On Mon, 5 Dec 2005, Michael J. Mahon wrote:
If a program calls RWTS, then it is almost certainly fiddling with certain disk formatting conventions, and very likely patching RWTS in the process. This means that RWTS will, practically speaking, have to be the DOS 3.3 RWTS and reside at $B800.
Ouch. Well, that leaves the File Manager... -uso.