test-drb May 2002

test-drb@ccmp.vtda.org

246 participants
947 discussions

by mrbill＠mrbill.net

Anybody got a copy of OpenVMS/VAX 7.2 that they can make an image of for me? (if possible; easier to download/burn than to mail)... I got one from Doc a few months ago, but cant find it now... Bill -- Bill Bradford mrbill(a)mrbill.net Austin, TX

24 years

Testing for Open Relays?

by pete＠dunnington.u-net.com

On May 18, 10:19, Zane H. Healy wrote: > I'm assuming the following means it's safe for me to have this system > connected to the net. I'm now in the process of also testing with > www.ordb.com, and have already tried the telnet trick posted earlier. > Relay test 3 > > >>> RSET > <<< > > Relay test result > > Could not reset connection, test failed. Um, no, I'm afraid it means your SMTP software bombed. It failed to go to the reset (initial) state after the second test, so the test sequence was aborted, and the remaining 16 or so (?) tests weren't carried out. I wouldn't trust that software just yet... I think the next test would have been something involving a message ostensibly from the "<>" address (which represents the mailer daemon), and then some tests involving forged addresses intended to look like your own domain, and then assorted routed or malformed addresses. Some of these are very important, and your site hasn't been tested for most of them. -- Pete Peter Turnbull Network Manager University of York

24 years

[CCTECH] Altair Assistance Request

by classiccmp＠mail.vintage-computer.com

Hello all, I am relatively new to vintage computing and this list, although I've been working and playing with computers for a long time. I am, however, a software guy and have only a little skill with or knowledge of hardware. I've recently acquired a pair of Altair computers (8800 and 8800a) both equipped with the "88-DCDD" single 8" disk drives. Unfortunately, I am having various difficulties with these machines. Hopefully the answers to some questions will push me towards a better understanding of these systems. My main issue at the moment revolves around the EPROM cards that hold the disk boot loader (DBL) PROMs for these machines. The cards are Solid State Music ?2K/4K? cards with 16 slots for 1702s. I asked the list about these cards before and have since obtained an assembly/instruction manual, but it is still unclear to me how these things are configured and addressed. There are four address switches which are supposed to address the board as follows (this is taken from the manual): Address: 000 000 to 017 377 - All switches on 020 000 to 037 377 - A2, A3, A4 on 040 000 to 057 377 - A1, A3, A4 on 060 000 to 077 377 - A3, A4 on 100 000 to 117 377 - A1, A2, A4 on 120 000 to 137 377 - A2, A4 on 140 000 to 157 377 - A1, A4 on 160 000 to 177 377 - A4 on 200 000 to 217 377 - A1, A2, A3 on 220 000 to 237 377 - A2, A3 on 240 000 to 257 377 - A1, A3 on 260 000 to 277 377 - A3 on 300 000 to 317 377 - A1, A2 on 320 000 to 337 377 - A2 on 240 000 to 357 377 - A1 on 360 000 to 377 377 - None on I see issues with this from the outset. First, assuming this is octal, the addresses past 160 000 are beyond the address space of the 8080 chip in the Altair (200 000 being 64K). As well, the gap of 16k at 160 000 to 200 000 is either an error in the manual or something I am missing since I can?t imagine the binary progression of switches having that gap. How is this card addressed? I?ve tried examining my way through the memory areas that I think are supposed to be addressed into the EPROMs (based upon various assumptions) but I get results that have me confused. Answers to some of these questions might help: Why would the address lights on the Altair not properly correspond to the address switches being set? If I set the switches at 1110111000000000, for instance, when I reset then examine the light at A11 doesn?t come on (the lights show 1110011000000000) even though I know that LED to be functioning. Why would the data lights ever show anything but on or off? I sometimes get dim glows from the data LEDs. What data can I expect to be in the RAM on boot-up? Is this answer different for Static vs. Dynamic RAM? What is the best way to execute the boot loader should I locate it? Can I set the address switches to the proper spot and run or do I need to code a simple program that will ?JMP? to the known address? Much of my confusion might stem from the EPROMs themselves since they may have been erased by time. I have a freshly burned set on order which may help. Please forgive my ignorance and this really long post. Thanks in advance, Erik _______________________________________________ cctech mailing list cctech(a)classiccmp.org http://www.classiccmp.org/mailman/listinfo/cctech

24 years

[OT] Seeking Mac Powerbook Floppy Drive

by mythtech＠mac.com

>Well, a diskette jammed in the PB 5300ce's drive last week, >and in addition to a spring or something broken or missing >on the eject mechanism, I seem to have knocked the upper >head out of alignment, so it's kaput (and the topic is >admittedly off-topic as the 5300 is a 1996 product). > >Assuming no one has one, I'd really appreciate it if those >of you who come by such things on a fairly regular basis >would keep an eye out for one. They may be unique to the >5300, or may be used in one of the contemporaneous models. > >I'm sure Shreve Systems likely has them, but their prices >vary widely, perhaps based on supply/demand, perhaps not. Check the LEM Swap list. you can subscribe at www.lowendmac.com. If you don't want to deal with subscribing just to look for one item, let me know, and I will be happy to act as proxy for you. -chris <http://www.mythtech.net>

