>Ok, now the "panel" if you can call it that on the PDP-11/03 BA11-N has
>three switches as well (restart (momentary), Halt, and Aux). I assume
>that these are connected in some way to the BDV11 internally? tracking
>the ribbon cable isn't easy on this chassis.
Not really connected to the BDV... the BDV has controls over BHALT
and the LTC... but so does the console. They both have to be
set correctly for the processor to be in RUN mode.
The Restart switch momentarily deasserts DCOK (if I remember correctly).
The halt switch enables/disables BHALT (again, IIRC), and the LTC switch
allows/disallows line frequency interrupts.
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com |
| Unix Support Engineering Group | (home): mbg!world.std.com |
| Compaq Computer Corporation | addresses need '@' in place of '!' |
| 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ |
| Nashua, NH 03062 | "pdp-11 programmer - some assembler |
| (603) 884 1055 | required." - mbg |
+--------------------------------+-------------------------------------+
Hello, all:
I just got a bunch of schematics for the main logic board and memory for
a Scorpion computer. Does anyone have any info on this machine?? I'm not
even sure that it was in production or not. It looks to be based on the 68k
processor.
I also got some schematics for the Corvus Concept and the Corvus hard
disk interface (from IMI?)
I'll post these shortly, but any info on the Scorpion is appreciated.
[ Rich Cini/WUGNET
[ ClubWin!/CW7
[ MCP Windows 95/Windows Networking
[ Collector of "classic" computers
[ http://highgate.comm.sfu.ca/~rcini/classiccmp/
[ http://highgate.comm.sfu.ca/~rcini/pdp11/
<---------------------------- reply separator
<>Here are the details: M8012-YA card with two ROMs labelled:
<>
<>Given the other stuff that was tossed out with this card I suspect either
<>an RL01 boot rom or an RX02 boot ROM ...
Ok, with the book infront of me...
First Qbus-11s boot at 173000,
the BDV-11 provides rom from 173000-->173776 (512 bytes),
the roms are larger than 512bytes,
Most boots are smaller than 512bytes!
So those roms contain,
Boot time diagnostic and one of the folowing:
RK05 (DKn)
RL01/2 (DLn)
RX01 (DXn)
RX02 (DYn)
MOPboot via (DUV11, DLV11-E, DLV11-F) (for 23-045E2/046E2 romset)
or user supplied rom with boot.
the board also supplies a halt/enable switch, Restart switch and BEVENT-L
disable. the leds are power OK and diagnostic error.
Handy board for Qbus 11 building where the cpu is LSI11(M7264),
LSI11/2(m7270) or 11/23(m8186). The later M8189 (11/23b) and 11/73 cards
have rom on board.
Allison
FWIW there are more than one kind of museum. There is a "Tech museum" kind
that has a bunch of pretty displays behind plexiglass and the "research"
kind. (And a whole bunch that are somewhere in the middle). If you have
privileges at a research museum you can work on and/or use parts of the
collection that are not available for "general" use. I would expect that a
good research computer museum would be a great place to visit.
--Chuck
On Sun, 21 Mar 1999 10:50:14 -0500, "Barry A. Watzman" <Watzman(a)ibm.net>
wrote:
>>You are never going to see a "new" IMSAI for $500.
One can wish, can't one???
>>In the first place, many of the parts that would be needed for a complete
>>system are no longer available.
Like what?? I don't have schematics for the IMSAI, but looking at the
Altair schemtaics, Jameco has many of the old parts except the 1702A EPROM
and the exact RAM (although the 5101 looks like a likely sub). The power
supply transformer may be available on the surplus market, or in new
production quantities from Signal.
>>In the second place, the original IMSAI was not UL approved (or even safe,
really)
>>and could probably not be sold today.
>>In the third place, the original IMSAI was not even close to meeting FCC
>>Class A much less B.
If the plan is to sell a complete, fully-functional, off-the-shelf unit
in CompUSA, then yes I agree UL/CSA approvals (which are expensive) are
necessary, as is meeting the FCC emissions regs. However, how many hobbyest
projects in Radio-Electronics or Popular Electronics have passed those
rigorous tests? I'd guess none. What standards to be met depends on where
this is being sold and in what quantities. Also, a redesign of the power
supply for common sense safety is not all that difficult. I believe that it
*is* possible to produce a slightly re-engineered "25th Anniversary" IMSAI
8080 for a reasonable price.
>>Finally, $500 would be cheap for a low-volume copy, regulatory issues
aside.
