test-drb

test-drb@ccmp.vtda.org

101090 discussions

by jwest＠classiccmp.org

3 lowboy racks: Rack1: Vax 11/750 Rack2: Cipher (looks like a F880), and some hard drives appear to be present Rack3: DecTalk and a VME 68030 system "stuffed with boards" Intonation is "Free to a good home". Location is just north of Boston, MA Contact me off-list if interested. Best, J

11 years, 4 months

VAX tests? (Mouse)

by mouse＠Rodents-Montreal.ORG

[Seen thanks to off-list assistance - thank you!] > Brief background: Real VAXes had real diagnostics. MicroVAXes had diagnostic$ I'm fairly sure the MDM is not what I have, then. > Moving on: Are you aware of > EK-O19AE-SG-005_MicroVAX_Troubleshooting_and_Diagnostics_May89.pdf I wasn't. I picked up a copy and it turns out to be unreadable for me; the ghostscript I have says "Unable to process JBIG2Decode data. Page will be missing data.". Modern Ghostscript is no longer suitable for open-source use, so I'm looking for alternatives, either other PostScript renderers or something to replace the JBIG2Decode code in the version I have. I have a few leads, but even in the best of outcomes it will take time. > Does your emulator have a console ROM like the real thing? Does it have any $ Yes. It is an image of the ROM from a real KA630 I have. In particular, it has the same set of tests the real thing has. The simulator passes all of them, as far as I can tell. I have a copy of EK-KA630-UG-001 and have scanned it, and read it multiple times. As far as I can tell the tests there are all run at startup, and they all pass. If there's any way to run any other tests >from the ROM, I don't know what it is. I'll also see if I can find that MDM thing, though if you couldn't find a copy it seems unlikely I will. /~\ The ASCII Mouse \ / Ribbon Campaign X Against HTML mouse at rodents-montreal.org / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B

11 years, 4 months

TRS-80 Model 1 Level 1 repair.

by terry＠webweavers.co.nz

The satisfaction of fixing a classic. For those interested what it was about and what was wrong, here are the details. http://www.classic-computers.org.nz/blog/2015-03-13-trs-80-model1-L1-fix.htm Terry (Tez)

11 years, 4 months

Recommendation for a PROM burner

by jnc＠mercury.lcs.mit.edu

Thanks to everyone who responded! I decided, after a look at the manuals, and on eBay, to go with the 23B/Unipak2B combo; it seems like it is likely to cover most things I want to do, and was available, something I could hook up to, etc, etc. A few points: > From: Jon Elson > You won't find ANYTHING that supports 1702 devices, they needed 80 V to > program. I checked, and the 29B/Unipak2B combo does not support them. Does anyone know if DEC used 1702s in anything PDP-11? Are there any other early PROMs I'm likely to run in PDP-11's that are also going to be difficult to deal with? > From: Roe Peterson >> What about the modern TL866? Anybody has experience with these? > They are fairly decent units, but can not handle 68764/68766 EPROMS, > which you might need for pdp11 systems. Well, I don't know about for PDP-11s, but the very first thing I'm going to do with it is blow EPROMs for a diagnostic ROM pack for my Tek 1240's, and those take 68764/68766's (or equivalent). So that one was out, for me. (BTW, what's the difference between the two? Looking at the data sheets very quickly, they seemed to be pretty much the same?) > From: Chuck Guzis > Do you need program the old 3-rail EPROMs? (e.g. 2704, 2708)? I have no idea what PROMs I will, over time, want to blow. I know of a couple of applications right off the bat (BDV11s, which I guess take a large range of things), and the afore-mentioned Tek 1240 ROM pack, but in the long run, I don't really know what I'll want to do with it. That's why I said I was looking for something that could do a wide range of early stuff. Noel

