Douglas Goodall has released the source and executables of his PowerC
Utilities for DOS. Available at
http://server.goodall.com/~doug/pub/development/powerc
These utilities do things such as read floppy images into disk files,
restore disk files to floppies, read sectors and make C header files
from the sectors, read prom images from a Data I/O 280
Set Programmer,
dump files in hex and ascii. Also is included code to low-level
format
floppies.