Extremely odd floppy drive problems....

Smiley · 25 April 2006, 21:40

Ok odd problem.

When I attach 2 floppys to my A2000 it doesnt read from them it just clicks as it would normally, awaiting a disk. When I attach 1, it can read and write from it but gives a normal DF0: and a DF1?????? in WB even though only 1 floppy is attached.

> I have switched the floppy cables
> Changed which way round the floppy cables go

> And even switched the CIA chips

> oh and I also put a new floppy drive in and the same problem happens

Any ideas?

Overdoc · 26 April 2006, 00:43

The drives themselves have a small ID switch or jumper.
Put the one for DF0: to 0, the one for the DF1 drive to 1.
Also, the floppy cable has to be one which has some wires crossed between DF0 and DF1 !

Smiley · 26 April 2006, 09:44

Ok, I think I need to set some jumpers then, yes I have the cross-over cable.

Thanks

Smiley · 26 April 2006, 14:01

Erm the original chinon drive has some pins with a jumper on....but I dont know what means what.

There are six pins in 2 rows of 3.

DamienD · 26 April 2006, 14:34

Usually there is a diagram somewhere on the device. See attached image (although it's a PC HDD)...

You would hope so anyway

DamienD · 26 April 2006, 14:42

Here's another picture. This one's a laptop HDD and has six pins in 2 rows of 3...

Do not take this as what the settings would be for your FDD but at least it gives you an idea of what to look for etc...

Smiley · 26 April 2006, 17:08

No diagram on the drive

Its a chinon FB-354 if anyone knows.

I might just put the jumper in random positions and see..

DamienD · 26 April 2006, 17:41

Hmmm, well if you are unable to find any documentation on the web then I guess you can try the same settings that are on that laptop HDD.

I'm pretty positive that setting the wrong jumpers will not damage the drive, it just won't work... Anyone?

Edit: check out this thread, it may help http://eab.abime.net/showthread.php?t=18393

and this: http://www.amiga.org/modules/newbb/v...ime=1118772621

Smiley · 26 April 2006, 18:40

Ok thanks....should the chinon drive be the one with the twist in the cable?

DamienD · 26 April 2006, 19:16

Sorry no idea. I don't even have an Amiga anymore unfortunately

Just managed to found some info for you

I did read through both links. There was some mention about twists in http://www.amiga.org/modules/newbb/v...ime=1118772621

...simply try sticking your Chinon drive on the 'untwisted' floppy connector where the bad df0: used to be and see if it works. If you have two twists in the cable, it will work without changing any jumpers. If you only have one twist, your Chinon is most likely jumpered as DS1 (=DF1 and will need to be rejumpered as DS0...

Somebody else who's an Amiga expert will need to help you with this...

Jope · 26 April 2006, 20:36

Also check out what wires are twisted.. Is it the LED signals (4-6) or the DS signals (12-14)?

If the DS signals are twisted, both drives must be DS0, otherwise have the straight one as 0 and the twisted one as 1.

Smiley · 26 April 2006, 20:48

ok the LED signals are twisted so I will give it another go...however my chinon drive has jumpers but my other one doesnt :S

Overdoc · 27 April 2006, 01:34

Well, I assume the one which doesn't have any jumpers works as a single drive with straight cable on an Amiga ? Then it is a DS0 drive.
The FB-354 on the other hand has 6 jumper pins: 3 in the upper row, and 3 in the lower row.
Now, if it is jumpered to DS0, then the lower-middle and lower -left should be jumpered. If you want to set it as DS1 you have to jumper the lower-middle and lower-right instead.

When you have done this set them on the cable like Jope told and it should work.

Another question:
Have you set jumper A-301 on the A-2000's mainboard ? It has to be set if you want to use 2 drives !

Smiley · 27 April 2006, 12:40

Yes overdoc I have set it but isnt it called J-301?

Ok then I need to switch the floppys round as the non-jumpered drive has a twist in the cable!

I will get this sorted today I hope

Smiley · 27 April 2006, 18:15

OK ALL FIXED!

I switched the floppys around and put the jumpered on the twisted cable and the nonjumpered on the straight then set the jumpered to DS1 (DS0 doesnt work)

And it all works! Thanks to all who contributed to this thead!

DamienD · 27 April 2006, 18:23

Excellent news, congratulations

25 April 2006, 21:40	#1
Smiley Amiga-less! Join Date: Feb 2005 Location: UK Posts: 1,350	Extremely odd floppy drive problems.... Ok odd problem. When I attach 2 floppys to my A2000 it doesnt read from them it just clicks as it would normally, awaiting a disk. When I attach 1, it can read and write from it but gives a normal DF0: and a DF1?????? in WB even though only 1 floppy is attached. > I have switched the floppy cables > Changed which way round the floppy cables go > And even switched the CIA chips > oh and I also put a new floppy drive in and the same problem happens Any ideas?

26 April 2006, 14:34	#5
DamienD Banned Join Date: Aug 2005 Location: London / Sydney Age: 47 Posts: 20,420	Usually there is a diagram somewhere on the device. See attached image (although it's a PC HDD)... You would hope so anyway Last edited by DamienD; 06 January 2018 at 13:55.

