test-drb February 2018

test-drb@ccmp.vtda.org

160 participants
141 discussions

8" floppy drives from AMD development system?

by classiccmp＠crash.com

Anybody notice this eBay auction? https://cgi.ebay.com/itm/222816138475 I'd guess it was part of a packaged AMD development system, maybe somebody recalls some specifics...? Or maybe that it was something else? Google is returning a lot about Age-related Macular Degeneration, and other misses where they helpfully turn "AMD" into "and" ... Thanks, --S.

6 years, 5 months

How to enable USB drives in both Windows 98SE AND MS-DOS 7.1.

by seefriek＠gmail.com

From: Curious Marc <curiousmarc3 at gmail.com> > > On Windows 7, using regedit, set > ?HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Lsa\LMCompatibilityLevel? to ?1? > You might need to create the new entry under \lsa as a REG_DWORD, set to 1 > As your friendly neighbourhood infosec type, please be aware that this setting opens a rather nasty set of possible security issues. Fine on your lab network, but you probably don't want a machine configured like that on a possibly hostile network. KJ

6 years, 5 months

Microvax II 'primer'?

by jules.richardson99＠gmail.com

So, I picked up (and I did just carry it into the house, and now I hurt) a Microvax II from another list member yesterday. Cosmetically it's a disaster (BA123 has a cracked top panel, broken wheels, missing front door, missing right-rear panel) but internally it appears to be complete; board wise we have: M7606 - CPU M7608 - 4MB ram M9047 - grant continuity M7504 - DEQNA ethernet M3104 - DHV11 8-port serial M7555 - RQDX3 disk controller M7546 - TX50 controller ... it's got a TK50 and hard drive (no idea of capacity). Operational status is a complete unknown, and I have absolutely zero knowledge about these systems - so my question at this stage is what background reading I need to be doing in terms of pre-powerup* checks, actually hooking a console, if there's a suggested minimal config I can use to diag the CPU, and then (assuming it gets to that point) how to actually use the thing (I'm assuming it was running VMS rather than Ultrix, but I don't know for sure). I'm wondering there aren't any handy tutorials out there, alongside whatever DEC docs are recommended. * e.g. for most machines I'd be thinking in terms of pulling all boards/drives, hooking up a dummy load to whatever PSU rails required it, and then at least running the PSU up in isolation first, but I don't know to what extent this machine requires some logic in place for the PSU to even run. cheers Jules

6 years, 5 months

Searching for EBBS][

by jplist2008＠kiwigeek.com

As the title suggests, I'm looking for a copy of the EBBS][ software for a friend who used to run an Apple based BBS many moons ago and is looking out for a bit of nostalgia. So far he's been unable to locate the disks the system used to be on (he suspects damaged in a storage space flood in the late 90s) and my google fu is weak. Would anyone be able to help us out here? Replies should probably be kept off-list. My thanks to all; - JP

6 years, 5 months

Google, Wikipedia directly on ASCII terminal?

by martin＠meiner.ch

Hello guys. I am a passionate collector of old computerhardware (PDP8?s) and terminals from the very early 70ies. It has always been my aim to be able toconnect a modem or an acoustic coupler directly to one of my ASCII terminals,dial a number and be connected?with Google! Something like Google-interface but convertedto match ASCII terminals (only text, very simple graphics). I am aware that all searches that returnpicture sand graphics will not be displayed. But at least search-page should bein plain text, and many websites may as well. Wikipedia would be great? Does anybody know if there exists such anaccess-number where this conversion is already made, or is there a small deviceon the market that allows on one side connect to a dial-up modem and on theother side to the terminal and doing the ASCII conversion stand-alone? ?It would be really cool to be able todemonstrate to folks that these terminals can actually look up pages on Googleand (with limitations) also access some pages. Something similar has actually been done in an artisticway a few years ago under: http://www.masswerk.at/googleBBS/or http://www.masswerk.at/google60/ But I need the real thing working where I canconnect my terminals to?? Any help is appreciated

