Team… I did make an error in talking about heads. It is the sectors-per-track that is the signature place where I see the failures. It may be something else entirely. I have tried every conceivable trick including ALL of what has been said elsewhere on this thread. In particular the dloader tricks. I have been told that there are new and old flavours of these disks, and there may be an issue with PIO… they are ALL accessible and acceptable to the USB2 mass storage, they all work to load the boot image from its expected home accorting to the bootloader… they are simply not accessible at all through devb-eide once the image starts. I am in the last chamber of the Adventure game…
respectfully
BJ