> > >From an old PC, I got the following drive:
> > TEAC FD-235HF
>
> Sounds familiar somehow, I think it's a 720 K type...
No, it's a 1.44MB (HD) drive.
> a) Drive select, usually marked with something like "DS0 / DS1 / DS 2
> / D3" (number of Dx can differ), where "DS0" stands for A:, and "DS1"
> stands for B: (ever seen a floppy drive C: on MSX?). If it should be
> the A: drive, set it to DS0, if it's a second drive, set it to "DS1"
> (=factory default)
Yes, I know the way Drive Select works. The trouble was that there are no
markings on the drive PCB.
> b) Some MSX-machines require a 'ready' signal on pin 34 of the
> floppy-connector. To avoid unexpected problems resulting from this,
> look for a jumper named something like "DC / RDY" (sets DiskChange,
> or ReaDY signal on pin 34). If you spot something like that, set it
> to "RDY".
Near the URL Eric mentioned, I found a PDF file containing a
description of jumper positions. I put Ready on pin 34 and DiskChange
on pin 2.
BTW, thanks to Eric for the URL. I thought "this drive is probably
out of production for years, so the company (TEAC) won't have any
info on the net". But in fact they had very detailed info ready for
download.
> Other jumpers can usually be left alone.
I am connecting it to an FS-A1GT (turbo R), which needs both Ready and
DiskChange.
But I still have some troubles with this drive. Symptom: drive will
not spin and the LED only flashes a few times.
I think the problem is somewhere in the order of the Ready and
MotorOn signals. It seems the turbo R won't give MotorOn until it has
received Ready and the drive won't give Ready until it has received
MotorOn. Is this possible?
I came to this idea because I noticed that short-circuiting the
MotorOn signal made the drive work, as did short-circuiting the Ready
signal.
> I found a Teac FD-235F (sounds a lot like it) in a box with trash at
> my place, it's got jumpers named "FG" (forget this one), "D0" (A:),
> "D1" (B:), "DC" (DiskChange, should be empty), "RY" (ReadY, should be
> present), "IR" (?, leave it alone), and "MS" (?, rather not mess with
> it either). "D2" (C:) & "D3" (D:) a bit further on, but not as
> jumpers, just soldering pads. Maybe this helps?
FG connects ground to the drive casing. I don't know about IR and MS.
When I was desperately looking for more jumpers (the jumpers on
drives are slightly smaller than jumpers from I/O cards and PC
mainboards), I remembered I had a defective drive somewhere. I found
it and it turned out to be a TEAC drive as well, but a different type
(maybe 235F, can't remember right now). But this one has far less
jumpers and does have markers. I used it for several years in an 8250
before it (the drive) broke down.
Bye,
Maarten
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