>
>Subject: RE: CompuPro floppy controller differences
> From: "Chuck Guzis" <cclist at sydex.com>
> Date: Fri, 15 Sep 2006 22:47:06 -0700
> To: cctalk at classiccmp.org
>
>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.
Or the 5.25 connector either!
>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.
The READY/ can be jumpered for 5.25 floppy use as it's not always there.
The disk 1A has a jumper for this, if the disk1 does not then a red wire
jumper on the back of the board will do this.
Allison
Al, we will have to talk as I got a number of manuals from my NE/MO/KS trip
and it will be awhile before I can put any of them on the web for folks to
use. I have IBM manuals like, Customer Engineering Manual of Instruction
for the 56 Card Verifier; Reference Manual 82, 83, and 84 Sorters; Parts
Catalog 56 Verifier; and many more. I have several large boxes full of
manuals and schematics for all sorts of unit record equipment, computers,
and cards. The GA trip should also produce a gold mine of manuals.
A part of my salvaging has me with these odd little jumpers, where the pins
are not on the board but on the jumper. Since the "sockets" that these
plugged into were not salvageable, and since I don't (as far as I know) have
anything that uses these, they're superfluous to my needs.
I haven't counted them, but if any of you guys have a need for some of these
feel free to contact me off-list, I'm sure it wouldn't take much postage to
get a few in an envelope...
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, a critter that can
be killed but can't be tamed. --Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin
I've established a hotel room block for VCF 9.0:
http://www.vintage.org/2006/main/lodging.php
Room rate is $99. They have very nice rooms with excellent amenities.
I'm working on another block at another local hotel at a lower rate ($79)
with similar amenities. Will update as soon as it's confirmed.
--
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
[ Old computing resources for business || Buy/Sell/Trade Vintage Computers ]
[ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]
I was just contacted by a vendor who says he has the following available:
6 tower units IBM PC/RT (model #6150), with keyboard/mouse and monitors,
plus several boxes of peripherals, CPU, FPU and other interface cards,
several boxes of ESDI hard disks (several new, in box), and many boxes
of software and manuals.
If you are interested in this lot, please email me privately with an offer and
I'll pass in on to the vendor.
Cheers,
Lyle
--
Lyle Bickley
Bickley Consulting West Inc.
Mountain View, CA
http://bickleywest.com
"Black holes are where God is dividing by zero"
--- Jules Richardson <julesrichardsonuk at yahoo.co.uk
> wrote:
> Teo Zenios wrote:
> > I got an ebay find in the mail today, an externa
l
> floppy drive with a
> > port for another floppy. The odd thing about th
is
> drive is that the cable
> > going to it is 25 pin while the connector on th
e
> back for an additional
> > drive is the normal 23 pin variety.
>
> That is odd. Did anything other than an external
> floppy drive ever use the
> Amiga's floppy connector? If so, I wonder if they
> did it that way because the
> 25-way connector saved a bit of money, but they
> still wanted to present a
> 23-way connector to the 'outside world' for
> compatibility. Actually, didn't
> the Amiga support four floppy drives anyway, so
> maybe the 23-way is there for
> plugging in additional drives from other vendors..
.
>
>> snip <<
>
> cheers
>
> Jules
>
I don't think anything else used the external
floppy connector. The Vidi Amiga (capture TV/video i
mage on the Amiga), Turbo Sound whatsit
(I forget it's name but does the same as Vidi
Amiga, but for sound) and the hand scanner
I have all used the serial or parallel port to
connect to my Amiga.
Yes, you can connect 3 external disk drives.
The drives are known as DF0: (internal) and
DF1: to DF3: (external) by the system.
You can also (theoretically) have 4 harddrives
connected aswell, or (like I have) one large
one split into 4 partitions. Known as DH0: to
DH3: unless you leave them unmodified (like I
had) in which case they will be known as TDH0:
to TDH3:
Regards,
Andrew B
aliensrcooluk at yahoo.co.uk
> Various old media (including some hard-sectored 8" floppes which I
> think belong to something Tektronix)
It would be nice if someone could save these.
I got an ebay find in the mail today, an external floppy drive with a port for another floppy. The odd thing about this drive is that the cable going to it is 25 pin while the connector on the back for an additional drive is the normal 23 pin variety.
I opened the case up and found a Citizen OSDC-45C drive which I believe is a 720K DD drive along with a circuit board populated with a cap, some other small caps, and 2 chips (Tesla MH7438 and HD 74LS74AP OL15).
My original idea was to swap out the 720K drive and install a 1.44MB PC one for a Planar Cleanscreen 486 LCD system I have (plus do some rewiring as needed), but I wonder what this drive is actually for.
Any ideas?
>
> From: "Teo Zenios" <teoz at neo.rr.com>
> To: "General Discussion: On-Topic and Off-Topic Posts" <
> cctalk at classiccmp.org>
> Date: Thu, 14 Sep 2006 21:24:08 -0400
> Subject: Odd external Amiga floppy drive
> I got an ebay find in the mail today, an external floppy drive with a port
> for another floppy. The odd thing about this drive is that the cable going
> to it is 25 pin while the connector on the back for an additional drive is
> the normal 23 pin variety.
>
> I opened the case up and found a Citizen OSDC-45C drive which I believe is
> a 720K DD drive along with a circuit board populated with a cap, some other
> small caps, and 2 chips (Tesla MH7438 and HD 74LS74AP OL15).
>
> My original idea was to swap out the 720K drive and install a 1.44MB PC
> one for a Planar Cleanscreen 486 LCD system I have (plus do some rewiring as
> needed), but I wonder what this drive is actually for.
>
> Any ideas?
Ummm, is it for an Amiga?
It may be a third-party amiga drive (can you post a picture, maybe - a link
to the orig. Epay auction would do if it has a picture). Regular floppy
drives could be used on the Amiga floppy port with the addition of a latch
(which is what the extra circuit board contains). (I think the original
Amiga external floppy drives (A1010) had a modified drive thus not needing
the extra latch)
Is the cable going to it really 25 pins? It was common for Amiga floppy
drives to be chainable (thus all connectors 23 pin), so you could have up to
4 drives total.
Joe.
