test-drb

test-drb@ccmp.vtda.org

101090 discussions

by jonas＠otter.se

On Thu, 10 May 2012 10:40:08 -0400, Ethan Dicks <ethan.dicks at gmail.com> wrote: > On Wed, May 9, 2012 at 5:02 PM, Jonas Otter<jonas at otter.se> wrote: >> > On ?Wed, 9 May 2012 09:04:07 -0700, "Michael Holley"<swtpc6800 at comcast.net> >> > wrote: >>> >> >>> >> I was told the load from hard disk was page fault the swapped the desired >>> >> data back into memory. >>> >> >>> >> -----Original Message----- >>> >> From:cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org] >>> >> On Behalf Of Tom Uban >>> >> Sent: Wednesday, May 09, 2012 5:33 AM >>> >> >>> >> One note on the PDP-11/03 booting the VAX-11/780, the PDP-11/03 first >>> >> loads the microcode into the VAX-11/780, thereby defining the machine's >>> >> higher level of operating code, then a bootstrap to load from a particular >>> >> hard disk or tape is run. On most PDP-11s, the microcode is stored in >>> >> ROMs or is hard wired. >>> >> >> > VMS always loads a program by page faulting it into memory. That mechanism >> > would AFAIK not work for booting, because the whole paging software, disk >> > drivers etc would have to be loaded and initialized first. I don't remember >> > offhand what it says in the VMS internals book about booting, but I could >> > look it up. > I, too, would have to look up details, but from what I remember about the 11/730 > (which has an 8085 as a front-end processor, not a PDP-11, but AFAIK, the > general principles still apply), the FEP loads VMB.EXE from the console medium > (RX01 for the 11/780, TU58 for the 11/730) into VAX main memory then kicks the > processor into run mode. > > The 11/750 is a different beast - it has native boot ROMs and no FEP (there's > an A-D selector switch, and there are several common arrangements of boot > ROMs, including for third-party disk controllers) > > -ethan According to the VMS Internals book, SYSBOOT (secondary bootstrap, loaded after VMB) sets up the system page table. SYSBOOT loads EXE$INIT and transfers control to it. EXE$INIT then does all the work of setting up page tables, loading the paging subsystem and turning on memory management. So it appears that no paging in of anything can occur until at least EXE$INIT has done its work. /Jonas

13 years, 11 months

PDP-11/35 (And: It's good to be back)

by bqt＠softjar.se

On 2012-05-10 02.53, Seth Morabito<lists at loomcom.com> wrote: > Hi folks, > > First I'd just like to say it's good to be back. I think I first joined > Classiccmp in 1998-ish, and I've been on-again off-again as time and > life has permitted participation in the hobby. Following a very long > time spent off the list, it's really good to finally be back. I've > missed this place a lot. [...] Hi Seth. Long time no see indeed. Nice to hear you're getting some usable computers again. ;-) Johnny

13 years, 11 months

More photos from VCF East 8

by jonas＠otter.se

On Wed, 9 May 2012 09:04:07 -0700, "Michael Holley" <swtpc6800 at comcast.net> wrote: > I was told the load from hard disk was page fault the swapped the desired > data back into memory. > > Michael Holley > > -----Original Message----- > From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org] > On Behalf Of Tom Uban > Sent: Wednesday, May 09, 2012 5:33 AM > To: General Discussion: On-Topic and Off-Topic Posts > Subject: Re: More photos from VCF East 8 > > One note on the PDP-11/03 booting the VAX-11/780, the PDP-11/03 first loads > the microcode into the VAX-11/780, thereby defining the machine's higher > level of operating code, then a bootstrap to load from a particular hard > disk or tape is run. On most PDP-11s, the microcode is stored in ROMs or is > hard wired. > VMS always loads a program by page faulting it into memory. That mechanism would AFAIK not work for booting, because the whole paging software, disk drivers etc would have to be loaded and initialized first. I don't remember offhand what it says in the VMS internals book about booting, but I could look it up. /Jonas

