test-drb May 2007

test-drb@ccmp.vtda.org

235 participants
483 discussions

Complete success, OS/8 is up and running :) not so fast...

by charlesmorris＠hughes.net

On Fri, 25 May 2007 22:20:56 -0500 (CDT), you wrote: >Probably it didn't trup the first time you put the back in, when you >re-iserted it, and re-cloxsed the cover, it worked. You might want to >look at this, tweak the adjustments, etc. > >-tony Naturally, I jinxed it by bragging about my success :( The next day, the system wouldn't boot and I could see the FAULT light flicker as the system halted at address 10107. I initially thought disk drive problems again, or the pack got clobbered during swap-out for some reason. However, a little investigating quickly showed that even the most basic ten-word TTY check program would not deposit or run. In fact, when depositing or examining sequential locations I found the address display would increment from 0200 to 0001. 0577 would increment to 0400, etc. So something is wrong with address bit 4. I pulled all the boards from the backplane except the CPU set and it still does it. Now I've got to fix the hardware! Sigh. Meanwhile I have been SIMH-building a new OS/8 image from scratch for two drives. After much struggle I have the RL20 handler installed (which has logical drives R20A,B,C,D; the RL21 handler with R21A-D, and I had to omit the last 20% (the "E" drives on RL2E) because OS/8 can only allow fifteen handlers and space is needed for (at least) the R2SY system handler, TTY, SYS and DSK also... reminds me of Gates' "640K should be enough for anyone". -Charles

17 years, 7 months

Punch card file drawers.

by roger.holmes＠microspot.co.uk

On 26 May, 2007, at 17:13, cctalk-request at classiccmp.org wrote: > > A while back, Someone here was looking for punch card file cabnets > and there was several > metos'. That was me, I asked for ones in the UK. What's a meto? > I have located 3 Standard 4 foot, 10highx2wide file cabinets. 2 > Gray and one Orange/Red. > They are here in Columbus Ohio. I will be looking into shipping > options next week for those > who are interested. > I have seen the packing and shipping subject raised here numerious > times in the past, and > am open to current comments and suggestions. > > I will take my portable scale over next week and get their > measurements and a weight. Well, I'd like to know how much, but I expect shipping will be uneconomic. Please don't use too much of your time. I remember the cabinets as about 2 metres high, though maybe that was two 1 metre cabinets on top of each other. I suppose if I didn't stack them I could use the top as a worktop.

17 years, 7 months

pdp-12 diagnostic scans

by aek＠bitsavers.org

I have a large portion of the pdp-12 diags scanned. I'll try to get the tape diags up on bitsavers tonight.

17 years, 7 months

The Last of The Line

by RodSmallwood＠mail.ediconsulting.co.uk

Hi There seems to be some differing views as to how the boards would be arranged in an 11/94 to use 11/84 CPU Board and memory. I'll describe the 11/94 box I have. The box has label saying 11/94-EF The first three slots in the first nine slot backplan have four edge connectors. In the space where the other two edge connectors would have been are IDC connectors for ribbon cables going to the front panel. The rest of the slots (6) in first nine slot backplane have six edge connectors. The second nine slot backplane has nine slots with six edge connectors in each. The forth slot has the M8191 Unibus controller in it. The main discussion seems to be which comes first the cpu or the memory. There is also an issue around, are the first three slots a Q-Bus or not? Currently my understanding is any M8190 CPU and any M8637 memory So Slot one: M8190 Or M8190-AB 15Mhz Or M8190-AE 18Mhz Slot two/three MSV11-JD (1Mb) x 2 or MSV11-JE (2Mb) x 2 So can we get to a consensus as to which boards in what order are known to work? Rod Smallwood -----Original Message----- From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org] On Behalf Of Johnny Billquist Sent: 20 May 2007 20:14 To: cctalk at classiccmp.org Subject: Re: The Last of The Line Pete Turnbull <pete at dunnington.plus.com> skrev: On 20/05/2007 03:22, Jerome H. Fine wrote: >> > I have also read that the MSV11-JD and MSV11-JE boards should NEVER >> > be used together. Can anyone else confirm or deny this? > > No reason not to, except that you'd end up with an unusual amount of > memory (3Mbytes). It certainly won't hurt anything, though of course > you would need to set the start address of the lower board to the > correct value. It's settable to any 16KB (8KW) boundary. What do you mean "unusual amount"? I've been running one 11/83 like that for the last two years until today actually, when I upgraded to 4 megs. :-) I used to run my 11/84 like that as well. Currently it's shut down. Haven't had time to organize my computer room after I moved, so it just sits there... >> > I suspect that 3 * MSV11-JD boards may be used in a BA123 box with 4 >> > ABCD slots, but since I don't have any MSV11-JD boards, let alone 3 >> > of them, I can't verify this. > > I don't recall ever trying *that*, but it too would work, so long as you > set the start address of each board correctly, and again you'd end up > with 3Mbytes, which is an unusual amount. The manual just says you can > use "one or more MSV11-J memory modules", without mentioning size or > maximum number. 3 megs "unusual"? Hah! ;-) Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

