test-drb

test-drb@ccmp.vtda.org

101090 discussions

by alhartman＠yahoo.com

If you can deal with Mailorder: http://www.affordablesurplus.com/syncom_floppy_diskette.asp And, Athana still seems to be selling them as well: http://www.athana.com/html/diskette.html Regards, Al Phila, PA > From: Warren Wolfe <wizard at voyager.net> > > Anyway, diskettes are going the way of the dodo. I have several > older machines, and spent a good part of the last two days trying, > unsuccessfully, to find 5-1/4 inch diskettes for sale. They simply are > not carried any more. And, I live in the heart of a truly major retail > center -- I've been in EVERY major computer and electronics store, and > many of the minor ones in the last 48 hours. >

19 years, 6 months

Apple-1 History?

by ken＠seefried.com

From: "Dave Dunfield" <dave06a at dunfield.com> > >I've been having an esclating correspondance with a chap named >"Murray Balascak" (anyone know him?) - > The following might come as a suprise: There are trolls on the internet. There are psychos on the internet. There are irrational, obsessive, socially retarded, self-important fanatics on the net. Sometimes, one of them finds you, and makes you the subject of their current delusion. They're easy to identify, and it's best not to have "escalating correspondence" with them. > >I should probably just ignore it - > Bingo.

19 years, 6 months

KIM and SSM 6502 - Chuck Guzis

by jack.rubin＠ameritech.net

Responding to Chuck Guzis - > > (BTW, I still have a 2708 EPROM burner for a KIM-1 if anyone wants > it.) yes, please, if still available! > I'm trying to remember if it was Solid State Music who > offered the S- 100 6502 board. Does anyone recall? > I don't think SSM ever did a 6502 S100 board - the only one I know about is from CRGS in Pennsylvania. Jack -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.432 / Virus Database: 268.15.15/580 - Release Date: 12/8/2006 12:53 PM

19 years, 6 months

KIM-1 and Apple I

by jack.rubin＠ameritech.net

If you haven't read the previously un-published Chapter 1.5 of Brian Bagnall's Commodore history, take a look here - http://www.commodorebook.com/contents/ch001.5%20TIM-KIM.pdf . No doubt the KIM was a significant and capable system but, IMHO, the real difference was intent - Chuck Peddle saw the KIM as a way to entice engineers into trying and buying his processor; Woz saw the Apple I as a true personal computer, though obviously that had a different meaning in 1976 than it did in 1981 or 2006. The KIM-1 had a tremendous impact (relatively speaking) because it provided a working system (or subsystem) with a common and reliable hardware configuration to 100s/1000s of people. The result was an early critical mass encouraging third party vendors (hardware and software) and the development of an enthusiastic user community. The Apple I never sold in any appreciable volume and may have been most important as an "enabler", validating Woz - to himself! - as a capable designer and validating Jobs - to himself! - as a visionary, though it would seem that Paul Terrell (and certainly Mike Markula) shared that vision as well. Terrell's financial commitment to Apple allowed Woz to build something much closer to his view of what he wanted - the Apple ][. My ][ cents - Jack -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.432 / Virus Database: 268.15.15/580 - Release Date: 12/8/2006 12:53 PM

19 years, 6 months

A 1935 example of the internet.

by swtpc6800＠comcast.net

Hugo Gernsback started the magazines that became Popular Electronics and Radio Electronics. He was known for his predictions on the future of electronics. In the February 1935 issue of Radio Craft (later Radio Electronics) he describes in some detail a future home radio that includes television and electronic delivery of the newspaper. It appears to allow two way communication. There is a copy for sale on ePay that shows the cover and some internal pages. RADIO CRAFT 1935 MAGAZINE PREDICTS FUTURE RADIO in 1950 Item number: 170058678360 Michael Holley www.swtpc.com/mholley

19 years, 6 months

Apple-1 History?

