I think you two are talking different versions of the Elf: Eric is talking
specifically about the Elf 2000 whose circuit design has been modified
considerably from the original version Dwight appears to be referring to.
For my part, when I refurbished a period homebrew implementation (someone's
high school project) I relabeled the switches to indicate all 4 of the
functional states of the 2 switches rather than the somewhat inexplicable
"LOAD" and "RUN".
http://www.cs.ubc.ca/~hilpert/e/cosmacElf/index.html
On 2016-Apr-23, at 4:09 PM, dwight wrote:
> Lf it were mine to make, it would be a spring return
> momentary SPDT. NC would be ground and NO would be +5V,
> as per the schematic.
> I'm not sure what the manual says about it.
> It is debounced with a jam latch, as per schematic.
> Tinker Dwight
>
>
> ________________________________________
> From: cctalk <cctalk-boun...@classiccmp.org> on behalf of Eric Smith
> <space...@gmail.com>
>
> On Sat, Apr 23, 2016 at 11:28 AM, dwight <dkel...@hotmail.com> wrote:
>> I looked at the schematic pdf and it looks right.
>> The ground lead is the NC.
>
> It's an SPDT toggle. Neither the NC or NO pin of the switch should be
> tied to ground; it's the common pin that's grounded. So for a toggle
> switch, which side is NC and which is NO?
>
> Anyhow, apparently if I'd read it more carefully, it is explained in the
> manual.
