Hi All,
I have a Panasonic ju-256A888PC 3.5 drive that I've connected to my 6128. I've followed the steps on the wiki and my drive seems to partially work.
The 6128 detects the drive ok, and can change to |b, save a little basic program, reset and load the program back. So far so good.
[attach=2]
[attach=3]
I don't seem to be able to format any disks with diskkit3 in cpm. I get an error about the disc being changed.
[attach=4]
[attach=5]
[attach=6]
I've tried multiple floppies with the same result. I've even attempted to create a disc using CPCdiscXP to write the floppy with my PC usb drive and again, the CPC can cat the disc, but has trouble doing much else with it.
Anyone have any ideas?
I appreciate any advice in advance,
Wayne.
Is this one of the drives that uses a fake ready signal? If so then yes they do not work with disckit.
Get parados installed and format discs from there instead.
No, get a proper 3.5" drive with a real Ready signal.
This may help you (http://www.cpcwiki.eu/forum/technical-support/3-5'-(and-5-25')-floppy-disc-drives-with-a-fully-working-ready-signal/?topicseen)
I'm not sure if the CPC version of Disckit works the same as my PCW version, but on the PCW the prog demands that all disks are removed, and will not proceed until disks are removed. It expects to see two drive NOT ready signals (or the specific lack of two ready signals).
The problem is that for a long time, all PC drives of this type are not producing a normal READY signal, and are in effect always ready, so Disckit, and any program that uses such a check, will NOT see the disk as being removed.
If you can find a drive that does handle the ready signal correctly, then great. I've seen reference to some TEAC types that do, and even have jumpers for doing such things, but NOT easy to find.
However, the screen message is a little odd, if this is the problem. My PCW version will NOT even start the format until the disk check is OK. Your screen shot shows that you've got to sector #05 before you had a problem. If the 'ready' signal IS the problem, how've you got to sector 5?
Did you get an earlier prompt, along the lines of 'Remove any disks from BOTH drives, and press any key to continue'?? Again, on my PCW, this question will just keep looping until all drives are empty, although on there is a 'trick' with temp tweaking the cable and lines 8 and 34 but there are limitations with this.
The Dutch (NL) Joyce site has some lists of specific drives that DO produce a ready signal, if you can find one. John Elliot's DU54 program will also format disks, incl with special formats, that may well NOT make the same check.
Just in case the prog is checking sector 5 of the disk and finding something there that should NOT be there, you might try using a magnet to wipe the disk, so that it does appear to be 'virgin', and then try the format process again?
Geoff
If you can find a Teac FD235HF
Info in the PDF
Ray
@CarigsBar Thanks for the heads up about Parados. I've only just recently started acquiring cpc gear that was disposed of years ago when I went of to uni :doh: I'm very much a fan of keeping my CPCs as per original. From my reading I'll need the lowerrom board from Bryce to replace amsdos with pardos externally?
@TFM (http://www.cpcwiki.eu/forum/index.php?action=profile;u=179) I currently only have the one 3.5" drive so thats what I've been testing with. I'll start looking for a drive with the ready signal as it sounds like the best option for compatibility. Did the list of supported drives end up getting created? Most ebay posts dont even list the model number, so it's going to be a bit of experimentation I guess to fine one that support this. From your decription of how ready works, I'm guessing I could confirm the correct operation of the drive by powering it up and monitoring the ready line with my scope.
@geoffb17 I don't get a message before, so maybe a bit different to what you have experienced. I have however just acquired a PCW 8256 with a "broken Screen". I replaced the belt last night and she boots like a new one. ;D I'll be looking to ass a 3.5 drive to it as well. So once I find a suitable drive, I'll be buying a few of them!
@audronic Thanks for the heads up on the Teac, off to ebay et. al. to see what I can find. I'm pretty sure I've contacted you on gumtree before about a monitor if you're the same Ray who often has repaired CPCs for sale??
Wayne.
@opticpow (http://www.cpcwiki.eu/forum/index.php?action=profile;u=1075)
Yes i probably am the one that you have contacted.
