test-drb February 2015

test-drb@ccmp.vtda.org

203 participants
261 discussions

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

9 years, 6 months

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

9 years, 6 months

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

9 years, 6 months

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

9 years, 6 months

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.

9 years, 6 months

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

9 years, 6 months

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.

9 years, 6 months

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

9 years, 6 months

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

9 years, 6 months

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

9 years, 6 months

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test-drb February 2015