![]() |
![]() |
#81 |
Registered User
Join Date: Oct 2008
Location: Finland
Posts: 643
|
Hi! Is it possible to use a modified PC floppy drive and use it in a external floppy drive case? I have a broken external drive, when I try to connect my modified Panasonic to the external drive case it doesn't work, the led is constantly lit. Will it work if I move the ds1/ds0 jumper back to ds1? Is there something else I'm missing? The modified drive work well as an internal drive.
|
![]() |
![]() |
#82 |
Amiga Nut
Join Date: Oct 2006
Location: Belco, Australia
Posts: 2,242
|
Hmm, I've got an external one that works great with a modified PC drive set to DS0...are you sure it's not something else inside the unit that is broken?
Maybe try the drive you took out of it & connect as internal as a test? PZ. |
![]() |
![]() |
#83 |
Registered User
Join Date: Oct 2008
Location: Finland
Posts: 643
|
I know the unit is otherwise working, the problem is with the mechanics of the drive itself, AND I also had this same problem when the external drive was working, I tried already then (for fun) to connect a modified panasonic but it did not work. Could it be that some external drive cases need the drive set to ds1 and some to ds0?
|
![]() |
![]() |
#84 |
Amiga Nut
Join Date: Oct 2006
Location: Belco, Australia
Posts: 2,242
|
Maybe, it would make sense that not all manufacturers would do it exactly the same way.
PZ. |
![]() |
![]() |
#85 |
Registered User
Join Date: Oct 2008
Location: Finland
Posts: 643
|
Well this was just too stupid!
![]() |
![]() |
![]() |
#86 |
Amiga Nut
Join Date: Oct 2006
Location: Belco, Australia
Posts: 2,242
|
|
![]() |
![]() |
#87 |
The 1 who ribbits
|
yep sure sign floppy lead is connected upside down the led is constantly lit
|
![]() |
![]() |
#88 |
Moderator
Join Date: Nov 2004
Location: Eksjö / Sweden
Posts: 5,647
|
Not modding a PC drive, but removed an A600 internal drive completely and looking for advice on how to patch it to get rid of the 4-second wait. (See separate thread here)
|
![]() |
![]() |
#89 | ||
Posts: n/a
|
![]() Quote:
Quote:
It's not working with more than 1 drive (because you shunt /RDY signal made by "normal amiga" drive). It's dangerous for floppy chips life ! There's no way to have reliable drive without /ready signal without electronics modifications. |
||
![]() |
#90 |
Amiga hobbyist
Join Date: Aug 2008
Location: Oulu, Finland
Posts: 250
|
I wonder, if this site would need some updating?
http://freewebs.com/computolio/amiga...atibility.html |
![]() |
![]() |
#91 |
I hate potatos and shirts
|
I made Ernan's hack about 3 years ago on 5 floppy units. They all still going stronger.
|
![]() |
![]() |
#92 |
Registered User
Join Date: Feb 2010
Location: Porto, Portugal
Posts: 464
|
I´ve just modified two Panasonics and they work great, thank´s a lot.
I also modified a samsung floppy drive with the same result, the best thing about this drive is that i can still buy it from any local computer store ![]() ![]() |
![]() |
![]() |
#93 |
no c= no fun
Join Date: Jun 2008
Location: Birmingham
Posts: 317
|
Hi,
I am trying to modify a Panasonic JU-257A606P(F9536) , the board is different that the one of the 1st post. but as I see there are the RDY/DC pads and DS1 / DS0. I wanted to use this as external (the old external kicked the bucket) so I left the DS switch (pad) as it was, I removed the DC jumper on the PCB, and connected the DC with the pin 2 and RDY with the pin 34 of the interface. I still cannot use this drive, there is a DF1??? on the desktop so I suppose I need to modify something else too on the PCB, but I have no idea what.... As I see there is a MO/MS (motor on/off) PCB switch, as I see is off (MS).. should I put this to MO ? Regards Chris |
![]() |
![]() |
#94 |
Registered User
Join Date: Feb 2010
Location: Porto, Portugal
Posts: 464
|
Here´s a list of drives i´ve modified so far.
Samsung SFD-321B Rev T1; Rev T3 and Rev A Alps Electric DF354H090F Mitsumi Newtronics D359T6 NEC FD1231T Sony MPF920 Z/131 Panasonic JU-257A606P The Samsung drives are pretty easy to modify, the others aren´t hard but Alps Elctric and NEC need you to be very steady to solder them. I´ll post some images soon for your info. I tried to modify diferent drives just to see where i could go. Bottom line, if you find the right place to modify in each PCB their all pretty much the same. They are all as DF0 |
![]() |
![]() |
#95 |
I hate potatos and shirts
|
Where did you found DS0/DS1 on Mitsumi Newtronics D359T6? I'm
![]() Albeit it is a shame that a HD-ready floppy unit will go just 880kb. |
![]() |
![]() |
#96 |
Da Digger :)
Join Date: Nov 2008
Location: Monza, Italy
Posts: 2,822
|
|
![]() |
![]() |
#97 |
I hate potatos and shirts
|
Same wording, different meanings. Not "High Definition", but High Density.
![]() |
![]() |
![]() |
#98 |
Registered User
Join Date: Jan 2008
Location: United Kingdom
Age: 46
Posts: 733
|
@xc8
To make a disk drive work as Df1-DF3 requires additional circuitry on the A500/A600/A1200. You need to latch the MTRx signal together with the SEL1/SEL2 or SEL3 signal. All these signals are only available from the 23 way d-type connector. Basically you use a 74LS74 d-type flip flop, connect MTRX to the Data input and the SEL1/SEL2 or SEL3 input to the Clock input. The Q output the becomes the MotorON signal for the FDD. From MotorOn and SEL you can then create the inverted Ready signal to send back to the Amiga. The following diagram comes from the PCFloppy-2-Amiga archive from Aminet. ![]() If you do not use this circuit, you will get the DF1:???? icon on the desktop as the drive is not being correctly selected. Ian |
![]() |
![]() |
#99 |
no c= no fun
Join Date: Jun 2008
Location: Birmingham
Posts: 317
|
Thank you Ian,
I want to replace the drive of an external drive (from power computing) There is already an IC inside (GAL16v8) with some components. So I suppose these components have nothing to do with your diagram? thanx Chris |
![]() |
![]() |
#100 |
Registered User
Join Date: Jan 2008
Location: United Kingdom
Age: 46
Posts: 733
|
@xc8.
Undo the DS1/DS0 and DC/RDY changes you did earlier and plug the drive in unmodified. The 16V8 GAL and PCB most likely adapt the PC drive for the Amiga. When my Amitek external drive broke many years back, I plugged in a new FDD with absolutely no modifications and it worked, because the GAL and PCB took care of the differences between PC and Amiga drives. You will not need the circuit I showed earlier. Ian |
![]() |
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
Thread Tools | |
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
Amiga 5.25-inch floppy disks and drives | mips | support.Hardware | 25 | 28 October 2023 14:54 |
Copying Amiga disks using Floppy drives on a PC. | hamster | support.Hardware | 22 | 01 September 2020 10:46 |
List of Amiga compatible PC floppy drives | Olecranon | support.Hardware | 12 | 05 October 2011 17:38 |
Amiga floppy drives | cinemawareman | Amiga scene | 5 | 17 March 2011 15:40 |
replacing amiga floppy drives with hard drives | Gordon | support.Hardware | 2 | 06 March 2007 00:44 |
|
|