test-drb

test-drb@ccmp.vtda.org

101090 discussions

by mdavidson1963＠gmail.com

On Tue, Jun 8, 2010 at 3:56 PM, Zane H. Healy <healyzh at aracnet.com> wrote: > At 11:03 PM +0200 6/8/10, St?phane Tsacas wrote: >> >> http://losangeles.craigslist.org/sfv/sys/1777867686.html PDP 11/23+ - $1 >> (Sherman Oaks ) >> >> Western Digital , PDP 11/23+ , Brand New , Never Used , RLO2 , Kenedy Tape >> Drive > > It's probably just as well I'm no where near close, but I have to question > the description. What is the odds of a 20-30 year old system being "brand > new", and where do the Western Digital and Kennedy Tape Drive come into play > based on the photo. ?I see a /23+ and two RL02's. ?A rather nice config. ?I > have a /23 like that, though lack the rack. I'll let you know... I've contacted the seller and told him that if he didn't get any local offers, I'd be interested (I'm in San Jose). The family would enjoy a long weekend drive to LA... :) Mark

15 years, 10 months

DEC RQZX1 and KDJ11-E boot problem?

by bqt＠softjar.se

"Zane H. Healy" <healyzh at aracnet.com> wrote: >> >I will also try a different model of SCSI drive too - perhaps the >> >Quantum Fireball is too much of a good thing (4200RPM 2.1GB); I have >> >an old clunker of a Quantum ProDrive 80S (3600 RPM 80MB!) > > Do you happen to have any DEC RZ2x HD's? I'd recommend giving those > a try. While RSTS/E 10.1 doesn't require these, it is possible that > the RQZX1 does, or the combination of the board and RSTS/E does. No, that will not help. But I agree that those drives are nice. > RSTS/E can be touchy. I was totally unable to install DECnet/E from > 4mm DAT using a TLZ06, even though I installed RSTS/E 10.1 that way. > On the other hand the install worked just fine using a TK50 and TKZ30 > drive. RSTS/E is sometimes very picky, which is sad. It absolutely requires that some stuff be installed from a specific type of tape drive, that write protection is on, or other weird requirements for things to succeed. I think John Wilson documented that pretty good in his E11 manual. Other PDP-11 OSes are more sensible. I don't know why DEC did things so strange in this aspect for RSTS/E. > Personally I'm using a PDP-11/73, Viking QDT, a 50-pin 2GB Seagate > Barracuda SCSI HD, and a Plextor 8x Caddy CD-ROM drive to run 10.1. Me, I'm using a CQD-220, five different SCSI disks, DAT, Exabyte, and occasionally I've also had different CD-ROM drives in there as well. But I've only run RSX and 2.11BSD on my hardware. (11/83, 11/84 and 11/93 systems). (Well, the 11/84 used a CDU-720, but anyway...) Johnny

15 years, 10 months

PDP 11/23+ on Craigslist (LA)

by charlesmorris800＠centurytel.net

On Sun, 13 Jun 2010 12:00:07 -0500, you wrote: >>off list that I can answer. Again, two cabinets, condition looks >>like it was stored in a garage (not pristine, but not rusted >>either). He says "well I powered it on 10 years ago and it worked" >>when I explained the situation about his idea of value, and mine. > > With most of the stuff I see that I might be interested in, the sellers seem to >have a very inflated sense of value. It seems that the value fluctuates over a wide range depending on where it's located, among other things. I also have a perfectly good working 11/23+ that I have no need for (RT-11, 4 MB RAM, two RL02's, corporate cabinet) but I'm not inclined to just give it away free either... so I guess it can just sit there until it IS worth a few bucks!

