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heavy stuff -- was: Anyone want an RK11-C manual?

by ed＠groenenberg.net

Henk, Have you tried using a block and tackle to pull the drived up the stairs using the planks? Ed -- Ik email, dus ik besta. BTC : 1J5fajt8ptyZ2V1YURj3YJZhe5j3fJVSHN LTC : LP2WuEmYPbpWUBqMFGJfdm7pdHEW7fKvDz On Fri, December 16, 2016 21:23, Henk Gooijen wrote: > > > > Van: Tony Duell<mailto:ard.p850ug1 at gmail.com> > Verzonden: vrijdag 16 december 2016 17:54 > Aan: General Discussion: On-Topic and Off-Topic > Posts<mailto:cctalk at classiccmp.org> > Onderwerp: Re: Anyone want an RK11-C manual? > > On Fri, Dec 16, 2016 at 4:31 PM, Henk Gooijen <henk.gooijen at hotmail.com> > wrote: >> >> But I am not giving up hope ??? I recently acquired something I did not >> think >> to be possible to happen ??? I ???picked up??? an H960 rack with RP11 >> controller >> and *three* RP03 disk drives aand 6 packs. The rack is already moved, >> the >> drives are a separate story. Each drive weighs 415 lbs. ???So what??? >> you might >> ask. Well, they are in a cellar and three flights of stairs (10 steps, 6 >> steps, >> and 4 steps) is too much for 3 strong guys to push one drive up the >> stairs. >> We are now looking into another option to get the drives (and a DEC >> _line_printer, also very very heavy!) up to the first floor ??? > > Can these units be dismantled without totally losing alignment,etc. At > least > remove PSUs, spindle motors, etc. I once moved an RA60 (much lighter, > but still too heavy for one person to carry easily) downstairs by taking > it > almost completely apart. Incidentally, it is surprising how much the PCBs > in a full cardcage weight, it is often worth pulling them all out. > > I suspect an RP03 dismantled like that would still be too heavy for one > person > to move, but with 3 people it might be possible. > > I hope your upstairs floor is strong enough for them... You do not want > them > coming back downstairs at 9.81m/s^2 > > -tony > > > Grin ??? I don???t plan to check whether Mother Earth???s acceleration is > still working fine. > Indeed, the RA60 is heavy. Just like RA81???s, the RA60 is not good for > your back, but > the RA60 is worse than the RA81. The RA60 is also ???longer??? compared to > the RA81, > and that does not help either when you hav to move an RA60 around. > > I really do not want to mess with the mechanical construction of the > entire RP03 > drive. They are too rare. I want to move them ???as is???. The only thing > that can be > done easily is removing the side panels. > However, the ceiling in the cellar has an opening although that is > currently welded > by a closing lid. The system was installed in the 80ties, and it is not > remembered > how the system got into the cellar back then. The system has operated in > that cellar > for almost 20 years (PDP-11/40, RP11, Kennedy 9100 ??? 3 H960 rack > system). > > I used wooden planks (shelves) laid on the stairs, and then pushed the > racks up. > It was heavy, even for 3 strong guys --- OK, 2.5 ???? I removed the > Kennedy tape > drive to make the rack less heavy. The rack with the RP11 controller was > also > heavy, but I really did not want to pull or dismantle anything of it. We > got it out > of the cellar. The 11/40 (the 21??? version in BA11-F, IIRC) rack had, to > my surprise > an extra BA11-F with its H742 PSU ??? One H742 PSU is already heavy, so > two of > these beast made the rack way too heavy. I ended up with disconnecting > the > power harness and move the 11/40 separately. That made it possible to > move > the rack upstairs (with sweat and some swearing ^H^H^H^H^H^H^H^H calling > in the help of some gods ???? > > We did try moving one RP03 by pushing it upstairs using the ???planks??? > trick. > Three guys asking ???are we pushing???? Yes, but the drive did not move > at all. > The RP03 is by far the most heavy item I encountered in 20 years! > We are now looking into the option to hoist the drives via the hatch in > the > Ceiling. Needless to say we take all possible precautions ??? for people > and for > RP03???s. > > To be continued, > > * Henk, PA8PDP > > >

