Modifying PC floppy drives for Amiga use - Page 22

kulamario · 28 July 2019, 11:46

Welcome
I have NEC FD1231M but dnt know how to do modification for Amiga
i have different PCB like on German page
https://drive.google.com/file/d/11hr...ew?usp=sharing
Anybody can help me please

katarakt · 28 July 2019, 20:17

NEC FD1231M looks similar to FD1231H. FD1231H are more than 2 PCB layouts available. This drive on your picture can only hacked with fake-ready (diode) between pin 30 and 34. Cut 2 traces and solder 2 wires on the controller ic. If you want to do this, i can go into detail. But i recommend choosing an other drive with real ready and no motor power-save function.

kulamario · 28 July 2019, 22:10

Can u show on picture what to do and how install diode please

kulamario · 30 July 2019, 23:59

Anybody can help me with this drive? please

katarakt · 17 September 2019, 21:58

Sorry forgot to reply, i will send pictures at the weekend...reply here if i forget again.I'm very busy.

katarakt · 22 September 2019, 17:56

Here is the how-to for NEC FD1231H as internal drive with diode fake-ready hack:

Cut the traces from Pin 34 + 12, add diode and wires as you can see in detail on the pictures attached.

Portello · 07 November 2019, 13:08

Quote:

Originally Posted by paulo_becas

I've just noticed a big problem with the Samsung drives.
They aren't able to write a floppy.
I've tried with all the samsung drives i could find and they all have the same problem.
I can format disks without a problem but when i tried to copy some floppys they become unreadable.
Does anyone experienced the same problem???
I've tried to copy with X-copy and with Amiga Explorer through my PC and the result is the same.
The floppy's are ok, i've formatted them after trying to write them with this drives and made a copy with my PC catweasel MK4 and they work fine, so the problem is with this floppy drives.

If anyone experienced this problem and fix it please tell me how.

hello, I found your same problem, did you find a solution? can you help me please?

katarakt · 07 November 2019, 22:18

The problem might be that these drives have a so called "power save" mode. Simple test: format a disk in workbench. Open shell and read the directory from the formated drive. Result is the disk is, at most, not readable. Maybe the Problem is the same with xcopy...i haven't tried this.

Wrangler · 21 February 2020, 18:58

I found what looked like a regular Sony MPF920-C in some stuff I bought recently, but on opening it up, I found it has been heavily modded. Putting into my A4000T shows that this PC drive can read and write HD floppies at half-speed. Might be interesting for anyone wanting to mod a similar drive themselves.

Marty_McFly · 22 February 2020, 23:29

Hi,
Just today I posted a request for opinions about Samsung drives modified for Amiga use.
This the link to my post in other section, sorry for my mistake in opening a new topic.

https://eab.abime.net/showthread.php...91#post1380791

Any experiences?

Exfso · 13 May 2020, 17:52

Have a Panasonic JU-257A896P, what a cow of a thing to pull down, but no idea where to start the mod as I have no information.
Any chance someone has an image and instructions, otherwise I will just give the drive the old heave ho!!

katarakt · 23 May 2020, 16:40

Without any detailed pictures from the Panasonic JU-257A896P pcb nobody can help.

Exfso · 29 May 2020, 17:41

Thanks mate, had other stuff happening, will get it out tomorrow and see if I can get a shot of the board.

Vasquez · 01 June 2020, 01:25

Hello everybody,

I have a Alps DF354H090F floppy drive.
Can anybody to tell me how to modify this drive to work on Amiga 500

supaduper · 01 June 2020, 06:33

Quote:

Originally Posted by Vasquez

Hello everybody,

I have a Alps DF354H090F floppy drive.
Can anybody to tell me how to modify this drive to work on Amiga 500

HOW to

Vasquez · 01 June 2020, 11:43

Quote:

Originally Posted by supaduper

HOW to

Thanks supaduper,

Can you tell me how to make it to work as DF1?

dJOS · 01 June 2020, 11:53

PC drives are DF1 by default - the twist in the floppy cable is what changes them to drive A or leaves them as drive B.

Jope · 01 June 2020, 11:56

Quote:

Originally Posted by Vasquez

Thanks supaduper,

Can you tell me how to make it to work as DF1?

Do you have an A2000, 3000 or 4000?

If yes, you just leave the drive as DS1 instead of modifying it to DS0. Remember to close the DF1 present jumper on the motherboard.

If you have an A500/600/1000/1200 instead, you will need to have the motor/ready logic board from an external drive to make it an external drive.

Vasquez · 02 June 2020, 12:03

Quote:

Originally Posted by Jope

Do you have an A2000, 3000 or 4000?

If yes, you just leave the drive as DS1 instead of modifying it to DS0. Remember to close the DF1 present jumper on the motherboard.

