Amiga compatible floppy drives

The Epson SMD300 series is dead easy to convert: sack the two small jumpers on the back and solder the pins horizontally (when seeing the board from the connector side).
 
Panasonic JU-257A606P & JU-257A826P the Motor wires on these panasonics are individual wires, making it easy to desolder them in order to modify the PCB, but the best part..

I had 2 "on their deathbed" amiga JU-253-043P's from 1200's and the buttons from these amiga drives fit right onto the PC drives
 
There's another interesting document (although in German) over at http://www.pitsch.de/stuff/amiga/a1korg_01.pdf
Still, i'm having a bit of a problem trying to figure out if i can use one of the two floppies i got. One's a NEC FD1231H and the other is a TEAC FD-235HF A291-U5. Here's pics of the pcb's:

The NEC drive:

NECFD1231H.jpg


and the TEAC drive:

TEACFD235HFA291U5.jpg


Now, i've noticed elsewhere rkauer has done a hack with the NEC one, but mine does not have an JA1 smd resistor like his. Any ideas?
 
There's another interesting document (although in German) over at http://www.pitsch.de/stuff/amiga/a1korg_01.pdf
Still, i'm having a bit of a problem trying to figure out if i can use one of the two floppies i got. One's a NEC FD1231H and the other is a TEAC FD-235HF A291-U5. Here's pics of the pcb's:

The NEC drive:

NECFD1231H.jpg


and the TEAC drive:

TEACFD235HFA291U5.jpg


Now, i've noticed elsewhere rkauer has done a hack with the NEC one, but mine does not have an JA1 smd resistor like his. Any ideas?

Can't see your pics (my browser doesn't seem to want to load them), but doesnt' matter I've aleady done a few teac drives, most have a jumper block that you can set everthing w/o having to solder..

take a look at this PDF, maybe it can help you out
http://web.archive.org/web/20031211054018/http://www.teac.com/DSPD/pdf/3fd0020a.pdf
 
@Khyron:
Thanks for the link mate, but as it states:
FD-235-HF-A2XX

"Please be informed that the models mentioned above are fixed 1.44M drives. They are factory preconfigured and do not have a block of jumpers for configuration!"
 
@Khyron:
Thanks for the link mate, but as it states:
FD-235-HF-A2XX

"Please be informed that the models mentioned above are fixed 1.44M drives. They are factory preconfigured and do not have a block of jumpers for configuration!"

:) Now I see the pics

The NEC you have shows up in this one, but it look like they never found the signals.
http://www.pitsch.de/stuff/amiga/a1korg_02.pdf


and I think this one looks really close to your model..
http://eab.abime.net/showpost.php?p=681434&postcount=43
 
@Salaxi54: my friend, the TEAC drive have the DS0/1 SMD resistor you can move.

Remember the hack of swapping lines 2x34 and join the "new 34" with 30 will make the Amiga not recognizing any other floppy unit on the Amiga.
 
@Salaxi54: my friend, the TEAC drive have the DS0/1 SMD resistor you can move.

Which in my picture is...? EDIT: ok, i got it! you said the Teac drive! I was thinking you already had a hack of a NEC. :) Does this mean that this Teac could be Ami-compatible?

Remember the hack of swapping lines 2x34 and join the "new 34" with 30 will make the Amiga not recognizing any other floppy unit on the Amiga.
The 2<-->34 swap is understood! Are you saying the swapped pin 34 (2) now is to be connected to 30 also?
There's one detail here: I have no intention of using a second floppy on my project. This means that if i only have a DS0 it's alright by me. Do i still have to move that resistor? Thanks!
 
I cheat. Amigamaniac makes a plug in pcb that converts any pc drive to work with the amiga.... lot easier. :)
 
@abraXXious: That's the spirit! LOL :D Nah, i do have Amiga floppies at hand, but just wanted to take the trip down hack-lane... The whole idea of my project is "hack it to death" -sort of.. :)
 
Oh, I love a good hack - problem is that everytime I have looked for hack compatible floppy drives I only find unhackable ones. :(
 
Is not hard to hack a drive: swap (and cut the line, of course) lines 2 x 34.

Join the "new" 34 with the 30.

Move the SMD resistor/jumper to make drive DS0.

Done.:)

A secondary (internal or external) drive will not work, nor even get recognized.:banghead:
 
Ok, here's what i did, although i must admit i'm still a bit confused! :)

TEACHACK.jpg


I cut the trace going to pin 34 (see red circle). Jumpered 30 with 34. Jumpered pin 2 to the IC, comparing it with the picture here: http://www.kipper2k.com/amiga/teac.jpg

But i sense the last step may be wrong. The pin that actually goes from the IC to pin 34, is pin 1 for my drive. Should i change anything? Thanks!

EDIT: Forgot to mention that i moved DS1 to DS0..
 
Can you lift the wire on pin #2 and check if it is not hooked to any other tracks? If so, cut that track too and resolder the wire.

Pin 1, as all odd pins are just ground, they are not connected to anything more.
 
@rkauer: Yet more confused! :D Pin 2 on the connector goes to a lot of places! Pin 1 on the chip (not the big solder blob, but the first pin) goes solely to pin 34 on the connector. What next?
 
I forgot: to make a jumperless drive work as DS0 instead DS1 just swap pins 10 for 16 (a simple cable twist).

Funny that TEAC drives always have the proper ready signal available, so it's just a matter of finding it near the flat cable connector (the white one on the upper right on your picture).
 
This is getting even more confusing! :unsure:
a) Do you mean that moving the SMD resistor was not needed?
b) How am i to find the signal on the connector?
c) What's to be done with pin2?
 
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