13 years, 11 months

VCFeast, H960s, and module cleaning.

by mross666＠hotmail.com

First I'm popping my head above the parapet for the first time in a while; ancient computer ventures *have* been proceeding at the Corestore, but less so in the past due to pressures of other activities. Hopefully I'll be much more active again starting now or soon! I had a great time exhibiting the 'live restoration' of one of my pdp-15s at VCFeast; put some names to faces and had a good time all round. We got from a machine in bits which hadn't been powered on in 15 years, to an operational 11/05 front-end, and a -15 CPU which passed smoke-test and had a working console. We failed to make the most optimistic scenario of toggling in short programs due to a dodgy memory box power supply. Not bad for a few hours work. Next time I'll reserve more space, I won't arrive late, and I'll put up barriers and a 'do not feed the hacker' sign! Couple of questions occurred to me as a result of this exercise. If something is just a bit mucky from years of service/storage, I'll give it a good clean but otherwise keep it as original as possible, with a patina of age. But if something is really ratty, especially with evidence of corrosion, I like to refurbish it completely to as near as-new shiny condition as possible, in every part and detail. With that in mind: 1. I have a good number of ratty old H960s with flaking paint & rust, mostly just in the bases. My projected 'refurbish' technique would involve drilling out the rivets holding the verticals to the bases and tops, shot-blasting/wire-brushing/otherwise-abrading all the old paint and rust back to smooth bare metal, and repainting them to give shiny like-new H960s. Does anyone know the exact size and spec of the rivets that hold an H960 together? Does anyone have any relatively shiny near-new H960s spare/for sale? (I know someone who might, I'm talking to him already!) 2. From time to time I've seen discussion of cleaning techniques for circuit boards here, specifically DEC modules, mostly the M-series flip-chip stuff. Was there ever any final conclusion as to the best way to cosmetically clean them? I've seen accounts of washing them in (?soapy?) water, rinsing, and leaving them in sun to dry. Is that really safe? Thoughts on other cleaning techniques? 3. When cosmetically refurbishing/repainting power supplies - H7420 etc. - does anyone have any good and valid suggestions for reproducing the DEC lettering and legends printed on the power supply? Photograph it and make some kind of transfer or sticker perhaps? How would one go about that? Thanks folks Mikehttp://www.corestore.org

13 years, 11 months

FFS: HP2932a dot matrix printheads

by dgriffi＠cs.csubak.edu

I have three printheads for the HP 2932a dot matrix printer. They're free for shipping. -- David Griffith dgriffi at cs.csubak.edu A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?

13 years, 12 months

Dilog DQ614 Controller and RT11..

by tshoppa＠wmata.com

> I have some cards here I want to build a PDP11 from, at the current > that's something around an KDF11-A CPU (22bit). > Currently I have problems with some Dilog Controller, this is an DQ614 > that emulates 4 RL02 Drivers out of two 20MB MFM disks (Microcience HH725). > I can install and successfully boot RT11SB.SYS and RT11FB.SYS but not > RT11XM oder RT11XB. XXDP2.5 is working fine. > Nowhere in the Dilog Documentation is something mentioned about 18 or 16 > bit addressing limitations of that controller, the pinout clearly has 22 > bits. > (http://www.bitsavers.org/pdf/dilog/) > I have an RQDX3 with 2 TEAC FD55-GFR-184 Floppies on this system too, I > can boot RT11XM oder RT11XB (same files!) from there fine... > If I try that from DL0 or DL1 I'll always get a trap to the ODT (0002), > regardless if I use the Dilogs own Bootloader or that from an 11/53 or an > 11/73 CPU. Which version RT11XM? If you boot RT11XM from the RQDX3, can you read/write (as a data disk) from DQ614 DL: ? Tim.

13 years, 12 months

More stuff - Goldendale Wa.

by jimpdavis＠gorge.net

I forgot to mention a Radio shack/ tandy model 4 and color 2, TI 99/4A in box, piles of old hard and floppy drives, motorola 68K multibus? 520/1040 3 atari ST parts machines... Thanks, Jim.

