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

[Jakob Bohm]

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
> drive.
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.

Enjoy

Jakob
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Jakob Bohm, CIO, Partner, WiseMo A/S.  https://www.wisemo.com
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