[Coco] Format of DEFT.ZIP

[Robert Gault]

I can't speak for the author but I do know what is "wrong" with the .dsk 
image in DEFT.ZIP. There is a header at the front of the image and an 
extra bytes at the end of the image that MESS can't handle. If you use a 
PC raw file editor and remove the first 80 bytes and then make the file 
27600 bytes long, there won't be any FS errors when trying to use the 
disk image.

My guess is that this image was created prior to the current programs 
that work on PCs. The header contains QDISKCoCo which probably is the 
image generating program. I don't know whether the tail end bytes are 
required by any of the programs on the image but MESS expects either a 
current header or 27600 bytes.