26 April 2006, 14:42	#6
DamienD Banned Join Date: Aug 2005 Location: London / Sydney Age: 47 Posts: 20,420	Here's another picture. This one's a laptop HDD and has six pins in 2 rows of 3... Do not take this as what the settings would be for your FDD but at least it gives you an idea of what to look for etc... Last edited by DamienD; 06 January 2018 at 13:55.

26 April 2006, 18:40	#9
Smiley Amiga-less! Join Date: Feb 2005 Location: UK Posts: 1,350	Ok thanks....should the chinon drive be the one with the twist in the cable? Last edited by Smiley; 26 April 2006 at 19:15.

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26 April 2006, 00:43	#2
Overdoc Commodore Collector Join Date: Aug 2001 Location: Austria Age: 53 Posts: 944	The drives themselves have a small ID switch or jumper. Put the one for DF0: to 0, the one for the DF1 drive to 1. Also, the floppy cable has to be one which has some wires crossed between DF0 and DF1 !

26 April 2006, 09:44	#3
Smiley Amiga-less! Join Date: Feb 2005 Location: UK Posts: 1,350	Ok, I think I need to set some jumpers then, yes I have the cross-over cable. Thanks

26 April 2006, 14:01	#4
Smiley Amiga-less! Join Date: Feb 2005 Location: UK Posts: 1,350	Erm the original chinon drive has some pins with a jumper on....but I dont know what means what. There are six pins in 2 rows of 3.

26 April 2006, 17:08	#7
Smiley Amiga-less! Join Date: Feb 2005 Location: UK Posts: 1,350	No diagram on the drive Its a chinon FB-354 if anyone knows. I might just put the jumper in random positions and see..

26 April 2006, 17:41	#8
DamienD Banned Join Date: Aug 2005 Location: London / Sydney Age: 47 Posts: 20,420	Hmmm, well if you are unable to find any documentation on the web then I guess you can try the same settings that are on that laptop HDD. I'm pretty positive that setting the wrong jumpers will not damage the drive, it just won't work... Anyone? Edit: check out this thread, it may help http://eab.abime.net/showthread.php?t=18393 and this: http://www.amiga.org/modules/newbb/v...ime=1118772621

26 April 2006, 19:16	#10
DamienD Banned Join Date: Aug 2005 Location: London / Sydney Age: 47 Posts: 20,420	Sorry no idea. I don't even have an Amiga anymore unfortunately Just managed to found some info for you I did read through both links. There was some mention about twists in http://www.amiga.org/modules/newbb/v...ime=1118772621 ...simply try sticking your Chinon drive on the 'untwisted' floppy connector where the bad df0: used to be and see if it works. If you have two twists in the cable, it will work without changing any jumpers. If you only have one twist, your Chinon is most likely jumpered as DS1 (=DF1 and will need to be rejumpered as DS0... Somebody else who's an Amiga expert will need to help you with this...

26 April 2006, 20:36	#11
Jope - Join Date: Jul 2003 Location: Helsinki / Finland Age: 43 Posts: 9,862	Also check out what wires are twisted.. Is it the LED signals (4-6) or the DS signals (12-14)? If the DS signals are twisted, both drives must be DS0, otherwise have the straight one as 0 and the twisted one as 1.

26 April 2006, 20:48	#12
Smiley Amiga-less! Join Date: Feb 2005 Location: UK Posts: 1,350	ok the LED signals are twisted so I will give it another go...however my chinon drive has jumpers but my other one doesnt :S

27 April 2006, 01:34	#13
Overdoc Commodore Collector Join Date: Aug 2001 Location: Austria Age: 53 Posts: 944	Well, I assume the one which doesn't have any jumpers works as a single drive with straight cable on an Amiga ? Then it is a DS0 drive. The FB-354 on the other hand has 6 jumper pins: 3 in the upper row, and 3 in the lower row. Now, if it is jumpered to DS0, then the lower-middle and lower -left should be jumpered. If you want to set it as DS1 you have to jumper the lower-middle and lower-right instead. When you have done this set them on the cable like Jope told and it should work. Another question: Have you set jumper A-301 on the A-2000's mainboard ? It has to be set if you want to use 2 drives !

27 April 2006, 12:40	#14
Smiley Amiga-less! Join Date: Feb 2005 Location: UK Posts: 1,350	Yes overdoc I have set it but isnt it called J-301? Ok then I need to switch the floppys round as the non-jumpered drive has a twist in the cable! I will get this sorted today I hope

27 April 2006, 18:15	#15
Smiley Amiga-less! Join Date: Feb 2005 Location: UK Posts: 1,350	OK ALL FIXED! I switched the floppys around and put the jumpered on the twisted cable and the nonjumpered on the straight then set the jumpered to DS1 (DS0 doesnt work) And it all works! Thanks to all who contributed to this thead!

27 April 2006, 18:23	#16
DamienD Banned Join Date: Aug 2005 Location: London / Sydney Age: 47 Posts: 20,420	Excellent news, congratulations

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