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Article View: comp.os.msdos.programmer
Article #1416

Re: Disk Drive Purchase?

#1416
From: exuptr
Date: Thu, 10 Sep 1992 16:50
33 lines
2253 bytes
In article <BuCBp5.1MF.2@cs.cmu.edu> ralf+@cs.cmu.edu (Ralf Brown) writes:
>From: ralf+@cs.cmu.edu (Ralf Brown)
>Subject: Re: Disk Drive Purchase?
>Date: 10 Sep 92 02:17:27 GMT

>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:
>}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").  

Find me a 386 with bios that will not support a 1224 cylinder drive.

>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.

Which almost everyone does, which is why Disk Manager works and can format
things like the MAXTOR XT-4380.  I haven't seen a BIOS that cannot do this
since 1987.  Admittedly I stay away from older AT's and PS/2's.

Realistically, what machine today has this limitation?

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    exuptr@exu.ericsson.se                       "Don't let the .se fool you"
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From: exuptr@exu.ericsson.se (exuptr@exu.ericsson.se)
Newsgroups: comp.os.msdos.programmer,comp.os.msdos.misc
Subject: Re: Disk Drive Purchase?
Message-ID: <exuptr.476.716143831@exu.ericsson.se>
Date: 10 Sep 92 16:50:31 GMT
References: <2aab4eed@ralf> <exuptr.458.716059101@exu.ericsson.se> <BuCBp5.1MF.2@cs.cmu.edu>
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