User`s manual

NNEWFILE.BIN<cr>
—_
Now you can use the Write command to write the new data to the disk.
DEBUG will write an exact image of CS:CX bytes to the disk starting
at an offset of 0100H bytes.
W<cr>
Writing 1000H bytes
—_
Now use GHEX to make it an INTEL.HEX file, or use PGMX’s binary
file transfer.
Chapter 9 Debug.Com Model 9000
Page 34