Date: Fri, 1 Oct 1999 00:07:47 +0200 (CEST) From: Wilko Bulte <wilko@yedi.iaf.nl> To: freebsd-hackers@FreeBSD.ORG Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: 2.88Mb floppies Message-ID: <199909302207.AAA44099@yedi.iaf.nl> In-Reply-To: <199909292346.BAA03499@dorifer.heim3.tu-clausthal.de> from Oliver Fromme at "Sep 30, 1999 1:46:41 am"
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As Oliver Fromme wrote ...
> Wilko Bulte wrote in list.freebsd-hackers:
> > As Doug Rabson wrote ...
> > > On Mon, 27 Sep 1999, Wilko Bulte wrote:
> > > > static struct fd_type fd_types[NUMTYPES] =
> > > > {
> > > > { 21,2,0xFF,0x04,82,3444,1,FDC_500KBPS,2,0x0C,2 }, /* 1.72M in HD 3.5in */
> > > > { 18,2,0xFF,0x1B,82,2952,1,FDC_500KBPS,2,0x6C,1 }, /* 1.48M in HD 3.5in */
> > > > { 18,2,0xFF,0x1B,80,2880,1,FDC_500KBPS,2,0x6C,1 }, /* 1.44M in HD 3.5in */
> > >
> > > I have no idea whether that driver can cope with 2.88mb floppies to be
> > > honest. There is only one way to find out...
> >
> > Right. I'll give it a try asap. Somebody sent me a sample entry to
> > add to fd_type. But I want to do a bit of study on the fd source to see
> > if I can understand what all the fields mean.
>
> I once programmed low-level FDC stuff under DOS, so I'm a bit
> familiar with this... The difference between 1.44 and 2.88 Mb
> floppies is that the latter use 36 sectors per track and twice
> the data rate (1 MBit/s). So the entry should look like this:
>
> {36, 2, 0xff, 0x1b, 80, 5760, 1, FDC_125KBPS, 2, 0x6c, 1}
>
> Actually, there should be a #define FDC_1MBPS FDC_125KBPS
Eh, I guess you mean:
{36, 2, 0xff, 0x1b, 80, 5760, 1, FDC_1MBPS, 2, 0x6c, 1} ?
I hope to give it a shot sometime next week.
--
| / o / / _ Arnhem, The Netherlands - Powered by FreeBSD -
|/|/ / / /( (_) Bulte WWW : http://www.tcja.nl http://www.freebsd.org
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