13 years, 12 months

TI-99/4A in PA

by fraveydank＠gmail.com

http://philadelphia.craigslist.org/sys/3002690385.html Unopened, $50. Near Philadelphia (Montgomery County, PA). Just in case anyone wants it (I don't). - Dave

13 years, 12 months

WTD: 16-bit SCSI PC Card

by feldman.r＠comcast.net

Does anyone have a spare 16-bit SCSI PC C ard (PCMCIA) adapter and dongle they would be willing to part with? I have an Adaptec 1460D card, but it has an 8-bit SCSI data path, and I need a card with a 16-bit data path to use with an old Nikon slide scanner that I have. Please reply directly to me at feldman.r at comcast.net . Thanks, Bob

13 years, 12 months

EPROM and EEPROM Programmers

by robert.jarratt＠ntlworld.com

I have some back-burner projects that will one day need me to start burning EPROMs and EEPROMs. I can't justify the cost of the big professional things costing hundreds of pounds. At the moment I know I will need to program a 27C1024 EPROM (40 pin DIP) and a 28C256 EEPROM (28 pin DIP), but it would be nice to have something that can handle a reasonable variety of devices. I believe the Willem programmer may be suitable, it is certainly affordable, would that fit the bill? It seems to come from Thailand, although there seem to be all sorts of sources on ebay, so I am not sure what the genuine source really is. I am also not averse to buying secondhand, ebay or otherwise, if I can get something that is going to be more generally useful than the Willem. Any advice welcome. Thanks Rob

13 years, 12 months

discrete transistor computer

by rickb＠bensene.com

Tim wrote: > In the late 60's and 70's, radio shack sold some little one-bit-flip-flop boards > with lamps. Each flip flop was a little square of circuit board. > > There may have been other logic functions available one-to-a-board. I'm > pretty sure they were discrete transistors for the most part (even the round > package SSI Motorola RTL typically had two gates or flip flops per package.) > > You could buy multiples and configure them as a counter, and I'm pretty sure > they could be wired as a shift register too. > > May have been "Archerkit" brand name. Or "Pbox" brand name although > what I remember were not Pbox's but circuit boards. > > I tried using websearches to find pictures or docs, but the Googles, they do > nothing! > I built something like this when I was probably something like 12 or 13 years old. I was purchased at Radio Shack as a kit. It was a four bit binary counter, with incandescent lights as on the Q outputs, (though discrete transistor drivers), and a photoresistive cell or pushbutton switch as the trigger. With the photoresistor as the trigger, when you waved your hand in front of the photocell, it would increment the counter, which was pretty cool. I distinctly remember the RTL IC's made by Motorola in the black plastic "blob" packages. I have vague recollection of the project being a mother board that had four small circuit boards that had the flip flop chip, transistor driver, and lamp (perhaps these were the boards that Tim mentioned). The mother board had a photocell, a toggle switch, and a momentary action switch with de-bouncing circuitry. You could trigger the counter with the photocell, or the momentary action switch. I think the thing ran off a 9V battery if I remember correctly. The photocell didn't have very fast response time, but I do remember putting it in front of a fan in a dark room with a flashlight shining through the fan blades, and made the counter go pretty fast. I think that I eventually damaged the chips by trying to make the thing count BCD rather than binary by adding some gating. That was the end of it. It was fun building and tinkering with, and educational. It was my first exposure to integrated circuits.

13 years, 12 months

More photos from VCF East 8

by billdeg＠degnanco.com

More photos from VCF East 8 http://vintagecomputer.net/browse_thread.cfm?id=466 Here is a link to the session materials Kelly L and I used for our workshop, Introduction to Vintage Software Restoration. http://vintagecomputer.net/browse_thread.cfm?id=467

13 years, 12 months

Dilog DQ614 Controller and RT11..

