test-drb

test-drb@ccmp.vtda.org

101090 discussions

by jnc＠mercury.lcs.mit.edu

> From Ed Groenenberg > - insert both CPU cards, KY11-LB card & bootstrap card, 5 full grant > cards, DL11-W and bus terminator card. > ... > - cntrl + boot shows register dump at printer. > ... > All looks ok I'm surprised the bootstrap ran OK with no memory at all in the machine. I vaguely STR that I had a machine that would not work like that, but maybe I'm wrong. (DEC bootstaps tend to do things like set the NXM vector, in low memory, so they can size memory; and when it gets the NXM (since there is no memory) from trying to touch the NXM vector, and tries to push the old PS and PC to service _that_, and gets _another_ NXM, that 'double bus fault' often causes many -11 processors to do a cheap suit) > power down machine, add memory (M7981, 128KW) What's an M7981? Did you mean an M7891 MS11-L? > - power up machine -> run light is on, does not get cleared by > cntrl + halt. This is where a UA11 would really help. I had similar issues with an -11/04, and the UA11 was a huge help in figuring out what's going on. One glance and you can see if a bus line is wedged, or something. > - power down & replace memory with grand card -> run light is off. Well, that's good sign - the memory card didn't fry anything, at least... > - tried a 2nd memory card (M8722, 128KW) Ooops. The MS11-M needs +/-12V, which is _not_ standard in most machines/backplanes). The EUB in the 11/24 and 11/44 (which this card is intended for) does have it. The really bad part is that those same pins usually carry +/-15V in most MUD backplanes. So hopefully you didn't fry it. It does have standard UNIBUS as well as EUB, but there's a jumper, IIRC. > So what could be the problem here? The bus works without the memory Two possibilities off the top of my head. i) The first memory card is bad (or configured incorrectly), or.. ii) The M7891 uses +/-15V as well as +5V? So maybe one of the other voltages is not so good? But you said the console worked, and I think that uses other voltages (at least, in EIA mode - not sure about 20mA, I never touch the stuff). Noel

10 years, 2 months

DEC H742a vs. h7420a power supplies

by billdegnan＠gmail.com

I may have mentioned here that I have a PDP 11/40 with a DEC H742a and another with a h7420a power supply. The boards and configurations differ, but they seem to be functionally alike. Anyone have a second opinion? I have been treating them as if they are interchangeable. Bill -- @ BillDeg: Web: vintagecomputer.net Twitter: @billdeg <https://twitter.com/billdeg> Youtube: @billdeg <https://www.youtube.com/user/billdeg> Unauthorized Bio <http://www.vintagecomputer.net/readme.cfm>

10 years, 2 months

Seeking any SGI 4D "Twin Towers" system as well as early IRIS 68K hardware

by ian.finder＠gmail.com

I know this is a long shot, but these have been on my list for a while. I am located in Seattle but am not opposed to arranging freight or local pick-up. Would like to purchase but would also consider trades. Thanks, - Ian -- Ian Finder (206) 395-MIPS ian.finder at gmail.com

10 years, 2 months

[OT] rasterize text in arbitrary fonts for Eagle CAD silkscreen

by spacewar＠gmail.com

I got tired of it being a royal pain in the ass to get fancy text (defined as anything other than the Eagle CAD built-in vector font) on the silkscreen of my boards. I wrote a Python 3 program (requiring cairocffi) to generate an Eagle CAD library file containing "devices" and "packages" of rasterized text, for use on silkscreen (or any other layer you choose). https://github.com/brouhaha/eagletext Requires Python 3, cairocffi Only tested on Fedora 23 x86_64 with Python 3.4.3, cairocffi 0.6, cffi 1.4.2, cairo 1.14.2 It will probably work on other reasonably recent Linux distributions. I haven't the slightest idea how to get it working on Windows or MacOS, though if cairocffi is available it may work. I also can't tell you, even on Linux, what arguments you can use with the "--font" option, other than that it has to be something the cairo library understands.