by alhartman＠yahoo.com

Dave, Seems perfectly fine and reasonable to me. You are dealing with a troll. I'm sure the KIM-1 is a fine computer, but it's not terribly well known except to early computing aficionados. I think you should ignore him. Your Apple II page is fine. The text is fine. It's truthful and relevant to the history of the Apple II. And thanks for providing the resources and great computing you do! Regards, Al Hartman Phila, PA > From: "Dave Dunfield" <dave06a at dunfield.com> > > Hi guys, > > I've been having an esclating correspondance with a chap named > "Murray Balascak" (anyone know him?) - who contacted me regarding > his displeasure with my mention of the Apple-1 on the Apple-II page of > my site - here is what I have posted as part of my introdiuction to the > Apple-II: > > -------------------------------------------------------------------------------------------------- > In 1976, Steve Wozniak and Steve Jobs formed the Apple Computer Company, > and built a home computer they called the "Apple 1" in their garage. Although it > required the users to provide their own cabinet, power supply, keyboard and > video monitor, it didn't require a separate terminal, and a simple BASIC interpreter > could be loaded with an optional cassette interface. Although it required a fairly > technical user to complete the system and make it usable, about 200 Apple 1s > were sold in the first year. > > The following year (1977), Apple refined the design, providing a keyboard and > power supply and packaging the machine in a attractive low-profile plastic cabinet > with simple connections for the video monitor and tape storage. Now - anyone > who could plug two connectors together could use this computer. The result, called > "Apple 2" was one of the most successful early personal computers, and sold > many thousands of units. > ------------------------------------------------------------------------------------------------- > > In Mr. Balascaks first correspondance, he stated that the KIM-1 was a far > better machine than the Apple-1, asked if I had succumbed to "the relentless > revisionism of the brand zealots?", and demanded that I "correct the above > reference to show the machine's irrelevance". > > In his second correspondance, he stated that I am spreading "Apple > propaganda", again stated that the KIM-1 was better, sold in higher > quantities and cheaper (I still do not know what the KIM-1 has to do > with an Apple-II page). > > In his third correspondance he acqused me of "posting lies and being > worse than useless by corrupting history into fiction". Again, he stated > that the KIM-1 was a far better machine and much cheaper. > > In his last email, he indicated that he believes I am responsable for the > degradation of the internet and the reason that it cannot be trusted as > a source of information. > > I don't know where this is coming from - I believe my reference to the > Apple-1 is accurate considering it's brevity - Apple was formed in 1976 > and operated out of Jobs basement. The Apple-1 was sold through the > homebrew computer club as well as a few of stores, and although I do > not have confirmed numbers of sales, I believe it was around 200 > units. > > It was never my intention to make a page about the Apple-1 (I don't have > one, and I only feature systems on my site which are in my collection)... > I believe at some point someone asked why I didn't mention the Apple-1 > so I added this one paragraph as part of the Apple-II history. I have no > other references to the Apple-1 (at least that I can recall) on my site. > > In all of my responses to him, I indicated that I am unwilling to change > the site based on the hearsay of one individual, especially when that > person has an apparent (in my opinion based on correspondance > received) bias for or against the material being questioned, however I > would be happy to revise the site in response to any documented > facts/evidence he can provide that the material I have is incorrect. > > All I have received in return is statements about how much better the > KIM-1 was (I make no such comparisons on my site), how expensive > the Apple-1 and Apple-II were (I post no such prices on my site), and > rants about a website that apparently lists Woz as the "inventor of > the single-board computer" (I make no such claim on my site). > > I should probably just ignore it - but the fact that I have been accused > of lying and deliberatly posting misinformation is disturbing to me ... > So - I throw it to the list - As a background statement showing that > Apple existed and sold a predecessor in small volumes for a time > before the Apple-II ... Is my posting above non-factual? If so, in > what way, and can you provide supporting documentation? > > Please keep in mind that I do not wish to post a page about the Apple-1, > only a single paragraph as a way of introducing the guys who built > the Apple-2. > > Regards, > Dave > > -- > dave06a (at) Dave Dunfield > dunfield (dot) Firmware development services & tools: www.dunfield.com > com Collector of vintage computing equipment: > http://www.classiccmp.org/dunfield/index.html > > > ------------------------------

19 years, 6 months

magic-1 boards

by dgriffi＠cs.csubak.edu

I'm attempting to build a Magic-1 using gEDA. Would anyone be interested in a set of boards for the Magic-1? I'm just pondering the idea right now. -- 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?