by holm＠freibergnet.de

Hi, I have some cards here I want to build a PDP11 from, at the current that's something around an KDF11-A CPU (22bit). Currently I have problems with some Dilog Controller, this is an DQ614 that emulates 4 RL02 Drivers out of two 20MB MFM disks (Microcience HH725). I can install and successfully boot RT11SB.SYS and RT11FB.SYS but not RT11XM oder RT11XB. XXDP2.5 is working fine. Nowhere in the Dilog Documentation is something mentioned about 18 or 16 bit addressing limitations of that controller, the pinout clearly has 22 bits. (http://www.bitsavers.org/pdf/dilog/) I have an RQDX3 with 2 TEAC FD55-GFR-184 Floppies on this system too, I can boot RT11XM oder RT11XB (same files!) from there fine... If I try that from DL0 or DL1 I'll always get a trap to the ODT (0002), regardless if I use the Dilogs own Bootloader or that from an 11/53 or an 11/73 CPU. Does someone here know of that problem? Regards, Holm -- Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe, Freiberger Stra?e 42, 09600 Obersch?na, USt-Id: DE253710583 www.tsht.de, info at tsht.de, Fax +49 3731 74200, Mobil: 0172 8790 741

13 years, 12 months

cctech Digest, Vol 105, Issue 10

by mross666＠hotmail.com

> Message: 9 > Date: Wed, 9 May 2012 01:08:08 -0400 > From: Ethan Dicks <ethan.dicks at gmail.com> > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Subject: Re: More photos from VCF East 8 > Message-ID: > <CAALmimkv-r06X-W2GAB9VS1_NLpiDB-kACijtzOB3JS7tC6NYQ at mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > On Tue, May 8, 2012 at 11:27 PM, B Degnan <billdeg at degnanco.com> wrote: > > More photos from VCF East 8 > > http://vintagecomputer.net/browse_thread.cfm?id=466 > > You wrote: > > "Mike Ross' exhibit consisted of a PDP 11/05 used to interface with > a PDP 15, in two racks. He demonstrated restoration techniques for > attendees. I am not sure exactly what you call this console, there is > no "PDP 15" on the panel, but I assume it's some kind of I/O device > that complements the (not pictured) PDP 11/05 used to presumably > bootstrap this thing." > > That _is_ the PDP-15 front panel - if you look, there are 18 data bits. > The PDP-15 CPU was the large spread of M-series cards on the > backplane above this front panel. Its memory was in a black box below > (and not there for much of the weekend). The PDP-11/05 is self-contained > and does the same job as the PDP-11/03 in a VAX-11/780 or the PDP-11 > in various models of PDP-10. In each case, the PDP-11 boots from its > own ROMs to start up enough code to feed the larger processor. In the > case of the VAX-11/780, the PDP-11/03 has one RX01 floppy drive. I > don't know what this PDP-11 uses, but there must be some local mass > storage that's part of the scheme. Yes and no. On a pdp-15, the 11/05 is more a front-end than a console/bootstrap processor; it doesn't need to load microcode or any such thing. Any pdp-15 can start up from paper tape (there's usually a reader/punch immediately above the -15 console, was not installed at VCF) - heck, there's even a dedicated 'Read-in' switch on the console which initiates that boot. On the -15 I exhibited, the mass storage *did* rely on the -11; an RK11 talked to two RK05s (also not taken to VCF to make system easier to handle), and a Unichannel 15-to-Unibus interface gives the -15 direct access to the RK subsystem in 18-bit mode. On my other pdp-15, mass storage is all native; it has an RP15 (disk) and TC59 (tape) controller. That system had an 11/40 front-end, but it was only used for communications devices. It's a much bigger restoration project as I only got hold of it after it had been deinstalled; quite a few cables cut, and every single -11 compatible component (the 11/40, power supplies etc) had been robbed by the site engineer for spares. > Many I/O devices of the day did have blinkenlights indicators (usually installed > at the top of the rack), but not this many control switches. The RP15, TC59, and FP15 all have a good crop of blinkenlights. What I really want to get hold of is a TC15 DECtape control! > Message: 26 > Date: Wed, 9 May 2012 06:10:39 -0700 (PDT) > From: Gene Buckle <geneb at deltasoft.com> > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Subject: Re: VCF East pictures > Message-ID: > <alpine.LFD.2.00.1205090608490.11705 at grumble.deltasoft.com> > Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed > > On Tue, 8 May 2012, Mike Loewen wrote: > > > > > http://sturgeon.css.psu.edu/~mloewen/Oldtech/VCF-East2012/ > > That PDP-15 console is just a thing of beauty. *sighs* Would it be bad form to admit at this point that I have two of them? :-D Mike

