Thanks Al, for giving me a retro-headache, that chip's
architecture is even worse than I remembered :-)
It's truly a terrible architecture.
The subroutine call mechanism is a trivial software convention,
you could do it on any machine that had one unit of storage to
dedicate. Only 32 one-deep calls are allowed; 32 is an 8x300
limitation.
The trick is that CALL and RETURN are macros. Here's how it's
done, example trivial code fragment:
0100: CALL subr / This jump subroutine...
0102: ... / ...returns here,
0103:
...
0200: CALL subr / and this call...
0202: ... / ...returns here.
subr: code here
...
RETURN
One 8x300 register is set aside for the return linkage mechanism,
let's call this RETN.
The macroassembler does the work. A local (to the assembler)
variable, let's call it R, increments with every CALL macro
expansion, arbitrarily from the top of the souce file to
the bottom. At the same time, a jump table, call it JUMPS,
is constructed where the Rth entry is [pc + 2], that is, the
address to return to after the call. (2 instructions are needed
to do the CALL.)
CALL expands to:
xmit R, RETN / store R in register RETN
jump subr
RETURN expands simply to:
XEC RETN, JUMPS / execute JUMPS[RETN]
I'm certain I have the syntax wrong, no matter.
The jump table called JUMPS looks like:
JUMPS: jump 0102 / first call + 2
jump 0202 / second call + 2
... / etc
It would be 'interesting' to cobble up a mechanism capable
of recursion, but likely it would be larger than many
subroutines. It could certainly be done though, and worse things
have been shipped.
Hi
I'm not sure if I understand your question. You simply
change the time constants to be in the range you are looking
for. If the original used a 10K and it was 0.1 seconds,
using a 100K will make it 1.0 seconds. The capacitance
values scale similarly.
Do remember to remodel things so that the equation
is all integrations and no differentiations. Doing
integrators is preferred for these problems.
I don't think you change the gains unless you want
different responses. You only change the time constants
so that you can watch the response. Of course, each
step is linear so that you and divide at the input of a
stage and the multiply the output if there is a compliance
issue. Otherwise, just control the size of your stimulus.
Dwight
>From: "ahmed abu aqlain" <adomsr(a)yahoo.com>
>
>I'm Ahmed and I have the following analog computer
>Comdyna GP-6
>and I want to implement a high order control transfer function, but I do not
know how to rescale of the gain coeffecients fro the high order TFs.
>
>so, we send you this letter to help us in this point if it possible.
>
>Thank you very much
> AHMED
>
>
>---------------------------------
>Do you Yahoo!?
> The all-new My Yahoo! ? What will yours do?
>
> From: "Joe R." <rigdonj(a)cfl.rr.com>
>
> Anybody know anything about these?
The Mercury that I know does high end, custom floating-point
semi-super-computers.
They are still in business at http://www.mc.com/.
Ken
Sellam:
This is an absolutely awesome site! Do any of the other major
universities known for their science/technology have this -- like Stanford,
CalTech or CMU?
Rich
==========================
Richard A. Cini, Jr.
First Vice President
Congress Financial Corporation
1133 Avenue of the Americas
30th Floor
New York, NY 10036
(212) 545-4402
(212) 840-6259 (facsimile)
-----Original Message-----
From: cctalk-bounces(a)classiccmp.org
[mailto:cctalk-bounces@classiccmp.org]On Behalf Of Vintage Computer
Festival
Sent: Wednesday, December 01, 2004 4:16 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: OT: good CS textbooks for a DIYer
On Wed, 1 Dec 2004, Richard A. Cini wrote:
> I'm looking for recommendations on CS textbooks for myself...I'm
> embarking on sort of a DIY CS degree :-)
>
> Anyway, if anyone could recommend decent first-year and/or
> second-year books on algorithyms and data structures in C/C++, I would
> appreciate it.
MIT OpenCourseware
http://ocw.mit.edu/OcwWeb/
Free university courses!
--
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
]
Would anyone like to backport the hp300 BSD port from 4.3BSD-Reno and
more modern systems to 4.3BSD-Quasijarus? If anyone wants to do it,
there's the hardware... No, not me, I have WAY too much on my plate
to even consider it.
MS
I have a pair and I'm finally getting around to playing with them.
The last time I looked at them, one was missing RAM and had some fans had
been removed the other had some cards moved around and generated a config
error.
0016600 Adapter error -this is the SCSI controller
in view configuration it shows slot one as having a conflict and lists the
built-in features.
Moving the card to slot2 made no difference.
The 2 SCSI cards in the other machine are not the same.
One worked but it seemed to hang when configuring SCSI devices.
The other cards does not have the right connectors.
