I have a 26-3129 disk controller that is acting VERY strangely. I’m using a dual 3 ½” drive setup. When plugged in, it causes the drive 0 light to come on, whether or not there is a disk in the drive. It will NOT read ANY disks in either drive (RS-Dos or NitrOS-9). I have swapped the 24pin chip for another, and get the same result. Ideas? Thanks