test-drb November 2007

test-drb@ccmp.vtda.org

229 participants
508 discussions

by hoelscher-kirchbrak＠freenet.de

Hi, I haven't got ULTRIX/VAX V3.0C, but: V2.0 V3.1 (disk image only) V4.2 V4.4 V4.5 I'd like to have the missing versions, too. More ULTRIX-Manuals would be VERY interesting as well. (I scanned the ones at bitsavers.com) What type of VAX do you want to run ULTRIX on? Regards, Ulli

15 years, 9 months

8-bit ISA ethernet cards

by pat＠computer-refuge.org

A few weeks ago, some people in here were talking about putting network cards in IBM PCs or XTs or something... As it happens, I ran across a box of 3com 3c503 network cards (AUI and 10BaseT ports, 8 bit ISA card). If anyone wants one, lemme know, I'm asking $5+shipping, and I'll have the box with me at Dayton if you want to harass me about them, then. Pat -- Purdue University ITAP/RCAC --- http://www.rcac.purdue.edu/ The Computer Refuge --- http://computer-refuge.org

16 years

Help with PDP-11 Unibus Map Hardware / Software under RT-11

by jhfinedp3k＠compsys.to

Hopefully, this request is clear enough to be understood. Both the software and the hardware portion of the questions are independently important, so please answer one aspect even if you can't help with the other. Over the past 30 years of using PDP-11 software (RT-11 over 95%) and hardware, I have never had occasion to use a Unibus system with more than 256 KB of memory (such as a PDP-11/34). I would appreciate help in understanding the Unibus Map hardware which (if I understand its purpose correctly) is to convert 18 bit addresses given to a Unibus controller into 22 bit addresses for real physical memory for systems like a PDP-11/84 and perform DMA from / to the hard drive. Also helpful would be an explanation of the related software used under RT-11 along with exactly where the Unibus Map hardware is located on a real DEC system (on the CPU board I presume) since the identical CPU board is used for both the Qbus and the Unibus with both the PDP-11/84 and the PDP-11/94. ------------------------------------------------------------------------- DO NOT READ THE FOLLOWING if you don't use RT-11!!!!!!! By way of context, I have successfully modified the HD0: device driver originally written by John Wilson which obviously executes ONLY under E11. Last week, John mentioned in a private e-mail that it is possible to direct the HD0: "controller" (all references to hardware in quotes refers to E11 software) to ignore the "Unibus Map hardware". Since I execute under E11 using Qbus emulation in order to stay totally compatible with the real DEC PDP-11/23, PDP-11/73 and PDP-11/83 systems (all Qbus and all with 4 MB of physical memory) which I have available for comparison testing, user buffers in physical memory above 256 KB are often a situation which can't be avoided. Consequently, it had always been a high priority to have a 22 bit device driver for HD0: under E11 BECAUSE HD0: is TWICE as fast as MSCP (DUX.SYS device driver). In addition, I have also been able to write code that avoids the overhead of using the HD0: device driver which makes HD0: FOUR times as fast as MSCP and also allows for direct access of 2 TB of disk space via a 32 bit block number. Since I have an immediate application for a data base of 32 GB (I have a disk drive of 160 GB, so 32 GB is only 20% of its capacity - although under RT-11 15 years ago in 1992, 32 GB would have been only a dream), the code which I have written will actually be used quite soon. However, I would very much like the HD0: device driver to be able to execute under both "Qbus" and "Unibus" hardware. And while I can test the code for a "Qbus" and for a "Unibus" without a "Unibus Map", I am not clear about what is required for a "Unibus" with a "Unibus Map" such as a PDP-11/84 running under RT-11. Megan are you still watching the list? Allison, if you can't answer, can anyone but Megan help? Is anyone else familiar enough with the "Unibus Map" that you can suggest what RT-11 actually needs to do with the "Unibus Map"? A solution is to check the "hardware" configuration and refuse to allow the HD0: device driver to LOAD or .Fetch if the modified version is not executing under "Qbus hardware". By the way, if anyone who is thinking of a controller for the Qbus which is able to use SATA drives, I would be happy to modify an RT-11 device driver to an HD0: type device that is able to handle drives up to 2 TB in the same manner that DU(X).SYS can handle drives up to 8 GB. Anyone interested?? Sincerely yours, Jerome Fine -- If you attempted to send a reply and the original e-mail address has been discontinued due a high volume of junk e-mail, then the semi-permanent e-mail address can be obtained by replacing the four characters preceding the 'at' with the four digits of the current year.

