5.25 Floppy Drive - Jumper Settings \ VOGONS

5.25 Floppy Drive - Jumper Settings

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First post, by Bones558

Posted on 2022-12-11, 02:43

Bones558 Offline

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Joined: 2022-12-10, 23:26

I acquired two vintage 5.25 floppy drives.
I want to hook them to "modern" motherboards I have.
Both motherboards have a single-drive floppy controller that supports all types of 5.25 & 3.5 floppy drives.
I need assistance in getting the jumpers set correctly to work with these motherboards.

Mitsubishi MF504C connecting to a Gigabyte GA-X58A-UD5 motherboard.

Panasonic JU-475-2 connecting to a Gigabyte GA-EP45T-UD3LR motherboard.

I have attached the jumper descriptions that I could find online, but I don't understand what all of these do.

Thanks!

Reply 1 of 2, by Horun

Posted on 2022-12-11, 03:34

Horun Offline

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Welcome to Vogons !
Are these to be the only floppy drive connected or is there also a 3.5" floppy ? Yes the jumper settings can be confusing. Some use DS0 as drive 1, some use DS1 as drive 1...
Typically if using a proper "multi" floppy cable the 3.5" goes at the end after the "twist" in the cable and the 5.25" goes to middle connector. Both need be jumpered as second drive (most newer 3.5" are preset that way).
For a better doc on both the Pana Ju475-2 and Mitsu MF504 see the attached pdf's, it has the default jumpers for PC AT (286 and up)
If you notice the MM, DC and Single Speed are nearly always jumped for PC use...

Added: Will upload all my floppy drive docs collected over the years to archive org, some 270Mb of docs and stuff...

Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun

Reply 2 of 2, by wbahnassi

Posted on 2022-12-11, 17:05

wbahnassi Offline

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The Panasonic page is showing good defaults for PC. Most importantly is the Drive Select. It should be the second, so if the jumpers are DS0,DS1,DS2,DS3, you choose DS1. If the jumpers are DS1,DS2,DS3,DS4, then choose DS2.
This should work for your modern mobos (basically anything 286 and beyond). Somo mobo controllers are some times just incompatible with certain drives, esp. modern mobos.. so keep that in mind and test the drives on older mobos too before concluding they're busted.

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Intel 486 DX2-66, CL5428 VLB, SBPro 2, 2x CD
Intel Pentium 90, Matrox Millenium 2, SB16, 4x CD
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