test-drb April 2002

test-drb@ccmp.vtda.org

280 participants
1162 discussions

Shoddy Hardware (Was: Re: WW fixtures (was Re: "New" PDP-8))

by jeff.kaneko＠juno.com

On Tue, 2 Apr 2002 23:44:50 +0100 (BST) ard(a)p850ug1.demon.co.uk (Tony Duell) writes: > > I think this started when we (the U.S.A.) began importing > > parts made in communist countries. > > Well, I spent most of the weekend inside a small East German camera, > > about 40 years old. > > I was seriously impressed by the general engineering (anyone who > makes a > leaf shutter that can do 1/750s gets my respect!), the build quality > and > the repairer-freindlyness of the design. I've found few cameras as > pleasant to repair. > > So not all communnist-country products are badly made... Actually, I should have specifically fingered Red China, which is the only communist country that is a major supplier to the U.S. I never saw real, unadulterated *junk* until I looked at what has been spewing from Red Chinese factories . . . Jeff ________________________________________________________________ GET INTERNET ACCESS FROM JUNO! Juno offers FREE or PREMIUM Internet access for less! Join Juno today! For your FREE software, visit: http://dl.www.juno.com/get/web/.

22 years, 3 months

Austin, TX: Free Rack-Mounted VAX

by tsm＠palindrome.org

Free rack-mounted VAX available in Austin, TX. Badged as a MicroVAX II, has a KA-655 CPU (MicroVAX 3800/3900), 32MB of RAM, and standard DELQA, RD54, TK50, etc. In H9642 (42") rackmount cabinet. Located in central Austin. Will go to the landfill if no takers. Please e-mail me if interested or have any questions. Thanks, Terry

22 years, 3 months

New items have appeared in your saved search: Core Memory

by bill_r＠inetnebr.com

E-mail from eBay: "New items have appeared in your saved search: Core Memory" Clicking on the item link, we find: >The Core Memory Plus Pillow conforms to your head for a soothing, customized fit. > Layered memory foam promotes a proper sleeping posture, while the resilient foam > base provides therapeutic values. I'd think those ferrite beads would leave a pretty nasty imprint on your face, not to mention getting poked by the wires all the time. So, how many bits are these things, anyway??? <DOH!> -Bill Richman (bill_r(a)inetnebr.com) Web Page: http://incolor.inetnebr.com/bill_r Home of the COSMAC Elf Microcomputer Simulator, Fun with Molten Metal, Orphaned Robots, and Technological Oddities.

22 years, 3 months

Harris Model 8 CPU

by healyzh＠aracnet.com

> Does anyone have any docs on the Harris 24 bit line (or > the Datacraft 6024?) Considering there are still H-series > machines in use, I've not been able to turn up much at > all on them. Somewhere I've got printouts of the JCL 'man' pages from a H550. That's ALL the doc's I've ever really seen on one. The same binder has 3 8" floppies containing documents I created with the MUSE Word Processor. Zane

22 years, 3 months

CD-ROM on RT-11?

by healyzh＠aracnet.com

> I presume from what you are saying that the Viking/QDT does not have any > boot ROMs. If so, it is one of the very few (probably the only one I know > about) NON-DEC controllers or host adapters that does not have a boot > ROM. There are four versions of the Viking board. Tape, Disk, Tape/Disk, and Disk/Boot (it can only boot a PDP-11). > Any idea if there was a DEC approved CDROM drive which did NOT > use a caddy? Sure, any CD-ROM that they had out after the RRD-42. > Any idea how much an M8190-BB (quad 11/73) might cost? I have a > couple, but I want to keep them for a few more years. But Tom might > find this is the least expensive way to go. It would probably be a worth while upgrade, BUT it would also require a backplane and memory upgrade, and as I recall he doesn't have a budget for this. As for the price I don't remember, but I know they've come down in price (I got mine as part of a trade). Zane

22 years, 3 months

SCSI options for PDP 11/23

by tom＠sba.miami.edu

After my recent RX02 problems, I've decided I'd like to add a SCSI controller in my 11/23, and keep my programs on a hard disk. What Q-bus controllers will work with RT-11? What's the minimum version of RT-11 that I can get by with? Can I use any disk, or does it have to be something in particular? Thanks, Tom

22 years, 3 months

Core Memory Interfacing?

by ajp166＠bellatlantic.net

Hi, The boards I have are: assy pn40827-05 rev-6 (has 3 82s181 proms on top edge) assy 40505 rev-C (has crystal and berg connector on top) Building a cpu is anything but practical... why should modding this? ;) Allison -----Original Message----- From: Loboyko Steve <sloboyko(a)yahoo.com> To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org> Date: Friday, April 05, 2002 1:47 AM Subject: Re: Core Memory Interfacing? > >I have the Xerox Hytype II service manual with >schematics of the infamous Logic I and II boards, >several versions. Let me know the Board #'s and etch >and if I got 'em, I can scan them. I used to repair >these printers (mostly at a board level) in a previous >life. > >I don't know if making them into your own CPU would be >practical but there sure is a lot to learn on these >two boards...even now. > >--- "Peter C. Wallace" <pcw(a)mesanet.com> wrote: >> On Thu, 4 Apr 2002, ajp166 wrote: >> >> > From: Peter C. Wallace <pcw(a)mesanet.com> >> > > >> > >Hytype IIs also use a 8 bit TTL based microcoded >> machine (IICRC they use >> > >74LS283 adders, 74LS170 register file chips, >> along with bipolar >> > PROMS)... >> > > >> > >> > >> > I have a few of those boards... Wich I had the >> correct prints for the >> > board numbers >> > I do have. Could be fun to bend them into a >> general purpose 8bitter. >> > >> > Allison >> > >> > >> > >> >> I remember playing with that idea many many years >> ago. I dont think it has >> much of an address range though... >> >> >> >> Peter Wallace >> > > >__________________________________________________ >Do You Yahoo!? >Yahoo! Tax Center - online filing with TurboTax >http://taxes.yahoo.com/ >

22 years, 3 months

CP/M and Imsai

by ajp166＠bellatlantic.net

From: Hans Franke <Hans.Franke(a)mch20.sbs.de> > >> Is a good thing. The extensions are very fine. > >Gaby is very determinated wehn it comes to CP/M. >Girls ... :) We can't do math but we seem to gravitate to CP/M. ;) It's still a favorite as it does have a decent filesystem and is fully understandable without reading source code. Allison

22 years, 3 months

Software Preservation (was: SIMTEL...)

by ajp166＠bellatlantic.net

From: Zane H. Healy <healyzh(a)aracnet.com> > >I've already become convinced the only practical way to preserve it is onto >live filesystems that are regularly backed up. I do that. Further I usually use a SET or drives if they are the fixed media as then if one fails the other unpowered twin is valid. SCSI RZ2x and 5x drives are handy for that though I also use RD52s, and ST225s. Allison

22 years, 3 months

Shoddy Hardware (Was: Re: WW fixtures (was Re: "New" PDP-8))

by ajp166＠bellatlantic.net

From: Chad Fernandez <fernande(a)internet1.net> >I've read about bolt types on Brit bikes a bit. It seems that they had >a variety of things they called Whitworth. > >Chad Fernandez >Merle K. Peirce wrote: >> That's because you had the wrong wrenches. I've always wanted to have >> someone ask me for a half-inch wrench and hand him a Whitworth >> half-inch. I think there's a set in the Rover. Whitworth were decimal inch sizes. I have a set from about 30 years back along with metric and fractional inch sizes. What I dont have is a pair of vise grips, feh! Allison

22 years, 3 months

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test-drb April 2002