CompuPro floppy controller differences

Richard A. Cini rcini at
Fri Sep 15 17:38:08 CDT 2006

Ok, I got the CompuPro Disk 1 controller last night and have a quick
question about configuring it. The card can handle both 8" and 5.25" drives,
and the plan is to use a 5.25" 1.2mb PC drive as a substitute for the 8"
drive (I only have access to 8" disk images). 

Now, when I do this, do I leave the jumpers on the card configured for the
8" drive but use the 5.25" interface connector, or do I have to configure
the jumpers for a 5.25" drive? I'm thinking leave it for 8" except to the
extent that the jumper had to do with swapping signals on the drive
interface connector.


Rich Cini
Collector of classic computers
Lead engineer, Altair32 Emulator
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-----Original Message-----
From: cctech-bounces at [mailto:cctech-bounces at]
On Behaf Of Fred Cisin
Sent: Sunday, September 10, 2006 3:42 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: RE: CompuPro floppy controller differences

> >	I looked at the CompuPro disk image on Dave Dunfield's site and it's
> >for an 8" drive. The defining thing for me is getting a CP/M 2.2 image in
> >5.25" format. I've found another controller, from CCS (California
> >Systems) that might work, too. So does anyone have a 5.25" CP/M 80 image
> >either of these two boards?

DSDD 8" should fit just fine on "1.2M" 5.25"

On Sun, 10 Sep 2006, Allison wrote:
> All my CCS disks are 8" I'd have to look to see if the controller even did
> 5.25 it's been so long.  I do remember the CCS used a banking scheme that
> didn't agree with most of my systems.

CCS did have some 5.25" disk formats (both 48tpi and 96tpi) supported.
I have no idea whether they ever used them as boot disks.

Grumpy Ol' Fred     		cisin at

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