FD1138T and FD1138C

HxC Floppy Emulator on PC88 / PC98 and compatible support
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PepAlacant
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Joined: Wed Dec 30, 2015 3:33 pm

FD1138T and FD1138C

Post by PepAlacant » Wed Dec 30, 2015 3:42 pm

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
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Re: FD1138T and FD1138C

Post by Jeff » Mon Jan 04, 2016 8:35 am

PepAlacant wrote: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
Posts: 3
Joined: Wed Dec 30, 2015 3:33 pm

Re: FD1138T and FD1138C

Post by PepAlacant » Mon Jan 04, 2016 5:52 pm

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
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Re: FD1138T and FD1138C

Post by PepAlacant » Mon Jan 04, 2016 6:28 pm

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
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Re: FD1138T and FD1138C

Post by Jeff » Mon Jan 18, 2016 8:58 am

PepAlacant wrote: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
Posts: 60
Joined: Sun Jan 30, 2011 12:22 am

Re: FD1138T and FD1138C

Post by caius » Mon Apr 04, 2016 8:50 pm

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
Attachments
26PIN_to_34PIN_adapter_bottom.JPG
26PIN_to_34PIN_adapter_bottom.JPG (170.27 KiB) Viewed 3155 times
26PIN_to_34PIN_adapter_top.JPG
26PIN_to_34PIN_adapter_top.JPG (157.14 KiB) Viewed 3155 times

Jeff
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Re: FD1138T and FD1138C

Post by Jeff » Wed Jun 08, 2016 11:11 pm

Thanks for the detailed feedback !
:D

caius
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Re: FD1138T and FD1138C

Post by caius » Wed Jun 08, 2016 11:12 pm

Thanks to you and your wonderful device, Jeff!

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