Kim 1

[drlegendre .]

"On 2/17/2016 3:32 PM, drlegendre . wrote:

> On the LabVolt SBC, there's a little keylock on the lower, left of the
> board. What's the purpose of the lock? Are there costly (RAM?) chips inside
> there, or...?
>
DIP switches, since it's a trainer, it appears they are used to create
"faults" to troubleshoot."

Just to be clear - you +know+ for a fact there are DIP switches inside, but
you only +surmise+ they are for creating fault conditions?

As mentioned, I was thinking either pricey components or possibly some sort
of anti-theft device.. opening the door exposes a feature that allows the
unit to be tethered to a bench.

This is before the days of commodity EEPROM, so it's not like they need to
write-protect firmware, resident software, etc.

On Wed, Feb 17, 2016 at 5:33 PM, william degnan <billdegnan at gmail.com>
wrote:

> I've got one too, but please don't contact me about it.  Seriously. I will
> never tell you the super magic secret.  Forget I said that.
>
> On Wed, Feb 17, 2016 at 5:39 PM, jwsmobile <jws at jwsss.com> wrote:
>
> >
> >
> > On 2/17/2016 1:32 PM, drlegendre . wrote:
> >
> >> Maybe we can salvage this thread..
> >>
> >> If you +do+ happen to be interested in owning an SBC / digital computer
> >> trainer, there are still quite a few Heathkit ET-3400 up on eBay at the
> >> moment. Prices have come up a bit - though not much - from a year ago,
> >> when
> >> they were selling for ~$40.00 USD.
> >>
> >> Nice little units, and full documentation is freely available.
> >>
> >> Now a question..
> >>
> >> On the LabVolt SBC, there's a little keylock on the lower, left of the
> >> board. What's the purpose of the lock? Are there costly (RAM?) chips
> >> inside
> >> there, or...?
> >>
> >> I've got the 68HC11 version of the ET-3800 just acquired for probably
> > more than I should have.  Anyone have any software / experience with
> them?
> >
> > There appears to be a big box on Ebay for sale (x a couple of units for
> > sale separately) for this as well, or maybe it is for the 3400.
> >
> > I'd be interested in what people have.  Mine came with the processor
> > personality and the memory module only.
> >
> > thanks
> > Jim
> >
> >
>
>
> --
> @ BillDeg:
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>