Atari External Gotek Floppy Cable??

zezba9000 · September 17, 2021

34 minutes ago, tocksin said:

This pinout is slightly different from TGB1718's table. The pin 5 is going to pin 12 instead (TGB1718 is going to pin 14). I've done TGB1718's version myself and I'm having some problems. Before I cut and splice and solder, can you verify which is the correct way? Is your external Gotek working with pin 5 on the circular connector going to pin 12 on the rectangular one?

I now have a working cable. I can map out all PINs for you later today after work or this weekend (this really needs to be on the web [I'll probably upload it on arcive.org too]).

Just hold off for a little and I'll try to get that info for you.

zezba9000 · September 19, 2021

On 9/17/2021 at 12:22 PM, tocksin said:

Before I cut and splice and solder, can you verify which is the correct way?

Ok I've mapped the cable. This cable works perfect for me.

External link: https://archive.org/details/atari-st-external-cable

Edited September 19, 2021 by zezba9000

tocksin · September 20, 2021

Ok, it looks like your cable IS different from TGB1718's version. The drive select pins are switched so that:

TGB1718:

5 Drive 0 select >>> 14

6 Drive 1 select >>> 12

zezba9000:

5 Drive 0 select >>> 12

6 Drive 1 select >>> 14

I also notice that in your previous photo, your pin 6 was not connected, and in this version it is. Was that the change that solved your problems?

My cable matches TGB1718's version. I will modify mine to match your version and report if this solves my problem.

Edited September 20, 2021 by tocksin

tocksin · September 20, 2021

My drive is now operational. However, I'm not 100% sure if swapping those lines is what made it work. After I swapped the wires, I was getting the same result as I previously was. I was able to open the drive contents, but the contents looked like garbage files and folders.

So I loaded the special logging firmware to debug further. It was loading the autoboot.hfe as its image. For some reason, I couldn't switch away from this drive image using the front panel buttons. So I renamed that file so it wouldn't be able to find it. Then it was not able to find any disk images. I switched to indexed mode in the FF.CFG to help it out. I renamed a couple files to match the naming scheme of DSKA0000 and it started finding the files. I then tried native mode, and it worked just fine. I guess it's because I'm not able to run the autoboot program for HxC compatibility mode to set up my drive slots. And I don't think I can run it as a normal program - it needs to be autoboot which I can't do from drive B. I guess it was just a matter of learning how the software work.

Oh and the jumper on the FDD-UDD U144K was not right - it needs to be on the J1 jumper and not the J2 jumper.

zezba9000 · September 20, 2021

5 hours ago, tocksin said:

Was that the change that solved your problems?

I bought that cable new (I didn't make it). That cable was probably based off an official one that are impossible to find.

29 minutes ago, tocksin said:

I was able to open the drive contents, but the contents looked like garbage files and folders.

Atari ST uses FAT12 I think while your files may be using FAT16 (which only works with ROM upgrades or newer versions)? Maybe I could send what test files I have on my USB that work with my 520ST.

29 minutes ago, tocksin said:

Oh and the jumper on the FDD-UDD U144K was not right - it needs to be on the J1 jumper and not the J2 jumper.

Maybe this thread helps

https://github.com/keirf/FlashFloppy/issues/232#issuecomment-711482366

Edited September 20, 2021 by zezba9000

Max64 · February 10

Hi there

I'm looking to do this amazing cable but I'm little bit confused for pinout because from here there are 3 different ribbon connection type :-)

I'm talking about info from user TGB1718 , zezba9000 and Ute

TGB1718:

1 read ->>>> >>>> 30

2 Side Select >>>>> 32

3 Ground>>>>>>>> any odd pin

4 Index >>>>>>>> 8

5 Drive 0 select >>> 14 (Drive select 0)

6 Drive 1 select >>> 12 (Drive select 1)

7 Ground >>>>>>> any odd pin

8 Motor on >>>>>> 16

9 Direction >>>>>> 18

10 Step >>>>>>>> 20

11 Write Data >>>> 22

12 Write Gate >>>> 24

13 Track 0 >>>>>> 26

14 Write Protect >>> 28

zezba9000:

1 read ->>>> >>>> 30

2 Side Select >>>>> 32

3 Ground>>>>>>>> any odd pin

4 Index >>>>>>>> 8

5 Drive 0 select >>> 12 (Drive select 1)

6 Drive 1 select >>> 14 (Drive select 0)

7 Ground >>>>>>> any odd pin

8 Motor on >>>>>> 16

9 Direction >>>>>> 18

10 Step >>>>>>>> 20

11 Write Data >>>> 22

12 Write Gate >>>> 24

13 Track 0 >>>>>> 26

14 Write Protect >>> 28

Ute: (ribbon1 / ribbon2)

