OK, so I am new to this. I have a 9100a with what appears to be a bad floppy and a temperamental hard drive. So I can probably use it for as long as the HDD lasts, but I would like to make some insurance and to do that I have to start by getting a floppy running. First try, stuff a modern drive on and see what happens. Nothing useful, of course - the thing uses what appears to be a custom drive. I check the pinout. Most of it is OK; here are the problem pins: Pin 2 Density select Listed as spare, but could be set by the 9100a Pin 4 Reserved Change 2 detect Pin 10 Motor enable A DS0 Pin 14 DRV SEL A CHNG1 Pin 34 Disk change READY input on FDD controller Given that I am only interested in Drive A, here is what I am thinking: Pin 2 Cut and (ground or float) on floppy side to ensure always double density Pin 4 Ignore or cut Pin 14 Cut and connect to pin 10 on floppy side Pin 34 looks OK; disk change goes with the disk loaded or not. Maybe jumper to 14 on the controller side. May, however, have a logic level problem. My thinking is that maybe I can get the 9100a to accept an HD floppy, but using its cranky format. If I can create disks in the new format, things could be good. _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist