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- Path: sparky!uunet!ogicse!uwm.edu!caen!mtu.edu!abcd.Houghton.MI.US!Jim_Johnson
- From: Jim_Johnson@abcd.Houghton.MI.US (Jim Johnson)
- Newsgroups: comp.sys.ibm.pc.hardware
- Subject: Re: 5.25" diskettes -- curious question
- Message-ID: <Jim_Johnson.0b3x@abcd.Houghton.MI.US>
- Date: 18 Nov 92 14:41:23 GMT
- Article-I.D.: abcd.Jim_Johnson.0b3x
- Distribution: world
- Organization: Amiga BitSwap Central Dispatch
- Lines: 22
-
- In a message dated Wed 18 Nov 92 9:25, <agckk@asuacad.bitnet> wrote:
-
- > Some manufacturer deliver their software on 5.25" diskettes which don't
- > have
- > write-protect holes. How did they write to those diskettes?
-
- A standard 5.25" drive uses a LED transmitter/receiver pair to detect if
- the write protect tab is on or off the diskette. It is fairly easy to
- jumper this so the drive thinks ALL diskettes are writable (or the
- opposite, that NO diskettes are writable).
-
- But actually, software publishers use a high volume diskette duplicating
- machine that doesn't care about write protect tabs. These machines make a
- mirror image of any same media diskette, no matter what the intended
- platform, operating system, and copy protection scheme (if any) will be.
-
- -- Via DLG Pro v0.995
-
- jim_johnson@abcd.houghton.mi.us
- from Calumet, Michigan, USA -the world's former copper mining capital,
- located on Lake Superior and home to America's newest National Park,
- ** The Keweenaw National Historic Park **
-