Setting up dual drive from single drive and gotek (level of complexity?)

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rph
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Setting up dual drive from single drive and gotek (level of complexity?)

Post by rph » Sat Oct 12, 2019 10:48 am

Hi, I've got a gotek (retroclinic) working nicely on my bbc and have noticed the odd 5 1/4 floppy drive on ebay. I was wondering how easy/ tricky it is to make a dual drive. Is it just the case of buying the right cable to connect the two up, or am I being stupidly optimistic? I've done quick a bit of searching for any kind of instructions and guide. Any kind of electrical work is most likely out of my skill level but tech teachers at school and the technician might be able to help.
If it's super tricky I will just stop torturing myself and refrain from looking at lovely hardware on ebay!
Thanks guys
Ralph

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Re: Setting up dual drive from single drive and gotek (level of complexity?)

Post by cmorley » Sat Oct 12, 2019 10:55 am

It really is that simple.

You need a cable with the edge connector for the floppy and the pins one for the gotek. Set the jumpers for which is drive 0/1. Get some molex extensions/splitter from eBay to get power to both drives. Put it all in a case.

No electronics just some cables and adapters.

rph
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Re: Setting up dual drive from single drive and gotek (level of complexity?)

Post by rph » Sat Oct 12, 2019 5:34 pm

Wow, thanks. Currently the gotek is powered from the beeb would both be able to be powered from the beeb. As if not I would know to look out for a mains powered floppy drive.
Cheers Ralph

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Re: Setting up dual drive from single drive and gotek (level of complexity?)

Post by rph » Sat Oct 12, 2019 5:37 pm

Also as the current gotek works with the DFS I have on there I'm assuming a dual drive would too.

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MartinB
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Re: Setting up dual drive from single drive and gotek (level of complexity?)

Post by MartinB » Sat Oct 12, 2019 6:33 pm

Yes the Beeb will power twin drives and yes, DFS will support two physical drives (as four logical drives). On the power supply, if you could find a drive with a built-in PSU and you can cope with the slightly larger case and one more mains plug, you will be reducing the strain on your Beeb PSU but no need to worry if you prefer a Beeb-powered drive.

(The caveat on powering two different drives from the Beeb is that you’ll need a power cable that splits the single Beeb outlet to two drive power connectors.)
Last edited by MartinB on Sat Oct 12, 2019 6:40 pm, edited 1 time in total.

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danielj
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Re: Setting up dual drive from single drive and gotek (level of complexity?)

Post by danielj » Sat Oct 12, 2019 6:39 pm

A gotek uses next to no power compared to a 5.25" drive. Actually uses next to no power compared to most things!

d.

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Re: Setting up dual drive from single drive and gotek (level of complexity?)

Post by johnkenyon » Sat Oct 12, 2019 7:24 pm

If I was going for a 5.25"+Gotek solution my shopping list would be:

1x Dual floppy case with one working FDD
1x3.5" floppy mounting bracket kit
1xGotek
Either 1xcard edge to IDC adaptor, or a ribbon cable with the right connectors and without a twist.
1xBBC floppy power lead
1xMolex disc drive power splitter

Then I would strip the non-working FDD and PSU from the dual floppy case.
Replace removed drive with with Gotek+drive adaptor bracket
Connect drives as required (probably with the Gotek as drive 0, and the FDD as drive 1).
Connect power (and double check, especially on the Gotek)
Test it.

rph
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Re: Setting up dual drive from single drive and gotek (level of complexity?)

Post by rph » Mon Nov 11, 2019 6:34 pm

Hi, looks like I've finally sourced a 5 1/4 floppy drive after much messing around, should be with me later in week.
I'm bit confused by the ribbon cable needed to connect them, there's lots on the threads saying without twist but also with twist.
Is this what I'd need:
https://rover.ebay.com/rover/0/0/0?mpre ... 2458525354

Lots of the cables I've seen on eBay say not suitable for 5 3/4 drives (I'm assuming this is a typo).

Help appreciated, getting pretty excited now and keen to get putting together

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1024MAK
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Re: Setting up dual drive from single drive and gotek (level of complexity?)

Post by 1024MAK » Mon Nov 11, 2019 10:06 pm

IBM PC and compatibles need a twist in the cable, as the wiring for the disk drive interface is slightly different to the Shugart Associates interface used by the Beeb (and other computers before IBM moved the goalposts).

