- test-drb@ccmp.vtda.org - classiccmp.org

by shawn-gordon＠cox.net

so, what is easier to read and write? IF STRING1 = STRING2 or if !(strncmp(string1,string2,10) { I've rewritten cobol into C a few times when I was a big enthusiast of C and the C code was longer and harder to maintain. On 2/17/2015 1:29 PM, John Foust wrote: > At 01:02 PM 2/17/2015, Ethan Dicks wrote: > >> What I read horrified me. How could anything be that mind-crushingly >> verbose? >> > As compared to purposefully terse C one-liners? :-) > > - John > > > >

11 years, 4 months

7
8
0 0

Rich kids are into COBOL

by cclist＠sydex.com

My stars and garters--I just noticed the following article posted back in September that college students learning COBOL make more money: http://readwrite.com/2014/09/17/cobol-programming-language-hot-or-not Really? --Chuck

11 years, 4 months

25
46
0 0

WANTED: Computer to rent for a movie

by tosteve＠yahoo.com

I reccived this message from Jose - they want to rent 1980s computers for a movie.?They are located near Montreal, I think. Please respond below: ---------------------------------------------------------------------------------- I'm working on a feature film for Fox Entertainment, in Canada and we are looking for computers dating back to 1983. Ii was wondering if renting some of them would interest you. Thank you. Best regards. -- Jose Varela jfvarela at me.com 514 756 5699 Fox Quebec Productions 1777, Carrie Derick, 3e etage, suite 311 Montreal, Quebec H3C 6G2 ?514 613 5852?

11 years, 4 months

3
2
0 0

Cat weasel Yahoo Group reclaim

by jws＠jwsss.com

I set up a poll to select a moderator to replace the inactive moderation on the Catweasel group. I know the owner / creator is probably on here, and I am doing this per Yahoo instructions to get rid of the spam. I'm posting here briefly as I'm sure a lot have filtered out the group due to the spam. Here is the poll link: https://groups.yahoo.com/neo/groups/catweasel/polls/poll/3206349?pollType=E… The information about this is in a couple of messages on the Yahoo groups site. This is partly an effort to salvage the Catweasel group there, and partly an effort to see if Yahoo customer service follows thru. So far they are communicating with me. I'll let you all know how it goes. I'll end the poll for a new moderator around the end of February, per their suggestion. Thanks Jim

11 years, 4 months

2
1
0 0

confirm 0c60d0dc1a8d8488f744c3297b5450c6019d9dc6

by abuse＠cabal.org.uk

On Wed, Feb 18, 2015 at 08:06:14AM -0600, cctalk-request at classiccmp.org wrote: > Your membership in the mailing list cctalk has been disabled due to excessive > bounces The last bounce received from you was dated 18-Feb-2015. You will not > get any more messages from this list until you re-enable your membership. You > will receive 3 more reminders like this before your membership in the list is > deleted. These automatic unsubscriptions are getting tedious. I'm not bouncing cctalk mail, but I *am* bouncing all mail from cctech since I never subscribed and the list software has ignored all reasonable efforts to unsubscribe. Evidently there's a misconfiguration somewhere that is linking the two lists like Siamese twins. I did drop Jay a line offering to look at and fix the configuration, but that mail seems to have vanished into the void along with my cctech unsubscription attempts. So, is there any way to receve cctalk and not cctech?

11 years, 4 months

5
4
0 0

WANTED: "Tech Pickers" to have their own TV show

by tosteve＠yahoo.com

I received this email from Mary - I myself have no personality LOL, perhaps you do?Please apply within: From: Mary Abramson <Mary.abramson at nutopia.com> My name is Mary Abramsonand I?m a Casting Producer at Nutopia. Currently we?re looking for a couple of guys that areespecially passionate about vintage tech to host a new show. I?d love to speakwith you about this project if you?re interested. Let?s set up a call, and thenpossibly a Skype interview. If not, please feel free to pass my contact info onto anyone you think might fit.?I?ve attached our companybio below, but please don?t hesitate to ask me any further questions. Lookingforward to hearing from you!?Sincerely,Mary Mary Abramson NY Casting Producermary.abramson at nutopia.com Cell: (917) 969-1537?www.nutopia.com

11 years, 4 months

1
0
0 0

Incandescent lights [Re: It's time to restore the 11/45.]

by kspt.tor＠gmail.com

On 14 February 2015 at 16:41, John Foust <jfoust at threedee.com> wrote: > They consume about 18 watts and have claimed life expectancies > in the 30,000 to 50,000 hour range. But, is this the kind of life expectancy where they include the hours when it's also powered off? Because that's what I have seen for some early LED lights - 20,000 hours total lifetime if you used it only 2.5 hours a day.. the rest of the day was included in the life time claim. Real life expectancy was thus only a bit more than 2000 hours, less than three months, which turned out to be pretty accurate in practice.