Ribbon1.tiff

Ribbon2.tiff

Last but not least, he inserted an extract from a manual where the 34Way to DIN14 connection is shown... but this is also different from all the others given that PIN 8 of the DIN14 connector is put as connected to both the PIN10 and the PIN16 of the connector IDC34 (Motor Enable A + Motor Enable B).
While for those of TGB1718 and zezba9000 the PIN8 of the DIN14 connector is connected only to the PIN16 of the IDC34 connector (Motor Enable B).Check below diagram

Connector1.tiff

In his posts he included a couple of different cables, I think they are Ribbon1 and Ribbon2. However, both cables are wired differently from those of zazba9000 and TGB1718

Therefore I find myself in difficulty because I don't understand all these differences in wiring

Can anyone clarify? Thank you very much :-)

Max64 · February 10

Data corrige

(It doesn't allow me to edit the previous post I think because I'm a new user)

The two connection lists (TGB1718) and that of (zezba9000) are identical with the exception of the PIN5 connection of the DIN14 to the IDC34 connector

TGB1718:

5 (Drive 0 select) >>> 14 (Drive select 0)

zezba9000:

5 (Drive 0 select) >>> 10 (Motor enable Drive 0)

Ute · February 25

Hi,

I think it's the Ribbon1.tiff that shows what pin to connect the round cable to. In other words the numbers written in pencil, are the pin numbers for the round connector if I remember correctly.

Honestly though it's a lot of work. If you can afford it I would probably just buy one of these:

https://www.ebay.com/itm/334756348147?itmmeta=01HQBZZY0XF0EXPD1S2N1XS6W8&hash=item4df10880f3:g:WakAAOSwDIdj804R&itmprp=enc%3AAQAIAAAA8ONSNaLdFm6mH5b7STOBwN7Lkq%2F7OxZvQiccWSw1Vp24KgzBzPVS7AhgZ%2B8z97SQ4D0eCbMZZAUIaTpaO9dBhGS0AKYlB%2Ft403vUogT%2FKnHEO7niq0xrBjbF9hMuplGK70vVMHQgJT%2F%2BmrOMt8cSVwFOBa44z7IFWuBCrytBPxgxfxOzt0b7%2FPuoHmkpC%2Flq8txwllzPHTVCJLR3RuKn1FH0FP6XknIHciylD8M2kjTq0azlNUHHbam%2Bn4Hqza0PZGBpcyKLBGFhhlHn1hDNMx85QfbgTRS819v5%2FBK0srWup1eyKu3nUpYoMEf7OnZBTQ%3D%3D|tkp%3ABk9SR9Dg__-6Yw

https://www.ebay.com/itm/116070881042?itmmeta=01HQBZZY0TSZ26PXB2J1PPXVJ5&hash=item1b065d1712:g:oSQAAOSwInxfNphw&itmprp=enc%3AAQAIAAAA4E5HJcN7j%2Bw0CkgBt0EcSLpQPbnyCWBu6TpGi%2B4jMXWfxo4jqjD9sP%2B9WwnOSPSpQvQ6J4GgChQz7b7bLaoWLtBpLiMMUdC3T5AZswzaQB5U1CyC0P%2B2Z6KsIHyd7jlYWf9czBLccMafqiYLak42HssgqFBbTg0mdfKzcn9WgHh8sU2dAyXEInJO58Bhgd4cEn6xhTTunVesMWjE21H1sg86v3Zvvm3u6I0qmSclnjAsq7cdH7Txks93XGzR3XorJxS5HhMq%2BJzEGiEdNbPsBERwPvUicQD9gmsdxzBUERyg|tkp%3ABFBMxOD__7pj

https://www.ebay.com/itm/196119857154?itmmeta=01HQBZZY0TSYE30B2PZ2NFBRD6&hash=item2da9a78802:g:Hn8AAOSwqw5lcPmh&itmprp=enc%3AAQAIAAAA4IrCotcAtfGRkgUe%2BbQzx8lKkPImXjxJH%2BaBpRZ%2FB8KvZma1no3tNNW2vzxe%2Bi5Uyas5t%2BFQsS4vKtTXqmjlSxSUG4sqqsM%2F993RQ2Q5CGG3VQUfNyyDGOICGJeC%2FdhMRnUWfUaha%2FNxmubuW672JYH5mPurRw%2FrBgFCNWPUUHNRzfQPDIiukUa%2BdfbMuuQmFi4dx%2FoiksdhAwb0lvCRqnQ%2B2qmS1OQBBeJvMyE4Ni5KSwLCNdL3SaR%2FOeAlyw%2FN7PU3yhBvpmBvCsJs0gQr5l2JR16PuhYkFn3Z4O41CNQk|tkp%3ABFBMxOD__7pj

Good luck! 😉

Max64 · February 29

On 2/25/2024 at 1:18 AM, Ute said:

Hi,

I think it's the Ribbon1.tiff that shows what pin to connect the round cable to. In other words the numbers written in pencil, are the pin numbers for the round connector if I remember correctly.