16 years, 2 months

Making an RT-11 boot disk

by dbetz＠xlisper.com

I'm trying to use simh to create an RT-11 bootable RX50 disk and am following some instructions posted by Megan Gentry a while ago. I've created the disk image but am having trouble making it bootable. The copy/boot command claims it can't find the RT-11 image but it is clearly on the floppy (du0). Any idea what's going wrong? .dir du0: 10-Apr-99 RT11XM.SYS 106P 20-Dec-85 DU .SYS 8P 20-Dec-85 TT .SYS 2P 20-Dec-85 PIP .SAV 30P 20-Dec-85 DUP .SAV 47P 20-Dec-85 DIR .SAV 19P 20-Dec-85 RESORC.SAV 25P 20-Dec-85 EDIT .SAV 19P 20-Dec-85 MACRO .SAV 61P 20-Dec-85 CREF .SAV 6P 20-Dec-85 LINK .SAV 49P 20-Dec-85 LIBR .SAV 24P 20-Dec-85 FILEX .SAV 22P 20-Dec-85 HELP .SAV 132P 20-Dec-85 BATCH .SAV 26P 20-Dec-85 FORMAT.SAV 24P 20-Dec-85 SETUP .SAV 41P 20-Dec-85 SPEED .SAV 4P 20-Dec-85 DATIME.SAV 4P 20-Dec-85 LET .SAV 5P 20-Dec-85 SPLIT .SAV 3P 20-Dec-85 CONFIG.SAV 7P 20-Dec-85 SWAP .SYS 27P 20-Dec-85 23 Files, 691 Blocks 95 Free blocks .copy/boot du0:rt11xm.sys du0: ?DUP-F-File not found DU0:RT11XM.SYS

16 years, 2 months

TU-58s (was Re: Some progress with my PDP-11/73 system)

by ajp166＠bellatlantic.net

> >Subject: TU-58s (was Re: Some progress with my PDP-11/73 system) > From: "Ethan Dicks" <ethan.dicks at gmail.com> > Date: Wed, 11 Apr 2007 21:54:24 -0500 > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > >On 4/11/07, Jerome H. Fine <jhfinedp3k at compsys.to> wrote: >> But I once had a project that >> used a real DEC TU-58. Not the fastest "random" >> access device!!!!!!!!!!!!!!!!!! > >They work better as "sequential" access devices - being long and thin >and travelling in one dimension, go figure. We used to optimize file >order on our console TU58s to speed up the boot times on our 11/725s >and 11/730s. Since the file order doesn't change, one just builds a >TU58 with EXCHANGE with each file following the other. The console's >8-bit-micro must cache the directory block, since the tape didn't whip >back to the start between each file. > >Using unaltered console tapes from DEC resulted in, IIRC, about 15 >minutes from turning the key to booting the hard disk. Replacing that >tape with one of our own devising shortened that pre-boot time to well >under 3 minutes. > >I'd hate to rely on a TU-58 and no other block-addressable media on a >PDP-11, though. I survived a PDP-8 with a TD8E and TU56, but it was >somewhat tedious (cool to watch, though). TU-58s weren't as cool, >IMHO. So happens one of my "small" pdp-11s uses a Tu58. the system is a BA-11V with an 11/23 256k of ram, DLV11J and MRV11 rom(boot). Takes 10 minutes to boot, setup VM: then copy key files to and reboot. After that it's pretty decent even if I have to access a file on tape. Everytime I runs it with a bunch of kids of the current PC generations they go gaga and comment on how slow then I explain the amount of ram and storage then they are amazed it can be a functional machine with so little. They can't imagine a useful machine with 32kW of ram and 256kb of storage. On the flip side I've used that same Tu58 to bring up iron that had no removable storage. It's slow but very dependable. Allison

16 years, 2 months

lead-free solder (was: Setting up a VAXstation)

by halarewich＠gmail.com

heres a link to some lead solder http://www.acehardware.com/product/index.jsp?productId=1290635&cp=2568443.2… Chris On 10/2/07, Zane H. Healy <healyzh at aracnet.com> wrote: > > At 11:37 PM +0100 10/1/07, Tony Duell wrote: > >For the first part, I'd offer to do it for you, but it would be illegal > >to do so. Owing to our totally daft laws, (a) I'd have to use lead-free > >solder, which I don't have, don't trust, and am not set up to use and > > How hard is it to work with lead-free solder, and is it becoming a > problem to get traditional solder in the US? I've been meaning to > pick up a few rolls. As I'm still using a roll purchased in the 80's > from Rat Shack for building a couple things for my VIC-20, I haven't > been going through it that fast. Though I seem to be using it more > often now than. > > >(b) > >it has been said that if an enthusiast (specifically a model engineer, > >but it would apply here too) does jobs for others, then his workshop > >becomes a workplace and is covered by all the daft health-and-safety > >rules that I have no desire to get involved with, and which quite > >honestly, would stop me from getting on with things. > > Does it count as a job if you don't take payment? > > Zane > > > -- > | Zane H. Healy | UNIX Systems Administrator | > | healyzh at aracnet.com (primary) | OpenVMS Enthusiast | > | MONK::HEALYZH (DECnet) | Classic Computer Collector | > +----------------------------------+----------------------------+ > | Empire of the Petal Throne and Traveller Role Playing, | > | PDP-10 Emulation and Zane's Computer Museum. | > | http://www.aracnet.com/~healyzh/ | >

