02-07-2016, 09:46 AM
Oh, I thought you were using a 5.25" drive. The pin 33 flippy mode is only for 5.25" drives. For a 3.5" drive, that must be a drive issue. I have never seen this before, and nobody has reported it. Keep in mind that you must always be powering the SCP board first, then powering up the drive. Drives needs to have their state lines set (not floating) on power up or there could be problems. Now, having said that, you can power the SCP and a drive on at the same time (like in an external enclosure) because the SCP initializes the floppy port in about 80us, so it's guaranteed that SCP will have the port line states set correctly prior to the completion of the drive's initialization procedure.