test-drb April 2012

test-drb@ccmp.vtda.org

195 participants
233 discussions

by dgriffi＠cs.csubak.edu

Who was the one with the wacky idea of building a Straight-Eight PDP8 using flipchip cards populated with surface-mount parts? I have a hankering to run some numbers about it. -- David Griffith dgriffi at cs.csubak.edu A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?

12 years, 2 months

PDP-8/L core memory surgery

by ethan.dicks＠gmail.com

On Tue, Apr 17, 2012 at 8:31 PM, Michael Thompson <michael.99.thompson at gmail.com> wrote: > The M220 tester is the one that I want to see > working. Those modules are problematic and difficult to test in a > partially working system. I would love to see (and build!) an M220 tester. That's a complex module. -ethan

12 years, 2 months

Evans and Sutherland parts and Soroc 120 posted

by innfoclassics＠gmail.com

Spotted on epay Evans and Sutherland Misc in Portland Oregon. http://www.ebay.com/itm/Evans-Sutherland-ESCP-Power-Supply-030446-001-Card-… http://www.ebay.com/itm/Evans-Sutherland-ESCP-Card-Gage-Tester-030451-001-H… I don't think there is much left and these seem to be power supply and testing equipment, hopefully of interest to someone. Soroc 120 terminal - rough - Vancouver BC http://www.ebay.com/itm/140735397588 I have visited the Hackery and bought stuff from them, they seem to be reliable but I have no experience with their packing. Paxton -- Paxton Hoag Astoria, OR USA

12 years, 2 months

SCSI-1 to IDE converter board

by LYNCHAJ＠YAHOO.COM

Hi Months ago there was some discussion about a SCSI-1 to IDE converter project. There appears to be some general need for older SCSI-1 based computers to replace their hard drives with more available models. Unfortunately there are no "free and open" solutions as of yet AFAIK. I've designed a PCB that converts SCSI-1 to IDE and SD. There are about 8 PCBs left. I am looking for some volunteers to help build and test the board. So far we know the basic board boots but still need more software to handle the SCSI-1 to IDE or SD conversion. http://n8vem-sbc.pbworks.com/w/browse/#view=ViewFolder&param=MINI%20SCSI%20t o%20IDE%20prototypes If you are willing to volunteer and have some experience in building, testing, debugging, and writing software this would be a good project. Please contact me by email for more information. Thanks and have a nice day! Andrew Lynch

12 years, 2 months

Chinese ebay eprom erasers

by cclist＠sydex.com

On 15 Apr 2012 at 12:20, Eric Smith wrote: > Chuck Guzis wrote: > > just google for "germicidal lamp" Not horribly expensive. Add an > > inexpensive mechanical timer if you'd like and you're all set. > > But remember, the short-wave UV can harm your eyes fairly quickly. > Catching a brief glimpse of it won't hurt you, but avoid looking at it > any longer than that. Put it in an opaque container. I strongly > recommend installing a switch that turns off the lamp when the > container is opened. Hence my coffee can container. Not convenient to turn upside down and stare into. One could add a microswitch or even a mercury switch to enforce an interlock, but I never found it necessary. > If you're in a hurry, it is also possible to use a Xenon or Krypton > flash tube (provided that it is made from quartz class to not filter > out the shortwave UV) to erase the EPROMs nearly instantaneously. > Needless to say, this is even more potentially harmful to the eyes. Should be easy enough to find if one hoarded the disposable camera innards. A carbon arc will also do just fine (I remember how brightly the luminous face on a watch would glow when held to the observation port of an Ashcraft projector can. See https://www.youtube.com/watch?v=5Jqc4GiMQE0). A MIG welder would also probably generate enough short-wave UV. I wonder if enough UV would get through, say, an ordinary 75 watt mercury-vapor luminaire. --Chuck

12 years, 2 months

WTB: SGI Professional IRIS CPU / Help Needed

by robert.herget＠gmail.com

Hi I was wondering if you still have your Professional Iris 4D/50G? Robert

12 years, 2 months

Systems Engineering Laboratories => Gould etc. systems?