11 years, 4 months

Small DEC cardcage with backplane

by sander.reiche＠gmail.com

Hi all, I'm currently searching around for a small cardcage+backplane, if I'm not mistaken DEC part numbers H9281-BA or H9281-BB for a bigger one. The -BA (4x dual heights) has my preference as I'm looking to build a very nice, cute and not that power hungry PDP-11. Does anyone have one available? With kind regards, Sander Reiche the Netherlands

11 years, 4 months

AT&T 3b1/Unix PC Floppy controller help

by mikelee＠tdh.com

I'm working on one of these systems, and have run across a floppy controller issue. Everything else in the system is functioning fine, including booting from HDD. However, I have a problem where the floppy drive has power, physically works, and connected properly etc, but what I find is the drive/controller will recognize a disk is put in, click, then nothing. Just due to the way I'm working on this, I haven't been able to test any signals at the controller IC (WD2797), but I have completely swapped the IC with a different one just to check. Now, the question is, without looking at signals, what is the probability the lack of any action is could be a problem with the input to the IC (write, ready, track0, index, write protect, density signals) or with the output signals (step, direction, DRQ IRQ)? There are tri-state buffers (74LS244-input side, 74LS240-output side) on these signals, and I'm thinking one of these are misbehaving, but trying to determine which. Or could it be something completely different? Or any good suggestions on troubleshooting this?

11 years, 4 months

Radioshack documentation

by vlad.stamate＠gmail.com

Hi all, Now that RS is going down is there any effort to preserve the information that is on their website, which I assume will go down at some point (I could be wrong though)? Apologies if this has been discussed before. Things like this for example (pinouts, specs, drivers etc) http://support.radioshack.com/productinfo/DocumentResults.asp?sku_id=25-353… Regards, Vlad.

11 years, 4 months

A rather nice Atari Falcon but possible at an ambitious price...

by lproven＠gmail.com

http://www.ebay.ca/itm/Atari-Falcon-030-14-Mb-Super-Nice-Internal-External-… -- Liam Proven ? Profile: http://lproven.livejournal.com/profile Email: lproven at cix.co.uk ? GMail/G+/Twitter/Flickr/Facebook: lproven MSN: lproven at hotmail.com ? Skype/AIM/Yahoo/LinkedIn: liamproven Cell/Mobiles: +44 7939-087884 (UK) ? +420 702 829 053 (?R)

11 years, 4 months

VAX tests? (Mouse)

by johnwallace4＠yahoo.co.uk

[apologies for abuse of list protocol, bit pushed for time, crappy webmail client lazily replying to digest... usual excuses] In the absence of other suggestions so far: Brief background: Real VAXes had real diagnostics. MicroVAXes had diagnostics in ROM, or if that wasn't sufficient, the MicroVAX Diagnostic Monitor was available. Readers of the list may know where to get hold of a copy of the MDM; a quick search doesn't find an obvious source. Moving on: Are you aware of EK-O19AE-SG-005_MicroVAX_Troubleshooting_and_Diagnostics_May89.pdf or similar? Bitsavers is where I found it, e.g. http://bitsavers.trailing-edge.com/pdf/dec/vax/3800/EK-O19AE-SG-005_MicroVA… Does your emulator have a console ROM like the real thing? Does it have any tests in it? The KA630 ROM diags are covered briefly in Chapter 5 of the KA630 Users Guide, e.g. at http://www.vaxination.ca/vms/microvax/EK-KA630-UG-001_FEB86.PDF A VAX is a VAX, to a large extent, so generic diagnostics (not CPU-specific) might be helpful in some cases. The detailed innards of memory management may not be one of those cases, though there are likely some CPU-independent parts too. Have a read of the manual(s) above if you haven't done so already, see if you can get hold of a downloadable MDM image, report back? Best of luck.

11 years, 4 months

Looking for HP UX for an HP 9000/712

by slandon110＠gmail.com

Hey all, Im looking for HP UX for my HP 9000/712 Anybody got a source, I cannot find anything and I am trying to get it back to its original glory Thanks Steve

11 years, 4 months

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