[Coco] IDE interfaces

[Louis Ciotti]

Maybe their issue with gold is that it will wear off quicker (since it is a
softer metal) from repeated insertion/extraction cycles.

On Wed, Mar 16, 2016 at 3:40 PM, Dave Philipsen <dave at davebiz.com> wrote:

> I wholeheartedly agree with you.  It would take a lot of convincing to
> make me believe that gold edge connectors are going to wear out the cart
> port more quickly.  And almost all manufacturers of electrical connectors
> offer gold-plating as a means of making the connection more reliable.  I
> remember many years ago running my fingers across the contacts of those
> cheapo cartridges and getting a grey-colored stain on my fingers from the
> corrosion.  I've worn a gold-alloyed wedding ring for years and never had
> any kind of stain on my fingers from it.
>
> My question to the Facebooksters would be: Why did Intel use gold plating
> on millions if not billions of their processors that were intended to mate
> with sockets?  Perhaps they could do a little research on galvanic
> corrosion and the anodic index of tin
> https://en.wikipedia.org/wiki/Galvanic_corrosion. An inspection of the
> edge connectors on three of my CoCo 3s reveals that they all appear to have
> some amount of gold on the contacts. At least Tandy got that part right.
>
>
> Dave
>
>
>
> On 3/16/2016 2:15 PM, Zippster wrote:
>
>> Gold edge connectors are bad, haven’t you heard?
>>
>> Just kidding, but there’s been a small discussion on the Facebook group
>> where it’s being claimed
>> tin-plated is better and won’t wear out your CoCo’s cart port connector
>> as quickly as gold.  And that
>> that is why Tandy didn’t use it most of the time, not because of cost.
>>
>> Personally I don’t  buy it, I think gold plated edge connectors are the
>> way to go, even though they
>> cost a bit more.  You can certainly argue it’s not necessary, but worse?
>> lol.
>>
>> - Ed
>>
>>
>> On Mar 16, 2016, at 1:47 PM, Dave Philipsen <dave at davebiz.com> wrote:
>>>
>>> One thing I noticed about the MiniIDE is that there is no gold on the
>>> edge connector.  This is a mistake that shouldn't be repeated if someone
>>> decides to design a replacement.
>>>
>>> Dave
>>>
>>>
>>> On 3/15/2016 6:28 PM, RETRO Innovations wrote:
>>>
>>>> It'd be interesting to see how small one could make the interface. If
>>>> one used a flash ROM IC and a CPLD, I think one could put an IDE controller
>>>> with IDE and CF into a 2.2"x2" form factor.  That's be small enough for any
>>>> use, no?
>>>>
>>>> JIm
>>>>
>>>>
>>>> On 3/15/2016 12:51 PM, Tormod Volden wrote:
>>>>
>>>>> On Tue, Mar 15, 2016 at 5:29 PM, Bill Pierce wrote:
>>>>>
>>>>>> Some of the Brazillian Coco guys used the schematic from the Glenside
>>>>>> unit and made a more "modern" solution that was smaller wih less parts (and
>>>>>> fit the slot better). Maybe we could talk them into letting go of the
>>>>>> schematic and get Ed to whip some up :-)
>>>>>>
>>>>> Here are some pictures of both the original Glenside board and the
>>>>> Brazilian "MiniIDE": http://amxproject.com/?p=2585
>>>>> Some people would probably prefer the big original with "integrated
>>>>> MPI" and DIP40 chips, but I'd also be interested in the MiniIDE. Or
>>>>> even a CPLD-based remake...
>>>>>
>>>>> Tormod
>>>>>
>>>>>
>>>>
>>> --
>>> Coco mailing list
>>> Coco at maltedmedia.com
>>> https://pairlist5.pair.net/mailman/listinfo/coco
>>>
>>
>>
>
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