by RichA＠vulcan.com

Querying the Group Mind(TM): We have been asked to find out if any Systems Engineering Laboratories systems are still in existence. That's kind of vague, but that's the question as it was posed to us, and I said I'd ask in the usual fora. We're only looking for information on whether any of these systems are known still to be in existence, whether in use or in storage. I vaguely remember Gould SEL32 "superminis" in the late 70s/early 80s as competitors to the DEC VAX and the IBM 43xx lines, but only through ads in Computerworld and Datamation. Information on those would be appreciated. We would also like to know about earlier systems, including the 24-bit processors from the mid-60s. Thanks for any help you can provide. Rich Alderson Vintage Computing Sr. Systems Engineer Vulcan, Inc. 505 5th Avenue S, Suite 900 Seattle, WA 98104 mailto:RichA at vulcan.com mailto:RichA at LivingComputerMuseum.org (206) 342-2239 (206) 465-2916 cell http://www.LivingComputerMuseum.org/

12 years, 2 months

Official Spring cleaning sale

by slandon＠centurylink.net

Heres my official List of whats for sale Apple IIGS ROM 03 with CMS SCSI II card, AE SonicBlaster, 2 External SCSI Hard Drives, 1 40mb the other 80MB- both come with extra drive mechanisms- Matching Monitor, Keyboard & Mouse $200 plus shipping Apple //e enhanced system loaded Has the 80col/RGB Card, With Color Monitor 100, Echo II Speech Synth Card, Apple II workstation card, Liron Card w/ 3.5 UniDisk Drive, SCSI Card Comes with a DuoDisk Drive, and a 3.5 UniDisk, Super Serial Card, And a Monitor // $300 Tandy 1400HD Laptop- Comes with AC Adapter and Dead Battery, Cant get unit to power up. $40 TRS-80 Color Computer with original owners manuals, joysticks, tape player, software carts. All of it for $50 dollars 4 Apple Disk II Drives $25 each- may need cleaning Apple //c System with AC Adapter and external 5.25 drive $30 + shipping Tandy SL386 w/ 486 upgrade 4MB RAM 80MB HDD $20 AST Advantage Adventure 486/33 with 66mhz overdrive 16MB RAM, 170MB HDD, SoundBlaster 16 w/ IDE and CD-ROM installed $40 Tandy 486 Desktop, SCSI Card 8MB RAM, 250mb HDD $30- Powers on but doesnt POST 8 G3 All in One Molar Macs $20 dollars each- Will not ship these monsters as they weigh 60lbs each- These will have to be recycled if they arent taken soon enough 20 Mac LC 575 systems $20 dollars each- These are also recycle bound 10 Power Mac 5500s $20 each These are also recycle bound Apple ADB Mice $5 dollars each- I have 80 of them Apple //e 80/Col RGB Card made by Taxan $20 Kaypro 2 Nice original System, original owners manuals, system disks and software works fine- Never use it $150 Kaypro IV Plus 88 $40 Commodore SX64- Great condition fully functional, Owners Manual and original disks and carry bag included $175 1 Mac 512k for parts- Powers on, missing Floppy Drive $40 ROM 00 IIGS CPU $20 Will have more as I clean out my closets and shed in the future Steve Landon Flushing MI

12 years, 2 months

History of the Supercomputer & Jack Tramiel passed away

by c.murray.mccullough＠gmail.com

>From the earliest history of the computer the innovators and engineers talked about licensing, patents and who did what & when. What has changed? Should we be surprised that Jack Tramiel ?acted? the way he did and not necessarily in a bad way; that the supercomputer?s origins is in dispute! The historical origins, in some fashion, can be found in ?Turing Cathedral: The origins of the digital universe? by George Dyson. It tells us why we had the vintage computer era - this can be found in my book, ?A Historical Research Guide to the Microcomputer.? (Shameful plug here!) - and what has evolved since. Murray--

12 years, 2 months

Minivac 6010

by brian＠ptubes.com

Hi -- friends of mine found an intact, in-box Minivac 6010 with manuals and wires etc in their mother's closet in Ohio. Just as a FYI for them, any info on valuation? I see virtually no trades of these in Google searches. tanks Brian

12 years, 2 months

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test-drb April 2012