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Re: [Qemu-discuss] response to BIOS int 0x13 calls

From: Jakob Bohm
Subject: Re: [Qemu-discuss] response to BIOS int 0x13 calls
Date: Mon, 14 Mar 2016 21:57:34 +0100
User-agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0

On 14/03/2016 21:09, Dale R. Worley wrote:
bilsch <address@hidden> writes:
How can an OS partition and format a drive if it doesn't know the
number of sectors?
I have a vague memory that in the earliest days of hard disks on PC's
that you had to enter that number from documentation that came with the
Only to configure the BIOS itself (because there was no
hardware level request the BIOS could use).

On the INT 13h level, there is a much older call (other
than AH=48h), which returns the size in C/H/S form, this
is what OS-es use on machines without the modern LBA calls.


Jakob Bohm, CIO, Partner, WiseMo A/S.  https://www.wisemo.com
Transformervej 29, 2860 Søborg, Denmark.  Direct +45 31 13 16 10
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