13 years, 12 months

Need a PDP-8/I Bootable DECtape

by michael.99.thompson＠gmail.com

> Those new fangled IC's just aren't reliable. I only needed to repair > 14 processor board plus one power supply board in my straight 8. > Do you have any idea why so many? I didn't have to repair that many > in my 8/I though didn't record the actual count. The system sat in an uncontrolled environment for many years. There was lots of corrosion on the boards. Some of the leads on the ICs were so rusted that you could pry them off the board. We replaced LOTS of 7474 and 7400 ICs, and quite a few 7410, 7420, and 7440 ICs. There were all kinds of interesting failure modes. > The only OS I know that will run in 4k is disk monitor system (it does > run on dectape only systems despite the name). I saw that, read the manual, and couldn't believe that a disk operating system would run with just a DECtape. > The paper tape images needed to build it are here. > http://www.pdp8online.com/ftp/software/paper_tapes/ Got them now. > See in the readme DEC_D8* files. Start with SBAF then use the load > and save command for the other programs as desired. ?I tested with an > emulator that the DF32 PIP works with DECtape. We will give it a try if we successfully format a tape. > I recently built it for my DF32 so if you need more help I can provide. I > can build a DECtape using an emulator and my PDP-8 but I can't test it > since I don't have a TD controller. The TC01 controller doesn't have any ICs, so it just worked. Thanks for the help. -- Michael Thompson

13 years, 12 months

VCF-East?

by david＠classiccomputing.com

>> VCF-East is this weekend, and it's shaping up to be QUITE an event! >> Who's going? > > I'm going *and* exhibiting ! It will be the best VCF ever ! There will be > all those great lecturers, workshops, exhibits, etc ! And I get to learn how > to troubleshoot and repair my C64 ! Super great weekend ahead ! Grumble, grumble, snarl . . . get off of my lawn! ; ) Best, David Greelish, Computer Historian President, Atlanta Historical Computing Society - Author, "The Complete Historically Brewed" - "Classic Computing Show" podcast - "Stan Veit's History of the Personal Computer" audiobook podcast - "Retro Computing Roundtable" podcast - "Not Another Apple Podcast" ClassicComputing.com | atlhcs.org

13 years, 12 months

Pertec hard disk

by cc＠informatik.uni-stuttgart.de

Hi, I'm looking for information (cabling, jumper settings) for a Pertec 8" SMD drive, model DX332 (full model number: DX332-2-D-01). Christian

13 years, 12 months

Tek tube

by wdonzelli＠gmail.com

Can someone please look up in your Tek manuals: Is the tube in the 4010 a number 154-0624-11? Need to know today? -- Will

13 years, 12 months

WHY? (Was: What's the point of USB keyboards+mice)

by feldman.r＠comcast.net

On 6 May 2012 at 14:22, Fred Cisin wrote: > WHY is the keyboard (and mouse) connector on the BACK? > WHY was the power switch at the back? ?(I loved the PS/2 bellcrank > linkage to put a power switch at the front with a long rod to the > back!) For my first PC/XT clone computer, I built my own case. I put the?floppies and power switch on the front and all of the ports on the side (the expansion cards ran from side-to side rather than front-to-back). Much easier to get to the cords that way and there were no wir es sticking out the front. Bob

