[Coco] Four floppy drives?

[Arthur Flexser]

This I don't understand.  Surely, the OS-9 driver requires side select to
access the back of the drive, no, even if this fact is transparent to the
user?  :This would seem to be hardware-determined, regardless of the
software.

Art

On Wed, Aug 5, 2015 at 2:46 PM, David Gettle <david17361 at gmail.com> wrote:

> You misunderstood me, under DECB the 4 drives were accessed as SSDD, the
> second side of the drives were not accessed. under OS-9 all 4 drives were
> accessed as DSDD due to the OS-9 software access method, the entire drive
> under OS-9 is accessible from 1 address line.
>
> I'm primarily an OS-9/Nitros9 user
>
> On Mon, Aug 3, 2015 at 12:25 AM, Barry Nelson <
> barry.nelson at amobiledevice.com> wrote:
>
> > I do not understand how the 4th drive could ever be accessed as double
> > sided since the drive select line for the 4th drive is the same line that
> > is used for side select unless you used some custom circuitry and device
> > drivers like I did to get 8 drives working. There would be two problems.
> > First, how would you select side two on the fourth drive? Secondly, any
> > time you selected side 2 on any other drive, you would turn on and select
> > drive 4 as well. Please explain. I'm not saying it can't be done, I got 8
> > drives working, but I did it by building a cable with a custom drive
> select
> > circuit, and rewriting the OS-9 floppy driver.
> >
> > On Aug 1, 2015, at 10:44 PM, coco-request at maltedmedia.com wrote:
> >
> > > Date: Sat, 1 Aug 2015 08:49:32 -0700
> > > From: David Gettle <david17361 at gmail.com>
> > > To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
> > > Subject: Re: [Coco] Four floppy drives?
> > > Message-ID:
> > >       <CABvSbETH1Y69cV4uy=_
> > QmGsiZAnMGoGzC3o6G2At9fbCmFqR_A at mail.gmail.com>
> > > Content-Type: text/plain; charset=UTF-8
> > >
> > > In DECB all 4 drives were formatted as SSDD, under OS-9 they were
> > formatted
> > > as DSDD
> >
> >
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