--
Collector of vintage computers http://www.ncf.ca/~ba600
Machines to trade http://www.ncf.ca/~ba600/trade.html
Open Source Weekend http://www.osw.ca
Hello,
The company I work for is considering disposing of about
10 to 15 HP 9000/300 series workstations. I need to
actually gather them up between the 3 buildings and count
them.
Most are model 310. Most have SRM cards and extra memory.
I have no working drives available (see previous
submissions). We do have a number of keyboards and
monitors.
Here's the deal, Winner take all, Winner picks up in
Lexington KY. No shipping.
Good news is that they are free and there is not an
immediate need to move them.
Let me know if there's any interest and I will do an
inventory.
Thanks
Max
Nathan Schepers <nschepers(a)govital.net> wrote:
> Firstly, I'm brand new to the list and haven't spent much time lurking,=20
> so I hope my post is welcome for what it is. :)
Welcome to the club!
> I have in my posession three VAXStation 2000's and a VT220/LK201 (?)=20
> combination.
Nice.
> I used to have some big DEC monitors and the monstrous cables that come=20
> with them (mouse, keyboard, display all in one cable), but they've=20
> disappeared in the course of several years (and moves!).
Damn, that's too bad, they are great monitors. But you can use a serial
terminal like your VT220 as well. You can either connect a terminal as
the "alternative diagnostic console" to serial port 3 (traditionally called
the printer port) with a BCC08 cable (trivial to make yourself), or if
you want to be more fancy, you can permanently convert a VAXstation 2000
into a MicroVAX 2000 by changing a jumper inside (and removing the color
video option if there is one), in which case it will have a serial console
on port 0. Ports 0 and 1 are more difficult to connect to when you don't
have the official DEC423 converter box that went with MV2000 systems, but
not impossible if you are willing to make the (very hacky and non-standard)
cable yourself. If you use the alternative diagnostic console, you can't
unplug the console cable or it will halt (breaks cause halt with the alt
diag console), but if you get the console on port 0, breaks and unplugged
cables are no problem and you can run headless.
The connector pinouts and lots of other juicy technical info (enough to
write your own OS should you so desire) are in the MV/VS2000 Technical
Manual, EK-VTTAA-TM, available on Manx (giant scanned PDF unfortunately).
> I'm planning on reviving my retrocomputing hobby, and want to start by=20
> setting up the VAXen (is VAXen the proper plural?)
Yup, it is.
> Does the list have any suggestions for
> 1 ) The setup of these machines
See above about the console. Your OS choices are quite diverse. There
are VMS and Ultrix, and if you are willing to make some DEC-disapproved
hardware modifications (specifically, hook up a SCSI disk, then buy 4
27512 EPROMs at your local Fry's and program them with a modified version
of KA410 firmware that has SCSI tape boot code replaced with SCSI disk
boot code), you'll be able to run 4.3BSD-Quasijarus as well pretty soon
(as soon as I write the machine-independent SCSI code). If you want to
run NetBSD, OpenBSD or Linux, someone else would have to tell you about
those since I do not and will not touch those OSes. Or write your own
OS! This is one of the few machines of that era for which DEC published
a real technical manual.
I hope this helps,
MS
I picked up a fancy Smith Corona Ultrasonic 350 Messenger electronic
typewriter a few days ago. It has a DB-9F connector on them back. I'm
hoping that it's a RS-232 port so that I can use it for a serial console.
Does anyone know anything about these or the pinout for it?
Joe
>From my memories from the eighties.
The HP64000 crate can be filled with an ICE for a target CPU
and (with the appropriate software) you can do real-time
emulation. With the addition of the logic analyser board
(and again some system software) you can combine the software
emulation with hardware signal tracing. For example: define
an event to occur (start trace etc) when the hardware signals
have a certain state. Also, on the screen of the HP64000 you
can see timing diagrams of al the signals.
Neat stuff if you must do hardware debugging of the target.
If the hardware is OK, the analyser is seldom needed.
As said, from memory, 20 years ago ...
- Henk.
> -----Original Message-----
> From: cctalk-bounces(a)classiccmp.org
> [mailto:cctalk-bounces@classiccmp.org]On Behalf Of Dave Brown
> Sent: vrijdag 3 december 2004 11:11
> To: General Discussion: On-Topic and Off-Topic Posts
> Subject: HP 64000
>
>
> This is at the other end of the country from me (well, almost) but-
> what is the 'logic analyser' that's referred to? A plugin add-on of
> some sort? And can the combo be used for general purpose logic
> analysis?
>
> http://www.trademe.co.nz/structure/0124-0126-/auction-19286316.htm
>
> Tks for any info - don't know this system at all.
> Dave Brown,
> Christchurch, NZ
>
>
>
>
> --
> No virus found in this outgoing message.