19 years, 6 months

ARC boards

by jim＠g1jbg.co.uk

I have a quantity of ARC(E) Ltd. boards, from a complex calculator, or small computer. They are in CHesham, Bucks, UK, collection only. A small donation would be welcome, but I'm not that bothered. There are a couple of largish boxes of the things. They go for scrap in acouple of weeks, if not claimed. Jim. Please see our website: www.g1jbg.co.uk

19 years, 6 months

ARC boards

by jim.beacon＠ntlworld.com

I have a quantity of ARC(E) Ltd. boards, from a complex calculator, or small computer. They are in CHesham, Bucks, UK, collection only. A small donation would be welcome, but I'm not that bothered. There are a couple of largish boxes of the things. They go for scrap in a couple of weeks, if not claimed. Jim. Please see our website: www.g1jbg.co.uk

19 years, 6 months

Stiction

by g-wright＠att.net

-------------- Original message ---------------------- From: "Chuck Guzis" <cclist at sydex.com> > On 8 Dec 2006 at 10:43, Marvin Johnston wrote: > > > I've read several replies indicating that the drive needs to be taken apart. > > People have also advocated just "hitting" the drive to break the stiction. > > I don't think what some of the folks were talking about was > "stiction". It seemed as if the positioner itself were stuck. IIRC. > In the case of stiction, the spindle motor itself cannot overcome the > adhesion between the platters and the heads, so the drive never spins > up. > > I've got an SA-4008 that I'm wondering about--obviously the spindle > motor spins the platters up to speed, but the drive doesn't come > ready (it did about 5 years ago when I last powered it). I'm > wondering if there's a stuck positioner issue on that one. Anyone > have any ideas? > > Cheers, > Chuck > I have seen may of the older drives have the rubber on the head position stops go bad and hang up the head position or cause it to stick. I have been daring and opened up the drive to clean it off. if this is the problem it can of coarse trash the drive if it gets off the stop post. Cleaning is on easy and takes some time. The next challenge is getting something to replace it with out taking the drive apart. (head alignment.) On some Quantumn 8" dives I spilt some tubing and rapped it around the post with contact glue. So far they still work Jerry Jerry Wright JLC inc.

19 years, 6 months

Looking for old VMS and Ultrix releases

by sethm＠loomcom.com

Folks, I'm trying to hunt down old VAX/VMS releases (earlier than 5.4) and old Ultrix and ULTRIX-32 releases (earlier than 4.2, both for VAX and for RISC). Tape images or CD-ROM images (where appropriate) would be quite welcome, I don't need any original media. If you have any of this stuff lurking around, please do let me know. Thanks very much! -Seth

19 years, 6 months

Kinda OT: LASCRs?

by mcguire＠neurotica.com

Hey folks. As a kid in the 1970s with access to only Radio Shack for parts and educational materials, I had a lot of Forrest Mims' books. I've dug up a lot of the ones learned from (new copies via eBay; my original ones are sadly long gone) and in fits of nostalgia I've built quite a few of the old circuits I played with when I was 8 or 9. One component that I really liked was the LASCR. I had one which I used in a few different circuits back then. While I still have some of my old stuff from that era, that one LASCR is nowhere to be found...Now it seems they've disappeared from the scene entirely. Has anyone seen any lately? Is anyone making them anymore? -Dave -- Dave McGuire Cape Coral, FL

19 years, 6 months

Apple-1 History?

by aliensrcooluk＠yahoo.co.uk

--- Dave Dunfield <dave06a at dunfield.com> wrote: > Hi guys, > *>> snip <<* > > I should probably just ignore it - but the fact th at > I have been accused > of lying and deliberatly posting misinformation is > disturbing to me ... > So - I throw it to the list - As a background > statement showing that > Apple existed and sold a predecessor in small > volumes for a time > before the Apple-II ... Is my posting above > non-factual? If so, in > what way, and can you provide supporting > documentation? > > Please keep in mind that I do not wish to post a > page about the Apple-1, > only a single paragraph as a way of introducing th e > guys who built > the Apple-2. > > Regards, > Dave > Sounds perfectly reasonable to me and, whilst have I no knowledge about the A1's sales figures, the other fact's all seem to be correct. I seem to recall reading about the Apple 1 in either one of my 80 Microcomputing mags or, possibly more likely, the book On The Edge: The Spectacualr Rise and Fall Of Commodore (published last year). Personally, I think it's good to mention rival computers and/or previous models when talking about specific computers. I can see nothing wrong with what you have put and can only say that you have unintensionally rattled a KIM-1 fan. Regards, Andrew B aliensrcooluk at yahoo.co.uk

19 years, 6 months

ASR-33 conversion to 220V

by jos.mar＠bluewin.ch

I want to convert a ASR33 from 110V/50Hz ( yes , 50Hz) to 220V. Is it sufficient to swap the motor and fuses ? A nice touch of this particular machine is the unused "here is" option. I wonder if a small bootloader would fit in it... Jos Dreesen