Are you in Victoria, near williamstown ?
Also the Sony MPF920 also work with 1 Track Cut and an added lead.
I have 1 only Teac here untested yet.
Ray
Quote from: Audronic on 01:34, 05 September 16
If you can find a Teac FD235HF
Info in the PDF
Ray
I've just found this on ebay, good price, but the back of the drive looks sightly different. Might make it painful if there are different drives with the same FD-235HF model number :picard:
Teac FD 235HF 1 44MB 3 5" Internal Floppy Disk Drive FDD 34 PIN White Faced | (http://www.ebay.com.au/itm/TEAC-FD-235HF-1-44MB-3-5-INTERNAL-FLOPPY-DISK-DRIVE-FDD-34-PIN-WHITE-FACED-/322069598983?hash=item4afcd81307:g:waUAAOSwgApXCgcV)
Wayne
Quote from: Audronic on 02:42, 05 September 16
@opticpow (http://www.cpcwiki.eu/forum/index.php?action=profile;u=1075)
Yes i probably am the one that you have contacted.
Are you in Victoria, near williamstown ?
Also the Sony MPF920 also work with 1 Track Cut and an added lead.
I have 1 only Teac here untested yet.
Ray
No unfortunately I'm not. In NSW. I'm using an LCD which works fine, but I really want a Colour Monitor for sentimental reasons.
Wayne.
Quote from: opticpow on 02:51, 05 September 16
I've just found this on ebay, good price, but the back of the drive looks sightly different. Might make it painful if there are different drives with the same FD-235HF model number :picard:
Teac FD 235HF 1 44MB 3 5" Internal Floppy Disk Drive FDD 34 PIN White Faced | (http://www.ebay.com.au/itm/TEAC-FD-235HF-1-44MB-3-5-INTERNAL-FLOPPY-DISK-DRIVE-FDD-34-PIN-WHITE-FACED-/322069598983?hash=item4afcd81307:g:waUAAOSwgApXCgcV)
Wayne
Hi Wayne
No wrong Version Not suitable only selects drive 0 or 1
Have a look at the other attachment that i have added to the post,
Ray
Quote from: Audronic on 02:55, 05 September 16
Hi Wayne
No wrong Version Not suitable only selects drive 0 or 1
Have a look at the other attachment that i have added to the post,
Ray
Thanks Ray. Found a Sony MPF-920 on ebay for a few bucks. Pulled the trigger, hopefully it does the trick.
Wayne
@opticpow (http://www.cpcwiki.eu/forum/index.php?action=profile;u=1075)
The Sony Document was created by Zaxon (Thanks).
I have modified 3 of these drives and the modification appears to work OK.
Ray
Samsung sfd 321b are the way to go. Simple mod... Move a single 0 ohm resistor from DC to RDY. Job done, proper ready signal and everything is good.
Thumbs up and good luck in finding a good 3.5" drive (I still need to modify one of mine of get a well one too). :)
Quote from: CraigsBar on 16:35, 05 September 16
Samsung sfd 321b are the way to go. Simple mod... Move a single 0 ohm resistor from DC to RDY. Job done, proper ready signal and everything is good.
Thanks for that i had not heard of that being used in an Amstrad.
Ray
Quote from: Audronic on 00:58, 06 September 16
Thanks for that i had not heard of that being used in an Amstrad.
Ray
Samsung is the must have fdd in amstrad. Because is easy to modify and very easy to find because Samsung manufacture It all these years and is cheap.
Quote from: CraigsBar on 16:35, 05 September 16
Samsung sfd 321b are the way to go. Simple mod... Move a single 0 ohm resistor from DC to RDY. Job done, proper ready signal and everything is good.
Thanks. Unfortunately there are none on ebay australia, so hopefully the Sony that @Audronic (http://www.cpcwiki.eu/forum/index.php?action=profile;u=1169) put me onto does the trick. I might order one of the Samsung's for my PCW...
Wayne.
