reading single-sided format floppies in a PC with a 5.25 inch 1.2 Mbyte drive?

[Chuck(G)]

Glad I could help.

 

[tingo]

Also, for future seekers, I now can confirm that fdcontrol parameters for ND (Norsk Data) format 0b:

fdcontrol -s 8,512,0xff,40,77,500,1,80,0,0,-mfm /dev/fd0

and 17b:

fdcontrol -f 1232 /dev/fd0

works equally well for an 8-inch floppy drive connected to a PC via a FDADAP (straight cables on both sides of the FDADAP).
I am now happily reading my stash of Nd format 8 inch floppies.

Norsk Data floppy formats: http://www.ndwiki.org/wiki/ND_floppy_disks

 

[tingo]

writing also works

writing also works

Just to confirm that writing also works. Steps are as follows:
Set controller to correct format

root@kg-t2# fdcontrol -s 8,512,0xff,40,77,500,1,80,0,0,-mfm /dev/fd1

verify

root@kg-t2# fdcontrol -vF /dev/fd1
/dev/fd1: 308 KB media type
    Format:        8,512,0xff,0x28,77,500,1,0x50,0,0,+auto
    Sector size:    512
    Sectors/track:    8
    Heads/cylinder:    1
    Cylinders/disk:    77
    Transfer rate:    500 kbps
    Sector gap:    40
    Format gap:    80
    Interleave:    0
    Side offset:    0
    Flags        <AUTO>

Format the floppy

root@kg-t2# fdformat -s 8,512,0xff,40,77,500,1,80,0,0,-mfm /dev/fd1
Format 308K floppy `/dev/fd1'? (y/n): y
Processing VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV done.

for some reason the format of the floppy controller changed back to default, so I had to set it again

root@kg-t2# fdcontrol -s 8,512,0xff,40,77,500,1,80,0,0,-mfm /dev/fd1

then it is just to write the image to floppy with dd:

tingo@kg-t2$ sudo dd if=./2018/0326/ND-10005U.image of=/dev/fd1 bs=512
616+0 records in
616+0 records out
315392 bytes transferred in 115.287074 secs (2736 bytes/sec)

that's it.