FD1138T and FD1138C

[PepAlacant]

I have a PC-9821 SE that uses this type of floppy drives. They are 2mode FDD ( 640K - 1,2M ) 26pin

I would want to know if it's possible to connect HxC ( making an adaptor, of course ) to my PC-9821.

Thanks !

[Jeff]

I have a PC-9821 SE that uses this type of floppy drives. They are 2mode FDD ( 640K - 1,2M ) 26pin

I would want to know if it's possible to connect HxC ( making an adaptor, of course ) to my PC-9821.

Thanks !

yes it is.
Is a VFO board needed ?

[PepAlacant]

http://muraoka.ocnk.net/data/muraoka/pr ... da1b82.jpg

This one is the model.

I don't know what an VFO is.

Thanks.

If this VFO is needed, what I have to do ?

[PepAlacant]

I'm reading about and it doesn't have VFO.

So I will need an extra board ? How much is this ? because I need HxC and the board, then.

[Jeff]

I'm reading about and it doesn't have VFO.

So I will need an extra board ? How much is this ? because I need HxC and the board, then.

If the original drive don't have the VFO, no extra VFO board is needed.

[caius]

Hi, today I successfully installed an SD HxC Floppy Emulator on a NEC PC-9821As2 which originally use two FD1138T FDDs.I built a simple adapter from 26PIN of the FD1138T (using original FDD cable, header on motherboard has 30 pins) to 34PIN of the HxC, I took power from the HDD connector using a molex to berg cable (but if you want, you can take it also from PC-9821 FDD cable since +5v is present on pin 1-3-5).Pinout of FD1138T can be found on this document, I think this is valid also for other 26PIN FDDs that come without VFO like FD1138C (not 100% sure though, since there are variants of same model):

http://www.geocities.jp/cpuparts98/FDD/ ... 26CONV.pdf

Here are some pictures and a link of a video.

https://www.youtube.com/watch?v=UhcG2ini8dM

[Jeff]

Thanks for the detailed feedback !

[caius]

Thanks to you and your wonderful device, Jeff!