Update: Typos :picard:
A New list of suitable 3.5" floppy drives for The Amstrad CPC 6128/664 and Plus
1) A Pdf
2) a Large photo for the Sony MPF 920 (Other Version)
Ray
Quote from: Audronic on 01:31, 12 September 16
A New list of suitable 3.5" floppy drives for The Amstrad CPC 6128/664 and Plus
1) A Pdf
2) a Large photo for the Sony MPF 920 (Other Version)
Ray
Great info Ray. Worthy of a Wiki Page I would think? @Gryzor (http://www.cpcwiki.eu/forum/index.php?action=profile;u=1)
Wayne.
Sure would; can't vouch for the accuracy, but indeed why a pdf and not a proper page?
Quote from: Audronic on 04:46, 05 September 16
@opticpow (http://www.cpcwiki.eu/forum/index.php?action=profile;u=1075)
The Sony Document was created by Zaxon (Thanks).
I have modified 3 of these drives and the modification appears to work OK.
Ray
Sony drive arrived today. Looking to do the mod tonight or tomorrow.
Wayne.
@Gryzor (http://www.cpcwiki.eu/forum/index.php?action=profile;u=1)
The reason for the PDF is If i send an xxxxxxxx.RTFD from my MAC it seams to be turned into 2 or 3 files at your end which makes no sense.
I will attach the file that made the pDF an see what happens.
Ray
Edit :- OK the file i sent was " The 3.5" Floppy List for CPC Amstrads. 09-2016.rtfd " I see now it has been converted to a ZIP file .
Ok then i can send xxxxxx.rtfd Files Thanks Ray
Edit 2 :-
These are my "Rough" working notes if you wish to use them please edit them to make them usable to the general public Thanks Ray
Edit 3:-
Added Amstrad CPC Floppy Mods to Panasonic JU-257A607P Revision F
Oh no, I wasn't arguing the format :D PDF is fine. I was just wondering why a separate, downloadable pdf instead of a wiki page...
Quote from: Gryzor on 10:07, 14 September 16
Oh no, I wasn't arguing the format :D PDF is fine. I was just wondering why a separate, downloadable pdf instead of a wiki page...
.
As i tried to explain. That when i send an xxxxxxxx.RTFD file it then gets converted to a xxxxxxx.ZIP file by the software that the forum is using ???
How can i do it so it appears as a page on the Forum ???
Ray
Not the forum, the wiki! I meant create a page on the wiki itself with all the info! :D
@Gryzor (http://www.cpcwiki.eu/forum/index.php?action=profile;u=1)
I am unable to send the file to the "Wiki" I have tried several times ? ? ?
Link to file :-
Dropbox - The 3.5" Floppy List Suitable for CPC Amstrads 09-2016.rtfd.zip (https://www.dropbox.com/s/oaiut3s1popazsn/The%203.5%22%20Floppy%20List%20Suitable%20for%20CPC%20Amstrads%2009-2016.rtfd.zip?dl=0)
Thanks Ray
Quote from: Audronic on 01:32, 15 September 16
@Gryzor (http://www.cpcwiki.eu/forum/index.php?action=profile;u=1)
I am unable to send the file to the "Wiki" I have tried several times ? ? ?
Link to file :-
Dropbox - The 3.5" Floppy List Suitable for CPC Amstrads 09-2016.rtfd.zip (https://www.dropbox.com/s/oaiut3s1popazsn/The%203.5%22%20Floppy%20List%20Suitable%20for%20CPC%20Amstrads%2009-2016.rtfd.zip?dl=0)
Thanks Ray
So on the Left-hand side on the Wiki is a set of links. Under the "Tools" and "Wiki-related" section is a link to Upload File, once that's been uploaded a Link can be copied from that and put on the Page you want, or if a new page needs to be created, you can also select Create Page in the "Wiki-related" section.
Quote from: AMSDOS on 07:05, 15 September 16
So on the Left-hand side on the Wiki is a set of links. Under the "Tools" and "Wiki-related" section is a link to Upload File, once that's been uploaded a Link can be copied from that and put on the Page you want, or if a new page needs to be created, you can also select Create Page in the "Wiki-related" section.