19 years, 6 months

F/S PDP-11/34 CAD$100 Local pickup only Kanata/ON/Canada [SOLD]

by root＠parse.com

My goodness that was fast :-) The cabinet is still available... Cheers, -RK Forwarded message: > From cctech-bounces at classiccmp.org Fri Dec 8 09:36:31 2006 > From: Robert Krten <root at parse.com> > Message-Id: <200612081417.kB8EH8ci082567 at amd64.ott.parse.com> > To: cctech at classiccmp.org > Date: Fri, 8 Dec 2006 09:17:08 -0500 (EST) > X-Mailer: ELM [version 2.5 PL6] > MIME-Version: 1.0 > Content-Type: text/plain; charset=us-ascii > Content-Transfer-Encoding: 7bit > X-Virus-Scanned: ClamAV version 0.86.2, > clamav-milter version 0.86 on keith.ezwind.net > X-Virus-Status: Clean > X-Spam-Status: No, score=0.1 required=4.0 tests=FORGED_RCVD_HELO > autolearn=failed version=3.0.2 > X-Spam-Checker-Version: SpamAssassin 3.0.2 (2004-11-16) on keith.ezwind.net > X-Mailman-Approved-At: Fri, 08 Dec 2006 08:33:20 -0600 > Subject: F/S PDP-11/34 CAD$100 Local pickup only Kanata/ON/Canada > X-BeenThere: cctech at classiccmp.org > X-Mailman-Version: 2.1.5 > Precedence: list > Reply-To: "General Discussion: On-Topic Posts Only" <cctech at classiccmp.org> > List-Id: "General Discussion: On-Topic Posts Only" <cctech.classiccmp.org> > List-Unsubscribe: <http://www.classiccmp.org/mailman/listinfo/cctech>, > <mailto:cctech-request at classiccmp.org?subject=unsubscribe> > List-Archive: <http://www.classiccmp.org/pipermail/cctech> > List-Post: <mailto:cctech at classiccmp.org> > List-Help: <mailto:cctech-request at classiccmp.org?subject=help> > List-Subscribe: <http://www.classiccmp.org/mailman/listinfo/cctech>, > <mailto:cctech-request at classiccmp.org?subject=subscribe> > Sender: cctech-bounces at classiccmp.org > Errors-To: cctech-bounces at classiccmp.org > > > Hi folks, > > I've decided that my PDP-11/34 is not part of my core collection, and that > I really won't have time to do anything intelligent with it. Therefore, > I'm selling it for CAD$100, local pickup in Kanata/ON/Canada only > (will not ship). Pictures, module inventory, and contact info: > > www.parse.com/~museum/pdp11/pdp1134/index.html > > The pictured cabinet is available separately (CAD$100, same terms). > > (The Gandalf X.25 mux shown in the cabinet has been scrapped already.) > > Cheers, > -RK -- Robert Krten, PARSE Software Devices, http://www.parse.com/resume.html Wanted: DEC minis: http://www.parse.com/~museum/admin/wanted.html

19 years, 6 months

What would it take...

by lee＠geekdot.com

> to make one of these in discrete logic: > (if you don't feel like looking, it's an Apple II > IDE/Cflash controller) > Just a rough chip count. Two 8 bit buffers, two 8 bit latches and one GAL20V8 or similar. The GAL isn't essential but saves four or more packages to do the address decoding. Lee.

19 years, 6 months

TCP/IP, FTP, and MSDOS?

by julesrichardsonuk＠yahoo.co.uk

Out of interest, what do I need in the way of TCP/IP software / configuration and FTP client software so that I can connect to a remote FTP server from MSDOS? I don't think I've ever set up such a config from scratch. I can live with 10Mbps speeds if required (would DOS drivers even drive a card at anything more anyway?) NIC cards I seem to have available: Netgear FA310TX (PCI) HP 88809L (ISA) 3Com Etherlink III (PCI) 3Com Etherlink III (ISA) Asix NV100AM (PCI) 'Network Everywhere' NC100 (PCI) 3Com 3C905 (PCI) The ISA boards perhaps have the drawback that they're software configurable, so I have no idea what settings they'll want to use (or which interface), or how well they'll behave in the new-ish system I need to put a card in. The PCI boards on the other hand are newer so maybe DOS drivers don't even exist for them... (Etherlink III's were always reliable I seem to recall, but I never did like the idea of them being software configurable; it was much nicer to have jumpers on a card and *know* what it was configured as!) cheers Jules -- there's a carp in the tub there's a carp in the tub so nobody's taken a bath

