Modifying PC floppy drives for Amiga use - Page 8

Supamax · 30 January 2011, 14:50

Quote:

Originally Posted by AdyT

Indeed, there is no hall sensor on the drive measuring the rotation of the disk!

Is it perhaps under the "wheel"?

elpiloto · 16 February 2011, 20:58

hi guys, im Hernan AKA ELPILOTO as you can see :P
I saw lot of mods, really nice, im not going to say this hack is better than that or something like that, just that i did what i did because i had a particular need, but i think that its an intresting hack, because you dont have to find a particular drive, or use an old drive ( i dont like to put in risk my disks in a drive with a fulty head) you dont need electronic skills, is pretty easy.....its totally true that if you want to use a second drive (or more) youll have to use an other pc modified drive, an amiga drive will not work, but i preffer to use new drives, in fact, i dont use amiga drives any more since 11 years. Almost all Amigas fans here in Argentina use, at least, one of this modified pc drives, so dont worry, it works pretty well

if you want to see some pics and info about the hack, here is a link to my personal blog
http://elpilotohernan.wordpress.com/...tera-de-amiga/

cheers
elpiloto

d0pefish · 12 March 2011, 22:33

I've just successfully modded a Mitsumi / Newtronics D359T5.

This drive may have been done before but I made a diagram anyway in case it helps anyone:

Nice drive - quiet mechanism.

Here it is booting Arte!

dirkies · 16 March 2011, 16:19

got same Mitsumi / Newtronics D359T5, but PCB looks pretty different

any guidance for this one?

cpiac64 · 16 March 2011, 17:09

desold ds1 and resold on ds0, idem for dc to rdy

dirkies · 16 March 2011, 17:33

ok but what for the yellow cable, where to solder it from/to?

cpiac64 · 16 March 2011, 18:28

ok, pin 2 to dc near side of floppy, you insert a best photo, please.

dirkies · 16 March 2011, 18:41

what part do you need a better photo of, I think you mean this #6, #4, #2 vertical jumpers on mine missing on yours (just above jumper 29) , but same location.

cpiac64 · 16 March 2011, 18:46

look j1 if go to dc and if go to pin2, if yes close j1.

dirkies · 16 March 2011, 18:57

no clue where to look for, maybe this will help

cpiac64 · 16 March 2011, 19:15

please verify if trace red are ok

http://img851.imageshack.us/i/pin2.png/

dirkies · 16 March 2011, 19:32

yep, afaik they are connected with a thin line one the PCB, R29 with J1 and P2 (although the last one is rather hard to spot due to the white ink of J10 hiding the trace to P2)

cpiac64 · 16 March 2011, 21:34

follow the other side of j1, I suppose go to DC.
if ok, solder a wire instead of a r29 and instead of j1

rkauer · 17 March 2011, 03:50

Quote:

Originally Posted by dirkies

yep, afaik they are connected with a thin line one the PCB, R29 with J1 and P2 (although the last one is rather hard to spot due to the white ink of J10 hiding the trace to P2)

Look here for the diagram:

Eclipse · 29 March 2011, 06:40

Does anyone know why these work fine as a normal internal drive (and external for the most part) but mis-behave with hardware such as the super Ami or Cyclone dongle?

whitebird · 15 July 2011, 10:44

What I understand is that every PC drive can potentially be modified for amiga compatibility through the following remapping:

-Redirect /DCD to pin 2 so the Amiga can see it at the right place
-Configure drive to respond as DS0 (because every PC drive is configured as B or DS1)
-Find /RDY signal on the PCB and connect it to pin 34 which is now free because /DCD was disonnected from pin 34.

The main difficulty is to find the /RDY signal because it is not connected to the floppy connector, and every drive has a different PCB implementation.

orange · 15 July 2011, 14:54

well yes, this thread is about locating RDY on PC floppies..

whitebird · 15 July 2011, 16:15

1/ I remember it was written somewhere that some "recent" PC drives have open collector outputs. So 2K2 pullups had to be added on these signals (concerns only the signals generated by the drive like /INDEX for example) to have it work properly on the Amiga

Is it right?

2/ The /RDY can be generated from the /SEL, /MTR0 and /INDEX signals.

The condition to fullfill is:

Drive should be selected, motor on and 2 pulses occured on /INDEX. So if /RDY is not available on PCB, it should be artificially generated through external logic.

orange · 15 July 2011, 22:11

1) but how would they work in PC then?

2) have you checked out this thread: http://eab.abime.net/showthread.php?t=39042

it deals more with such information than this one.

11 December 2011, 18:17

hello guys! I have a samsung sfd-321b/le rev wt-04, is there any way to make it work work the amiga 500. Thank you very match!