11 years, 4 months

2
1
0 0

Craig Solomonson posts the video he made to sell his Apple I back in 1996

by christian_liendo＠yahoo.com

It's interesting because he reads the letter he got from Apple talking about their support for the Apple I vs Apple II http://youtu.be/pCtHNWq8tjQ

11 years, 4 months

1
0
0 0

Equipment Available

by jwest＠classiccmp.org

In Sydney Australia. a PDP-11/03 (probably with an expansion chassis) and an RX01 drive, all in a lowboy "desk" cabinet. All front panel covers present. Cost details are not specific, but it appears to be "free to a good home". Owner will not ship, so local pickup only. If interested, please contact me off-list and I'll hook you up with the owner. Best, J

11 years, 4 months

1
0
0 0

EEPROM programmer for 68766

by roeapeterson＠gmail.com

I'm trying to upgrade my pdp11/23+. The new eeproms are 68766 24-pin 64kbit. Like an idiot, I assumed my minipro 6 ltl USB programmer could handle these, but I was wrong. Can anyone point me at a programmer that _can_ burn these? Thanks!

11 years, 4 months

3
2
0 0

Multi-node BBS'

by jplist2008＠kiwigeek.com

Gary's pulling up a BBS pushed me onto a wave of nostalgia so I've been digging through my old DOS archives of BBS software and the like that I picked up years ago and I came to a question. How did people set up multi-node BBS' back in the day? I know you could run something like Desqview and run multiple copies on a single system, and some BBS' (like TBBS) had built-in multitasking so it handled multiple modems. And, of course, you could get fancy and run a Novell network. Were there other ways of doing this? I also saw a random mention of multi-node Commodore BBS'. Given Commodores didn't network or multi-task, I'm curious if the author of the note was mistaken, or if such things existed -- and then how did they work? My thanks for helping with my flashback; - JP

11 years, 4 months

14
15
0 0

Rich kids are into COBOL

by mhs.stein＠gmail.com

Indeed; given the choice I think I'd much rather modify an old file-handling report-printing business program written in COBOL than most other languages... I mean, what could be simpler and more self-documenting: http://www.google.com/doodles/grace-hoppers-107th-birthday m ----- Original Message ----- From: "John Foust" <jfoust at threedee.com> To: <cctalk at classiccmp.org> Sent: Tuesday, February 17, 2015 4:29 PM Subject: Re: Rich kids are into COBOL > At 01:02 PM 2/17/2015, Ethan Dicks wrote: >>What I read horrified me. How could anything be >>that mind-crushingly >>verbose? > > As compared to purposefully terse C one-liners? > :-) > > - John > >

11 years, 4 months

2
1
0 0

Rich kids are into COBOL

by ethan.dicks＠gmail.com

On Tue, Feb 17, 2015 at 4:29 PM, John Foust <jfoust at threedee.com> wrote: > At 01:02 PM 2/17/2015, Ethan Dicks wrote: >>What I read horrified me. How could anything be that mind-crushingly >>verbose? > > As compared to purposefully terse C one-liners? :-) Life is more than [0-9A-Z.,:;/#$%!*<>()_-+] -ethan

11 years, 4 months

2
1
0 0

Rich kids are into COBOL

by jfoust＠threedee.com

At 01:02 PM 2/17/2015, Ethan Dicks wrote: >What I read horrified me. How could anything be that mind-crushingly >verbose? As compared to purposefully terse C one-liners? :-) - John

11 years, 4 months

1
0
0 0

11/23+ Console cables

by jnc＠mercury.lcs.mit.edu

> From: Roe Peterson > I've got a couple of kdf11s, but I have never been able to find the > bulkhead panel for one. Same here: that's why I posted that data; I figured people probably had 11/23+ boards that were 'unusable' because they didn't have the console cabkit. "Not any more", in the immortal words of Inspector Clouseau! :-) Noel

11 years, 4 months

2
1
0 0

Possible error in "Microcomputers and Memories" (1982 edition)

by jnc＠mercury.lcs.mit.edu

So the description of the SSR3 register in "Microcomputers and Memories" (1982), on pg. 284, apparently has an error. It describes bit 5 as "enables I/O mapping", but.... the QBUS 11's don't have any kind of I/O mapping that I know of. Or am I confused? Noel

11 years, 4 months

2
1
0 0

Non-512-byte sector drive cloning?

by b4＠gewt.net

All, I have the SC-40 home safe and sound. Before I go ANY further...I want to image the boot/microcode drives which aren't 512-byte sectors. What's the best approach? My options are a VAX netbooting VMS or netbooting NetBSD (install doable for that one.) Thanks! -- Cory Smelosky http://gewt.net Personal stuff http://gimme-sympathy.org Projects

11 years, 4 months

11
24
0 0

11/23+ Console cables

by jnc＠mercury.lcs.mit.edu

> From: Roe Peterson > Really? Really! :-) I can see a crystal on the cabkit, and if you look at the interface spec ('Microcomputers and Memories', 1982, pg. 628), it's clear it must use the External Clock for the baud rate to be switch selectable on the cabkit. > I always assumed the rotary switches just replaced the 4 bits from the > dipswitch. That is the case for the KDJ11-B, which is why I assumed the same thing was the situation with the 11/23+. But it's not... > Where can I find a schematic? Good question. I would assume in the 11/23+ print set, but I looked there, and couldn't find it. Maybe that print set (MP01236) is just for the CPU board itself, and there's some other print set for the larger system, including the cables, but I can't immediately think what I should look for. FWIW, the part number for the cabkit is 54-15422-01. (I think the 54- prefix means 'assembly', but I'm not sure. I should collect a list of all the DEC part prefixes - I looked, but there doesn't seem to be one.) Noel

11 years, 4 months

2
1
0 0

PDP-5 & PDP-8s on display

by quapla＠xs4all.nl

Googleing for something else, I came across the museum of the Dutch 'Hoogovens' steel melting & manufacturing plant (now called Tata steel). Apparently they have a PDP-5, a PDP-8s, a PDP-8e and a PDP-11/34 in their collection & display. Pictures can be seen at http://www.hoogovensmuseum.nl/collecties/computermuseum/ text is only in Dutch. Apparently the PDP-5 was the first process-computer in the Netherlands at that time (1965) and was used in the oxysteel division to analyse the steel for quality & contamination using spectral analysis. Ed -- Dit is een HTML vrije email / This is an HTML free email. Zeg NEE tegen de 'slimme' meter.

