I have a really compact "PDP-11/23S" chassis that has an 18-bit Q-Bus
backplane (4xQuad) in it. Although the circuitry for the Q-Bus is on
traces of a PC card, there are also wirewrap pins extending out from
the backplane. Am I naive to assume that I can convert this to a
22-bit Q-Bus by wirewrapping four or so lines? Any pointers on how to
do this or on technique?
Thanks,
Dave
Hello List:
I have some interlinked questions for the Assembled Gurus:
I am trying to understand device adressing in the system as a
whole.. is there a good 'base/vector addr for dummies' document I
could be pointed at? I have looked (sunsite, etc) and I'm still
missing something. I *did* find out how to find the backplane jumper
to be removed when installing the RL11... after I discovered it, I
notice some kind soul put a red sleeve on the CA1 pin on each of the
slots....
Am I correct to assume that RL02s and RK05s can coexist and
co-operate in the same system?
I am trying to construct a 'fully loaded' PDP11 system, and I want
to have the entire range of peripherals available, so that I can
perform media and format conversion, as well as have fun running the
thing.
Will one system support the RX02, 9trk, RL02, RK05, DECTAPE, Paper
Tape, consoles and a few terminals, and maybe an Ethernet adapter? I
realize this will take a one or two expansion chassis... but am I
getting overly ambitious for one CPU? Should there be, maybe, two
closely-coupled '11s sharing the load?
Eventually I am aiming for a VAX 11/750. Would it be 'better' to
wait and use it's resources, whatever they might be?
I want to spend a little less time maintaining and a little more
time computing... and I'm dying to run some of the DECUS stuff on my
Machine.
Thanks So Much (in advance)
Cheers
John
I have just colleected a PDP-11/40 which is said to be working apart from
the fact that the PSU has been removed. If I can find a PSU in the future
then this will be my first 'lights and switches' machine.
I was also given 2 Apple ][ s - 1 ][e and 1 ][Eurostar There is a disk
drive with them, but I see from the notice on the back of the drive that
it is supposed to be connected to an interface card. As they have no
cards in them I suppose I will have to wait until I can scrounge one.
Regards
Pete
Hiya List:
In the process of consolidating/thinning down my out-of-control
collection, I think I will place my 11/04 system up for adoption.
It is: 11/04 w/operator's console
7266 CPU
8265 CPU
MOSTEK memory bd, 8001-H-00, unk (8K?)
Plessey mem bd marked 64K depop to 48K
7856 SLU/RTC
7846 RX11
Plessey DMA? (can't remove w/out getting behind rack.)
ACT Quad serial I/O unit.
Plessey disk controller set and backplane (in seperate BA11 which
I'm keeping to use later..)
RX01 dual 8" floppy
(2 ea) CDC Cealus (Ceali?) top-loading drives, accept RL02 packs
(and probably are the same as RL02s) Plessey badged.
Battery back-up unit H775A
A load of cables, mebbe spare boards, engineering printsets, etc.
I am also retaining the DEC rack it's in.
I have had this machine partially on the air... it boots into ODT
at the console, but I've never tried to boot from the big drives or
the floppy. (This machine was removed from service and stored until
I bought it, so it *used* to all work... it's not a mongrel system.)
THE DEAL: I'm in Southern California. (Malibu). I am looking for a
formatter card to use a standard 9-trk drive in a PDP-11/34a system,
as well as the inteface card(s) to hook up my big System Industries
drive to the '34A. I will disassemble and deliver the above items
within a reasonable weekend day's drive, in return for the two
devices mentioned (or at LEAST the tape card.) [Other gear related to
PDP storage or any MINC stuff will be considered, too..]
If, in two or three weeks, there is no response, I will GIVE the
11/04 system to the person who, IMHO, wants it in the worst way, ie.
whining, importuning, pleading, tantrums, etc. will be
considered..... BUT! given that scenario, you must come and pick it
up and cart it off.
This is a good 'starter' machine for someone (hopefully) on the
list who wants to get going in PDP-land.
Note to the adventureous: the combined weight is about 500lb...
shipping ain't an option.......
Cheers
John
> Came back with one other interesting item.
> I never knew there was such a thing as a
> 5.25 inch MITS Altair floppy drive. But here
> it is...
Hmm...why not? I've read that the iCom floppy disk controller
was the first 5.25" disk controller for S-100. Not sure if
that's true though.
-Frank McConnell
There is a very easy free way to get that HD to work. There is a free patch
on the web for HD Setup, and it works, just do a search for it. If you cant'
find it, I'll jump on my mac and email it to you.
-----Original Message-----
From: Daniel A. Seagraves <DSEAGRAV(a)toad.xkl.com>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Saturday, August 08, 1998 10:13 AM
Subject: Re: Macintosh SE questions.
>[Format floppies with Macintosh]
>And then they become 800k disks, which a PC can't read.
>
>[HDD setup stuff costs more than drive is worth.]
>This is another thing I hate, when companies use software checks to enforce
>hardware monopolies. That's SOOOO stupid. Any hardware could do, but the
>O/S makes sure it's a Genuine XXYZ-Corp. device and barfs if it's not.
>Guess I just get to deal with the internal HDD...
>(I think it's 20 meg, but it makes scary noises...)
>Buying new gear for this is out of the question.
>
>-------
So I started playing with my Atari 800.
How do I work with disks? And what's the deal with this "Left Cartridge" /
"Right Cartridge" thing? How does that work with something where it's
obviously inappropriate, like with a 400 or 800XL?
ok
r.
-----Original Message-----
From: MicroAge97(a)aol.com <MicroAge97(a)aol.com>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Sunday, 9 August 1998 3:45
Subject: Re: Apple III & Profile
>hello,
>
>I think you need a program called catylist..
>
>dave
>
Hello
but cant prodos access drives up to 32MB if size?
*Desie*
Came back with one other interesting item.
I never knew there was such a thing as a
5.25 inch MITS Altair floppy drive. But here
it is...
http://home.att.net/~rwood54741/Minidisk.jpg
The bottom photo shows it on top of an
Altair 8 inch drive to give you an
idea of it's size.
Bob Wood
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
Doug wrote:
>You lucky dog! You got this from the guy that was spamming usenet a
while
>back about trading his Altair for an IMSAI, didn't you? He told me the
>Icom wasn't for sale when I asked him about it. Damn.
Doug,
I emailed that guy four times offering to trade an Imsai
for his Attache. He never even replied to me. So most likely
he is still sitting on it. I am guessing that he received
a lot of response so got suspicious about what he had.
This is a different one. I was given the name of an Altair dealer
and did some detective work and connected with one of it's
former employees who had put some stuff in his attic when
they closed the doors. I struck up a deal with him and
last week drove 1600 miles in three days to retrieve it all.
That 800 mile straight through return trip just about did
me in. I'm getting to old for this.
Bob
______________________________________________________
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