6 years, 5 months

CLASSICCMP vs. RackSpace or Gmail

by healyzh＠aracnet.com

Is anyone able to get email from this list via either CLASSICCMP or RackSpace? When I first changed over to using the healyzh at avanthar.com address, I was able to receive email from the list for a short time. I've even tried to subscribe with a gmail account, and no luck. My aracnet address is no longer reliable, and will not willingly be renewed. Zane

6 years, 5 months

[RESOLVED] Re: EPROM baking

by kspt.tor＠gmail.com

On 5 February 2018 at 20:06, Chuck Guzis via cctalk <cctalk at classiccmp.org> wrote: > I have a similar gripe with barrel connectors, > which don't seem to enforce any standard at all regarding polarity or AC > vs. DC. .. which led me to accidentally power a USB hub with 12V instead of 5V - the power supplies looked the same, had the same plug, and I couldn't read the tiny writing on the warts. That blew the nicest notebook PC I've ever found - I bought it in Japan at a special price, the normal price is out of my league. Since then I have bought a Dymo and, armed with a magnifying glass, went through all the chargers and warts I own and labelled them. Which I should have done *before* the accident of course. But what if there was some kind of standard for barrel connectors instead.. sigh.

6 years, 5 months

PDP8E 3.75V on Omnibus issue

by mail.nickallen＠gmail.com

Hey everyone, thanks for always serving as a great sounding board and source of advice! I have an issue with a PDP8E which has an issue with the power supply.? The -15V, 15V, and 5V are good, and my Bus Loads board is good, but for some reason the power supply is bringing down the 3.75V signal from the bus loads to 0V (this is the DC VOLTS OK grey wire from the power supply). I'm having troubles finding the schematics of the PDP8e power supply, also any suggestions on what could be pulling the 3.75V to 0V (tested multiple Omnibus backplanes, and bus load boards, so I'm fairly certain it's the PSU). All help is MUCH appreciated, thanks!

6 years, 5 months

VMS 8.4 Alpha Hobbyist disk images

by bob＠theadamsons.co.uk

> Date: Thu, 1 Feb 2018 12:55:41 -0500 > From: Douglas Taylor <dj.taylor4 at comcast.net> > To: "General Discussion: On-Topic Posts" <cctech at classiccmp.org> > Subject: VMS 8.4 Alpha Hobbyist disk images > Message-ID: <92b4de6a-b537-4bfb-a1fd-1ebe8133f11a at comcast.net> > Content-Type: text/plain; charset=utf-8; format=flowed > > I'm getting an Alphaserver 1000a and wanted to install VMS 8.4 - > hobbyist license from CD. > > So, I went to the folder on my PC where I have the 8.4 hobbyist > distribution.? There are 3 ISO files; ALPHA084, ALPHA084LP1 and > ALPHA084LP2. > > I thought I would burn these to CD and up and away.? However, Windows 7 > balks and says, 'The selected disc image file isn't valid'. > > Is it Windows 7 or is there something I'm missing?? Is the CD on the > Alphaserver 2048 byte block size or 512? > > Doug They _are_ 'ISO' images but in a format which Windows 7 or whatever burning program you're using doesn't understand. I used Nero (or Daemon I think) to write CDs for my VAX but there will be plenty of other programs equally suitable. You don't need to do anything special, just treat them as an ISO image and let the burning software get on with it. Once written, Windows won't be able to read them so don't panic. If the burning software includes verification then it (not Windows) will be able to read them back OK. (I'm using VMS v7.3 but I'm sure this is no different). Generally AFAIK the CD readers on Vaxes (Vaxen - ugh!!) and Alphas will deliver 512 byte blocks but this isn't relevant for the image itself. Bob

6 years, 5 months

EPROM baking

by Mark＠Misty.com

Hi, I am working on several projects requiring 2708 and 2716 EPROMs, and am finding some of my chips will not erase, and some will not take a program. I've also learned more in the past week than I wanted to know about repairing Data-I/O 29a/b programmers. I vaguely remember in the 1990s baking such EPROMs in the oven, but I do not remember temperature or time. I was surprised that Google didn't turn up anything useful with this info. I'm sure someone here will have some notes on EPROM baking. Mark -- Mark G. Thomas (Mark at Misty.com), KC3DRE

6 years, 5 months

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test-drb February 2018