11 years, 4 months

3
2
0 0

Tadpole Sparcbook 2 OS media...

by derschjo＠gmail.com

Kind of a long shot, but hey. I've had this trusty old Sparcbook 2 for awhile now and I never did manage to track down any OS media for it. It's currently running a variant of SunOS 4.1.2 and the old 2.5" SCSI drives (plural) are still holding out, but I'd like to be able to revive it when they finally do go to silicon heaven. Anyone have anything for these machines? These are significantly different from the later Sparcbooks (which are considerably more Sun-compatible, hardware wise)... Thanks! Josh

11 years, 4 months

4
6
0 0

PERQ

by evan＠snarc.net

MARCH's PERQ-1 is missing the keyboard and control tablet. Does anyone have those that we could borrow, in order to bring up the system? We're looking to work on it in June this year.

11 years, 4 months

3
4
0 0

WTB/WTT: SGI O2 and Indigo² items

by mgariboldi＠gmail.com

Hello, As of late I've been looking for the following parts for the following SGI systems: - SGI Indigo? o video-graphics flat/flexcables (very important, need it); o IMPACT Video break-out cable; o IMPACT Video stand-offs (10); o IMPACT pull straps (3 sets, but 'just' 2 for HighIMPACT is also fine for me); o IMPACT Video screws (10 also, but not as important); o IMPACT "Digital Media CD" (... or if someone could tell me what's on there). - SGI O2 o blue optical (i.e. CD-ROM) drive bezel; o black top lid; o two or three disk sleds/brackets; o analog A/V (AV1) module (not too important). Interested to buy, but I have items to trade (compatible in/for SGI O3000-series, for instance; like 10-Gbit Ethernet NICs). Lastly, I'm located in the Netherlands. Thanks in advance. Kind regards, Marco

11 years, 4 months

1
0
0 0

hp 7970E mag tape mounting

by jwest＠classiccmp.org

My HP 7970E mounting bracket is at the fabricator, so hopefully copies will be ready soon. I'll keep the folks posted that asked for a bracket. That means if anyone wanted a mounting bracket but didn't respond to my earlier post, you need to let me know by end of day today. It is unlikely that another run will be done in the future. Separately - on the other side of the 7970E tape chassis are three metal shims. They are normally attached with glue to the back lip of the chassis edge where it mounts to the rack on the right side. I have noticed over time that on some drives one or more of these shims have come off and been lost. Another listmember (THANK YOU) fabricated a few of these shims. If you need these, I have a few extra that are available for the cost of mailing (aka $0.00). Once I run out of those few, perhaps the listmember that fabricated them would be willing to make a few more if there is a need. Best, J

11 years, 4 months

2
1
0 0

DEC MKA11 and/or M8261/M8163

by pbirkel＠gmail.com

I don't understand the role of the M8162 "Port MUX A module" and M8163 "Port MUX B module" that the field-guide claims to be part of the MK11. They aren't part of the MK11 as far as any documentation that I've read regarding it. At least the M8162 has a pair of 20ma-style SLU connectors on it, but no UARTs that I can see. Do these modules really belong to the MKA11, rather than the MK11? Or to something else entirely? Is the MKA11 (which I can't find documented online) a revised MK11? The field-guide seems to imply this given its entry for the M8164 which basically reads like this: M8158 MK11 U Address buffer module M8159 MK11 U Data buffer module M8160 MK11 U Control A module M8161 MK11 U Control B module M8162 MK11 U Port MUX A module M8163 MK11 U Port MUX B module M8164 MK11/MKA11 U Data buffer module (Replaces M8159) It seems to me that something is incorrect in the field-guide, but none of my researches have identified where the error is and what the right answer(s) might be. Anyone here have any experience/knowledge with/of the MKA11 and/or the M8261/M8163? Thank you, paul

11 years, 4 months

4
21
0 0

HP250

by mattislind＠gmail.com

On Ebay I found this HP250: http://www.ebay.de/itm/fur-Kenner-HP-250-Computer-Rechnersystem-ca-1980-kom… Looks like it is in good shape. The design is interesting with the keyboard integrated in the desk. Maybe something for someone in Germany to pickup?