17 years, 7 months

Floppy configurations on IBM PC 5150/5160

by mbbrutman-cctalk＠brutman.com

The standard floppy controller can drive up to four floppies, two internal and two external. And the motherboards of these machines have dip switches that allow you to tell them how many drives are connected. But those switches are just a simple count of drives, not which chain the drives are connected to. Normally I see these machines with two internal floppies, and nothing else. On the 5160 I have here in the office I am about to add an external floppy using the external connector on the floppy controller; the machine has a single drive installed internally now. How does the BIOS handle this situation? If I tell it that there are 2 drives will it try to figure out that one is internal and one is external? Do I need device driver help, or is this something the BIOS tries to handle? Is there something on the controller card I am supposed to do to tell it how the drives are connected/organized? Mike

17 years, 7 months

Semi-OT: VCR help?

by mouse＠Rodents.Montreal.QC.CA

I've got a VCR repair problem. (I thought it was just a broken drive belt, but apparently not.) Since this isn't really very on-topic (I doubt it's even ten years old), I'd prefer not to discuss it on-list. If anyone would be willing to lend a hand by email, could you write me off-list? I've set a reply-to pointing to two of my addresses, which between them give about as good a chance as is available that mail will actually reach me; in case the list mangles the reply-to, this means mouse at netbsd.org as well as mouse at rodents.montreal.qc.ca. /~\ The ASCII der Mouse \ / Ribbon Campaign X Against HTML mouse at rodents.montreal.qc.ca / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B

17 years, 7 months

FA: 2 Sierra InterAction magazines

by jefftnc＠compascable.net

I thought these were all gone...but found 2 more. Sierra InterAction magazines - Spring 1997 - Summer 1997 http://tinyurl.com/ypju9e Excellent condition, have owned since new. Auction ends Sunday 5/27. Thanks for looking, Jeff No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.472 / Virus Database: 269.8.0/818 - Release Date: 5/25/2007 12:32 PM

17 years, 7 months

grumpy

by jack.rubin＠ameritech.net

> Date: Sat, 26 May 2007 11:37:51 -0600 > From: "Michael B. Brutman" <mbbrutman-cctalk at brutman.com> > Subject: Re: Floppy configurations on IBM PC 5150/5160 > To: General Discussion: On-Topic and Off-Topic Posts > <cctalk at classiccmp.org> > Message-ID: <4658706F.4070802 at brutman.com> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > > I understand that the nickname is 'Grumpy Old Fred', but it > is necessary > to YELL because I got the existence/non-existence of the twist in the > cable backwards? > > If I had said that the cause of the drive ID weirdness was because I > have my US electrical socket installed with the grounding pin facing > downward then I could understand the caps lock for emphasis, > but in the > grand scheme of things that was really a minor nit. > > > > Fred Cisin wrote: > > On Fri, 25 May 2007, Michael B. Brutman wrote: > >> For some strange reason, the IBM 4865 external drive unit > that I am > >> using showed up as drive number 3, not 2. (Counting from zero, of > >> course.) I wonder if there is a twist in the internal cabling, or > >> the drive select jumper is non-standard on this one. No > problem it > >> works just fine. > > > > a LACK OF A TWIST will do that > > > > > > yeah - happy holidays (stateside) Jack No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.472 / Virus Database: 269.8.0/818 - Release Date: 5/25/2007 12:32 PM

17 years, 7 months

Nice PC-museum..

by dkelvey＠hotmail.com

>From: "Ensor" <classiccmp at memory-alpha.org.uk> ---snip--- > >I'd like to think that if the 68k had been chosen we'd have had far more >advanced PCs far quicker (I'm thinking back to the many 68k implementations >of UNIX amongst other things). But I do take your point about the >availability of software, let's face it, the *ONLY* reason I switched from >my Atari ST to the PC was software. > >Although....if we'd had 68k/UNIX based boxes on our desktops instead of >8086/DOS who's to say that there wouldn't have been a similar explosion of >software? Hi I think most software people would agree but that hard fact is that main memory is way behind processor speeds. This means that the more compact the instruction stream is, the faster the processor can run. We are quickly reaching the limits of clever caching, even for CISC processors like the X86 machines. I'm not saying that RISC machines are dead, just the opposite. Every X86 machine today has a RISC engine inside. I expect that the next generation processor will be even more CISC like and less RISC like to the external software. Memory bandwidth will dominate choices. Just my thoughts Dwight _________________________________________________________________ PC Magazine?s 2007 editors? choice for best Web mail?award-winning Windows Live Hotmail. http://imagine-windowslive.com/hotmail/?locale=en-us&ocid=TXT_TAGHM_migrati…

17 years, 7 months

Dolch Ruggedized laptop Power Plug?

by ethan.dicks＠gmail.com

Not 10 years old, but definitely counts as unusual hardware... I bought a Dolch A320T ruggedized laptop at Dayton from a friend who was in from NJ and selling a few rows away from Dan Cohoe, but part of the reason it was so in expensive was that it didn't have an AC adapter. The laptop came with a hand-fashioned bit of cut PCB with leads, meant to plug into a lab-top bench supply (19V @ ~3A), but I'd like to at least get a "real" plug for it. The problem is that while it looks like an "ordinary" 2.5mm co-ax DC power connector, the center pin is mighty fat. My question is, how does one describe these sorts of connectors in enough detail to get the right part when ordering one? A standard, modern Dell PA-12-type brick pumps out 19.5V @ 3.33A, so that's not so much of an issue, just locating a mating connector is. Thanks for any help determining how to describe this. -ethan

17 years, 7 months

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test-drb May 2007