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Date:      Wed, 19 Aug 2020 10:19:38 +0200
From:      Christoph Kukulies <kuku@kukulies.org>
To:        Ruben via freebsd-questions <freebsd-questions@freebsd.org>
Subject:   Re: 5.25" Floppy disk drive not recognized 
Message-ID:  <C7539EA4-F89B-423F-AE95-74E11672AC4B@kukulies.org>
In-Reply-To: <C8787065-AD7F-4F1F-B6D8-563B39F5DA37@kukulies.org>
References:  <wu7ft8pmwpo.fsf@banyan.cs.ait.ac.th> <C8787065-AD7F-4F1F-B6D8-563B39F5DA37@kukulies.org>

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Just want to inform about the progress accessing the 5.25=E2=80=9C =
drive.

It turned out that the cabling of the TEAC-55GFR was wrong. The =
ASRock939A790GMH
MB supports only one floppy drive. It comes with a cable to connect that =
one 3.5=E2=80=9C drive with the typical twist in the cable.
To connect the 5.25 drive I needed a cable with an edge connector. So I =
pressed an edge connector to the cable,
but did that before the twist, resulting in that I had to jumper the =
drive to Device 0.

That resulted in the spindle motor not running when the drive was =
selected.  In the docs for that drive (TEAC) I found a=20
remark, saying that you have to connect pins 10 and 16 when the drive is =
run as Device 0 on a straight cable.

That was all the mess behind it. Now I can happily use fdread to access =
the drive.

=E2=80=94
Christoph




> Am 14.08.2020 um 12:50 schrieb Christoph Kukulies <kuku@kukulies.org>:
>=20
> First problem was to recognize the 5.25=E2=80=9C drive from the BIOS.
> This MB seems to only support one floppydrive. It comes with an ASUS =
branded point to point cable (one connector only).
>=20
> At least I managed that FBSD now recognizes the drive:
>=20
> fdc0: <floppy drive controller (FDE)> port 0x3f0-0x3f5,0x3f7 irq 6 drq =
2 on acpi0
> fd0: <1200-KB 5.25" drive> on fdc0 drive 0
>=20
> But when I=E2=80=99m trying to
> d# dd if=3D/dev/fd0 of=3Dfd_dump=20
> dd: /dev/fd0: Device not configured
> 0+0 records in
> 0+0 records out
> 0 bytes transferred in 0.000252 secs (0 bytes/sec)
> #=20
>=20
>=20
> Do I have to specify  special blocksize?
>=20
> =E2=80=94
> Christoph
>=20
>> Am 14.08.2020 um 10:57 schrieb Olivier <Olivier.Nicole@cs.ait.ac.th>:
>>=20
>> Christoph
>>=20
>>>> I=E2=80=99m trying to access a 5.25=E2=80=9C floppy disk drive if =
anyone here knowing what a =E2=80=9Efloppy=E2=80=9C disk drive is. :)
>>>=20
>>>> MB is a ASRock939A790GMH
>>>=20
>>>> I see the drive in the BIOS although I=E2=80=99m not sure if it is =
really =E2=80=9Econnected=E2=80=9C.
>>>=20
>>>> Anyway, the FreeBSD (12.1) boot doesn=E2=80=99t see the hardware at =
all.
>>=20
>> Launch any old live OS that still had support for floppies and =
migrate
>> your data.
>>=20
>> You should be able to find old ditribution of some Linux, or even =
WinXP.
>>=20
>> Olivier
>=20


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