19 years, 6 months

Looking for LC/Performa 550 mo'bo', 8*24*GC NuBus card

by spectre＠floodgap.com

I'm looking for a replacement Mac LC 550 (Performa 550, Color Classic II) motherboard. I'm also looking for an 8*24*GC NuBus video card. If you have either or both of these and are willing to part with/sell them, please let me know off list. Thanks! -- --------------------------------- personal: http://www.armory.com/~spectre/ --- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com -- Ah, the insight of hindsight. -- Thurston N. Davis -------------------------

19 years, 6 months

Wanted: Pertec-to-Qbus Tape Controller; RLV12 RL02 Controller

by vaxorcist＠googlemail.com

Help! I need a Pertec-to-QBus Tape Controller for my Cipher F880 tape drive. Any make & model will do: - DEC TSV05 controller M7196 - Emulex TC & QT series - Dilog DQ series - ... Furthermore I'd like to have an RLV12 RL02 Disk Controller (M8061). Will swap for other QBus boards or pay as much as a hobbyist can afford. Regards Ulli

19 years, 6 months

F/S PDP-11/34 CAD$100 Local pickup only Kanata/ON/Canada

by root＠parse.com

Hi folks, I've decided that my PDP-11/34 is not part of my core collection, and that I really won't have time to do anything intelligent with it. Therefore, I'm selling it for CAD$100, local pickup in Kanata/ON/Canada only (will not ship). Pictures, module inventory, and contact info: www.parse.com/~museum/pdp11/pdp1134/index.html The pictured cabinet is available separately (CAD$100, same terms). (The Gandalf X.25 mux shown in the cabinet has been scrapped already.) Cheers, -RK -- Robert Krten, PARSE Software Devices, http://www.parse.com/resume.html Wanted: DEC minis: http://www.parse.com/~museum/admin/wanted.html

19 years, 6 months

Machine Independent Storate Idea...

by tim.walls＠snowgoons.com

Jules Richardson wrote: > Maybe; but it's not vital to operation as the intention would be for the > primary storage to be something like a CF card or a USB stick. Although > that is interesting; the primary store is a USB stick then it's > presumably easy to code the firmware so that the device can be plugged > in via a cable to a system running suitable host software as an > alternative (providing the device holds sufficient local memory to > buffer a track and USB data transfer to the host is > fast enough to not upset whatever the floppy emulator's plugged in to). Unfortunately that's not true :-(. USB is a horrible standard, and it's not orthogonal - hosts are hosts, and targets (my word, I can't remember what the official word is) are targets. So, if your device wants to be able to use USB memory sticks, it needs to implement the USB host interface. That means it won't be able to talk to a computer (also a host interface.) If you want to do both, you'll need two interfaces (and strictly speaking two sockets - the flat socket (Type A IIRC) should only be implemented on a host, a target should only have the square Type B socket. It ought to be impossible to get a flat-4 male to flat-4 male USB cable, apart from anything else.) (By 'Flat 4' I mean the 'normal' USB socket people see on their computers. By 'Square', I mean the square one with two bevelled corners that you don't see as often (an awful lot of USB devices having captive cables.) You can probably find a driver chip that will implement both host and target though, or you may need two driver chips. The Philips PDIUSBD12 (again, IIRC that's the correct name) which is the only one I've ever used will only do target mode, IIRC. Firewire is a much nicer standard for this sort of thing, but of course defeats the object because noone makes Firewire memory sticks :-). Anyway, I'd definitely stick to CompactFlash, but make sure you implement a Type-II (IIRC, again!) interface, the physical size of which is slightly chunkier; that allows you to use the Microdrive harddisks as well as Flash cards. (To sort of answer one of your other questions, I regularly use 4GB CompactFlash hard disks in my digital camera - the only downside of them is they are sloooooooow, at least the cheapo ones I use. It used to be the cheapest way to get a 4GB compact flash hard disk was buy an iPod Mini, crack the thing open and steal the hard disk out of it - they use a CFlash disk internally!) Cheers, Tim -- Tim Walls at home in Leeds EMail & MSN: tim.walls at snowgoons.com

19 years, 6 months

pdp-8 3 cycle data break?

by brad＠heeltoe.com

Are there any good *detailed* descriptions about how the 3 cycle data break works on say, a pdp-8/I with an rf08 or df32? I've read 3-4 simple descriptions, but I'd like something that relates - in detail - to the cpu instruction cycles/states (i.e. f0-3,d0-3,e0-3). I'm curious what the exact state machine looks like. I'm also curious if the data break cycles occur as additional cpu states or if they overlap cpu states in any way. I'm resisted diving into schematics mostly due to lazyness (and work), but that may be the next step. I guess I have no seen any good 8/i "principles of operations" either, outside what is said in "Computer Engineering". any pointers/comments appreciated. -brad

