How to double the amount of floppy drives? DualSlim comes to help!

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By itozzz

Resident (49)

itozzz's picture

05-09-2022, 09:12

is this possible in an fs-a1f (cable is only 26 pin)

By Wierzbowsky

Guardian (3528)

Wierzbowsky's picture

05-09-2022, 09:40

itozzz wrote:

is this possible in an fs-a1f (cable is only 26 pin)

Technically, you can connect both adapters together, but it's unlikely that there is enough space to put them there. At least, I never tried to fit both of them or a "sandwich" inside A1F.

By Wierzbowsky

Guardian (3528)

Wierzbowsky's picture

03-10-2022, 19:17

Got the factory-made boards with correct connectors location and successfully tested them. If someone needs those boards or kits, please contact me.

By itozzz

Resident (49)

itozzz's picture

14-10-2022, 09:13

I have followed all the steps and it works correctly even the screen. Unfortunately it doesn't work on my FS-A1F since I can't get both units to work at the same time, I think there is a guide to do it with a switch. In case someone is interested in putting a screen, I leave an image with the connections:

By sdsnatcher73

Prophet (3675)

sdsnatcher73's picture

14-10-2022, 12:22

Have you set drive select jumpers correctly? I don’t see why it would not work on FS-A1F. Or is it missing some of the drive select signals on the cable/connector?

By itozzz

Resident (49)

itozzz's picture

14-10-2022, 14:41

I think the signal is missing as you comment, this would be the scheme according to flashjacks:

By sdsnatcher73

Prophet (3675)

sdsnatcher73's picture

14-10-2022, 17:00

Okay, you should be able to get DS1 from the FDD controller and lead it to your B: drive in a separate wire to the DualSlim board.

Here is the datasheet of TC8566AF (not entirely same suffix, FS-A1F has TC8566F). DS0 is on pin 69 and DS1 on 68. You can verify continuity between pin 69 on the chip and pin 6 on the FDD connector to confirm, then take pin 68 to the DualSlim board input pin 12 (Please verify if I did not make any mistake;))

By Wierzbowsky

Guardian (3528)

Wierzbowsky's picture

14-10-2022, 21:46

I think I know the answer and you won't like it. If I remember correctly, the floppy cable of A1F doesn't have the DS1 signal at all. I found it out when making an adapter, but completely forgot about it.

By itozzz

Resident (49)

itozzz's picture

15-10-2022, 20:59

Well, connecting a cable from pin 68 to pin 12 of the adapter I have according to megareport:
2 logic drives
2 hardware drivers.
If I disconnect the cable from pin 12 it gives me 2 logical drivers and 1 hardware drivers.
so far it seems correct, but I do not have access to drive B (usb). I don't know if it will be some configuration or jumpers
If I disconnect the jumper s1 from the gotek I also get 1 hardware drivers

By sdsnatcher73

Prophet (3675)

sdsnatcher73's picture

16-10-2022, 06:53

Well we’re on the right path. What does your Gotek do if it’s configured as drive 0 and only one connected on the bus? Does it work and can you boot a game from disk image?

What drive number is the floppy drive configured as? Personally I would prefer Gotek to be A: and FDD to be B:.

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