Date   : Mon, 04 May 2009 01:22:10 +0100
From   : jgh@... (Jonathan Graham Harston)
Subject: ADFS 1.53 patch

Mike Tomlinson wrote:
> Many thanks.  I've just had a browse of JGH's site.  The separate
> references to 8-bit and 16-bit IDE interfaces have gone, and there is
 
The information on Sprow's 16-bit interface is still there. I tried
to clarify the information some time ago and checking the main page
I notice I've still got the link to 16bit/ still inside a comment.
I'll tweek it later.
 
> more?  However, JGH's instructions for the 8 bit interface indicate that
> HDInit is able to obtain geometry from the drive:
> 
> "HDInit:
> To initialise a blank hard drive run $.Utils.HDInit. Select the drive
> with option 'D', then select format with option 'F'. HDInit will examine
> the drive to find how big it is. It will display the size found and ask
> for confirmation before blanking it out. Enter YES to confirm"
> 
> I'm puzzled.  How does HDInit get the drive geometry from an 8-bit
> interface?
 
It sets the geometry to 64 sector per track and 4 heads per
cyclinder which multiplies to 256, so the byte of the drive_id data
that is unreadable will always be zero anyway.
 
-- 
J.G.Harston - jgh@...                - mdfs.net/User/JGH
BBC BASIC for the Sinclair Spectrum - http://mdfs.net/Software/Spectrum