>>>> Thanks!
> >>>>>>
> >>>>>> JL
> >>>>
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> >>
> >> --
> >> Dave McGuire
> >> McGuire Scientific Services, LLC
> >> New Kensington, PA
> >>
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> --
> Dave McGuire
> McGuire Scientific Services, LLC
> New Kensington, PA
>
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