So that means you want a cable without any twist.

It is possible to make up a cable yourself, as the ribbon cable and all the connectors are still available from electronic suppliers. All that is needed is some scissors (cheap ones will do, best not use best, or nice ones) and something to compress the connections onto the cable (like a vice).

Alternatively, either ask a kind member on here if they could make a cable for you, or ask one of the professional repairs to make a cable for you.

It is also possible to take apart the connectors on a twisted cable so that you can untwist it, but this can be a bit fiddly.

Mark

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Re: Setting up dual drive from single drive and gotek (level of complexity?)

Post by vanpeebles » Tue Nov 12, 2019 9:03 am

https://www.ebay.co.uk/itm/Card-Edge-to ... SwKrRdbCnl

I've ordered one of those to hopefully let me use a CPC 3" drive on a Tatung. Might be of some use?

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Re: Setting up dual drive from single drive and gotek (level of complexity?)

Post by rph » Tue Nov 12, 2019 9:32 pm

Cheers, once I finally get my drive think I'll get one made up. Thanks

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Re: Setting up dual drive from single drive and gotek (level of complexity?)

Post by danielj » Tue Nov 12, 2019 9:35 pm

vanpeebles wrote:
Tue Nov 12, 2019 9:03 am
https://www.ebay.co.uk/itm/Card-Edge-to ... SwKrRdbCnl

I've ordered one of those to hopefully let me use a CPC 3" drive on a Tatung. Might be of some use?
Careful, the CPC external drive pushes power out down some of the wires, and the connector is upside-down! It's somewhat non-standard! If it's just the bare drive it has a 26pin connector.

d.

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vanpeebles
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Re: Setting up dual drive from single drive and gotek (level of complexity?)

Post by vanpeebles » Tue Nov 12, 2019 11:03 pm

danielj wrote:
Tue Nov 12, 2019 9:35 pm
vanpeebles wrote:
Tue Nov 12, 2019 9:03 am
https://www.ebay.co.uk/itm/Card-Edge-to ... SwKrRdbCnl

I've ordered one of those to hopefully let me use a CPC 3" drive on a Tatung. Might be of some use?
Careful, the CPC external drive pushes power out down some of the wires, and the connector is upside-down! It's somewhat non-standard! If it's just the bare drive it has a 26pin connector.

d.

Spare internal drives :)

rph
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Re: Setting up dual drive from single drive and gotek (level of complexity?)

Post by rph » Tue Dec 10, 2019 4:41 pm

Have got myself and early xmas present and now have a drive. Bought some molex cables and both the gotek and the drive are powered from the beeb.

Just getting a dual cable made up and should be ready to go.

Question: I'm right in says the jumper in the pic of the gotek just moves along 1 place to the right to enable it to be drive 1?
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danielj
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Re: Setting up dual drive from single drive and gotek (level of complexity?)

Post by danielj » Tue Dec 10, 2019 4:50 pm

Is that gotek pre-flashed with flashfloppy? (I ask as it doesn't have any of the other header pins fitted) - if not you're going to have to do that first. Then, what you set the jumper to depends on the type of cable you have (twist/no twist). Assuming it's a no-twist cable and the other drive is set to 0, then yes, this one should be set to 1.

d.

rph
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Re: Setting up dual drive from single drive and gotek (level of complexity?)

Post by rph » Thu Dec 12, 2019 4:01 pm

Hi, the gotek is all running nicely. Have had to do a bit of work then should see if it runs....

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Re: Setting up dual drive from single drive and gotek (level of complexity?)

Post by rph » Fri Dec 20, 2019 10:21 am

Finally got all the bits needed and got to work last night. Can't believe it actually all worked no worries. Well chuffed!
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Re: Setting up dual drive from single drive and gotek (level of complexity?)

Post by rph » Wed Dec 25, 2019 2:21 pm

Anyone know how to shift break to run !BOOT when in drive 1?
I *DRIVE 1, then want to run the !BOOT from the gotek which is drive 1, but no luck. I've gone through both floppy books that I have and a rummage online but no luck.
Any help appreciated.
Thanks
Ralph
Happy xmas :(

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