15 years, 10 months

Semi-OT: Apple iPad

by madodel＠ptd.net

> Okay, I know the iPad is totally OT, but here is my question, does > anyone on this list have one, I have a wifi only iPad. Standard it uses Safari to read pdfs directly from the web. You can buy pdf reader apps though. > and have you tried using it for reading > PDF's off of Bitsavers? How practical is this? > It should be fine for reading pdf's. There are several apps for pdf viewing, but I'm not sure what they add. I have never used it for reading PDF's off of Bitsavers, but then I think I've only looked at one pdf in the month or so I have had it. OK I just tried and it worked. I was able to browse bitsavers.org and view a pdf. Just a very basic reader though. Mark > I'm finally making real progress at getting my computer "lab" setup > with the systems I plan to keep, and don't have a way to read manuals > out there. Currently the only computer that doesn't have a VT420 > attached is the Commodore 64. Guess I should get the SGI o2 or > Sunblade 1000 hooked up... > > Zane > > > > -- > | Zane H. Healy | UNIX Systems Administrator | > | healyzh at aracnet.com | OpenVMS Enthusiast | > | | Classic Computer Collector | > +----------------------------------+----------------------------+ > | Empire of the Petal Throne and Traveller Role Playing, | > | PDP-10 Emulation and Zane's Computer Museum. | > | http://www.aracnet.com/~healyzh/ | > > -- Mark Dodel<madodel at ptd.net> sent by ibisMail on my Apple iPad!

15 years, 10 months

pdp8/a rebuild

by trestivo＠cfl.rr.com

Does anyone know a reason why I can't remove the G8018's and G8019 and replace them with newer OEM power supplies? I know that one G8018 supplies 5V @ 25a, +15V @ 2a, -15V @ 2a and +20V @ 4a. I believe the 20V is only used for core memory. So.a 5v supply @ 50a should be sufficient, and a 2 dual output +/- 15v supply @ 2@ each should be a reasonable substitute. I am aware of the functions of the G8019 and that I would be defeating the "dead fan shutdown" and battery backup feature. OR. Does anyone have a written procedure for troubleshooting the backplane, specifically the SC260m triac, the opto isolator, the 2n6531 transistor and what causes the 47 ohm resistor to burn. With all boards removed I know how to defeat the removal of the two G8018's and on a good backplane by adding a jumper between two pins on the G8018 connectors. I can apply 3v to a pin on the G8019 connector to get the triac to fire. But this is not enough for troubleshooting a bad backplane. All help will be greatly appreciated. Thom Melbourne Florida

15 years, 10 months

Suggestions for repairing HP tape drive capstans?

by ard＠p850ug1.demon.co.uk

I have a number of HP QIC tape drive units -- I think it's 2 off 9142, 3 off 9144 (1 3-board, the other 2 are single-board) and a 9145 [1] all with hte same problem. The rubber capstan has turend to goo. [1] There's a darn 68000 processor in that drive, unlike the 68B09s in the other units. Eeek! The capstan is a rubber 'tyre' on a metal hub, the latter being glued to the motor spidnle. The diameter of the hub is around 12mm (but I wil measure that accurately) and the overall diameter of the tyre is perhaps 18mm (it's going to be hard to measure, sure the fact I don't have a solid one :-() Anyway, does anyone have any suggestions as to suitable material that I can obtain in the UK to repair this? Assume as ever I have a reasonable workshop and am not affraid to pull the drives to bits :-) -tony

15 years, 10 months

DEC RQZX1 and KDJ11-E boot problem?

