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101090 discussions

Up for Auction: Memory from the First Computer in Space

by jnc＠mercury.lcs.mit.edu

> From: Steven Malikoff > a Raytheon module from a Block 1 AGC > ... > I don't think the Block 1's were flown(?). Yes, but not on manned flights. (Researching this is made more complex because there were quite a few different AGC designs; AGC3, AGC4, AGC4B, AGC5 and AGC6, in addition to Block I and Block II.) Sources differ a bit: "Journey to the Moon" (Eldon Hall) says (pg. 107) that Apollo 6 was "the last flight with Block I guidance system equipment" - but it's not clear if that refers to the AFC. "Digital Apollo" (David Mindell) says (pg. 175) that Apollo 5 was "the first Block II computer flight". So somewhere around there. (Apollo 7 was the first manned flight, and the first Block II spacecraft, per Mindell, pg. 176 - note that Block II spacecraft apparently != Block II AGC - very confusing!) Both excellent books, BTW - highly recommend them both. Noel

10 years, 6 months

Up for Auction: Memory from the First Computer in Space

by COURYHOUSE＠aol.com

didn't they keep craft intact for display etc? heh who stole the memory then!/ anything is FLOWN in space has a high value. we collect a bit of that but most is stupidly out of the price range. ed sharpe archivist for smecc In a message dated 10/28/2015 12:32:03 P.M. US Mountain Standard Tim, paulkoning at comcast.net writes:

10 years, 6 months

EISA?

by seefriek＠gmail.com

Would anyone have a working EISA motherboard or smallish EISA machine they'd part with for a reasonable price? I find myself in need of one to resurrect some elderly kit I'd like to play with. Contact off-list. KJ

10 years, 6 months

TTY paper - $5 per roll in St. Paul / Mpls.

by drlegendre＠gmail.com

Anyone in the St. Paul / Mpls area need paper for a Teletype? I had to buy half a dozen rolls to get a decent price, so I am making (3) spare rolls available at my cost of $5/roll. If you have interest, please send me a message off-list - thanks! -Bill

10 years, 6 months

Dowalert tape recorder thingy

by dave＠661.org

Has anyone here ever used a Dowalert back in its heyday of the early 1980s? For those who don't know, a Dowalert is a device that resembles a tape-driven telephone answering machine. Dow Jones had an idea of broadcasting stock information over FM radio to this device for later perusal by subscribers. The device has a keypad upon which you'd enter numbers for particular classes of information you want. The broadcast would include a code detectable by the device. If the code on the broadcast matched one of those selected by the subscriber, the tape recorder would start recording. Then an alert light would turn on letting the user know that some new information is available. -- 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?

10 years, 6 months

Trying to get my RLV11 working

by jnc＠mercury.lcs.mit.edu

> From: Ben Sinclair > I think you had written something a while back that would test that > interrupt. Was that correct, or is there another diagnostic I can use > to test that? Well, I'm sure there's a DEC diagnostic for the DLV11-J, but I have no idea what it is. I did have a little ~20-instruction program that tests the receive and transmit interrupts, I'll send you the URLs for the source, and ODT script, forms. (Not sure what forms of object formats you can load into the machine.) > After changing those switches I accidentally put the M8014 above the > M8013. Luckily that didn't fry anything. (I'm not looking down in disdain, I've made a few similar mistakes myself! I usually try and stop and check twice every time I go to turn the power on after I've fiddled with the hardware, for precisely that reason.) > I've swapped them and now get slightly different results: I wonder if that's because there's no drive? Is this test suppose to need one, I forget (I think you said but I'm too lazy to look :-). Noel

10 years, 6 months

Trying to get my RLV11 working

by jnc＠mercury.lcs.mit.edu

> From: Johnny Billquist > I wonder if it really uses 18 bit addresses in the console. Yes (if the question is 'for input'). What it puts out on the bus I haven't checked, definitely BBS7 plus the low 13 bits (0-12), dunno about BDAL13-21. > From: Ben Sinclair > For 18 bit addresses, I assume I would look at 74400 instead? No, that's only 15 bits. (In octal, each full digit is 3 bits. So an 18-bit address will range from 000000 to 777777; 16-bit from 000000 to 177777, etc.) Noel

10 years, 6 months

Sale with a lot of ATT 3B2 stuff

by jws＠jwsss.com

This is a representative auction by the vendor. Look at all of his stuff for the whole story. VINTAGE-COMPUTER-AT-T-3B2-500-600-1000-UNIX-SYSTEM-16MB-MEMORY-WESTERN-ELECTRIC http://www.ebay.com/itm/321811268824 The buyer of his Lisp Machine is going to be sad. The vendor has broken off good to have spares and software for a working machine into separate auctions. Unlike the 3B2 stuff which is all parts. Not a nice thing to do if you are asking $9500 for the machine and only a few hundred more for the spares. Spares such as mice, keyboard, and software restore tapes. Nice. Thanks Jim

10 years, 6 months

Microvax 3800 Soon to arrive

by lyokoboy0＠gmail.com

Hello. I seem to be getting quite a big assortment of DEC equipment over here as of late. Back in July I made a trip to Miami to pick up a PDP 11/34 with related equipment a while back and posted about it here on the list. I'm still working on getting the power supply on the pdp 11 fixed but am making good progress and learning a lot in the process. Recently a deal popped up on a microvax 3800 that was too good to pass up so I jumped at the chance to get it and it is on it's way to being shipped here. I have never dealt with any Vax hardware before. The closest I've been to one is running a simulation of a machine in the simh emulator. Is there any special hardware I will need to get this up and running? I have a couple of VT 100 terminals that go with the pdp 11 that should work nicely with the Vax. Is there anything a beginner with such hardware should look out for? I would like to try and disconnect the power supply and test it separately if possible to save myself the headache I experienced with the PDP 11. Any suggestions or other info much appreciated. --Devin

10 years, 6 months

Trying to get my RLV11 working

by jnc＠mercury.lcs.mit.edu

> From: Ben Sinclair > I'm trying to get my RLV11 working Oh, I was going to mention this about the RLV11 - it's a Q18 device. So it _probably_ won't work in a system with more than 256KB of memory (which you don't, at this point, have, though). It would all depend on the OS, whether it understood that it couldn't DMA to anywhere above 256KB. (The controller should work OK in a Q22 system - it just won't drive the high address lines, so they will go to 0 - but it just won't be able to DMA to high memory.) > I have a PDP-11/23 in an H9273 backplane. I just got it working > reliably without the RLV11 boards installed ... > Here's my configuration: > Down the left side: M8186, M8044, M8044, M8043, M8013, M8014, and > M8012 (the BDV11) on the bottom. Here's something to try (to make sure the 8013 is passing grants OK); put the M8013/14 _before_ the M8043, and see if a test which uses interrupts on the DLV11J works. > I also looked at myself and get 005737, though I'm not sure what > it should be. I take it "17440" is a typo for '174400'? Anyway, neither would work: in 11/23 ODT, '174400' is the address of a word of memory, up near the 64K boundary. To get to the device registers, you need to type '774400'. If that doesn't work, the addressing on the RL11 board-set is wrong somehow. Noel PS: Speaking of typing addresses to ODT - My favourite pet 11/23 peeve: there is no way, from ODT, to read/write memory above 256KB! That can only by done by a program! (The 11/73 does not suffer this issue.)

10 years, 6 months

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