11 February 2010, 19:25 | #101 |
no c= no fun
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its does not work even when I put it 'unmodified'.
The old drive (Epson SMD-300) has some jumpers on the back, looks like is set as device 0 .. chris |
11 February 2010, 19:55 | #102 |
I hate potatos and shirts
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Then put it to device 1 (ds1) and it will work.
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11 February 2010, 21:09 | #103 |
no c= no fun
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12 February 2010, 15:32 | #104 | |
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Quote:
It's in German but the pics speak for themselves, i'll try to photograph mine and post it later on. |
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22 March 2010, 13:34 | #105 |
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Problem with Samsung SFD-321B Rev T1; Rev T3 and Rev A
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. |
23 March 2010, 23:37 | #106 |
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@Paulo becas
How are you generating the RDY logic? If you do not source this signal correctly, XCopy will fail when you copy disks. |
31 March 2010, 17:19 | #107 | |
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Quote:
I've double check it and i even modified another one that i had and get the same result. |
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12 July 2010, 16:59 | #108 | |
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Sony MFP920 Z/131 drive mod for Amiga
Paulo/all,
Sony MPF920 Z/131 drive - where are you finding the READY Signal from? I have modified one by moving the CHNG signal to the correct PIN. I found one post (sorry lost it) that showed a RDY signal however it's not right.... (on the oscilloscope it's jumping around all over the place). Any help much appreciated. Thanks Quote:
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12 July 2010, 19:30 | #109 | |
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Quote:
http://eab.abime.net/showthread.php?t=43265 |
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12 July 2010, 20:11 | #110 |
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Kipper, great link, but no sign of a mod specific to the MPF920-Z/131...
Tried a mod on a mitsumi drive (easy since rdy clearly marked on pcb). To test the ready line I simply: power up the drive assert ds0 assert motor on rdy goes low, then I stop the motor with my thumb. drive detects spin has stopped and deasserts the rdy line. trouble is I cannot seem to find a pad on the Z/131 that shows this same characteristic... unless I am doing something wrong...? |
12 July 2010, 20:42 | #111 | |
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Quote:
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13 July 2010, 11:05 | #112 |
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Hi Kipper,
3 pictures attached of an unmodified MFP920-Z/131 Sony drive See what you think.... |
13 July 2010, 20:02 | #113 | |
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Quote:
Hi, this board is almost identical to the Z/121, some of the pads are in a different area slightly. Do the mod as shown in my thread as for the Sony Z/121 (use the HiRes pic) ... Only one minor difference, On the square IC, follow the trace from pin 34 of the square IC to where it goes to the other IC (Pin 18) which is the 3rd pin up on the left side of that IC. Connect the wire from pin 34 of the floppy header to the solder pad just to the left of pin 18. And thats it. Remember, the Amiga will not recognise 1.44mb floppy discs, cover the tabs and it will work fine |
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13 July 2010, 21:11 | #114 |
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Hi Kipper,
Hmm... exactly like the mod I originally mentioned in my first post. Pin 18 looks near as dammit the INDEX signal. It is *NOT* RDY. On a 2 channel scope it is going low at exactly the same time as the INDEX signal.... Using this mod works by chance since the signal goes low at some point.... We're back to square one....any help much appreciated. |
23 July 2010, 12:37 | #115 |
70X7
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hello, can i have the "Samsung SFD-321B" modification pic plz ?
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25 July 2010, 14:51 | #116 |
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What board revision do you have?
Rev WT-05: http://i32.tinypic.com/59wro0.jpg Other boards may have the points in different places, but the mod is the same: Solder DS0 instead of DS1. Desolder resistor from DC and put it in RDY. Solder pin 2 of floppy connector to point of DC that goes in the IC. Last edited by elspero; 25 July 2010 at 14:57. |
25 July 2010, 23:06 | #117 |
70X7
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yep,i have rdy make one and working fine,soon my photo mod..
thanks a lot |
28 July 2010, 05:52 | #118 |
I hate potatos and shirts
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I can confirm that the modification from post #18 from this very thread will work perfectly with an YE-Data YED-FC701WH, which is almost the same board of the YED-702D-6037D.
Researching a bit more the modification I did using the El Piloto's guide I stumble on a minor problem: besides it works flawlessly inside the Amiga, you can't use more than one drive, no matter what: any external drive will not work at all. So the mod is good only for people with just one drive. |
28 July 2010, 16:44 | #119 |
70X7
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Well.. here is my mod ,i follow "narmi" pic,
and working fine tow revision of Samsung SFD 321B, the SS-02 and KC-04 no test yet the Revision WT-02, WT-04 The revision SS-02 The mod.. |
21 August 2010, 16:57 | #120 |
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As a follow up to my floppy thread I've done a whole load more research on Amiga Floppies at http://www.bret-mcgee.me.uk. Take a look, you might find it useful.
Any questions I'll try to answer. Cheers Bret |
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