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- From: ralf+@cs.cmu.edu (Ralf Brown)
- Newsgroups: comp.os.msdos.programmer,comp.os.msdos.misc
- Subject: Re: Disk Drive Purchase?
- Message-ID: <BuCBp5.1MF.2@cs.cmu.edu>
- Date: 10 Sep 92 02:17:27 GMT
- Article-I.D.: cs.BuCBp5.1MF.2
- References: <2aab4eed@ralf> <exuptr.458.716059101@exu.ericsson.se>
- Sender: news@cs.cmu.edu (Usenet News System)
- Organization: School of Computer Science, Carnegie Mellon
- Lines: 19
- Nntp-Posting-Host: b.gp.cs.cmu.edu
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- In article <exuptr.458.716059101@exu.ericsson.se> exuptr@exu.ericsson.se (exuptr@exu.ericsson.se) writes:
- }In article <2aab4eed@ralf> Ralf.Brown@B.GP.CS.CMU.EDU writes:
- }>Yeah, but the geometry translation is based on the limits of the BIOS, which
- }>are 1024 cyl x 64 heads x 63 sectors/track--a little less than 4G sectors
- }
- }Now this one makes sense. Except that BIOS does not limit you to 1024
- }cylinders, that is DOS. So theoretically you could have 2048 x 64 x 63.
-
- Sorry, but that is indeed a BIOS limit, since the BIOS only uses ten bits
- to specify the cylinder (there are a couple of BIOSes which use twelve
- bits, but they aren't "standard"). DOS is simply using the standard BIOS
- interface--you could always write a device driver that knows about the
- two nonstandard cylinder bits if you have such a BIOS.
-
- --
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