5.25" Floppy disk drive not recognized

[Christoph Kukulies]

Just want to inform about the progress accessing the 5.25“ 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“ 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 
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.

—
Christoph




> Am 14.08.2020 um 12:50 schrieb Christoph Kukulies <kuku at kukulies.org>:
> 
> First problem was to recognize the 5.25“ 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).
> 
> At least I managed that FBSD now recognizes the drive:
> 
> 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
> 
> But when I’m trying to
> d# dd if=/dev/fd0 of=fd_dump 
> dd: /dev/fd0: Device not configured
> 0+0 records in
> 0+0 records out
> 0 bytes transferred in 0.000252 secs (0 bytes/sec)
> # 
> 
> 
> Do I have to specify  special blocksize?
> 
> —
> Christoph
> 
>> Am 14.08.2020 um 10:57 schrieb Olivier <Olivier.Nicole at cs.ait.ac.th>:
>> 
>> Christoph
>> 
>>>> I’m trying to access a 5.25“ floppy disk drive if anyone here knowing what a „floppy“ disk drive is. :)
>>> 
>>>> MB is a ASRock939A790GMH
>>> 
>>>> I see the drive in the BIOS although I’m not sure if it is really „connected“.
>>> 
>>>> Anyway, the FreeBSD (12.1) boot doesn’t see the hardware at all.
>> 
>> Launch any old live OS that still had support for floppies and migrate
>> your data.
>> 
>> You should be able to find old ditribution of some Linux, or even WinXP.
>> 
>> Olivier
> 

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