Date: Thu, 2 Jul 1998 09:06:12 +0300 (IDT)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
To: MetcalJM AT utrc DOT utc DOT com
cc: djgpp AT delorie DOT com, metcalf AT snet DOT net
Subject: Re: Bios Geometry
In-Reply-To: <C77AD5DA2AA7D111859D00805FA72468033685@EXPRESS7>
Message-ID: <Pine.SUN.3.91.980702090552.16260D-100000@is>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Precedence: bulk


On Wed, 1 Jul 1998 MetcalJM AT utrc DOT utc DOT com wrote:

> Can anyone tell me why biosdisk, which I understand uses the 
> DOS INT 0x13 call, is reporting 1 less than the proper number or
> cylinders?

Ralf Brown's Interrupt List indicates (under INT 13h, function 08)
that BIOSes which reserve the last cylinder for testing purposes
return the cylinder count automatically decremented by one.  Perhaps
yours is such a BIOS?

You probably could use function 0Ch to seek to the cylinder past the
last one reported, to see if the BIOS lies to you.