[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Mystery DOS 3.3 mod.
- Subject: Re: Mystery DOS 3.3 mod.
- From: mjmahon@aol.com (Michael J. Mahon)
- Date: 02 Jul 2001 18:41:05 GMT
- Newsgroups: comp.sys.apple2
- Organization: AOL http://www.aol.com
- References: <Ig207.5186$9K4.1246918@news2-win.server.ntlworld.com>
- Xref: archiver1.google.com comp.sys.apple2:9864
FWIW, the canonical change to DOS 3.3 to make it *very* tolerant
of altered address and data marks (within limits) is:
B942:18
This changes a catchall error return (SEC, RTS) into CLC, RTS,
which, surprisingly, often renders a mildly copy-protected disk
quite easily read and COPYAed by a normal DOS 3.3.
-michael
Email: mjmahon@aol.com
Home page: http://members.aol.com/MJMahon/