*BSD News Article 88292


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From: j@uriah.heep.sax.de (J Wunsch)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: Installing FreeBSD with two hard drives
Date: 4 Feb 1997 00:01:53 GMT
Organization: Private BSD site, Dresden
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mcampbel@erols.com (M. Campbell or Lee Cremeans ) wrote:

> Also, newer BIOSes do SCSI-style cylinder translation for IDE drive
> with >1024 cylinders.

I wonder how they do this given the restrictions of the arguments to
the int 0x13 calls.

Or do you mean IDE drives that do the translation?  But that's rather
`olds', even the 40 MB Wester Digital disk in my first AT-class
machine could do this (aged 1990).  Still, you'll be restricted to 10
bits for the cylinder number and 16 bits for the head number in the
int 0x13 call the bootstrap is using.

-- 
cheers, J"org

joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)