""
Under the "Tools" and "Wiki-related" section is a link to Upload File ""Thanks. That worked. Ray
Well yes, but I guess what I'm trying to say is not getting through.
What's the reasoning behind having a pdf file instead of having a proper web page with the contents that are in the pdf file?
And yes, the file was uploaded, but without inserting it somewhere - into a relevant page - it's as good as if it never existed. How are people going to find it? The wiki is not a repository of random files.
And finally, a rtfd file? What use is that?
I really don't get all this, and I'm not sure how to make it any cleared.
And people, try not to answer questions that are technically correct but lead to such issues. We ended up having a nearly worthless file taking up 4MB on the server (and no, it can't be deleted).
Quote from: Gryzor on 09:45, 15 September 16
Well yes, but I guess what I'm trying to say is not getting through.
What's the reasoning behind having a pdf file instead of having a proper web page with the contents that are in the pdf file?
And yes, the file was uploaded, but without inserting it somewhere - into a relevant page - it's as good as if it never existed. How are people going to find it? The wiki is not a repository of random files.
And finally, a rtfd file? What use is that?
I really don't get all this, and I'm not sure how to make it any cleared.
And people, try not to answer questions that are technically correct but lead to such issues. We ended up having a nearly worthless file taking up 4MB on the server (and no, it can't be deleted).
Hi Gryzor
A RTFD file is what gets made up on my MAC that contains Text and Photos.
I don't know how to use the "Wiki" i did the best i could.
If that is not good enough the please somebody edit the page, as i don't know how to.
If i could i would never have offered the information.
Edit :- I don't know how to do web pages. I am a Techo .
Mildly peeved Ray
Quote from: Audronic on 13:35, 15 September 16
Hi Gryzor
A RTFD file is what gets made up on my MAC that contains Text and Photos.
I don't know how to use the "Wiki" i did the best i could.
If that is not good enough the please somebody edit the page, as i don't know how to.
If i could i would never have offered the information.
Edit :- I don't know how to do web pages. I am a Techo .
Mildly peeved Ray
Hey Ray, I'm happy to have go at it. Least I could do considering it was my original request that kicked this off. :o
Wayne.
@opticpow (http://www.cpcwiki.eu/forum/index.php?action=profile;u=1075)
Thanks that would be good.
Ray
Only 4 More drives to test.
Ray
Quote from: Gryzor on 09:45, 15 September 16
And people, try not to answer questions that are technically correct but lead to such issues. We ended up having a nearly worthless file taking up 4MB on the server (and no, it can't be deleted).
Those issues could of been avoided if files of any type was disabled (only allowing certain file types).
Quote from: AMSDOS on 03:24, 16 September 16
Those issues could of been avoided if files of any type was disabled (only allowing certain file types).
What, disable zip files?
Quote from: Audronic on 00:34, 16 September 16
Only 4 More drives to test.
Ray
That's an impressive stack Ray! I'm going to mod my Sony tonight.
Wayne
Sent from my iPhone using Tapatalk
Quote from: Gryzor on 09:12, 16 September 16
What, disable zip files?
Ray was calling it a RTFD file, which I've never heard of. Though I was saying if All Files (*.*) was available for people to send any old thing through, shouldn't it be removed?
The RTFD is a file that (from what I understand) also points to other files; so it's a set of files, all zipped in a single archive. I can disallow certain file types, but if you just archive them anything will pass the tests.
And no, you can't remove anything from a mediawiki installation - even if you delete it it's still there in the database for historical reasons.
Hi All, an update.
I've modded my Sony drive for ready signal. A couple of observations:
- the internal 3" drive works correctly with the 3.5" connected. I can cat a disc and boot into CPM
- The drive light on the 3.5" drive is always lit, but the drive appears to work correctly. I can cat a disk, and save & load basic programs to it (I formatted it on my PC to be 40 Tracks Single Sided)
- I tried formatting a 3.5" disk from disckit3, but it fails. (I'm not sure I should be able to do this?)