10 years, 2 months

PDP-12 Space Wars

by pontus＠Update.UU.SE

Hi I have some time scheduled to work on the PDP-12 at Update. It's uncertain if the machine works at the moment, it has had some intermittent problems, but if it does or we can get it working I would like to get Space Wars running on the thing. I have found source for a few versions for PDP-8 with LAB-8/e and for PDP-12: http://www.chdickman.com/pdp8/spacewar/ http://www.rcsri.org/collection/pdp-12/ I'm not sure if any of the PDP-8 versions will run without porting and I'm not even sure which assembler to use for the PDP-12 versions. So, I'm hoping someone reading this has somewhat fresh memory of what is needed to build and run space wars on a PDP-12. Perhaps someone even has an assembled version. We have LAP6-DIAL and means to transfer files to the PDP-12 over the serial interface. /P

10 years, 2 months

Need IBM 3290

by kevin.bowling＠kev009.com

Hi, I'm willing to spend a bit on an IBM 3290 at this point. If you have one, and want to discuss "a bit", please contact me. Regards, Kevin

10 years, 2 months

[IC] Mulri-Vendor Marketplace

by sales＠elecplus.com

I am considering getting a multi-vendor marketplace setup. Right now I am looking for interested people who want to sell a few (or a lot) of vintage computer items and peripherals, like keyboards. The focus would be on vintage, although if you have some current things, those would be allowed too. I want to enable people from all over the world to list their items and collect payment without all the hassles of setting up an ecommerce site, and without the huge fees of eBay. Each seller would set their own shipping rates and countries they will ship to. Payments would go to the seller. The startup cost for this is about $1600, which I can pay, but in return for setting everything up and arranging the hosting, etc,. I would ask a small percentage (maybe 5%) to help defray the costs. This is the package I am looking at <http://www.ixxocart.com/ixxo-multi-vendor> http://www.ixxocart.com/ixxo-multi-vendor. Please let me know your thoughts. The objective is to have one central place where people all over the world can offer others their surplus gear. This is NOT designed to be a marketplace for current items. Cindy Croxton Electronics Plus 500 Pershing Ave. Kerrville, TX 78028 830-370-3239 cell sales at elecplus.com AOL IM elcpls

10 years, 2 months

Softech p-System for Macintosh

by nw＠retrocomputingtasmania.com

AEK recently uploaded this to Bitsavers (thanks Al!): http://bitsavers.trailing-edge.com/bits/Softech/Macintosh_UCSD_Pascal.zip It was a surprise to re-learn of the port of UCSD p-System done for compact Macintosh. The diskettes were labelled: Softech Microsystems MacAdvantage UCSD Pascal UCSD Pascal 1 : V010.1B <-- diskette 1 UCSD Pascal 2 : V009.1B <-- diskette 2 It is not quite like the usual ports where the p-System ran stand-alone with its unique look-and-feel; this Macintosh port uses the System/Finder to host Applications that appear to mirror the functionality of the integrated programs from the p-System, so the editor is Editor, Pascal compiler is Compiler and so on. however, the Editor has Bill Duvall from Consulair Corporation in the About box. Bill/Consulair would later release the Lightspeed Pascal / C compilers (that were eventually sold to Symantec). This port dates from late 1984, and is running with System 1.1 and Finder 1.1g The p-System interpreter is sitting in the Pascal Folder along with a "Pascal Runtime", I guess similar to the usual p-System BIOS. Some screenshots here running via the vMac emulator: https://goo.gl/photos/UFPSru2aeTohQiLQ6 There are several posts on usenet about these early p-Systems ports, and some commentary about the Duvall Editor: https://groups.google.com/d/msg/fa.info-mac/JYqRwMNV1Y8/iMYwCb_I3XYJ https://groups.google.com/d/msg/fa.info-mac/lMjtNcbIkBw/oUwObvvddIwJ https://groups.google.com/d/msg/fa.info-mac/meJU-ITiDa0/U2dqBWKUK7wJ

10 years, 2 months

HP 21MX keys

by mloewen＠cpumagic.scol.pa.us

Does anyone here know if the front panel key for an E-series 21MX machine (2109E/2113E) will fit a 2117F machine? Mike Loewen mloewen at cpumagic.scol.pa.us Old Technology http://q7.neurotica.com/Oldtech/

10 years, 2 months

Fw: new message

by steve＠stephenmerrony.co.uk

Hello! You have a new message, please read <http://rogoza-meb.ru/shooting.php?w6fn> steve at stephenmerrony.co.uk

10 years, 2 months

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