So I rescued a Tandy 1400HD laptop from the recycling center yesterday. It's a little dirty but otherwise in good shape, powers on with no problems, and successfully boots into DOS from a generic DOS 3.3 floppy disk. However, it doesn't recognize the hard disk or mount it as a drive that I can format. Looking around a bit, I found a piece of documentation errata stating that DOS hard-disk utilities like FDISK don't work on the 1400HD, so I'm figuring that it has some non-standard method of hard-disk access that vanilla DOS doesn't understand. Is there anywhere I can get a 1400-specific boot-disk image to try with this, or does anybody have some other insight into this?