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- Newsgroups: comp.os.msdos.misc
- Path: sparky!uunet!microsoft!hexnut!jenk
- From: jenk@microsoft.com (Jen Kilmer)
- Subject: Re: 3.5" floppy on ibm pc/XT......
- Message-ID: <1992Nov06.035238.2438@microsoft.com>
- Date: 06 Nov 92 03:52:38 GMT
- Organization: Microsoft Corporation
- References: <eJwoTB2w165w@willard.UUCP> <Bx76p6.JA3@acsu.buffalo.edu>
- Lines: 41
-
- In article <Bx76p6.JA3@acsu.buffalo.edu> dudek@acsu.buffalo.edu (The Cybard=) writes:
- >ninja@willard.UUCP writes:
- >
- >>
- >> To use a 3.5 " floppy on an IBM PC/XT, you need...
- >> : a new bios chip for the machine
- >> : high density 8 bit floppy controller card
- >> : dos 3.30 and above....
- >
- >There is an easier way. Put this line in your config.sys:
- >
- >driveparm=^A^A^A/d:X /c /f:Y
- > ^
- > /|\ Refer to your DOS manual for the proper values of X and Y.
- > |
- > |
- > +--- insert three control-A characters here. Edlin works best.
- >
-
- Drivparm was added in MS-DOS 3.20; MS-DOS 3.30 added 1.44M support.
-
- There is a bug in the 3.30 IO.SYS CONFIG.SYS parser which makes it
- not recognize drivparm as a CONFIG.SYS command. This was fixed in
- MS-DOS 3.30a, or, as above, you can work around it.
-
- Only problem with drivparm is that it is BIOS-dependent. Drivparm
- makes MS-DOS treat the drive as what you specified with drivparm.
- So if you specify using drivparm that your 3.5" floppy drive is
- 3.5", MS-DOS will treat it as such, and if you ask, say, to format
- a floppy in that drive (using FORMAT or whatever) MS-DOS will ask
- the BIOS to format a disk in that 3.5" drive.
-
- Some BIOSes will then format the disk in the 3.5" drive.
- Other BIOSes will not know how to handle that sector/track combination
- that DOS asked for, or will try to confirm that MS-DOS is giving it the
- 'correct' values for the type of drive, and when the BIOS notices
- that MS-DOS gave it 'bogus' values, it will [in a manner of speaking]
- have a good laugh at DOS and tell it to jump off a cliff. 3.5"??
- That's a [whatever the BIOS thinks it is], DOS, don't be stupid.
-
- -jen
-