Topic matter seems to have changed somewhat.
No need for me to relocate to another assembler, DevPac does me just fine. Doesn't matter if it doesn't create binary files because I have a little tool I wrote a long time ago to write the files to disk for me that takes care of everything. I assemble to disk, write the file and job done.
I've got to the bottom of the problem - slightly mistake on my part.
I set the bootpri of the hard drive too high as it was set to 5 instead of 0 so the floppy driver never got a look in.
Turns out my bootblock works perfectly fine!
@StingRay: The 'dos' thing was me typing when tired - I always use 'DOS'