by nigel.d.williams＠gmail.com

On Sun, Jun 13, 2010 at 3:11 AM, Zane H. Healy <healyzh at aracnet.com> wrote: > What version of RSTS/E, and does it support the RQZX1? ?I think that support > might have come with 10.1. Yes, I am using 10.1 > I'm not sure if anyone has actually attempted what you're doing, some of us > were discussing this a year or two ago, but I know I've not had time to try > it. I tried all the obvious combinations for imaging the hard disk, the final one being: SIMH using the SCSI drive as a block device (Linux: attach rq /dev/sdc) and confirming that SIMH boots the drive successfully after the install, however on re-attaching to the 11/93 it still throws the Drive not ready error when trying to boot. > Of course you may simply have some sort of hardware issue going on there as > well, I'm not familiar with the RQZX1. The drives passes the built-in RQZX1 diagnostics, which includes read/write/verify tests etc. I formatted the SCSI drive via the RQZX1 too (prior to using the drive on Linux via SIMH to install RSTS/E), just in case the format process was doing something special (although I can't imagine what since I understand MSCP masks drive specifics). A next posible step is to use this source-code for a MSCP boot so I can catch the initial boot load and see what is in the first disk block (containing the next level bootstrap): http://www.slowdeath.com/AK6DN/PDP-11/M9312/23-767A9/23-767A9.lst I will also try a different model of SCSI drive too - perhaps the Quantum Fireball is too much of a good thing (4200RPM 2.1GB); I have an old clunker of a Quantum ProDrive 80S (3600 RPM 80MB!) Does anyone know how SCSI ID's are mapped to MSCP LUNs? so far the RQZX1 appears to map the first SCSI ID (in my case #4) to LUN 0 (which is what I want) - I am assuming it just does them in sequence.

15 years, 10 months

DEC RQZX1 and KDJ11-E boot problem?

by nigel.d.williams＠gmail.com

I "imaged" (via SIMH/Linux [*]) a Quantum SCSI drive with RSTS/E and connected to the RQZX1 and via the built-in configuration menu able to see the drive (drive label appears at the correct SCSI ID) and run the "read" diagnostics successfully. But using the KDJ11-E boot menu I get an error "10 - Drive not ready" - is there something I need to do in the KDJ11-E or the RQZX1 that I have overlooked? Any ideas would be appreciated. I now have access to the KDJ11-E manual thanks to Bitsavers. But no documentation on the RQZX1, other than what I can glean from the built-in menus. [*] SYSGEN'd and then "dd" the resulting file to the drive. If I "od -o" the drive I can see location 0 and 2 have the DEC boot signature. RQZX1 SCSI Host Adapter Monitor Software Rev 2.2 23-Jun-1993 (C) Digital Equipment Corporation 1992 Hardware Rev L ***************************** Q-bus Configuration ****************************** * * * DMA : Burst length : 01 CSR0 : 172150 MSCP * * Block length : 08 CSR1 : 174500 TMSCP * * Burst delay : 01 * 1.6 us * * * * LUN CSR Mode Drive no. Start LBN End LBN Device Type * * ---------------------------------------------------------------------------- * * DU 0 0 MSCP SCSI ID 0 0000000000 0004124732 Disk * * * * * * * * * * * * * * * * Type Control-Z or <CR> to return to previous menu * * * ********************************************************************************

15 years, 10 months

PS/2 model 77s

by SUPRDAVE＠aol.com

In a message dated 6/11/2010 7:08:56 P.M. Eastern Daylight Time, doc at vaxen.net writes: On 6/9/10 4:00 PM, Zane H. Healy wrote: > > >> On Wed, 9 Jun 2010, William Donzelli wrote: >> >>> I think these machines are all fitted with a pretty standard set of >>> guts - I do not think you will find any weird cards or huge disks or >>> anything. I have not tested these machines. Condition is so-so - about >>> what you would expect from a warehouse. >> >> Actually I was thinking these might have some nice small disks. I have a >> nice stash of 100MB and 200MB 1" high 3.5" SCSI HD's that came out of some >> model of PS/2. I bought them 10+ years ago from someone that scrapped out a >> whole pile of PS/2's. They're great for my PDP-11. > Are these Model 77 or Model 77i? > Good system, either way, but the 77i is IDE, not SCSI. For the mod 77, there are two planars used. The Bermuda for the SCSI models and Lacuna for the IDE type.

15 years, 10 months

<OT> Pentina

by ken＠seefried.com

I lost Fleabag, my 20-something year old cat and last pet I had since college days on the 31st. So...right there with you. KJ

15 years, 10 months

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