This instruction shows how to connect a Samsung SFD-321B FDD to a :
On the Internet I found a couple of instructions on howto connect a PC drive to a Panasonic MSX. In my opinion these instructions are to complex and/or not 100% compatible with the original diskdrive. (DiskChange via a switch to ground, extra TTL logic for the RDY signal)
This instruction works with older revisions of the Samsung SFD-321B.
Please make sure that the Samsung SFD-321B you use has a HD sensor (the newest revision of this drive does not have this sensor, causing no support for formatting 720kb DD disks)
To minimize the damage to the mainbord I chose to desolder the 24pin ZIF socket from the defect diskdrive. I’ve put this ZIF socket on a small prototype PCB together with a 17-pin header (even pins 2 -> 34) The odd pins are all connected to ground so not used.
On the small PCB the following connections are made:
24 pin ZIF
34 pin FDD
Drive Select 0
To make the Samsung SFD-321B 100% compatibel the following modifications need te be maded.
Replace jumper DS1 to DS0 (To make it the A drive)
Replace jumper DC to RDY (To put the RDY signal on pin 34)
Solder a wire between DC and OPB (to put DC on pin 2)
Since the diskdrive has a HD Disk sensor, you need to put a piece of tape on the HD hole. To overcome this, it is possible to remove the HD sensor.
Now you’ve got a 100% compatible diskdrive, without modifications to your mainboard.