11 years, 4 months

1
0
0 0

DEC MKA11 and/or M8261/M8163

by jnc＠mercury.lcs.mit.edu

> Umm, where is that? I just looked, couldn't find it online? Oops, never mind; for some reason Google barfed on the '_'. Noel

11 years, 4 months

1
0
0 0

DEC MKA11 and/or M8261/M8163

by jnc＠mercury.lcs.mit.edu

> From: Paul Birkel > Note that 1170mP_Jul77_text.pdf also includes some additional MKA11 > information, and improved diagrams. Umm, where is that? I just looked, couldn't find it online? (Clearly my Google-fu is pretty weak... :-) Noel

11 years, 4 months

1
0
0 0

looking for hp rack panel

by jwest＠classiccmp.org

I have an older (dark grey) HP rack that has a front door on it. The top 2/3rds of the door is closed off metal (dark cream color). The bottom 1/3rd is a dark brown/grey plastic vent. In the area that is vented, I'm missing one of the vent/slotted panels to fully close it off. I used to have a 7900A drive sticking through this opening, but no more (not in the current configuration being built). I'm building a machine to (hopefully) take to a VCF show, and would like to obtain another one of those vent panels to properly fill up the opening. Ideally, I'd like to buy/trade for one of those panels and keep it. But if you have one that you don't want to let go of, I'd at least like to borrow it for a few months for the show and then could return it. Does anyone have one of these plastic vent panels? Best, J

11 years, 4 months

1
0
0 0

Failed ICs and components

by hp-fix＠xs4all.nl

I made an inventory of the defective TTL?s I have, other than I initially though there is a reasonable spread over types and brands. Other than the NS DM7400 there are no types with an extensive failure rate. The list talks for itself. -Rik Type HP Number 1820- Quantity Brand CER Date 7495AN 1 Siemens 7417 8H08/74H08 1 ?? PCF7427 93L00PC 1 7302 9N03/7403 1 Fairchild 7328 DM7400N 14 National Semiconductor 352,422,424,401,351,435,315,215 DM7403N 4 National Semiconductor 315 DM7404N 5 National Semiconductor 317,315 DM7408N 2 National Semiconductor 307 DM7410N 2 National Semiconductor 308,217 DM74121N 6 National Semiconductor 313,315,314 DM74195N 1 National Semiconductor 241 DM7420N 1 National Semiconductor 211 DM7432N 2 National Semiconductor 314,413 DM7474N 5 National Semiconductor 435,349 DM7493N 1 Texas Instruments 7252 DM7495N 2 National Semiconductor 242,241 DM74H00N 1 National Semiconductor 334 DM74H08N 1 National Semiconductor 229 DM74L00N 1 National Semiconductor 337 DM74L04N 3 National Semiconductor 313,351 DM74L10N 1 National Semiconductor 423 DM74L74N 1 National Semiconductor 316 DM74L86N 1 National Semiconductor 317 DM74LS373N 1 National Semiconductor 8005 N8885A 1 Signetics 7402 N8T20N 1048 1 Signetics 7915 SN7400J 1 Texas Instruments 7313 SN7400N 2 Texas Instruments 7405,7335 SN7402N 1 Texas Instruments AS7419 SN7404N 3 Texas Instruments 7344,7402,AS7406 SN7406N 0471 1 Texas Instruments 8044S SN7407N 0668 2 Texas Instruments H7845,AS7414 SN74107N 2 Texas Instruments 7945B,7414 SN74121J 1 Texas Instruments X 7326 SN74123N 0579 4 Texas Instruments 7406,8014 SN74155N 2 Texas Instruments 7222 SN7416N 1 Texas Instruments AHA741 SN74191N 1 Texas Instruments M7628 SN74193N 3 Texas Instruments FF7606,FF7536 SN74193N 1 Texas Instruments 7516 SN7451N 1 Texas Instruments 7427 SN7474N 1 Texas Instruments 7339 SN7475N 1 Texas Instruments 7349 SN7493AN 1 Texas Instruments 7235 SN7493AN 1 Texas Instruments AS7344 SN7495AN 4 Texas Instruments BS7402,7227,7244 SN7495N 1 Texas Instruments 7401 SN7496N 1 Texas Instruments M7331 SN74H00N 1 Texas Instruments 7135 SN74H01N 1 Texas Instruments BS7423 SN74H01N 1 Texas Instruments 7252 SN74H04N 2 Texas Instruments 7527,AS7406 SN74H101N 2 Texas Instruments 7217,7336 SN74H108N 1 Texas Instruments 7205 SN74H40N 1 Texas Instruments 7510 SN74H74N 0512 1 Texas Instruments 7419 SN74L04N 2 National Semiconductor 218,313 SN74L42N 1 Texas Instruments 7312A SN74LS00N 1 Texas Instruments M7523 SN74LS03N 3 Texas Instruments 7945 SN74LS08N 1201 1 Texas Instruments 7801 SN74LS244N 1 Texas Instruments 8432B SN74LS257AN 1438 1 Texas Instruments 7927B SN74S04N 1 Texas Instruments UK7949 SN74S374N 2 Texas Instruments M7919X,F9022X 7400 0054 1 Motorola 7315 7410 0068 2 Motorola 7245,7443 7473 0075 1 National Semiconductor 217 7474 0077 2 National Semiconductor 212 74H08 0141 6 National Semiconductor 228,217,604,229,228 MC3001 0141 1 Motorola 7326 7404 0174 1 National Semiconductor 543 7405 0175 1 National Semiconductor 037M 7405 0175 1 National Semiconductor 947 MC3003 / 74H32 0205 1 Motorola 7513 74121 0261 1 Texas Instruments 7410 74121 0261 1 National Semiconductor 425 7403 0269 4 National Semiconductor 345,428 CA3028A 0306 1 National Semiconductor 413 7402 0328 2 National Semiconductor 527,532 7402 0328 1 Motorola 7248 74H00 0370 1 Motorola 7413 74H00 0370 1 Fairchild 7237 74H40 0376 1 Motorola 7334 74H04 0424 1 National Semiconductor 231 7408 0511 6 Fairchild F7421,F7407,F7409,F7428 7413 0537 1 National Semiconductor 533 74L00 0583 1 National Semiconductor 521 74L02 0584 3 National Semiconductor 222,231 74L10 0587 1 National Semiconductor 514 74L30 0589 1 National Semiconductor 232 74L54 0591 1 National Semiconductor 521 74L74 0596 1 Fairchild X SL3459 74L86 0598 3 National Semiconductor 405 9322PC 0616 1 Fairchild 352 9322PC 0616 1 Fairchild X 7221 9324PC 0706 1 Fairchild 7735 9328PC 0741 2 Fairchild X 7240,7309 74C175 1562 2 Signetics L147,B104 74C175 1562 1 National Semiconductor 011 -----Oorspronkelijk bericht----- Van: "Kyle Owen" < <mailto:kylevowen at gmail.com> kylevowen at gmail.com> Verzonden: ?11-?2-?2015 23:57 Aan: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Onderwerp: Failed ICs and components I am writing my master's thesis on accelerated life testing and would like to get a collection of parts to decap and experiment on. What prompted my study is a failed 7474 dual flip-flop in a PDP-8/E. As I later read (on here, I believe) was that the 7474s seem to fail in higher number than other 7400-series ICs. Is this because of a design flaw? I'm not sure (yet), but would like to find out. More recently, I saw a 680k 2W carbon resistor that read 1.3 meg out of circuit. As it turns out, it was in a high voltage portion of the circuit, and I suspect that electromigration caused its failure over time. Many of you are probably already aware that carbon resistors tend to increase in value as they age, though there are a few explanations too for that behavior, as I understand it. I would like to tie all of this together by researching older accelerated life testing schemes, examine how those parts actually fared, and see how current day models might be improved. If anyone has a collection of dead ICs (preferably those that have died inexplicably, and not by extreme overvoltage, for instance), I would like to talk to you about getting a few. If they are 7474s from Texas Instruments, ca. early 1970s, even better! Thanks in advance, Kyle

