Hitachi FDD-412A 8 inch floppy drive

joeyd
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Joined: Fri Jan 10, 2020 10:06 pm

Re: Hitachi FDD-412A 8 inch floppy drive

Post by joeyd »

This is the Pinout from the Hitachi Manual for the Drive.
Image

https://photos.google.com/share/AF1QipN ... hieUE3VEJR

m.vgunten
Posts: 16
Joined: Sat Jan 18, 2020 5:56 pm
Location: Bern, Switzerland

Re: Hitachi FDD-412A 8 inch floppy drive

Post by m.vgunten »

Dear Joe

Thank you so much for the pinout ... very useful!

If you are able to connect the FDD-412A drive to Standard 34 Pin IDC Connector I am very interested. Please let me know about your solution!
Until now I am not able to handle the data separator pins ...

Thx Martin

joeyd
Posts: 6
Joined: Fri Jan 10, 2020 10:06 pm

Re: Hitachi FDD-412A 8 inch floppy drive

Post by joeyd »

For the 34 pin connector one needs to know if the FDD412A drive jumpered for RD or VFO?

m.vgunten
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Joined: Sat Jan 18, 2020 5:56 pm
Location: Bern, Switzerland

Re: Hitachi FDD-412A 8 inch floppy drive

Post by m.vgunten »

Unfortunately, I don't have any manuals for the FDD-412A drive or the controller, and I was not able to find anything on the Internet. So any more detailed description would be welcome!
Here is our current jumper assignment in the Okuma Campus 5000 systems:
Okuma Campus 5000 Jumper Settings
Okuma Campus 5000 Jumper Settings
Hitachi_FDD-412A_Jumper.jpg (85.68 KiB) Viewed 509 times
Thank you for your help!

joeyd
Posts: 6
Joined: Fri Jan 10, 2020 10:06 pm

Re: Hitachi FDD-412A 8 inch floppy drive

Post by joeyd »

So my question is which set of jumpers are currently working in the Campus 5000?
The jumpers marked "original" or "maoles"???
And where did you get the other jumper settings?
I'm confused as you have a VFO drive, and are using RD jumper settings in one example and VFO jumper settings in the other.

Image
https://photos.google.com/share/AF1QipN ... hieUE3VEJR

m.vgunten
Posts: 16
Joined: Sat Jan 18, 2020 5:56 pm
Location: Bern, Switzerland

Re: Hitachi FDD-412A 8 inch floppy drive

Post by m.vgunten »

Sorry for the confusion! :o
The drives connected to the Campus 5000 are using the Master jumper settings!
Hitachi_FDD-412A_JumperMaster1.png
Hitachi_FDD-412A_JumperMaster1.png (116.83 KiB) Viewed 504 times
Hitachi_FDD-412A_JumperMaster2.png
Hitachi_FDD-412A_JumperMaster2.png (33.22 KiB) Viewed 504 times
The Original jumper settings are not uesd in our system setup!

m.vgunten
Posts: 16
Joined: Sat Jan 18, 2020 5:56 pm
Location: Bern, Switzerland

Re: Hitachi FDD-412A 8 inch floppy drive

Post by m.vgunten »

My final goal is to emulate/replace the Hitachi FDD-412A 8" floppy drives with my HxC Floppy Emulators (either SD or Gotek)!

joeyd
Posts: 6
Joined: Fri Jan 10, 2020 10:06 pm

Re: Hitachi FDD-412A 8 inch floppy drive

Post by joeyd »

Your "Master" configuration is VFO.

It will require a VFO board for the HxC to work with the controller.

Jeff
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Re: Hitachi FDD-412A 8 inch floppy drive

Post by Jeff »

joeyd wrote:
Sun Sep 27, 2020 6:59 am
Your "Master" configuration is VFO.

It will require a VFO board for the HxC to work with the controller.
I still have some VFO boards here. These was made some years ago to connect the standard/classic SD HxC on some specific NEC PC98 computers needing the VFO signals. I think that they should work too here to replace this drive.

Another path is to use the Pauline dumper/floppy drive simulator : The floppy simulation is based on an FPGA and the VFO signals are generated by the drive simulator :

https://sourceforge.net/p/hxcfloppyemu/ ... ine/trunk/
https://www.youtube.com/watch?v=PZiyms6lo4U
https://sourceforge.net/p/hxcfloppyemu/ ... format=raw

m.vgunten
Posts: 16
Joined: Sat Jan 18, 2020 5:56 pm
Location: Bern, Switzerland

Re: Hitachi FDD-412A 8 inch floppy drive

Post by m.vgunten »

joeyd wrote:
Sun Sep 27, 2020 6:59 am
Your "Master" configuration is VFO.

It will require a VFO board for the HxC to work with the controller.
Thank you joeyd! I will have a closer look on this as soon as possible ...
If you can share some more details about the Hitachi FDD-412A jumper settings (meanings of each jumper) this would be useful :)

m.vgunten
Posts: 16
Joined: Sat Jan 18, 2020 5:56 pm
Location: Bern, Switzerland

Re: Hitachi FDD-412A 8 inch floppy drive

Post by m.vgunten »

Jeff wrote:
Sun Sep 27, 2020 4:00 pm
joeyd wrote:
Sun Sep 27, 2020 6:59 am
Your "Master" configuration is VFO.

It will require a VFO board for the HxC to work with the controller.
I still have some VFO boards here. These was made some years ago to connect the standard/classic SD HxC on some specific NEC PC98 computers needing the VFO signals. I think that they should work too here to replace this drive.

Another path is to use the Pauline dumper/floppy drive simulator : The floppy simulation is based on an FPGA and the VFO signals are generated by the drive simulator :

https://sourceforge.net/p/hxcfloppyemu/ ... ine/trunk/
https://www.youtube.com/watch?v=PZiyms6lo4U
https://sourceforge.net/p/hxcfloppyemu/ ... format=raw
Thank you Jeff! I will take the VFO Boards in consideration ...

Jeff
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Re: Hitachi FDD-412A 8 inch floppy drive

Post by Jeff »

The VFO board :

Image

I can provide the schematic if needed.

m.vgunten
Posts: 16
Joined: Sat Jan 18, 2020 5:56 pm
Location: Bern, Switzerland

Re: Hitachi FDD-412A 8 inch floppy drive

Post by m.vgunten »

Jeff wrote:
Mon Sep 28, 2020 8:28 pm
The VFO board :

Image

I can provide the schematic if needed.
Yes, please! VFO board image and schematic would be welcome!
How many boards are on stock? Do they have a price tag?

Regards, Martin

Jeff
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Re: Hitachi FDD-412A 8 inch floppy drive

Post by Jeff »

Only a few (4 or 5). Where are you based ?

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