Date   : Sat, 29 Oct 2005 00:49:12 +0200 (BST)
From   : Johan Heuseveldt <johan@...>
Subject: Re: Dual Floppies On A Master

Hi David,

On Thu 20 Oct, David Harper wrote:
> Andrew Benham wrote:
> 
> > > Can the beeb address four drives, or just two?
> >
> > The Master hardware supports 3 drives according to the circuit
> > diagram - DS0, DS1, and DS2 are all available on the floppy
> > interface connector.
> > I'm not aware of any software which supports 3 drives though.
> 
> I cannot see any reference to the DS lines on my copy of the circuit
> diagram  (the one at the back of Watford's Adv.Ref.Man.), but I am not
> sure what all  the abbreviations stand for. Which ones are they?

Look at the left of IC4, which is an latch to the 1770/2 FDC.
(refering to the same WE drawing)
The hardware to add are some discrete components: Q1, D1, D2, D3 and R2.

See my other post dealing with that.


greetings,
Johan

-- 
Johan Heuseveldt <johan@...              >
  aka  waarland

  The best place is a Riscy place
 
Anything is possible, unless it's not.