Honestly though it's a lot of work. If you can afford it I would probably just buy one of these:

https://www.ebay.com/itm/334756348147?itmmeta=01HQBZZY0XF0EXPD1S2N1XS6W8&hash=item4df10880f3:g:WakAAOSwDIdj804R&itmprp=enc%3AAQAIAAAA8ONSNaLdFm6mH5b7STOBwN7Lkq%2F7OxZvQiccWSw1Vp24KgzBzPVS7AhgZ%2B8z97SQ4D0eCbMZZAUIaTpaO9dBhGS0AKYlB%2Ft403vUogT%2FKnHEO7niq0xrBjbF9hMuplGK70vVMHQgJT%2F%2BmrOMt8cSVwFOBa44z7IFWuBCrytBPxgxfxOzt0b7%2FPuoHmkpC%2Flq8txwllzPHTVCJLR3RuKn1FH0FP6XknIHciylD8M2kjTq0azlNUHHbam%2Bn4Hqza0PZGBpcyKLBGFhhlHn1hDNMx85QfbgTRS819v5%2FBK0srWup1eyKu3nUpYoMEf7OnZBTQ%3D%3D|tkp%3ABk9SR9Dg__-6Yw

https://www.ebay.com/itm/116070881042?itmmeta=01HQBZZY0TSZ26PXB2J1PPXVJ5&hash=item1b065d1712:g:oSQAAOSwInxfNphw&itmprp=enc%3AAQAIAAAA4E5HJcN7j%2Bw0CkgBt0EcSLpQPbnyCWBu6TpGi%2B4jMXWfxo4jqjD9sP%2B9WwnOSPSpQvQ6J4GgChQz7b7bLaoWLtBpLiMMUdC3T5AZswzaQB5U1CyC0P%2B2Z6KsIHyd7jlYWf9czBLccMafqiYLak42HssgqFBbTg0mdfKzcn9WgHh8sU2dAyXEInJO58Bhgd4cEn6xhTTunVesMWjE21H1sg86v3Zvvm3u6I0qmSclnjAsq7cdH7Txks93XGzR3XorJxS5HhMq%2BJzEGiEdNbPsBERwPvUicQD9gmsdxzBUERyg|tkp%3ABFBMxOD__7pj

https://www.ebay.com/itm/196119857154?itmmeta=01HQBZZY0TSYE30B2PZ2NFBRD6&hash=item2da9a78802:g:Hn8AAOSwqw5lcPmh&itmprp=enc%3AAQAIAAAA4IrCotcAtfGRkgUe%2BbQzx8lKkPImXjxJH%2BaBpRZ%2FB8KvZma1no3tNNW2vzxe%2Bi5Uyas5t%2BFQsS4vKtTXqmjlSxSUG4sqqsM%2F993RQ2Q5CGG3VQUfNyyDGOICGJeC%2FdhMRnUWfUaha%2FNxmubuW672JYH5mPurRw%2FrBgFCNWPUUHNRzfQPDIiukUa%2BdfbMuuQmFi4dx%2FoiksdhAwb0lvCRqnQ%2B2qmS1OQBBeJvMyE4Ni5KSwLCNdL3SaR%2FOeAlyw%2FN7PU3yhBvpmBvCsJs0gQr5l2JR16PuhYkFn3Z4O41CNQk|tkp%3ABFBMxOD__7pj

Good luck! 😉

Hi there..thanks for the message :-)

I thought you already had this cable and just needed to know how that pin was connected

TGB1718:

5 (Drive 0 select) >>> 14 (Drive select 0)

zezba9000:

5 (Drive 0 select) >>> 10 (Motor enable Drive 0)

Now without thinking too much about Zezba9000, he bought it from a seller and mapped it... so I think it's 99% the correct configuration (except for a mistake in pulling the wires that can be seen with the "Paint"

My doubt was simply linked to the fact that @TGB1718 also says he connected it identically but with PIN5 to PIN14 and it works...

This is why I was wondering: how do they both work?

Ute · March 1

On 2/29/2024 at 3:57 AM, Max64 said:

Hi there..thanks for the message 🙂

I thought you already had this cable and just needed to know how that pin was connected

TGB1718:

5 (Drive 0 select) >>> 14 (Drive select 0)

zezba9000:

5 (Drive 0 select) >>> 10 (Motor enable Drive 0)

Now without thinking too much about Zezba9000, he bought it from a seller and mapped it... so I think it's 99% the correct configuration (except for a mistake in pulling the wires that can be seen with the "Paint"

My doubt was simply linked to the fact that @TGB1718 also says he connected it identically but with PIN5 to PIN14 and it works...

This is why I was wondering: how do they both work?

Hi,

Sorry for the confusion. I did indeed build two cables, but I sold them with a 520 that I had. So I was going by memory since I no longer have them.

Did you get it working?

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Atari External Gotek Floppy Cable??

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