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- Newsgroups: comp.os.msdos.misc
- Path: sparky!uunet!cs.utexas.edu!zaphod.mps.ohio-state.edu!magnus.acs.ohio-state.edu!hshulman
- From: hshulman@magnus.acs.ohio-state.edu (Harvey G Shulman)
- Subject: Re: Device driver for QIC-80 tape. Is there one?
- Message-ID: <1992Nov23.212240.20362@magnus.acs.ohio-state.edu>
- Sender: news@magnus.acs.ohio-state.edu
- Nntp-Posting-Host: top.magnus.acs.ohio-state.edu
- Organization: The Ohio State University
- References: <168A5B134.RKSHUKLA@SUVM.SYR.EDU>
- Date: Mon, 23 Nov 1992 21:22:40 GMT
- Lines: 44
-
- Some time ago I tried to get the same information, by posting to
- internet and Compuserve. Colorado Memory and other vendors all
- refused to provide software interfaces to their QIC-80 drives,
- claiming that they weren't meant for use as DOS devices. That
- was not satisfactory but its all they'd tell me. As a result
- I do know where to begin, but not much more.
-
- First you have to decide
- whether you really need a DOS device driver that treats the QIC-80
- as though it were a disk drive. If that's true, give up, it can't
- be done in a satisfactory way. If instead you just want to write and
- read blocks of data in a sequential fashion and are willing to keep track
- of where in a file each record starts, etc, then you've got a chance.
- This is my situation, since all I wanted to do was store large blocks
- of data on the tape and associate a name and starting location with
- each, which is what the backup software that comes with the tape does.
-
- Second, you'd have to get the QIC-80 standard from whatever committee
- keeps track of these things. That's what CMS told me to do, and they can
- provide the name and address if pressed.
-
- Third, you'd have to write a device handler that deals with the
- drive controler and drive directly. There are some proprietary
- tricks involved that may or may not be part of QIC-80. For
- example the CMS drive shares the floppy cable with my
- B drive. The CMS software knows how to turn the tape drive on and
- the floppy off even though they're connected to the same
- interface. How?
-
- Clearly the vendors of QIC-80 drives, like Colorado Memory, have
- solved all of the above and could easily provide the device handler
- needed to perform a simple set of I/O functions. It is annoying and
- frustrating that they refuse to do so when asked. Hopefully one
- among them will see a competitive advantage in making such
- software available, but to date all I've contacted have the same
- attitude as CMS- "our equipment is only intended for DOS file
- backup, and is unusable for other purposes".
-
-
- Harvey Shulman
- Ohio State University
-
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-