11 years, 4 months

1
0
0 0

DECwriter LA12 "correspondent" key

by dave＠661.org

I have an LA12 that's mising the "DATA/TALK" key. Does anyone have or know of a junked LA12 keyboard from which I can take that key? Failing that, would a VT100 key physically fit? How about 3D-printing the key? -- David Griffith dave at 661.org 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?

11 years, 4 months

1
0
0 0

DECwriter LA12 "correspondent" key

by dave＠661.org

I have an LA12 that's mising the "DATA/TALK" key. Does anyone have or know of a junked LA12 keyboard from which I can take that key? Failing that, would a VT100 key physically fit? How about 3D-printing the key? -- David Griffith dave at 661.org 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?

11 years, 4 months

1
0
0 0

Working Commodore 65 on eBay

by jnc＠mercury.lcs.mit.edu

> From: Glen Slick >> "jwsmobile" <jws at jwsss.com> wrote: >> Mr. 544 feedback is being trolled by 0 and 1 feedback idiots. > Ended at just under $23K USD Interestingly, although the winning bidder was pushed up an extra 1K by one of those feedback-1 trolls, there were a couple of real bidders right underneath them. So that price is _basically_ real; three people all felt it was worth roughly that. It's so bizarre, the way some stuff is in such demand, and other stuff is basically totally unwanted. I told this guy: http://www.ebay.com/itm/221685737714 there was no way he'd get that much for that set of cards, and he was like 'but some of this old computers stuff is going for a ton of money'. I was like, 'For things which are in short supply, and in demand, yes; neither of those is true of M8044/M8045's....' (Although for them, it's understandable; there are plenty of higher-density QBUS memory cards going for not much.) Noel

11 years, 4 months

1
0
0 0

proper chemical / glue for 11/45 switch repair?

by anders＠abc80.net

> Message: 27 > Date: Sun, 15 Feb 2015 15:24:13 +0000 > From: tony duell <ard at p850ug1.demon.co.uk> > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Subject: RE: proper chemical / glue for 11/45 switch repair? > Message-ID: > <A8192EF71C5C4946A240D25EDC8F9448027B4533 at EXMBX16.thus.corp> > Content-Type: text/plain; charset="us-ascii" > > >> An -11 owner would be able to say for certain, but the old model >> airplane solvent glue was methyl chloride. It's also in a lot paint >> stripper as well. "Tenax" model glue is a name that comes to mind. > > In the UK, dichloromethane (same stuff) is sold under the brand name > 'Plastic Weld', It is _by far_ the best way of mending plastics that it > will > disolve. And I think DEC front panel toggles fit into that category. > > That said, trying to glue the pivot pins back on to the toggle is going > to be (IMHO) a waste of time. The area is just so small. Personally, I > would > drill through the toggle (make sure it's in the exact right direction) and > put > a metal pin through. > > -tony It has been done! I did it on my switches on the old 8/L. http://www.abc80.net/zz/pdp8/DSC_9858.JPG http://www.abc80.net/zz/pdp8/DSC_9864.JPG http://www.abc80.net/zz/pdp8/DSC_9865.JPG I used the core from a copper wire 1,5mm2 since the diameter turned out to be perfect. /Anders