Are there any other ways I can confirm that 3.5" ready signal is working correctly? If I monitored the ready signal with my scope, what would I expect to see compared with a drive that does not supply ready?
Thanks,
Wayne.
Have you just permanently set the drive to be ready, or is it only setting the ready signal when it really is ready?
If it's permanently set, then Disckit will have problems as far as I know.
Bryce.
@Bryce (http://www.cpcwiki.eu/forum/index.php?action=profile;u=225)
I'm pretty sure it should be only when really ready. I did this mod that @Audronic (http://www.cpcwiki.eu/forum/index.php?action=profile;u=1169) posted in Reply #6 http://www.cpcwiki.eu/forum/amstrad-cpc-hardware/issues-connecting-3-5'-floppy-to-6128/?action=dlattach;attach=20260 (http://www.cpcwiki.eu/forum/amstrad-cpc-hardware/issues-connecting-3-5'-floppy-to-6128/?action=dlattach;attach=20260)
Wayne.
But isn't that a dirty patch? Using the LED as Ready signal? Or maybe I don't get it? :-\
@opticpow (http://www.cpcwiki.eu/forum/index.php?action=profile;u=1075)
Hi Wayne
I have just modified a 3.5" drive to just have the pins 33 and 34 tied together and the program disckit3 was able to format and copy from drive A to Drive B (3.5")
BUT when i was asked to remove both disks it still thought that the disks were still in there.
Perhaps try Parados 1.1 as that is very good for checking the ready signal.
Or try using an other disk.
Ray
Quote from: TFM on 21:37, 16 September 16
But isn't that a dirty patch? Using the LED as Ready signal? Or maybe I don't get it? :-\
Hi TFM
That is the Info i got from Zaxon some time ago,
It looks like he is using the Disk change switch to set pin 34 ?
Ray
Quote from: TFM on 21:37, 16 September 16
But isn't that a dirty patch? Using the LED as Ready signal? Or maybe I don't get it? :-\
I didn't even think to check out what it was doing. :picard: I'll check out the alternate patch to see if that's any different.
Wayne.
Quote from: Audronic on 00:08, 17 September 16
@opticpow (http://www.cpcwiki.eu/forum/index.php?action=profile;u=1075)
Hi Wayne
I have just modified a 3.5" drive to just have the pins 33 and 34 tied together and the program disckit3 was able to format and copy from drive A to Drive B (3.5")
BUT when i was asked to remove both disks it still thought that the disks were still in there.
Perhaps try Parados 1.1 as that is very good for checking the ready signal.
Or try using an other disk.
Ray
Hi Ray, I'm already using the 33-34 jumper on the floppy cable as per the wiki. I really want to get a true ready signal. Call me a perfectionist ::)
I've ordered a Rom board from Toto so I'll be running Parados on it when It arrives. I prefer to keep my boxes original, so I don't want to replace the AMSDOS rom in my 6128. I have put Parados on my DDI-1 as the ROM was socketed, but I'm still working out the cabling to get the 3.5" on there. I note in @Bryce (http://www.cpcwiki.eu/forum/index.php?action=profile;u=225) 's wiki page that an FD1 cannot be used at the same time as a 3.5" drive. I'm hoping that if I make a modified cable for the DDI-1, do the mod to power it from the CPC and disconnect the power supply jumper from within the FD1, I might be able to swing that.
Or maybe I just get another 6128 to mod so I can have best of both worlds.... Decisions Decisions ::)
Wayne.
For those following along at home, I looked up my scope to some of the signals, and here is what I found:
- Modified Sony 3.5" drive B is shows not ready when empty (high)
- switches to ready when disk is in drive. will stay ready (low) until disk is ejected (see first pic)
[attach=2]
- Amstrad 3" drive B only shows ready (low) MotorOn is low, and DriveSelect1 is low. ie, Drive B is accessed (see second pic)
[attach=3]
One stange thing is the Amstrad 3" drive as B shows activity light on always, but drive works correctly??
