| Disk II cable interface pins [message #375032] |
Sat, 27 October 2018 04:15  |
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Originally posted by: Anthony Adverse
I have mentioned in other posts, I'm sitting on some 1/2 height 5.25" drives, I have a slight problem though. The 20 pin header on the drive has no identifying features, no way to tell where pin 1 is.
Does anyone know a quick way to figure that out?
Last post for the day, I need to unfold and unspindle my back now.. and have a few happy pills. (wave)
A
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| Re: Disk II cable interface pins [message #375040 is a reply to message #375032] |
Sat, 27 October 2018 09:40  |
Patrick Schaefer
Messages: 67
Registered: October 2012
Karma: 0
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Am 27.10.2018 10:15 schrieb Anthony Adverse:
> Does anyone know a quick way to figure that out?
Pin 1, 3, 5, 7 are connected together and Gnd. Pin 13, 15, 17, 17 are
+12 V.
So the row with the connected pins is odd, and this is where the pin 1
mark goes.
Patrick
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| Re: Disk II cable interface pins [message #375043 is a reply to message #375032] |
Sat, 27 October 2018 12:57 |
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Originally posted by: James Davis
On Saturday, October 27, 2018 at 1:15:03 AM UTC-7, Anthony Adverse wrote:
> I have mentioned in other posts, I'm sitting on some 1/2 height 5.25" drives, I have a slight problem though. The 20 pin header on the drive has no identifying features, no way to tell where pin 1 is.
>
> Does anyone know a quick way to figure that out?
>
> Last post for the day, I need to unfold and unspindle my back now.. and have a few happy pills. (wave)
>
> A
The 20-Pin connector is polarized on one side in the middle. If you lookup diagrams of it, they should show you where pin-1 is.
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| Re: Disk II cable interface pins [message #375056 is a reply to message #375040] |
Sat, 27 October 2018 17:39 |
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Originally posted by: Anthony Adverse
On Sunday, October 28, 2018 at 12:40:44 AM UTC+11, Patrick Schaefer wrote:
> Am 27.10.2018 10:15 schrieb Anthony Adverse:
>
>> Does anyone know a quick way to figure that out?
>
> Pin 1, 3, 5, 7 are connected together and Gnd. Pin 13, 15, 17, 17 are
> +12 V.
>
> So the row with the connected pins is odd, and this is where the pin 1
> mark goes.
>
>
> Patrick
You the man, got all my answers today. Time to get out the multimeter and the sharpie marker. :)
Thanks
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| Re: Disk II cable interface pins [message #375076 is a reply to message #375043] |
Sun, 28 October 2018 16:52 |
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Originally posted by: James Davis
On Saturday, October 27, 2018 at 9:57:48 AM UTC-7, James Davis wrote:
> On Saturday, October 27, 2018 at 1:15:03 AM UTC-7, Anthony Adverse wrote:
>> I have mentioned in other posts, I'm sitting on some 1/2 height 5.25" drives, I have a slight problem though. The 20 pin header on the drive has no identifying features, no way to tell where pin 1 is.
>>
>> Does anyone know a quick way to figure that out?
>>
>> Last post for the day, I need to unfold and unspindle my back now.. and have a few happy pills. (wave)
>>
>> A
>
> The 20-Pin connector is polarized on one side in the middle. If you lookup diagrams of it, they should show you where pin-1 is.
There is a Disk II Cable Pinout chart in the article here:
https://en.wikipedia.org/wiki/Disk_II
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