While searching through my collection of old Qbus cards I just
discovered that I have a DSD 4140, which appears to be an RX02
compatible interface to Shugart SA800 or SA850 drives.
The only documentation that I have is a small reference card
which has the jumper configuration and a summary of the commands
(from which it appears that the controller also supports
formatting drives with a write sector command followed by a
couple of magic values written to the data register).
Does anyone have any more information / documentation for this
controller?
Since I don't have any 8" Shugart interface drives available
I'm probably going to have to hook this thing up to a 5.25"
or a 3.5" drive in order to try it out. I seem to recall that
constructing a suitable 50 way to 34 way cable adaptor is
relatively simple, but again I would appreciate references or
more information from anyone who has done this kind of thing
recently.
Michael
Ethan wrote:
<You know why that is? C= Engineering had it all laid-
out and finished, then some suit (the LBF?) told them
to re-do it to use up the orphaned PC cases they had
stacks and stacks of.>
That is a slight exageration. C= Engineering had some
prototype motherboard designs but it wasn't near to a
finished layout.
The A4000 case was originally designed for one of the
A1000+ configurations. Commodore management
decided to salvage part of this development by using
the case in their AGA 'big box' Amiga.
Kind Regards,
Gareth Knight
Jeff wrote:
<I'm sure Iggy or Gareth will correct me if I'm wrong,
but I believe the A530 uses the proprietary GVP SIMMs
that were only used in GVP items.>
Correct. The accelerator used GVP 64 pin SIMMS. It can
use two 1 Meg SIMM32's, or two 4 Meg SIMM32's.
However, it is not possible to mix different sized SIMMs.
Gareth Knight
>
> I thought the first game was AD on early CDCs and later on IBM S/36s?
>
Nope... in fact, Adventure was a relative late-comer, as Star Trek
crept out of the DEC facility in Maynard, MA, and spread across the
academic computing landscape in 1967. Adventure was written in 1970.
-dq
Because of the interest, I have decided to hold a sealed bid auction for
the complete set of Micro Cornucopia magazines.
Every issue from #1 (July 1981, 16 pages) to #53 (May 1990, 96 pages) is
here. The subheading started out "Journal of the Big Board Users",
changed with #7 to "The Single Board Systems Journal", and finally changed
with #23 to "The Micro Technical Journal".
Topics covered included software--BASIC, Pascal, C, Forth, Smalltalk,
Prolog, Wordstar, dBase II, CP/M, MS-DOS, and much more--and
hardware--memory upgrades, EPROM erasers, a logic analyzer, video
circuitry, even a complete Nat Semi 32000 chip set computer with circuit
diagrams. The early issues have almost exclusively Big Board, CP/M, and
Z80 content. The final issues have almost exclusively MS-DOS PC content.
In the middle there is an incredible variety of hard-core technical
articles.
Almost all the issues are perfect. The early issues I purchased as back
issues so they do not even have mailing labels on them. Issue 21,
December-January 1985, has "Sample for Microsystems Readers" printed in
red on the front; Micro Cornucopia was trying to pick up subscribers from
Sol Libes' magazine that folded. That was my first issue and every issue
>from #21 on has mailing labels on them. Issue 29 is damaged; it appears
that this one was on the end of a bundle--the cover is scuffed and there
are small tears at the top and bottom from the binding strap.
End of auction is Friday 6 July 2001 at 8pm. Send bids to
paul(a)wccnet.org. Highest bidder wins (duh!). Payment is by check or
money order and must be received within 30 days (6 August) of auction end.
Shipping costs are IN ADDITION to the bid amount. I can ship via US Mail
or UPS. The magazines weigh about 24 pounds and would cost about $9 to
ship USPS Media Mail without insurance. Shipping is from Monroe, Michigan
48161. No shipping charges if you pick it up, of course.
Paul R. Santa-Maria
Monroe, Michigan USA
paul(a)wccnet.org
Hi,
I'm currently building a simple 6502-based computer trainer and I'd like
to implement a floppy drive on it. Steve Wozniak's Apple Disk II interface
(the FDD interface for the Apple II) is quite simple, but I need the data
that was programmed into the PROMs (P5 and P6 - they're 6309s). If I'm
interpreting the Apple Disk II schematics correctly, then the part
designations are D3 and B3 (for the P5 and P6 ROM, respectively). Ideally,
I'd also like a copy of the PROM data for the later revision of the Disk II
(P5A and P6A).
I've got some info on programming the Disk II, but without the PROM data, I
can't even get the interface running!
Thanks.
--
Phil.
http://www.philpem.f9.co.uk/
philpem(a)bigfoot.com
When I got my Packard Bell '286 back when it was new, I got three diskettes:
DOS 3.3, disk 1
DOS 3.3, disk 2
GWBASIC 3.2
BTW, hello. I still haven't seen my intro message yet.
Craig
-----Original Message-----
From: Gene Ehrich <gehrich(a)tampabay.rr.com>
To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org>
Date: Thursday, July 05, 2001 3:01 PM
Subject: DOD 3.30 Question
>I have a set of DOS 3.30 disks which comprise the following:
>
>1. startup disk,
>2. operating disk
>3. missing
>4. help disk.
>
>Can anybody tell me what should be on the missing disk 3 and what will
>happen if I try to install it?
>
>Thanx
>
>---------------------------------------------------------------------------
------------------
>
>gene(a)ehrich.com
>gehrich(a)tampabay.rr.com
>P.O. Box 3365 Spring Hill Florida 34611-3365
>
>http://www.voicenet.com/~generic
>Computer & Video Game Garage Sale
>
>
>
>
>
>
IBM AS/400 9402 D02
Two hard drives, tape drive, a covered board that I presume is the
motherboard. Looks complete to me, but I don't have much to compare it
to. I haven't tried to run it and have no idea if it works.
The blue ribbon across the top is a little rough; the computer is mildly
marked, but not in especially bad condition.
FS/T. Can be picked up in south-central PA or at VCF East. I'm not
looking for much, just want to get rid of it.
Tom
P.S. Regarding the System 36 in my previous post, I also have a couple
Sys 36 manuals, not originally with that particular 36, which I'll include.
Applefritter
www.applefritter.com
Doug,
Run ZRQCH0 under XXDP(+?) to format the RD's. If your 11/83 has a serial
line at 176500/300 you can even load XXDP from a PC emulating a TU58. I
routinely do this.
Wim
----------
> From: Doug Carman <pdp11(a)bellsouth.net>
> To: classiccmp(a)classiccmp.org
> Subject: RD53 formatter
> Date: Thursday, July 05, 2001 2:52 PM
>
> I have a PDP-11/83 with an RQDX3 disk controller and a pair of RD53
> drives from a MicroVAX II. Since all I can get from both drives are I/O
> errors, I am left to assume that they were once hooked to an RQDX2
> controller and now need to be re-low-level formatted to work with the
> RQDX3. Does anyone know what is required to do this on an 11/83? Was
> there an XXDP diagnostic program that did this?
>
> Thanks.
>
> --
> Doug Carman
> pdp11(a)bellsouth.net
>
I have a PDP-11/83 with an RQDX3 disk controller and a pair of RD53
drives from a MicroVAX II. Since all I can get from both drives are I/O
errors, I am left to assume that they were once hooked to an RQDX2
controller and now need to be re-low-level formatted to work with the
RQDX3. Does anyone know what is required to do this on an 11/83? Was
there an XXDP diagnostic program that did this?
Thanks.
--
Doug Carman
pdp11(a)bellsouth.net