11 years, 4 months

2
1
0 0

Working Commodore 65 on eBay

by glen.slick＠gmail.com

On Feb 13, 2015 9:58 AM, "jwsmobile" <jws at jwsss.com> wrote: > > > On 2/13/2015 8:01 AM, Geoffrey Oltmans wrote: >> >> I presume I can't be the only one watching this eBay auction in disbelief. >> I'm wondering if this is a museum or not. Presumably a private collector >> would not have such deep pockets, but you never know! >> >> Over $13k USD and still a little less than 2 days to go! >> > Ultra-rare-Commodore-65-C65-DX64-prototype-working-serial-22 > > http://www.ebay.com/itm//171673209321 > > Mr. 544 feedback is being trolled by 0 and 1 feedback idiots. One has to wonder. > > I wouldn't use this auction as a reference in an appraisal. > > Jim Ended at just under $23K USD (?20,050)

11 years, 4 months

2
1
0 0

proper chemical / glue for 11/45 switch repair?

by jacob.ritorto＠gmail.com

Hi, One of the bit flip switches on my 11/45 front panel is broken. It snapped off cleanly at the pivot where the plastic meets the metal. The remnants of the two little plastic switch handle leg tips are still there, in the metal switch housing. The fracture is clean and is such that they would fit perfectly back onto the main hunk of the switch plastic, like new, if l could find the right compound to get the pieces to re-meld into each other. I guess model airplanes used to employ this sort of melding technique I'm describing in their construction, right? But I have no idea of the chemistry involved -- whether pdp11 switch plastic is compatible with that sort of glue. I don't think I want something that just adheres, non-porously to the bits because that would interfere with the operation of the switch pivot point and there's no room for inaccuracy / spurting glue gobs in there. The fracture is essentially _at_ the pivot. So my question: are these pdp11 switches the right sort of plastic for this meld repair I'm describing? If so, what's the chemical that I'd need to make this happen? Plain old model airplane glue? thx jake

11 years, 4 months

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SC40 (pictures)

by b4＠gewt.net

(sorry for delay, been busy!) Evidence of having saved: http://i.imgur.com/gatos9o.jpg http://i.imgur.com/oBEvLP8.jpg http://i.imgur.com/ZmLpwhV.jpg http://i.imgur.com/KYl73d8.jpg Pardon any mess! -- Cory Smelosky http://gewt.net Personal stuff http://gimme-sympathy.org Projects

11 years, 4 months

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FYI

by info＠leehao.com

Dear Friend, I am writing this mail in confidence . I am looking for a trust worthy person and I decided to contact you because you and the deceased customer has the same surname. My name Lee hao and I work in Private Banking Division of Bank of Communication Hong Kong and 9years ago I opened and managed account for an individual Ryan with a financial portfolio of USD$9,000,000.00(Nine Million United States Dollars)which he wished to invest and have spun around in the growing market in mainland China at that time. we made various investment opportunities and this hide high return and with sometimes getting back return as high as %0.02 of funds total quarterly. This ran until last quarter in 2009 when he instructed me he had URGENT investments in Hong Kong which requires cash payment and that I liquidate funds principal(9M) and have monies available to him in Hong Kong which we did. We made contact with a reputable bank in Hong Kong at that time(Bank of China) and they agreed to receive the money for a fee and make cash available to our client. I went ahead with the transfer request and that was the end of it. However Bank of China send us memo end of 2010 informing us the money was not claim since that time and that they only inform us about this because after a certain amount of years and money not claim government confiscate money as unclaimed funds. Further to this an enquiry was carried out and it was discovered that Ryan was involved in automobile accident in Chengdu, Sichuan Province Mainland China in 2010 and died as a result of his injuries sustained. on further enquiry we also discovered he died intestate without a known next of kin to the funds in Bank of China as his wife and only known relation had died some years earlier before making investment with my bank. This is what I propose: Since you share the same last name as the late Ryan you stand in as next of kin and with my exclusive access to his file and the preparation of legal documents I make you the beneficiary to the funds in bank. I painstakingly work out all modality how this should work without no one get into trouble now or in the future when all concluded. I know this might be a bit heavy for you but trust me on this for you do not have to have known him for provided you have same last name and with the arrangement I have in place I assure you this would work. Nobody get hurt as this lifetime opportunity for me to secure a better future for my family as I retire soon and with all my years in the banking sector very little to show for. Finally I do understand you may be skeptical about this considering the fact you do not know me and we not have previous dealing. Rest assure this is a known practice in the banking industry here in Hong Kong/mainland China as this happens every time the only other alternative is money revert back to the States enriching already wealthy corrupt government officers. I send you this letter not without a measure of fear as to the consequences of this if my actions are discovered and I beg you do not betray my confidence in this matter for I know nothing ventured is nothing gained. If you are able to render your genuine assistance please get back to me immediately via, email. I look forward to executing this business deal with you. I ask that if you find no interest in this project that you should discard this mail. I ask that you do not be vindictive and destructive. If my offer is of no appeal to you, delete this message and forget I ever contacted you. Do not destroy my career because you do not approve of my proposal. You may not know this but people like me who have made tidy sums out of comparable situations run the whole private banking sector. I am not a criminal and what I do, I do not find against good conscience, this may be hard for you to understand, but the dynamics of my industry dictates that I make this move. Such opportunities only come ones' way once in a lifetime. I cannot let this chance pass me by, for once I find myself in total control of my destiny. These chances won?t pass me by. I ask that you do not destroy my chance, if you will not work with me let me know and let me move on with my life but do not destroy me. I am a family man and this is an opportunity to provide them with new opportunities. There is a reward for this project and it is a task well worth undertaking. I await your response. Best regards Lee Hao Email: leehao44 at hotmail.com <mailto:leehao44 at hotmail.com>