Continuing to research.
Wayne.
Quote from: opticpow on 08:04, 17 September 16
One stange thing is the Amstrad 3" drive as B shows activity light on always, but drive works correctly??
Continuing to research.
Wayne.
That's because Amstrad did the drive select decoding the lazy way. Instead of decoding the 2 bit, they used the LSB and to select one drive and inverted it to select the other one.
As such the B drive is always selected except when accessing A.
Quote from: gerald on 09:05, 17 September 16
That's because Amstrad did the drive select decoding the lazy way. Instead of decoding the 2 bit, they used the LSB and to select one drive and inverted it to select the other one.
As such the B drive is always selected except when accessing A.
Cool, thanks for that info. Explains a few things!
Wayne.
The Samsung works in this form :
" Ready
This line becomes active "LOW" when the drive is selected, a disk is
clamped and the spindle motor is up to speed.
(after counting at least two Index pulses)
Otherwise this line goes logical "HIGH" level."
The cronogram are in the Samsung documentación.
http://www.techtravels.org/wp-content/uploads/pefiles/SAMSUNG-SFD321B-070103.pdf (http://www.techtravels.org/wp-content/uploads/pefiles/SAMSUNG-SFD321B-070103.pdf)
Quote from: opticpow on 05:42, 17 September 16
Hi Ray, I'm already using the 33-34 jumper on the floppy cable as per the wiki. I really want to get a true ready signal. Call me a perfectionist ::)
I've ordered a Rom board from Toto so I'll be running Parados on it when It arrives. I prefer to keep my boxes original, so I don't want to replace the AMSDOS rom in my 6128. I have put Parados on my DDI-1 as the ROM was socketed, but I'm still working out the cabling to get the 3.5" on there. I note in @Bryce (http://www.cpcwiki.eu/forum/index.php?action=profile;u=225) 's wiki page that an FD1 cannot be used at the same time as a 3.5" drive. I'm hoping that if I make a modified cable for the DDI-1, do the mod to power it from the CPC and disconnect the power supply jumper from within the FD1, I might be able to swing that.
Or maybe I just get another 6128 to mod so I can have best of both worlds.... Decisions Decisions ::)
Wayne.
That's not quite correct. I really need to clarify that page because it's confusing. You can connect a 3.5 and FD-1 at the same time, however, only with the 3in as A: and the 3.5in as B:. My mod allows you to use a 3.5in drive as A:, but then you can't connect a 3in drive.
(Does that make sense??)
Bryce.
Quote from: Bryce on 12:19, 17 September 16
That's not quite correct. I really need to clarify that page because it's confusing. You can connect a 3.5 and FD-1 at the same time, however, only with the 3in as A: and the 3.5in as B:. My mod allows you to use a 3.5in drive as A:, but then you can't connect a 3in drive.
(Does that make sense??)
Bryce.
Ah ok, that's cool, I'm only wanting to use the 3.5" as B at this stage.
Wayne.
Then you don't need to mod anything, just connect the FD-1 to the connector at the end of the flat cable and the 3.5in drive to the connector nearest the DDI-1.
Bryce.
Quote from: Audronic on 00:11, 17 September 16
It looks like he is using the Disk change switch to set pin 34 ?
Yes, it looks like. And the problem is, that this doesn't work with write protected discs. (And it's not delayed enough).
Quote from: Bryce on 15:45, 17 September 16
Then you don't need to mod anything, just connect the FD-1 to the connector at the end of the flat cable and the 3.5in drive to the connector nearest the DDI-1.
Bryce.
Thanks Bryce, that's good to know. I've gone the long way around to discovering that I can just plug it in as is :P (baring the stupid almost but not quite standard 34 way IDC connector. Thanks Amstrad :picard: )
Edit: Do I not need to worry about the +5v supply on some on the ground connectors?
Hi Wayne
For an external drive 1 (B) added to a 6128
The cable that i use is just a straight 34 Pin cable wired 1-1 34-34 connected to an external floppy configured as drive 1 (B).