9 years, 1 month

Rack-mounting a TU56

by henk.gooijen＠hotmail.com

Van: Jay West<mailto:jwest at classiccmp.org> Verzonden: vrijdag 16 december 2016 21:05 Aan: 'General Discussion: On-Topic and Off-Topic Posts'<mailto:cctalk at classiccmp.org> Onderwerp: RE: Rack-mounting a TU56 Ok I just double-checked my 8E racks, and it refreshed my memory. The support bracket is not necessary. I believe that it provided no benefit after the TU56 was mounted... it was merely present in order to make it even possible for one person to bolt the tu56 to the uprights. It is a non-trivial amount of weight, so holding it in place while bolting it in is tenuous at the least and most likely impossible. The support bracket just provides a front edge to help hold it up during installation. But given the weight, I'd not try it "just to see" ;) YMMV That is my experience too. But I did that mounting job in the rack back when I was 15 years younger. Age does not help in this case. It can be done by one person, but indeed ? it is not non-trivial! If you start with an empty rack, and the TU56 is the first device you want to install in the rack, you can lay down the rack on the floor and then ?drop? the drive into the rack. Bolting it in place with the 4 screws at each side is ?piece of cake?. I used this ?procedure? also to mount two RK05 drive in the top of an H960 rack. Getting the rack upright with the two RK05?s was another story ? The more a rack is filled (in the lower part), the heavier tilting and laying down will become, but it is possible. * Henk, PA8PDP

9 years, 1 month

HP 9875A usable for interchange with 85 or 9825?

by cruff＠ruffspot.net

I?m working on getting my 9875A dual DC100A tape drive operational, but have come across a strange issue. This 9875A seems to have the reversed sense of on which reel the rewind places the tape as compared to my 85B and 9825T (which agree is the left hand one as viewed when inserting the tape into the drive). I don?t yet know that the 9875A is operating fully, but it passes the non-tape movement selftest. The 9875A manual mentions it being useful for interchange among systems, and the tape structure (Standard Interchange Format - SIL) matches that of the 98x5 series, and it appears uses the same tape control chip as described in the April 1978 HP Journal article on the 9845. I guess there could be a failure on the tape control board that is reversing the motor control direction, as both drives behave in the same way, or is causing the firmware to think it is at the wrong end of the tape. Has anyone used the 9875A in this way? I was thinking it could be a way to load binary programs into the 9825.

9 years, 1 month

Anyone want an RK11-C manual?

by henk.gooijen＠hotmail.com

Van: Noel Chiappa<mailto:jnc at mercury.lcs.mit.edu> Verzonden: vrijdag 16 december 2016 17:08 Aan: cctalk at classiccmp.org<mailto:cctalk at classiccmp.org> CC: jnc at mercury.lcs.mit.edu<mailto:jnc at mercury.lcs.mit.edu> Onderwerp: Anyone want an RK11-C manual? As I finish going through the mounds of paper I've recently aquired, I now have a extra (duplicate) copy of the RK11-C manual (in the format of the early 11/20 manuals, i.e. 11"x17" sheets). Is anyone here qinterested in having it? Preferably somehow who actually has an RK11-C - I know there's at least one person on CCTalk who has one. If so, please let me know. (People who actually have an RK11-C get preference. And if you already have a copy, please don't try and hoard a second! :-) Noel I remember a week in 2005 (or thereabouts) when one RK11-C was on eBay. It went for $57 (IIRC). There have been a few occasions since then that I slap myself for not at least trying to get it ? Never seen a single RK11-C ever since. But I am not giving up hope ? I recently acquired something I did not think to be possible to happen ? I ?picked up? an H960 rack with RP11 controller and *three* RP03 disk drives aand 6 packs. The rack is already moved, the drives are a separate story. Each drive weighs 415 lbs. ?So what? you might ask. Well, they are in a cellar and three flights of stairs (10 steps, 6 steps, and 4 steps) is too much for 3 strong guys to push one drive up the stairs. We are now looking into another option to get the drives (and a DEC _line_printer, also very very heavy!) up to the first floor ? * Henk, PA8PDP