11 years, 4 months

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imitation game movie

by elson＠pico-systems.com

Forgive me if I missed earlier discussion, but has anybody seen the Imitation Game movie, ostensibly about Alan Turing? There certainly were some real howlers in there, like the bit where Turing single handedly decides what info they would share with the British government, so as not to alert the Nazis that the Enigma code was broken! Also, there is only one instance of the Bombe, while it is pretty well known they had a set of 350 of them at Ft. Meade running 24 hours a day. And those were the NCR Bombes, running at 1800 RPM, insted of the one in the movie going clunk-clunk-clunk. Some other papers seem to indicate there were another 350 Bombes at Bletchley. It only makes sense for there to be a big array of NCR Bombes, not the slow British-built ones, but with all the ships being sunk, how could they be sure such a shipment could make it across the Atlantic? These things were critical national resources, so I just can't image the US shipped a batch of them to Britain. (Also, there is the security issue of how to keep prying eyes off the Bombes while being shipped.) Also, they have Turing building the Bombe with his own hands. Various descriptions have hundreds of people at Bletchley wiring the rotors and doing much of the other work. The Bombe parts must have been made in machine shops across England. At the end of the movie, they sort of imply by a confusing flashback that Turing tells the whole story of the code cracking work at Bletchley to the police officer. It is well documented that he never revealed anything to anybody about what he did there. Any comments? Jon

11 years, 4 months

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Looking for DEC FlipChips - M100, M102, M633

by j＠ckrubin.us

I've recently acquired a TC08 controller to interface a set of TU55 drives to my PDP-8/I. My 8/I has the earlier Negibus I/O configuration and the simplest (at least in terms of number of cards required) solution for interfacing is to convert the Posibus TC08 to a Negibus TC08N. This requires swapping out a few positive logic interface cards for the corresponding negative logic equivalents. I'm looking for the following cards and quantities: M100 - qty 3 M102 - qty 2 M633 - qty 4 Please let me know off-list if you have any of these items available for sale or swap. If you do have an M102 but don't want to get rid of it, I'd be very happy just to have clear photos of the card, front and back. Vince Slyngstad has already prepared Eagle layouts of the M100 and M633 but lacks adequate info to recreate the M102. Thanks! Jack

11 years, 4 months

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Any PDP8 for sale..?

by martin＠meiner.ch

Being bitten by "vintage computer restoring" bug, I am long time looking for a reasonable condition PDP8, preferably a PDP8/L.? Is there such a machine out there looking for a new home or can someone point me to a possible selling-place other than eBay? EBay has hardly any, and just a few weeks ago I unfortunately missed one. Any help or hint is highly appreciated...

11 years, 4 months

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Looking for RSTS/E and RSX-11 Software

by captainkirk359＠gmail.com

Hello all, I'm looking for some good demonstration/fun software to run on my demo RSX-11/M+ and RSTS/E systems. I don't much mind what the software is so anything that can be provided I'll probably find useful. In particular I'm looking for some games. If it's of any consequence, I'm using RSX-11/M+ 4.6 BL87 and RSTS/E 10.1-L. Also, does anyone know if there's any other archives that have copies of the RSTS/E and RSX-11 layered products than the Trailing Edge FTP? (Particularly I'm interesting in getting DEC C on RSX-11/M+, but if I recall correctly the tape image on the aforementioned archive is corrupted. Also I'm looking for the WPS package for RSTS/E.) Thank you to any who respond! Regards, Christian -- Christian M. Gauger-Cosgrove STCKON08DS0 Contact information available upon request.

11 years, 4 months

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building my own relay computer

by rickb＠bensene.com

I have often thought it would be cool to build a relay calculator, along the lines of Casio's relay calculators that they marketed for a time in the 1950's before it became clear that electronics were the way to go. They even made some scientific and programmable machines, but a basic four-function machine with an accumulating memory register would be enough. Rick Bensene The Old Calculator Museum http://oldcalculator.com Sent from my Android phone using TouchDown (www.nitrodesk.com)

11 years, 4 months

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building my own relay computer

by tom_a_sparks＠yahoo.com.au

I've been bouncing around the idea of building my own relay computer * I have mostly inspired by the TIM project[1] and Harry Porter's Relay Computer[2] * I am looking at having a limited number registers like the 6502 or 6800 * the computer is going to be Harvard architecture based I wondering have any of use done anything like this? [1] http://www.northdownfarm.co.uk/rory/tim/ [2] http://web.cecs.pdx.edu/~harry/Relay/