24 years

[CCTECH] Altair Assistance Request

by labomb＠rochester.rr.com

Hello Erik, Tony's response to your post was right on. I would like to add that the MITS boot eprom must be located at 177400 (or FF00H) to work correctly. So in your case, all switches should be off to locate the card at 360 000 to 377 377 (F000 to FFFF) in the last 4k block. The DBL eprom should then be in the last socket (highest addressable socket) of the eprom card. Once things are configured correctly, you should be able to set the front panel switches to FF00, hit 'Examine', and then hit 'Run' ... at which point the drive should enable, the head should load, and then an attempt to read the boot tracks (0-5 is typical for MITS software) should proceed. Best regards, Scott

24 years

E&S PS-390

by pat＠purdueriots.com

I saw a pair of Evans & Sutherland PS-390's (small end table sized) down at Purdue Salvage today. I was wondering if they had any value... I saw a few cables for them and keyboard and a digitizing tablet, but no monitors. Drop me a line if anyone wants one. I should be able to get them for somewhere between $50 and $100 for it all (both of them + accessories). Also there were several binders full of stuff. At a minimum, I'm gonna get the manuals for them... -- Pat

24 years

VAX 11/780 powered up and going :-) only a little :-(

by gunther＠aurora.regenstrief.org

Hi, finally I got around branching off a power line from my 220V 60A dedicated computer power circuit :-) I have all three phases of the VAX connected to a single 110 V phase. Matt, I fiddled with the fuses and found that I had to have F1 and F2 connected or else more than half of the outlets would habve no power. This whole power distribution and interlock system is still a mystery to me, does anyone have schematics for it? What worries me is that the key switch seems to have no effect whatsoever, it doesn't provide any more or less power, and throwing it from OFF to LOCAL doesn't effect any reboot attempt on the console system. Anyhow, I can get to the console and do some @140200G and indeed the RX01 starts klicking and up comes the console program. It tells me that the WCS and FPLA versions mismatch, (0E-xx vs 0F) but that isn't fatal, I gather. Then I did a TEST with the MIC diagnostics floppy and that runs through sections 01 to 07 and then has an error to report with module M8234 (PCS CPU PROM CONTROL STORE, as I gather.) The appropriate course of action would be to call DEC field service and replace the board, I guess. Too bad. I suppose the trick with replacing the M8234 will be the PCS version. I noted that if WCS and PCS versions mismatch, that would be a fatal error to begin with. That means it will be extremely hard to replace the PCS, or won't it? Could one do anything to repair that PCS? I suppose so, but not if one has no idea what's wrong with it. Any advice? Back in normal console mode, I tried to do a BOOT anyway, just to see if that PCS problem may be not that bad. But that's a no go, it comes up to a failure pretty quick. Could be that it's just because the default boot device isn't there, but it's too quick with the error. So, that will be a more difficult start then. But I guess I'm still lucky because at least I can get to the MIC diagnostics at all (poor Matt.) But of course one wonders what else might be broken? Is there a way to copy console floppies? I noticed some serious bit rott, as only one out of three standard console floppies actually worked. I guess it's about time to back up the good ones before they go too. thanks -Gunther -- Gunther Schadow, M.D., Ph.D. gschadow(a)regenstrief.org Medical Information Scientist Regenstrief Institute for Health Care Adjunct Assistant Professor Indiana University School of Medicine tel:1(317)630-7960 http://aurora.regenstrief.org

24 years

[CCTALK] RE: [CCTECH] TRS-80 Model 1 List bifurcation

by nemesis-lists＠icequake.net

Tony Duell wrote: > [Long political rant deleted] > > Could somebody please explain to me how that rant has anything to do with > classic computers Hehe... I think the problem is that good old Godwin's Law [http://www.godwinslaw.com/] seems to infest this list at times. :) People are too willing to fan the flames when quasi-political ranting is brought up, instead of letting the moderator take care of it. That's the real problem. -- Ryan Underwood, <nemesis at icequake.net>, icq=10317253

24 years

[CCTECH] Altair Assistance Request

by IVIE＠cc.usu.edu

Eric Klein said: > I see issues with this from the outset. First, assuming > this is octal, the addresses past 160 000 are beyond the > address space of the 8080 chip in the Altair (200 000 being > 64K). Not if it's split octal. Each byte converted to octal and listed separately. Roger Ivie ivie(a)cc.usu.edu

24 years

MicroVAX 3100/90

by Antonio.Carlini＠riverstonenet.com

> jkunz(a)unixag-kl.fh-kl.de wrote: >On 17 May, Antonio Carlini wrote: > >> There should be a little slide switch at the back. When it is >> up it will use that port (3 - with the printer icon) >And what will it do when the switch is down? Autoboot? I know that >switch from VAXstations to switch the machine from graphics to serial >console. But this machine has no graphics. With the switch down (the normal position) the console is on MMJ-0 and a <BREAK> on the terminal will be ignored. With the switch up MMJ-3 will be used as the alternative console and <BREAK> will halt the system. As far as autobooting goes, that's not dependent on the switch setting - it depends on the console settings as stored in NVRAM. I think this is pretty much the same for all the MicroVAX 3100 systems. It is also true for all the VAXstation 3100/4000 systems except (as you note) with the switch down the graphics head is used as a console and not MMJ-0. Antonio

24 years

← Newer
1
...
29
30
31
32
33
34
35
...
95
Older →

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 May 2002