13 years, 12 months

A little humor from my school

by fraveydank＠gmail.com

Some of you will find this amusing, anyway. This is a verbatim quote >from our *current* graduate CS handbook: The department?s computing facilities include Sun and Silicon Graphics workstations, SGI Crimson and SPARC servers, and high performance graphics workstations (SGI Indigo2, Onyx Reality Engine2). The Office of Information Technology has over 400 workstations for general student use and several high-end machines including a Silicon Graphics Challenge XL 20 processor system. UMBC?s Imaging Research Center also provides high-end graphics support including production quality input/output devices and production software (Wavefront, Softimage, and Alias). While these are cool machines, I did see some of them at VCF East this past weekend. I'm pretty sure the school doesn't have them anymore. I guess weeding out old info isn't a top priority. :-) - Dave

13 years, 12 months

WTB: Signetics 2650 Evaluation board PC1001

by pinball＠telus.net

Does anyone have one of these animals? I am trying to reproduce an old video game that was based on it and figured it might be easier with the Eval. board. Thanks, John Robertson Vancouver, BC, Canada

13 years, 12 months

Module recognition time! Again.

by peter＠vanpeborgh.eu

Guys, Does anyone recognise this transistor module, presumably from a 60s computer? Many thanks, peter http://www.ebay.co.uk/itm/110840435635?ssPageName=STRK:MEWNX:IT&_trksid=p39… || | | | | | | | | Peter Van Peborgh 62 St Mary's Rise Writhlington Radstock Somerset BA3 3PD UK 01761 439 234 || | | | | | | | |

13 years, 12 months

SCO Unix manuals available

by kelly＠catcorner.org

I have copies of the SCO manauls available. About 40 pounds worth of OS and development system stuff. This is all pre-OpenServer stuff. It is SCO UNIX 3.2v4.0 They are located in Wantage NJ. Come and get them or pay me to ship them. If anyone is iterested let me know, or they go the the recyclers. Kelly

13 years, 12 months

Need a PDP-8/I Bootable DECtape

by michael.99.thompson＠gmail.com

The RICM has the processor of their PDP-8/I functional after replacing or repairing 38 Flipchip modules and the core stack. We have lots of Dectapes that originally held data from a PDP-11, but nothing that is bootable on the 8/I. We tried the TC01 bootstrap with one of the PDP-11 tapes. It moves the tape to the first block and then gets a TIM (Timing Error), so the TC01 and the TU55 is at least partially alive. Can anyone supply a Dectape that would be bootable on this 4k machine, or tell us the procedure for making a bootable Dectape? http://www.ricomputermuseum.org/Home/equipment/pdp-8-i -- Michael Thompson

13 years, 12 months

[NO REWARD WHATSOEVER] Looking for IBM, ANSI, and Sun doc

by microcode＠zoho.com

I figured I should ask now while everybody is in a helpful mood :-) Does anybody have scans of any or all of the following? IBM 01. MVS/ESA Component Diagnosis and Logic: EXCP Processor (LY28-1477) 02. LY28-1487 03. LY28-1488 04. LC28-1166-5 05. SA22-7085-0 System/370 Extended Architecture Principles of Operation 06. SA22-7085-1 System/370 Extended Architecture Principles of Operation 07. SA22-7200 System/370 Enterprise Systems Architecture Principles of Operation ANSI American National Standards Institute ANSI X3. 74-1987 (PL/I Subset G) Sun UltraSPARC-IIIi Programmer's Reference Manual which is referenced here: http://hg.genunix.org/onnv-gate.hg/file/48f2dbca79a2/usr/src/lib/libcpc/spa… and here: http://download.oracle.com/docs/cd/E19683-01/816-1681/6m83631lh/index.html although without any pointers or links. I have the U/S IIIi User's Manual but this does not seem to be the one the above doc is referencing. No reward except my gratitude and promise to search my archives for my pals in need! However Al is making it pretty tough to have anything unique! Many thanks to Al for running bitsavers and everybody for contributing. I hope archive.org sticks around long enough for us to scrounge whatever is left on Sun but it's getting thin. I haven't been able to get to the open firmware site on playground.sun.com and the official site is running a business on openfirmware and isn't exactly giving out doc. So much for open. Thank you.

13 years, 12 months

Jump to page:

2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

test-drb