9 years, 1 month

Anyone want an RK11-C manual?

by jnc＠mercury.lcs.mit.edu

As I finish going through the mounds of paper I've recently aquired, I now have a extra (duplicate) copy of the RK11-C manual (in the format of the early 11/20 manuals, i.e. 11"x17" sheets). Is anyone here qinterested in having it? Preferably somehow who actually has an RK11-C - I know there's at least one person on CCTalk who has one. If so, please let me know. (People who actually have an RK11-C get preference. And if you already have a copy, please don't try and hoard a second! :-) Noel

9 years, 1 month

An interesting use of the 4004 instructions

by dkelvey＠hotmail.com

I was looking at some disassembled 4004 code when I came across a SKIP operation. It isn't normally an instruction but If you do a JCN with all the CCCC = 0, it will do a NEVER jump. This is the equivalent of a SKIP instruction. I would suppose a JCN with CCCC = $8000 would be an always jump, on page ( not real useful as JUN takes the same cycles and space ). I thought at first there was some errors in the code because there were JMS to the middle of JCN instruction but then I noticed that there were no conditions specified for the JCN. A little thought and I realized it was a way to skip over a single byte instruction. Dwight

9 years, 1 month

DisplayWriter apparently on Craigslist...

by dave.g4ugm＠gmail.com

http://www.vcfed.org/forum/showthread.php?55404-IBM-Displaywriter Dave Wade G4UGM & EA7KAE

9 years, 1 month

PDP-6s at MIT

by jnc＠mercury.lcs.mit.edu

> It great to have such a detailed description of the DM PDP-6. I hope you're not being serious! There was almost no detail there. But... > I suppose that since the DynaMod group got their 10 shortly after the 6, > they may have focused on getting the 10 up and running. Maybe they > didn't bother to make the 6 run in timesharing mode. I think all the DM people are still around - why not ask one of them for more? Probably best to start with Al Vezza, the group leader; I don't have a guaranteed e-mail for him, and a quick Google didn't show a page for him anywhere, but the e-mail address on his WWW resignation note page is the same as the one on his MIT information entry, so maybe it still works. Jack Haverty was in the group for a while early on, too: http://mailman.postel.org/pipermail/internet-history/2012-May/002288.html Another possibility is P. Dave Lebling (PDL). Or Tim Anderson (TAA) if you can't get ahold of him. Noel

9 years, 1 month

6502 code

by dkelvey＠hotmail.com

Hi There has been so much PDP and other stuff lately I kind of feel out of place asking about 6502 stuff. Anyway, I've mentioned on the 6502.org that QuickSort is not always the fastest sort. So I wrote a 6502 assembly sort but don't have a machine big enough to test it on. I've only got my KIM-1 just working. I was hoping someone would like to help me out, possible a Commodore64, maybe even a PET or Apple II. It needs about 24 page zero bytes and about 5K of RAM. It sorts 1K of 16bit integers. Anyway, if someone would like to help, let me know. I've made several passes through the code and believe it to be close to bug free but know I'm bound to have a couple left. See it as a challenge! Thanks Dwight

9 years, 1 month

WTB 12/16MB RAM (MS42-BA/CA) for VAXstation 3100/30

by jacek.greniger＠gmail.com

Hi, Recently I acquired pretty nice VAXstation 3100/30. It has GPX graphics card, two RZ23 disks (one dead, second cause short circuit but after removing tantalium capacitor on +12V line looks to be working) and MS42-AB 4MB memory extension card. Installed NetBSD under SIMH and disk image will be moved to physical drive when I will find one (100MB is not enough). But the bigger problem for me is to find 12MB or 16MB memory extension for this machine. So I'm looking for MS42-BA or better MS42-CA (16MB) card. Maybe there is somebody who is willing to part with it. My location is Poland. Best regards Jacek

9 years, 1 month

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