[Coco] double disk drive

[Mark Marlette]

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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