Unpublished capabilitiy in a floppy drive (0 or 1)

have been searching for new internal floppy disk drives with one important feature: I must be able to configure them for Drive 0 or Drove 1. (The instruments I am replacing the drives in have a special cable that makes it inconvenient for me to twist the wires.)

I understand they come as drive 1 and most have removed the option to configure them. Some have a solder trace for configuration. and they used to have jumpers. I need to buy about 50 configurable drives at a good price.

Can someone help me with some model numbers of currently sold drives that are configurable?

Original floppy disk drive cables had wires 10-16 seperated and reversed, then connected to the first drive connector. Swap pins 10 and 16, maybe also 12 and 14.

I have been converting current 3.5inch floppy drives this way as replacements in IBM Control units.

MikeJG

For my 17 year on computer, haven't seen one come with any jumper to set 0/1. It maybe easier to make/find an adapter to do that if you can fix the cable.

Pineapple

The last time I saw what you refer to was a very old 720Kb drive since they have been 1.4Mb drives that stopped.

Here is the control-Configuration of Floppy drives for A & B

I have a adaptor somewhere that flipped the drives numbers by moving the jumper.

For the most it is pin to pin.

I know, it's stupid that all drives are set to 1. I repaired ATARI computers for a long, long time. They also had their first drive as 0. In the past you could buy diskdrives that had a jumper. So that was no problem.

But since they stopped manufactoring drives with a jumper, you have to check out the printed circuit board. I NEVER had a drive where there was not a solder pad. You'll probably need a magnifying glass to find it. Often there's a lot of solder islands close together. Find the one that says "Drive 0". Take good care, 'cause there also will be pads for making the drive 1 sided, and for DD (Double Density) or HD (High Density). On some older drives, you'll have to remove a pad (the pad for drive 1), but nowadays, the drive is standard 1 until you solder the pads.

Good Luck !

I know : it's like searching for a needle in a haystack, but believe me, there is ALWAYS one

Have you tried a supper conducting magnet to find that needle?