[Coco] double disk drive

[Sylvain Rousseau]

You are right.

The poke table is shown on the Bob's web page.

Sylvain

At 09:48 2005-02-04, you wrote:



>You can change the drive select and side selects all through software. I

>did this many years ago. Modify the tables in DECB's ROM to do what you

>want them to do. I messed with side select but I'm pretty sure you can

>do the drive select as well. There was about 3-4 tables that the bits

>had to be massaged.

>

>Art F. could verify this for sure... Yes?????

>

>Depending on what type of controller you had then just select the

>correct DECB DOS and go. Under the SuperIDE with 4 flashable ROM DOS, a

>single poke, reset and you are running the selected DOS. Or just flip a

>switch and go......

>

>Mark

>

>

>Quoting George Ramsower <yahoo at dvdplayersonly.com>:

>

> > If I remember correctly (I did it )...about a thousand years ago..

> >

> > You wire the jumpers and make a wiring change on the FDC cable to

> > make the drive select to force the floppy drives to:

> >

> > Drive 0 was side A of drive 0

> > Drive 1 was side B of drive 0

> > Drive 2 was side A of drive 1

> > Drive 3 was side B of drive 1

> >

> > I saw this thread and had to inject something.. it rang a bell !!!

> >

> > I'll think on this and see if I can recall how this was done.

> >

> > George

> >   ----- Original Message -----

> >   From: David

> >   To: CoCoList for Color Computer Enthusiasts

> >   Sent: Thursday, February 03, 2005 7:16 PM

> >   Subject: Re: [Coco] double disk drive

> >

> >

> >   So if i get you correctly, the switch basically reverses which

> > drive is

> >   plugged in where?

> >

> >   David

> >   ----- Original Message -----

> >   From: "Bruce W. Calkins" <brucecalkins at bellsouth.net>

> >   To: "CoCoList for Color Computer Enthusiasts"

> > <coco at maltedmedia.com>

> >   Sent: Friday, February 04, 2005 11:58 AM

> >   Subject: Re: [Coco] double disk drive

> >

> >

> >   > Can you wire up a reversing switch?  You will need to have the

> > drive one

> >   > and

> >   > drive two lines from the controller go to the center terminals of

> > a double

> >   > pole double throw switch.  The lines from the drives will go to

> > one set of

> >   > outside terminals and then a pair of wires to cross over from

> > that outside

> >   > terminal pair to the opposite terminals.

> >   >

> >   > Bruce W.

> >   >

> >   >

> >   >

> >   >> Hello,

> >   >>

> >   >> I just upgrade my FD500 floppy drive.

> >   >>

> >   >> I add a 3 1/2" drive on it and I want to know how to add a

> > switch that

> >   >> let

> >   >> me select which of the 2 drives is the drive 0.

> >   >>

> >   >> Could you help me?

> >   >>

> >   >> Sylvain

> >   >

> >   >

> >   >

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Sylvain Rousseau, ing./P.Eng.
Comlab inc.
2300 Leon-Harmel, suite 220
Quebec (Quebec)
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Tel   : 418-682-3380
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