Like I said in my original post, I'd bet that it is possible to come
close to $500 (profits not included). The hardest part I'd bet is finding a
suitable replacement for the enclosure. Maybe $500 isn't the right price;
maybe $600 is. Maybe it's $800 with a profit figured in. I'd bet that it's
less than $1200, though.
If someone will send me a complete bill of materials for a basic IMSAI
8080, I can spend a few minutes pricing out the parts (assuming a 500 qty).
>>Do not be surprised when your unrealistic expectations are not realized.
Believe me, I won't be surprised. My pricing thesis was not an
"expectation" since I hadn't gone through the exercise of pricing out a BOM
to test for reasonableness. Maybe I'm all wet, but then again, maybe I'm
not. I don't know. I was merely stating what may be possible.
Here's my guidepost: the original Altair kit was what, $497. I figured
that any cost benefit from {current} lower prices on silicon and passives
would be offset by higher prices on harder-to-find parts such as the case,
bus connectors and RAM.
[ Rich Cini/WUGNET
[ ClubWin!/CW7
[ MCP Windows 95/Windows Networking
[ Collector of "classic" computers
[ http://highgate.comm.sfu.ca/~rcini/classiccmp/
[ http://highgate.comm.sfu.ca/~rcini/pdp11/
<---------------------------- reply separator
On Sun, 21 Mar 1999 17:27:06 -0500, "Mike" <dogas(a)leading.net> wrote:
>>Why not create a current design for a modern front panel system? ok,
retro
>>styling because I like the silk screening of the 8800b and the 8080 but
with
>>*some* modern accoutrements while still providing that front panel
>>experience.
I think that what Tom is thinking of doing -- a Pentium II-class
motherboard joined to an IMSAI front panel with either the S100 or a "new"
expansion bus.
[ Rich Cini/WUGNET
[ ClubWin!/CW7
[ MCP Windows 95/Windows Networking
[ Collector of "classic" computers
[ http://highgate.comm.sfu.ca/~rcini/classiccmp/
[ http://highgate.comm.sfu.ca/~rcini/pdp11/
<---------------------------- reply separator
You may want to check out the ALPHA 16. I used to service them and should
still have the docs. All of the ones I dealt with were core memory 8 and
16K IIRC.
Dan
-----Original Message-----
From: Chuck McManis <cmcmanis(a)mcmanis.com>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Monday, March 22, 1999 6:53 PM
Subject: Re: berman?
At 06:59 AM 3/22/99 -0600, Jay West wrote:
>Anyone know what happened to bermans diversified industries? Is their
>website just dead or....
>Jay West
They are still there, I went by to be sure. They are completely "clueless"
about the web so it may be a couple of days before they get their site back
up. (I'm going to see if I can sell them a FreeGate box :-)
Interesting stuff in this week's auction:
#113 - set of interactive UNIX docs from Sun
#109 M/2000 RISComputer (MIPS)
#108 TU81+ tape drive
#59 Qty 4 "ASR" Silent 700's (with cassette drives)
*very* grungy
#40 Various boards that look like HP boards one was
marked HP 13037-69023 and C-1635
#37 Empty HP21MX frame and another HP21xx frame (no
nameplate) HP Rk05 type disk (front loading pizza box)
#19 Computer Automation "Alpha-16" front panel and
on the pallet apparently the body of this machine.
#14 Two HP7970E 1600BPI 9-trk drives
#5 Very RARE Sun 75/GT "Graphics Tower" this was part
of the Evans & Sutherland joint cooperation program
with Sun. Few of these were sold (they cost 100K+)
There is also a DECStation 5000/125, a SPARCStation 1+,
and a couple of Sun Shoeboxes (external scsi drives)
on this pallet.
--Chuck
I guess what we need is a definite authoritative price list for classic
computers like the becket for baseball cards or the blue book for cars etc.
This could be a collective or individual effort.
Any takers?
Francois.
It's the Adam that is only an Adam if you have a colecovision to expand it
with.
-----Original Message-----
From: Sellam Ismail <dastar(a)ncal.verio.com>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Monday, March 22, 1999 5:46 PM
Subject: Re: Wanted. Coleco vision
>On Mon, 22 Mar 1999, TheDM wrote:
>
>> Well, I finally found a Coleco Adam 3. however, this is the version that
I
>> need a Colecovision game system to play with, anyone have one for sale or
>> trade?
>
>What's a Coleco Adam 3?
>
>Sellam Alternate e-mail:
dastar(a)siconic.com
>---------------------------------------------------------------------------
---
>Don't rub the lamp if you don't want the genie to come out.
>
> Coming in 1999: Vintage Computer Festival 3.0
> See http://www.vintage.org/vcf for details!
> [Last web site update: 02/15/99]
>
