10 Sep
2006
10 Sep
'06
9:13 a.m.
Subject: RE: CompuPro floppy controller differences
From: "Richard A. Cini" <rcini at optonline.net>
Date: Sat, 09 Sep 2006 13:59:08 -0400
To: "'General Discussion: On-Topic Posts Only'" <cctech at
classiccmp.org>
All:
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 Computer
Systems) that might work, too. So does anyone have a 5.25" CP/M 80 image for
either of these two boards?
Thanks.
Rich
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.
Allison
10 Sep
10 Sep
12:31 p.m.
On 9/10/2006 at 9:13 AM 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.
Yup, I've got samples for a CCS with 256, 512 and 1024 bytes/sector. All
are 48 tpi, MFM.
Cheers,
Chuck
3:41 p.m.
> 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 Computer
>Systems) that might work, too. So does anyone have a 5.25" CP/M 80 image for
>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 xenosoft.com
15 Sep
15 Sep
6:38 p.m.
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.
Thoughts?
Rich
Rich Cini
Collector of classic computers
Lead engineer, Altair32 Emulator
Web site: http://highgate.comm.sfu.ca/~rcini/classiccmp/
Web site: http://www.altair32.com/
/***************************************************/
-----Original Message-----
From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org]
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
Computer
>Systems) that might work, too. So does anyone have
a 5.25" CP/M 80 image
for
>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 xenosoft.com
10:28 p.m.
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.
Thoughts?
Normally when replacing an 8" with a 5.25" HD, I would simply leave the
system configured for an 8" drive and make an adapter to connect the
5.25" drive to the 8" connector - I have not looked at this in detail, however
as long as you can set jumpers to connect the right signals to the right
places on the 5.25" connector it should work. Just make sure the signals
are the same ones that would go the the 8" Drive (no extra conditioning
etc.)
Dave
--
dave06a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Collector of vintage computing equipment:
http://www.classiccmp.org/dunfield/index.html
9:37 p.m.
Gotcha. Thanks.
Rich
Rich Cini
Collector of classic computers
Lead engineer, Altair32 Emulator
Web site: http://highgate.comm.sfu.ca/~rcini/classiccmp/
Web site: http://www.altair32.com/
/***************************************************/
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
On Behalf Of Dave Dunfield
Sent: Friday, September 15, 2006 10:29 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: RE: CompuPro floppy controller differences
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.
Thoughts?
Normally when replacing an 8" with a 5.25" HD, I would simply leave the
system configured for an 8" drive and make an adapter to connect the
5.25" drive to the 8" connector - I have not looked at this in detail,
however
as long as you can set jumpers to connect the right signals to the right
places on the 5.25" connector it should work. Just make sure the signals
are the same ones that would go the the 8" Drive (no extra conditioning
etc.)
Dave
--
dave06a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Collector of vintage computing equipment:
http://www.classiccmp.org/dunfield/index.html
16 Sep
16 Sep
1:47 a.m.
On 9/15/2006 at 9:37 PM Richard A. Cini wrote:
Thoughts?
What Dave said, but a few reminders.
First, make sure that the drive is jumpered for high density by default,
since the density select line won't be active on the 8" connector.
Most 1.2MB 5.25" drives are jumpered to provide DISK CHANGED/ status on
pin 34; I believe the Disk 1 requires READY/, so change your jumpers
accordingly.
Cheers,
Chuck
2:27 p.m.
The board has all sorts of jumpers which is good. So I can pick and choose
which ones to change with no problem.
When reading the book it seems that if you want to use a "minifloppy" drive,
there are several components you need to change -- a bunch of resistors, a
crystal and a coil. I presume this is to change the recording frequency and
spindle speed for 5.25" disks. I'm going to try it without modifications
first, but since the HD drive is equivalent to an 8" drive for recording
purposes, I don't think I have to change them.
As much as I dislike PeeCees, at least they have the benefit of
standardization.
Rich
Rich Cini
Collector of classic computers
Lead engineer, Altair32 Emulator
Web site: http://highgate.comm.sfu.ca/~rcini/classiccmp/
Web site: http://www.altair32.com/
/***************************************************/
-----Original Message-----
From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org]
On Behalf Of Chuck Guzis
Sent: Saturday, September 16, 2006 1:47 AM
To: cctalk at classiccmp.org
Subject: RE: CompuPro floppy controller differences
On 9/15/2006 at 9:37 PM Richard A. Cini wrote:
Thoughts?
What Dave said, but a few reminders.
First, make sure that the drive is jumpered for high density by default,
since the density select line won't be active on the 8" connector.
Most 1.2MB 5.25" drives are jumpered to provide DISK CHANGED/ status on
pin 34; I believe the Disk 1 requires READY/, so change your jumpers
accordingly.
Cheers,
Chuck
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days inactive
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7 comments
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ajp166＠bellatlantic.net -
cclist＠sydex.com -
cisin＠xenosoft.com -
dave06a＠dunfield.com -
rcini＠optonline.net