On Feb 6, 8:29 am, "Michael J. Mahon" <mjma...@aol.com> wrote: > DMn2004404 wrote: > > Everything except an "OpenApple-Control-Reset," right? > > Even then, all of the "user" part of page 3 is safe: $300..$3CF > are untouched. $3D0..$3FF are used by the system. Page 3 is trashed during a Disk II controller boot. Cheers, Nick.