S-50 / S-550 USB FLOPPY MOD ICON
S-760 USB Floppy Drive Emulator (USB/FDE)

I was able to find an inexpensive solution for connecting a USB/FDE to my S‑550 and W‑30 sampler so I wanted to do the same for my S‑760. Easier said than done!!! After a lot of trials and (mostly) errors, I finally found a way using Jumpers which are not supposed to be used  ;^)

It is important to note that this is not a 100% functional replacement for the original 3.5" Floppy Disk Drive on the S‑760!
Why? Roland incorporated a more expensive 3.5" FDD which serves a dual purpose of reading and saving both low density 720KB DD/DS and high density 1.44MB 2HD/DS disks. This means that you are able to use the "Convert Load" command to convert S‑550 & W‑30 disks over to the S‑760 format. This generic GOTEK model is NOT able to read S‑550 & W‑30 low density 720KB DD/DS disk image files. Thus, it is unable to use the "Convert Load" command. However, you are still able to use the preferred method which is to take a hard drive filled with S‑550 & W‑30 sound disk data and perform the "Convert Load" command


     Model: SFR1M44-FU-DL USB Floppy Drive Emulator for Roland 1.44MB
     Cost: $35 (USD) + FREE Shipping (Item arrived in 10 days... from China to East Coast USA)
     eBay Seller: e2WholeSale

I recommend buying this model from this same vendor since I know it works OK. There must be 100 other emulators, all different models and some are counterfeits


So... just to make it perfectly clear, this GOTEK model will NOT load S‑550 or W‑30 disk image files into the S‑760 because they use a lower density 3.5" floppy disk drive format @ 720KB


The Hardware Installation, Software Installation, Loading Samples and Saving Samples instructions found on the DIY Page are identical except for these Jumper Settings

You will need to use these Jumper Settings on the USB/FDE to make it work with the S‑760
     JUMPER     POSITION       FUNCTION
       J5       OPEN           (not used)
       JA       OPEN           Generates a READY signal on pin 34 of the floppy driver interface
       JC       OPEN           (not used)
       JB       JUMPER         (unknown)
       S0       JUMPER         Drive Select 0
       S1       OPEN           Drive Select 1
       MO       OPEN           Motor Select
S-50 / S-550 ZONE

Installation Notes
  • The original 4‑wire power cable for the FDD inside the S‑760 will not reach from the Main Board to the new GOTEK. You will need to perform a simple modification to the power cable and make it a couple of inches longer or buy a 4-pin extension cable

  • As an option, before installing it inside the S‑760 case, I highly recommend the Mini Toggle Switch Mod DIY which makes loading and saving sample disks 100x easier. The cost is only 50¢ and installation is quite easy

  • If needed, you can find the current S‑760 System Boot Disk v2.24 at the INFO Page. Rename the file to 000.IMG and place it inside the IMG144 directory on the flash drive


So... the big question now is, "Will this work with my S‑750, S‑770 or DJ‑70 sampler?"

From looking at the S‑750 and DJ‑70 Service Manuals, the 3.5" FDD model used is the FZ‑357 which is identical to the S‑760. I would say chances are very good! However, the S‑770 Service Manual shows the 3.5" FDD model used is the FX‑357. I don't know how this differs from the FZ‑357!?! These questions will remain unanswered until I get actual feedback from S‑750, DJ‑70 and S‑770 owners who can verify a working installation

Update 04/17/2017
I received an eMail from an S‑770 owner who has successfully connected this 1.44MB model GOTEK to his sampler. He reports that it is working. The only "gotcha's" are:

1) For some bizarre reason, even though the S-770 3.5" disk drive reads and writes 1.44MB disks, Roland issued the main S-770 System Disk on a 720KB floppy disk!?! The GOTEK can read and write both 720KB and 1.44MB disks but for some quirky reason it won't read the System Disk unless it's converted over to a 1.44MB *.OUT file. How to do that? He got around that problem by using Omniflop to copy the 3.5" system disk and then saved it as a 1.44MB *.OUT file. Edit: I'll post this 1.44MB *.OUT file here for downloading whenever I get a copy of it

2) The S‑770 always goes out to the GOTEK to see if there is a disk to boot from. If there is, it will never boot from the internal SCSI hard drive. I think the solution is explained over at the S‑550/‑30 Hard Drive Boot webpage. i.e. Just fool the S‑770 into thinking there is no floppy disk in the drive by ensuring a "non S‑770" 1.44MB *.OUT file is loaded into the 000 GOTEK flash area
S-50 / S-550 ZONE

info@super-jx.com
Comments/Questions?
The Information On This Page Is Current As Of