11 years, 4 months

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Not news to anyone on this list but...

by cctalk＠fahimi.net

Good to know that at least some people at these big "tech" companies are thinking about something other than their bottom line... http://www.bbc.com/news/science-environment-31450389 -Ali

11 years, 4 months

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It's time to restore the 11/45.

by jnc＠mercury.lcs.mit.edu

> From: Jacob Ritorto > My NASA EE buddy recommended working up an appropriate load from > regular household lightbulbs. They won't light, naturally, but you can > dial in your load by simply choosing certain wattages and doing the math. Err, both tungsten and carbon filament incandescents have very different resistance when hot (lit) and cold. To make it even more, they are of opposite sign: with tungsten, the resistance increases as it heats up (a nice stabilizing feedback), and with carbon, it goes the other way. So if you're not running enough current to light the bulb, you can't use the printed watt rating; you'll have to use an ohm-meter. Noel

11 years, 4 months

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Can anyone ID this Card Reader?

by coryheisterkamp＠gmail.com

Gents, I was curious if anyone on the list recognizes this card reader. EAI is the only marking (see last pic). Interestingly, there's a switch for every single possible punch position. Was this some sort of "boot ROM"? http://www.radar58.com/reader/IMG_2894.jpg http://www.radar58.com/reader/IMG_2895.jpg http://www.radar58.com/reader/IMG_2896.jpg http://www.radar58.com/reader/IMG_2897.jpg Thanks, Cory

11 years, 4 months

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Failed ICs and components

by marc.verdiell＠gmail.com

Mattis Lind from this forum sent me some failed National Semiconductor 74xx series, plastic encapsulated. These were from an HP 98xx series calculator I believe. He noticed than when they failed they failed open. I failed myself to have the local National Semi people interested in looking at them, and I just did some XRays to find out if something obvious had happened to the wire bonds. Nothing we could see, but we didn't take enough close ups. I want to take a look again, and if I don't find anything could send them on to you if Mattis is OK with it. Marc > Darn! That sounded like a good collection. Alas, I know I haven't kept > every bad IC either (except that one from the PDP-8/E...not really sure why > until now, I guess). But if you do find them, I could certainly use them.

11 years, 4 months

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building my own relay computer

by tom_a_sparks＠yahoo.com.au

On 14/02/15 11:02, Cory Heisterkamp wrote: > Tom, any reason for choosing the Harvard architecture? it may have some Modified Harvard architecture the computer is NOT Stored-program based, it may have a small (128/256 byte) CPU styled cache > I'm currently in the middle of a relay computer build so I'll toss in my 2 cents. > The most important thing I hit on early is to define the instruction set, > work out a number of potential applications/uses on paper (or excel), > and step through each instruction to make sure the machine is capable enough. > You'll probably discover a number of efficiency improvements you can make to the hardware while doing so, > and a few "hardware subroutines" worth adding. > You can also baseline how long a program will take to run if you settle on a clock rate, and determine if there's a better way to do it. > Ultimately, relay computers are SLOW. Don't take 6 cycles to do what could be accomplished with a couple extra relays and a single pulse. > Well thought out HW and instructions will pay big dividends when the soldering iron comes out. -Cory good point, I am prototyping the computer design in software and software in 6502 assembly

11 years, 4 months

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building my own relay computer

by radiotest＠juno.com

Sorry, this was accidentally sent before it was completed. At 04:40 PM 2/13/2015, Tom Sparks wrote: >I've been bouncing around the idea of building my own relay computer I built a greatly scaled down version of Simon more than 50 years ago. See Chapter 3 in: Edmund Callis Berkeley Giant Brains, or Machines That Think New York: John Wiley & Sons, Inc., 1949; Reprinted New York, Science Editions, Inc., 1961 Available in DejaVu format at: https://ia600504.us.archive.org/17/items/GiantBrains/giant_brains.djvu Dale H. Cook, GR / HP Collector, Roanoke/Lynchburg, VA http://plymouthcolony.net/starcity/radios/index.html

11 years, 4 months

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building my own relay computer

by tom_a_sparks＠yahoo.com.au

On 14/02/15 09:52, Brent Hilpert wrote: > On 2015-Feb-13, at 2:56 PM, Tom Sparks wrote: >> On 14/02/15 08:20, Brent Hilpert wrote: >>> On 2015-Feb-13, at 1:40 PM, Tom Sparks wrote: <snipped> > Just an opinion, but the Zusie / Z3 recreation ref'd by Pontus looks most interesting, if one wants to do an historical design vs. something novel. my project is a what if?.... "1890 portable telegraph switching computer" I am limiting myself to 1930's knowledge and ideas because they could have be discovered early in time, but unpublished/lost/etc I am welling to use modern versions to reduce the build time > The Zusie site mentions the Z3 recreation in Germany. > With a few recreations of the same machine there's the potential to benefit from community software development. > > The Zusie fellow sure was fortunate to obtain a large quantity of good relays at scrap prices. > I've long been interested in building a relay computer but that's one of the stumbling blocks - relays new are so pricey today. I noticed that with the relays > Had in mind a physical implementation much like the Zusie, upright front-access 19" relay rack with an LED per relay to show state (and many blinkenlights). >

11 years, 4 months

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