16 years, 3 months

Where to find memory ICs?

by trixter＠oldskool.org

Have a working Intel Above Board Plus 8 with 2MB RAM and would like to populate it to the full 8MB. It will take 120ns or faster 1mbit chips -- but where can one find that kind of thing nowadays? Are those still commercially available or am I going to have to scavenge them from somewhere else? Manual lists acceptable part numbers like: Fujitsu MB81C1000P-xx Hitachi HM511000P-xxS Mitsubishi M5M41000AP-xx Motorola M5M511000P-xx NEC UPD421000C-xx NMB AAA1M100-xx OKI M511000RS-xx Samsung KM41C1000P-xx TI TMS4C1024-xx Toshiba TC511000P-xx ...etc but google searches haven't been very fruitful (that is, the pages returned when I search for IC part numbers don't return vendors with plain pricing/availability info). I just want a few tubes of these to populate the board, I'm not looking for a box of 'em :-) Any pointers? -- Jim Leonard (trixter at oldskool.org) http://www.oldskool.org/ Help our electronic games project: http://www.mobygames.com/ Or check out some trippy MindCandy at http://www.mindcandydvd.com/ A child borne of the home computer wars: http://trixter.wordpress.com/

16 years, 4 months

Bernoulli/Syquest carts available

by SUPRDAVE＠aol.com

I've more of these than anyone will need and they're all brand new. 3 packs of Bernoulli 5.25 44meg disks KAO 5.25 88meg syquest disks. The label inside says they are formatted for Macs but includes software for wintel machines also. $1 each plus whatever for shipping and they're yours. Just say how many you want. -- I am not willing to give up my privacy for the false promise of 'security'

16 years, 5 months

Group buy of 1541-III PCB's?

by healyzh＠aracnet.com

I know there was some interest in 1541-III PCB's recently. Vincent Slyngstad and I have been discussing this since that time, and he has done up schematic in Eagle CAD and has the initial board layout done (actually three different versions using different SD Sockets). The big difference between this and the original design is that it uses through the hole parts wherever possible rather than surface mount parts. I'm trying to find out if anyone here will be interested in boards. I have a design question or two for anyone that is interested. Additionally, I'm looking for anyone familiar with SD Sockets, as neither Vince nor I are, and a couple questions have come up on the socket placement. Information on the 1541-III can be found at the creator, Jan Derogee's website http://jderogee.tripod.com/ Zane -- | Zane H. Healy | UNIX Systems Administrator | | healyzh at aracnet.com (primary) | OpenVMS Enthusiast | | MONK::HEALYZH (DECnet) | Classic Computer Collector | +----------------------------------+----------------------------+ | Empire of the Petal Throne and Traveller Role Playing, | | PDP-10 Emulation and Zane's Computer Museum. | | http://www.aracnet.com/~healyzh/ |

16 years, 9 months

How not to fix a classic mac (or: fried logic boards)

by trag＠io.com

>Date: Tue, 13 Nov 2007 11:17:41 -0600 (CST) >From: "Jeff Walther" <trag at io.com> >Subject: Re: How not to fix a classic mac (or: fried logic boards) >To: cctech at classiccmp.org >Message-ID: <12318.209.163.133.242.1194974261.squirrel at webmail.io.com> >Content-Type: text/plain;charset=iso-8859-1 > >> Date: Mon, 12 Nov 2007 22:45:09 -0800 >> From: Josh Dersch <derschjo at msu.edu> >> First point of business, I discharged the CRT. >> To the main chassis. This, as I have now discovered, is not what you >> are supposed to do to discharge the CRT unless you want to destroy the >> logic board. >That particular failure is documented in Larry Pina's "Macintosh Repair >and Upgrade Secrets" and probably in "The Dead Mac Scrolls" as well. I'd >look it up for you, but I don't have my books with me here. Okay, I'm home, I have my books. It says on page 98 that discharging the CRT without a big honking resistor may blow a 74LS38N (U2) on the analog board and the LAG chip on the logic board. The former sounds like it might be fairly standard. The latter sounds like it may be one of the custom programmed PALs or GALs or whatever that Tony was writing about. I wouldn't be surprised if folks had already figured out all the internal logic for the various Mac 128/512/Plus chips though. Finding it might be a bit of a challenge. OTOH, the LAG chip may be fine and it could be U2 on the analog board that has the problem. Jeff Walther

16 years, 10 months

Jump to page:

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 November 2007