Power is provided in my case from an old PC power supply.
Good luck Ray
Quote from: opticpow on 01:37, 18 September 16
Thanks Bryce, that's good to know. I've gone the long way around to discovering that I can just plug it in as is :P (baring the stupid almost but not quite standard 34 way IDC connector. Thanks Amstrad :picard: )
Edit: Do I not need to worry about the +5v supply on some on the ground connectors?
The IDC connector nearest the DDI-1 has these pins removed so that the 5V from the FD-1 only goes to the DDI-1.
Bryce.
OK. So the Samsung SFD 321b has just become my favourite all round floppy.
Just modded one for combination use with a JustCPC 128k and a bare board a600. Mods as follows mean it is now 100% compatible with both boards....
1. Move the 0 ohm resistor from DC to RDY as before.
2. Remove the DS1 solder blob, and create the DS0 one.
This is now a CPC A: drive, all good. But the Amiga expects DC on pin 2 so....
3. Add a jumper wire between the DC point that is *not* connected to pin 34 and pin 2.
All done? You now have a CPC/Amiga A:/DF0 drive that can be swapped between systems as needed.
Thank you Samsung for the nice modable PCB on these drives.
@CraigsBar (http://www.cpcwiki.eu/forum/index.php?action=profile;u=482)
Well done.
Do you have a photo of the finished Board.
Thanks Ray
It's recased at the moment. I'll strip it and photograph it tomorrow, OK?
@CraigsBar (http://www.cpcwiki.eu/forum/index.php?action=profile;u=482)
To save you uncasing .
Edit:- Solved. Top Connection.
Ray
Quote from: Audronic on 23:32, 18 September 16
@CraigsBar (http://www.cpcwiki.eu/forum/index.php?action=profile;u=482)
To save you uncasing .
Edit:- Solved. Top Connection.
Ray
Yep, top one ;)
It works a treat ;)
@CraigsBar (http://www.cpcwiki.eu/forum/index.php?action=profile;u=482)
I was just looking at the Manual for the drive and PIN2
? Did you remove The "" OPA "" Link on the Board ? ?
Link to Manual:-
oem manual sfd-321b - techtravels.org (http://www.techtravels.org/wp-content/uploads/pefiles/SAMSUNG-SFD321B-070103.pdf)
Link to an Other Modification for Amiga http://jope.fi/drives/sfd321b/-====================--
5.3.1 Density Select
This siganl is used to distinguish between 1.6MB and 2MB Mode.
The interface pin No.2 can be used as Density Select Input signal by attaching 0 Ω resistor onto "OPA" short plug when the High density media is inserted. The "HIGH" level designates 2MB Mode and the "LOW" level designates 1.6MB Mode. FDD can tell whether the inserted media is high or Low density by checking the signal coming from mechanical switch which detects the density selecting hole on the media.
2 Mode
(2.0 / 1.0MB) (Non-connection of "OPA")
Automatic Switching
2.0MB : If High density media is inserted. 1.0MB : If Low density media is inserted.
(http://www.cpcwiki.eu/forum/file:///page18image17112)
3 Mode
(2.0 / 1.6 / 1.0MB) (Connection of "OPA")
Automatic Switching with "Density Select"
2.0MB : If High density media is inserted with "Density Select" is "HIGH".
1.6MB : If High density media is inserted with "Density Select" is "LOW".
1.0MB : If Low density media is inserted "Density Select" is not available.
Ray |
Fortunately all the SFD 321b drives I have modded so far have had a density sensor still in place so as long as I use 720k discs (or cover the hole) the the drive works on the amiga with just these 3 mods ;)
@CraigsBar (http://www.cpcwiki.eu/forum/index.php?action=profile;u=482)
Thanks
Ray
Sony MPF920 Floppy Drive Update 25-09-2016
For an Amstrad CPC series machine
This mod works with CPM (Eject Disks)
Correct operation of the Ready signal on Pin 34
Ray