4 floppy disk drives on a PC?

From: Scott Stevens <chenmel_at_earthlink.net>
Date: Sun Jan 16 13:07:07 2005

On Sun, 16 Jan 2005 07:47:15 -0800 (PST)
Vintage Computer Festival <vcf_at_siconic.com> wrote:

> I know we've discussed this before but the right Google search terms
> are eluding me.
> Is it possible to get 4 floppy drives onto a PC? If so, how? If I
> stick two controllers in the PC and configure one with a different
> base address and interrupt (assuming I can find a card that allows me
> to do this) will DOS automatically recognize the second controller and
> extend the drive letters C: and D: to the drives on that card?
> --
The original IBM-PC's floppy controller made provisions for four floppy
drives. There are control lines to select up to four drives on the
single interface. They put a 37-pin D-shape connector on the bracket of
early IBM floppy controller cards so you could plug in an expansion case
with two external floppy drives.

I only did this once, as an experiment, to see if I could run my old
WWIV BBS on floppy-drives only, to reduce the noise of the machine. (It
worked, but was much slower.)

I'm pretty sure the 'fix' isn't to plug in an old IBM controller,
though, unless you're already talking about a vintage restoration
project. But the third and fourth select lines should be available on
some controllers.

> Sellam Ismail Vintage Computer
> Festival-------------------------------------------------------------
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Received on Sun Jan 16 2005 - 13:07:07 GMT

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