On Jun 16, 16:57, David V. Corbin wrote: typically routed Depends on the OS, but I believe DOS does so, for floppies at least, unless you use a third party driver. However, I thought one of the points of disabling an onboard device was to allow you to use one on an additional card (other reasons exist, eg preventing startup errors if you have removed floppies for security). I think I've solved the problem, insofar as I've found a combination of settings that works. I decided to make a list of the all possible permutations of relevant links on the ISA controllers and enable/disable/auto settings in the BIOS, work methodically through them, and write down the results. Mainly because I couldn't remember exactly what perms produced which problems last night! One combination of disabling the onboard controller, using a particular card (WDAT-240), having both floppies on that card, worked. Odd, because it was an obvious one that I was sure I'd tried before; perhaps I did one BIOS reset too few or something. I've not tested single density yet. And I'm not sure about reading/formatting/writing DD disks in the HD 5.25" drive. But it's well after 1am here, and I've run out of time again... further. may Any other suggestions are welcome :-) -- Pete Peter Turnbull Network Manager University of York