If you have an A500/600/1000/1200 instead, you will need to have the motor/ready logic board from an external drive to make it an external drive.

I have Amiga 500, but I wanted to make one more PC floppy to work as DF1.
So I will have to find some logic board for that, thanks for advice

katarakt · 03 June 2020, 16:50

If you can solder the logic board yourself you can use the AmiExtFDD

22 September 2019, 17:56	#426
katarakt Registered User Join Date: Jul 2017 Location: Germany Posts: 205	Here is the how-to for NEC FD1231H as internal drive with diode fake-ready hack: Cut the traces from Pin 34 + 12, add diode and wires as you can see in detail on the pictures attached. Attached Thumbnails

21 February 2020, 18:58	#429
Wrangler Registered User Join Date: Sep 2015 Location: London, UK Posts: 414	PC HD floppy I found what looked like a regular Sony MPF920-C in some stuff I bought recently, but on opening it up, I found it has been heavily modded. Putting into my A4000T shows that this PC drive can read and write HD floppies at half-speed. Might be interesting for anyone wanting to mod a similar drive themselves. Attached Thumbnails

13 May 2020, 17:52	#431
Exfso Registered User Join Date: Apr 2020 Location: Adelaide Australia Posts: 4	Panasonic mod Have a Panasonic JU-257A896P, what a cow of a thing to pull down, but no idea where to start the mod as I have no information. Any chance someone has an image and instructions, otherwise I will just give the drive the old heave ho!!

01 June 2020, 01:25	#434
Vasquez Registered User Join Date: Jun 2020 Location: Belgrade Posts: 4	Modifying PC floppy drive Alps DF354H090F for Amiga Hello everybody, I have a Alps DF354H090F floppy drive. Can anybody to tell me how to modify this drive to work on Amiga 500 Attached Thumbnails

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28 July 2019, 11:46	#421
kulamario Registered User Join Date: Dec 2018 Location: Greystones Posts: 60	Welcome I have NEC FD1231M but dnt know how to do modification for Amiga i have different PCB like on German page https://drive.google.com/file/d/11hr...ew?usp=sharing Anybody can help me please

28 July 2019, 20:17	#422
katarakt Registered User Join Date: Jul 2017 Location: Germany Posts: 205	NEC FD1231M looks similar to FD1231H. FD1231H are more than 2 PCB layouts available. This drive on your picture can only hacked with fake-ready (diode) between pin 30 and 34. Cut 2 traces and solder 2 wires on the controller ic. If you want to do this, i can go into detail. But i recommend choosing an other drive with real ready and no motor power-save function.

28 July 2019, 22:10	#423
kulamario Registered User Join Date: Dec 2018 Location: Greystones Posts: 60	Can u show on picture what to do and how install diode please

30 July 2019, 23:59	#424
kulamario Registered User Join Date: Dec 2018 Location: Greystones Posts: 60	Anybody can help me with this drive? please

17 September 2019, 21:58	#425
katarakt Registered User Join Date: Jul 2017 Location: Germany Posts: 205	Sorry forgot to reply, i will send pictures at the weekend...reply here if i forget again.I'm very busy.

07 November 2019, 22:18	#428
katarakt Registered User Join Date: Jul 2017 Location: Germany Posts: 205	The problem might be that these drives have a so called "power save" mode. Simple test: format a disk in workbench. Open shell and read the directory from the formated drive. Result is the disk is, at most, not readable. Maybe the Problem is the same with xcopy...i haven't tried this.

22 February 2020, 23:29	#430
Marty_McFly Registered User Join Date: Apr 2017 Location: Italy Posts: 60	Hi, Just today I posted a request for opinions about Samsung drives modified for Amiga use. This the link to my post in other section, sorry for my mistake in opening a new topic. https://eab.abime.net/showthread.php...91#post1380791 Any experiences?

23 May 2020, 16:40	#432
katarakt Registered User Join Date: Jul 2017 Location: Germany Posts: 205	Without any detailed pictures from the Panasonic JU-257A896P pcb nobody can help.

29 May 2020, 17:41	#433
Exfso Registered User Join Date: Apr 2020 Location: Adelaide Australia Posts: 4	Thanks mate, had other stuff happening, will get it out tomorrow and see if I can get a shot of the board.

01 June 2020, 11:53	#437
dJOS Registered User Join Date: Aug 2012 Location: Melbourne, Australia Posts: 888	PC drives are DF1 by default - the twist in the floppy cable is what changes them to drive A or leaves them as drive B.

03 June 2020, 16:50	#440
katarakt Registered User Join Date: Jul 2017 Location: Germany Posts: 205	If you can solder the logic board yourself you can use the AmiExtFDD

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