Does you drive use 12V and if so, did you hook it up correctly? Did you set the drive to DS0? Does the drive have a disk-ready sensor? If it's an older drive, does it maybe require more current than the 8245 supplies?
"Disk ready sensor" means, more or less, that you must shortcut to ground the drive pin 34 (usually pins 34 & 33 must be joined). Also you can get the DS0 setting swapping pins 10 & 12 (and I'm always talking from the ribbon perspective); this last mod is not necessary if you can work with a B: unit instead the most common A:
Apart from that there're no other problems, recently I've been trying some new drives for my adapted 8245 and all work fine. Can you post the wiring of your cable?
Using an old PC motherboard floppy connector I was able to keep the original cable...
The only modifications I can remember are the already mentioned, 10 & 12 swapping and the 34 & 33 shortcut (try this). If it still refuses to work, maybe the +5V line of your machine is not giving enough power, try to power the drive using an external psu with 5VDC and at least 1Amp.
i have several jumpers on the pc drive
RY -> ready i presume
DC -> Disk change i presume
DS 0 through 3
M1 M2 -> dunno what that is
IFHD-> dunno what that is either
I dont know if it can help.
is pin2 of the pc diskdrive connected to 5v?
pin2 should be (density select 720k / 1.44 Mb)
this is the configuration in my NMS8245
i changed the original drive after it burned with a pc drive years ago
i recently tried another disk drive and it works too.
i didnt open the drive and didnt make any modification like soldering /disoldering to configure it as ds0.
and it has been working for years
My drive work as drive A ( I swapped pin 6 and pin 7)
msx connector / diskdrive connector
1 index 8
2 dirc 18
3 step 20
4 w data 22
5 w gate 24
6 ds0 12
7 ds1 10
8 side select 32
9 nc 4
10 motor on 16
11 gnd
12 tr00 26
13 wp 28
14 rdata 30
