🚀 go-pugleaf

OOPS, I guess my question could be misinterpreted.  I want to cause DOS to
write out a copy of DOS.SYS and a copy of DUP.SYS, which it will do only with
the H command.  But I want to do it under the control of an assembly language
program.  I have the DOS 2.0S source listing and a disassembly listing of
DUP.SYS starting from the entry point of record for the H command, but I have
been unable to figure out how to make it all work.

Inside Atari DOS gives this listing for a routine called WRTDOS, which seems
to do the deed, but it doesn't do it for me if I JSR to the advertised
address.  I wonder if I have to do an OPEN or something, as it says in the
fine print "the CLOSE writes the final sector...".

The reason for all this is to set up DOS files on a newly-installed RAMdisk.
DOS won't let me just copy the DOS files over because it knows that the boot
sector would be wrong.

-John S.