> Checked by AVG Anti-Virus.
> Version: 7.0.289 / Virus Database: 265.4.4 - Release Date: 30/11/2004
>
The drawback of using the RESET instruction 000005 is noticed
when you have RX01 or RX02 drives connected to your system.
The INIT signal on the UNIBUS, asserted by the execution of
the RESET instruction causes all peripherals attached to reset.
For an RL01/RL02 drive you can probably see a lamp flash on the
front of those drives, but the RX floppy drives "clunk" with
their heads on INIT.
>From experience, running this little blinkenlight program on
an 11/35 is not fun for long, unless you are deaf because the
sound of engaging/disengaging the RX heads is *not* fun.
Sorry that you had to wait a little longer until Guy sent you
that program. I have it too, but could not find it ....
- Henk, PA8PDP.
> -----Original Message-----
> From: cctalk-bounces(a)classiccmp.org
> [mailto:cctalk-bounces@classiccmp.org]On Behalf Of Ashley Carder
> Sent: donderdag 2 december 2004 19:33
> To: General Discussion: On-Topic and Off-Topic Posts
> Subject: Re: Blinking Light program for PDP-11
>
>
> >Tom Uban wrote:
> >
> > Ashley,
> > Did you get a response on your question? One point
> > to keep in mind is that the various processor types
> > behave slightly differently. The typical method used
> > to do the "Cylon" lamp effect was to use the console
> > switch/display register (777570). A pseudo code program
> > would be something like this (translation left as an
> > exercise for you:-):
> >
> > Write '1' to console display register.
> > Lamp Loop:
> > Load spin count into register 2.
> > Spin Loop:
> > Decrement register 2.
> > Branch if non-zero to Spin Loop.
> >
> > Rotate the console display register value left.
> > Branch to Lamp Loop.
> >
> > This code will continually rotate one lamp from right to
> > left across the display. A more complex version would switch
> > directions when the lamp hits either end.
> >
> > Now for the problem. Only some processors (45, 70, perhaps
> > others, but I don't think the 35 or 40) support display of
> > the console switch/display register.
> >
> > There may be some other more generic method that works on
> > all processors, but I'm not sure what it might be...
>
>
> Hi Tom,
>
> I got a little "single rotating bit" program, coutesy of Guy
> Sotomayor,
> who's been a *BIG* help to me. I used this little program to do some
> basic testing on my PDP-11/40. It continually rotates one
> lamp across
> the display. This program was loaded as follows:
>
> Load address 001000
> Deposit 005000
> Deposit 005200
> Deposit 006100
> Deposit 000005
> Deposit 000775
> Load address 001000 and press Start.
> You should see a bit rotate around on the data LEDs.
>
> If anyone has any more interesting programs that can be toggled in
> for "blinking light" effects, I'd be interested in trying them out.
>
> After toggling in a couple of these types of things with the front
> panel last night, I decided to move on to bigger things. I hooked up
> an RL02 and was able to successfully boot RT11 v5.3, XXDP 2.5,
> and my Wofford Witch RSTS/E v7 system.
>
> Life is good!!!
>
> Ashley
>
>
>Yes. The problem with SSNs is that they are publicly accessible in
>far too many places. And you're asked for them in lots of places --
>like doctor's offices -- where you get very strange looks when you say
>NO. And way too many companies use them for ID numbers. And many
>states put them on driver's licenses.
>
>The problem is that all of this is legal -- it shoudn't be.
Here in NJ, the Emergency Service records are all handled via SSN as a
person's ID number.
So every EMS class I take, I have to put down my name, and my SSN on a
sheet of paper that sits at the front of the class... open to anyone who
is in the class, or anyone at any of the schools that handles the
paperwork (or anyone that sees the paperwork). If I fail to put down my
SSN, the course won't go down on my state records, which means I'll be
shafted out of class credits needed for various recerts.
Often these same sign in sheets ask for phone number and address as well
(I now put down the # and addy of my department rather than my own, but
most people put down their own). Some even ask for DL #!!! (I never put
that down except on classes that involve driving)
And I'm still convinced that the time I had my ID stolen was from one of
these classes. I use a combination of my name for my EMS records that I
don't use for ANYTHING else... and the time I had someone take out a
credit card in my name with my SSN, they used that particular combination
of my name. Of course, I'll never know for sure, because the local police
felt it was too low priority to bother investigating. I pushed them for 6
months on it before I gave up. (meanwhile, the bank told me they had a
2nd address and phone number on the application, but that they couldn't
give it to me, but they COULD give it to a police department... so really
all the cops had to do was make one lousy phone call!)