19 years, 6 months

What would it take...

by chrism3667＠yahoo.com

to make one of these in discrete logic: (if you don't feel like looking, it's an Apple II IDE/Cflash controller) http://cgi.ebay.com/MicroDrive-IDE-Controller-for-Apple-IIe-IIgs_W0QQitemZ3… Just a rough chip count. ____________________________________________________________________________________ Cheap talk? Check out Yahoo! Messenger's low PC-to-Phone call rates. http://voice.yahoo.com

19 years, 6 months

PDP11 adventures

by curtis＠hawkmountain.net

OK... so I'm now the new (proud :-) ) owner of a PDP-11/83. I'm new to the PDP11s, so, I'm not even powering this thing up until I get educated. This is the config In the system (183QA-D2) box: M8637-EF (2MB ECC RAM) M8190-AE (11/83 CPU, FPJ11-AA) X, M9047 (nothing, grant continuity) M7196 (TSV05 controller) M7555, M9047 (RQDX3 MFM Winchester/floppy, grant continuity) M7513, M9404 (RQDXE RQDX extender for RQDX2/3, Q22 extender cpu end) X (nothing) X (nothing) In the BA23-CA expansion: M9405-YB, M9047 (Q22 extender far end, grant continuity) M8053-MA (RS232/423 w/DDCMP) M3104 (8 line ASYNC multiplexer) M3104 (8 line ASYNC multiplexer) M77651, M7555 (DRV11-WA 18/22 bit dma general purpose parallel interface, RQDX3) M7651, M7546 (DRV11-WA, TKQ50-AA TMSCP for TK50 controller) X (nothing) X (nothing) I recieved this with 1 TK50 drive in the BA23, no hard drives (I have a decent selection of MFM drives, but if anyone has any spare Maxtor XT2190 or XT1140s let me know). Anyone got any DEC drive sleds ? I could use 4. Also have a 'port panel' that wen on the rear of the rack these two boxes were pulled from... and a large cache of ribbon cables to connect everything up. Now... for questions: is FPJ11-AA floating point, and does that mean my cpu card has that built in ? What is the max ram ? i.e. how many more M8637-EF (or higher capacity) cards can be aquired and put in ? Anyone have a TSV05 tape drive local to Sharon, MA ? Or, anyone in need of a TSV05 controller ? What is DDCMP control ROM ? that my M8053-MA has ? What is a DRV11-WA general purpose 18/22 bit parallel interface ? Can this be used for a parallel printer ??? As I'd like to have larger storage on it at some point, I'd like to locate a SCSI (or possibly ESDI ?) controller. What should I be looking for, anyone have one ? I'm looking at running BSD (2.11 ?) and other PDP11 OSes... suggestions ? There doesn't seem to be a reason to the layout of the grant continuity cards. Shouldn't there be one in the left side of the 3rd slot from the top in the 183QA-D2 (system unit) ? What is the minimum card config to start testing with ? Any pointers on how the RQDX3 and RQDXE cards should wire up ? The RQDXE in the system unit has a wide ribbon cable running to the front (which I presume breaks into the control/data wiring for an MFM drive there).. but the RQDX3 doesn't connect to the RQDXE .. Sorry for the long post... I'm new to PDP11... Oh.. last thing... does anyone local to Sharon, MA 02067 have a 'proper' DEC RAC enclosure the is 'correct'/'period' for a PDP-11/83 ? (not full size please... this 11/83 is in my 2nd floor computer room... I currently do not want a full height 19" rack in there... something deskside size plz). Thnk that covers it for now. Thanks in adance everyone, -- Curt

19 years, 6 months

Help needed in identifying an early IC

by jack.rubin＠ameritech.net

I've come across a few old ICs and haven't been able to find out much about them - lots of places on the 'net are willing to sell them but I couldn't find a data sheet - only one clue that they _might_ be dual op-amps. They are small cans (TO-??) with eight leads protruding from the bottom, marked SG 1458T with a 1976 date code. Any help identifying them would be appreciated. Kind of hoping they're really some sort of shift register ... Thanks, Jack -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.432 / Virus Database: 268.15.9/573 - Release Date: 12/5/2006 4:07 PM

19 years, 6 months

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test-drb