Similar Threads
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

16 February 2011, 20:58	#142
elpiloto Registered User Join Date: Dec 2010 Location: Buenos Aires / Argentina Posts: 78	hi guys, im Hernan AKA ELPILOTO as you can see :P I saw lot of mods, really nice, im not going to say this hack is better than that or something like that, just that i did what i did because i had a particular need, but i think that its an intresting hack, because you dont have to find a particular drive, or use an old drive ( i dont like to put in risk my disks in a drive with a fulty head) you dont need electronic skills, is pretty easy.....its totally true that if you want to use a second drive (or more) youll have to use an other pc modified drive, an amiga drive will not work, but i preffer to use new drives, in fact, i dont use amiga drives any more since 11 years. Almost all Amigas fans here in Argentina use, at least, one of this modified pc drives, so dont worry, it works pretty well if you want to see some pics and info about the hack, here is a link to my personal blog http://elpilotohernan.wordpress.com/...tera-de-amiga/ cheers elpiloto

12 March 2011, 22:33	#143
d0pefish Registered User Join Date: May 2006 Location: Newcastle-upon-Tyne, England UK Age: 36 Posts: 103	I've just successfully modded a Mitsumi / Newtronics D359T5. This drive may have been done before but I made a diagram anyway in case it helps anyone: Nice drive - quiet mechanism. Here it is booting Arte!

16 March 2011, 16:19	#144
dirkies Zone Friend Join Date: Aug 2002 Location: Belgium Age: 51 Posts: 1,296	got same Mitsumi / Newtronics D359T5, but PCB looks pretty different any guidance for this one?

16 March 2011, 17:09	#145
cpiac64 Registered User Join Date: Apr 2010 Location: Italy Posts: 1,136	desold ds1 and resold on ds0, idem for dc to rdy

16 March 2011, 17:33	#146
dirkies Zone Friend Join Date: Aug 2002 Location: Belgium Age: 51 Posts: 1,296	ok but what for the yellow cable, where to solder it from/to?

16 March 2011, 18:28	#147
cpiac64 Registered User Join Date: Apr 2010 Location: Italy Posts: 1,136	ok, pin 2 to dc near side of floppy, you insert a best photo, please.

16 March 2011, 18:41	#148
dirkies Zone Friend Join Date: Aug 2002 Location: Belgium Age: 51 Posts: 1,296	what part do you need a better photo of, I think you mean this #6, #4, #2 vertical jumpers on mine missing on yours (just above jumper 29) , but same location.

16 March 2011, 18:46	#149
cpiac64 Registered User Join Date: Apr 2010 Location: Italy Posts: 1,136	look j1 if go to dc and if go to pin2, if yes close j1.

16 March 2011, 18:57	#150
dirkies Zone Friend Join Date: Aug 2002 Location: Belgium Age: 51 Posts: 1,296	no clue where to look for, maybe this will help

16 March 2011, 19:15	#151
cpiac64 Registered User Join Date: Apr 2010 Location: Italy Posts: 1,136	please verify if trace red are ok http://img851.imageshack.us/i/pin2.png/

16 March 2011, 19:32	#152
dirkies Zone Friend Join Date: Aug 2002 Location: Belgium Age: 51 Posts: 1,296	yep, afaik they are connected with a thin line one the PCB, R29 with J1 and P2 (although the last one is rather hard to spot due to the white ink of J10 hiding the trace to P2)

16 March 2011, 21:34	#153
cpiac64 Registered User Join Date: Apr 2010 Location: Italy Posts: 1,136	follow the other side of j1, I suppose go to DC. if ok, solder a wire instead of a r29 and instead of j1

29 March 2011, 06:40	#155
Eclipse Turpentine Join Date: Oct 2007 Location: Kent, United Kingdom Posts: 744	Does anyone know why these work fine as a normal internal drive (and external for the most part) but mis-behave with hardware such as the super Ami or Cyclone dongle?

15 July 2011, 10:44	#156
whitebird Registered User Join Date: May 2006 Location: France Age: 48 Posts: 211	What I understand is that every PC drive can potentially be modified for amiga compatibility through the following remapping: -Redirect /DCD to pin 2 so the Amiga can see it at the right place -Configure drive to respond as DS0 (because every PC drive is configured as B or DS1) -Find /RDY signal on the PCB and connect it to pin 34 which is now free because /DCD was disonnected from pin 34. The main difficulty is to find the /RDY signal because it is not connected to the floppy connector, and every drive has a different PCB implementation.

15 July 2011, 14:54	#157
orange Registered User Join Date: Apr 2007 Location: Belgrade Posts: 567	well yes, this thread is about locating RDY on PC floppies..

15 July 2011, 16:15	#158
whitebird Registered User Join Date: May 2006 Location: France Age: 48 Posts: 211	1/ I remember it was written somewhere that some "recent" PC drives have open collector outputs. So 2K2 pullups had to be added on these signals (concerns only the signals generated by the drive like /INDEX for example) to have it work properly on the Amiga Is it right? 2/ The /RDY can be generated from the /SEL, /MTR0 and /INDEX signals. The condition to fullfill is: Drive should be selected, motor on and 2 pulses occured on /INDEX. So if /RDY is not available on PCB, it should be artificially generated through external logic.

15 July 2011, 22:11	#159
orange Registered User Join Date: Apr 2007 Location: Belgrade Posts: 567	1) but how would they work in PC then? 2) have you checked out this thread: http://eab.abime.net/showthread.php?t=39042 it deals more with such information than this one.

11 December 2011, 18:17	#160
AMIGA500FAN Posts: n/a	hello guys! I have a samsung sfd-321b/le rev wt-04, is there any way to make it work work the amiga 500. Thank you very match!

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)