The state started a new ID system a few years back, but no one (including
the state itself) has changed over to it for general use (partly because
the ID is only for fire fighters, and they make up only one portion of
the EMS personelle... someone that just rides an ambulance has no desire
to take a fire fighter class so they can be issued an FFID). I keep
hoping the state will expand the FFIDs to a generic EMS-ID, and change
over to that for everything... it irks me each time I have to put my SSN
down on the sign in sheets.
-chris
<http://www.mythtech.net>
Anybody know anything about these? They look very modern and very high
tech. Most of the units are in grey aluminium boxs about 12" wide, 10" and
a couple of feet long. They have quick disconnect fluid couplings on them.
I opened one of the boxs and they have some regular looking boards in them
and some boards that are encased in thin aluminium boxs. Both the boards
and the enclosed boards have two small fluid quick disconnects on them too.
One of the encased ones was open and the card inside has two Intel i860XR
ICs on them along with a bunch of LSI brand ICs. One of the other boards
has soem HUGE ICs on it. They're almost 2 1/2" square and have Mercury
Computer Systems marked on them. ALL the ICs in these are heavily gold
plated and very expensive looking. I think the part number on the one
large box that I opened was Z1117. All the other boxs had different numbers.
Joe
OK, time for me to speak up. This thread is going in the totally wrong
direction. Why is everyone talking about silly stupid shit like SSNs?
Why is no one organising a posse to level the Bastille prison with the
ground and free our ClassicCmp comrade so he can once again work with us
on Classic Computers? Jeffrey Worley was and is a great guy, a real hero
in my book. OK, he killed his dad, so what. If Jeffrey killed him, it
was most certainly for just cause and the guy deserved to die. He was
most probably being a dictator in the house and tormenting Jeffrey (by
interfering with his ClassicCmp work, by telling him to get a Weendoze
job, or somesuch); and he was rightfully overthrown and executed for his
crimes by the oppressed citizenry.
MS
For yucks, I asked for a quote on some schematics from "3prime-solutions.com"
that were listed on their web site (11/84 and HSC50 schems..)
MP-01426-00......USD$2805
MP-01955-01......USD$1356
MP-02011-01......USD$1617
Do you have a suggestion as to the best
program / image format to use?
--
I use Eric Smith's rfloppy program under Linux
dmklib.brouhaha.com
If you get a chance, I'd like to scan a copy of the
manual to add to my archive on the machine.
>
I can try to make disk images for you.
--
thanks! I dumped the eproms a while ago. One of them is labeled
"MFM 10 sec" which should be a pretty good clue as to their format
One of the dumps starts out:
Copyright (C) 1982
Milwaukee Computers, Inc.
16235 Ryerson Rd.
New Berlin, WI 53151
414-784-2312
Ryerson is in an industrial park in New Berlin, which is a
western suburb of Milwaukee.
Hi,
Does anyone have a schematic for an M7090 (11/44 console card)
or know the pin out of the 20 pin header for the console cable?
I searched and could not find anything.
I don't have a console cable for my 11/44 and I'm sick of coding in TI
DSP assembler and need a pdp 11 fix.
I have all the parts to make a hack cable but don't know the pinout.
I suppose I should read the 11/44 manual :-) where is the console
baud rate set? (ok, ok, I'll go read the manual).
-brad
Does anyone know anything about
the company, or the box?
--
I have one as well. What version of UCSD pascal is the manual for?
I've been trying to find a boot floppy for mine for a while now.
I remember Milwaukee Computers demoing the machine at a computer
club meeting of the Wisconsin Computer Society in the late 70's..
Hi All,
I have in my possession a machine from Milwaukee Computers Inc. It is
part of the MC-1000 series, specifically it is a model MC-1200. In the
wood sided enclosure there is a 6502 single board computer and a pair of
5-1/4 floppy drives. The silkscreen on the board has the company name
and 1982. The only documentation I have, is the USCD Pascal Users Manual
with the Milwaukee Computers name on it. Does anyone know anything about
the company, or the box?
Jon
This brings back fond memories of a similar program for the Altair, called "Kill the bit".
It might have been the first working program I tried on my Altair (certainly the first "game").
It is about 20-30 instructions that can be keyed in manually.
The code is in one of the Altair newsletters.
Rob
I seem to recall seeing a little program that
can be toggled into a PDP-11 (35/40/45/etc) that
will create a "rolling lights" pattern on the
front panel console, where the lights roll to the
right and left, off and on. Can anyone here on
the list point me to that program? I know that I
saw it somewhere on the internet. I'd like to
toggle that program in on my system.
On another note, I got my ASR-33 working, connected
online via 20mA DZ11 connection to my 11/34. I had
the send/recv wires crossed. It works perfectly now.
Ashley
