Thanks again, Dave!

Simple : Several of us (including myself) don't have space to set up another machine, like a modern PC. You suggested a KVM switch. As I understand it, this is a device that switches a single keyboard, monitor and mouse between 2 machines. But most, if not all, only work for machines which take PC-like keyboards and VGA monitors (forget about the mouse, OK :-)). Which means it wouldn't svce any space here becuase none of the machines on or around my desk use such peripherals. So a KVM switch couldn't be used to share one of the monitors and keyboards with the new PC that runs imagedisk. Oh, I probalby could, but I like to use the original keyboards on my classics... Anyewy, if I am going to go to all that work, I might as well design a disk imaging device, which certainly wouldn't use an 8272 controller. If I used a single chip, it would be one of the WD ones (which have a much more useful read track command). Or I might just make something like a Catweasel and grab the transitions on the read data line from the drive an analuse them in software later. -tony