test-drb

test-drb@ccmp.vtda.org

101090 discussions

by jimw＠agora.rdrop.com

THrowing in my $0.02 here... At 09:07 PM 9/18/98 -0700, Sam wrote: > >Ok, so I have a 15W bulb in series with the P/S and it lit up. The fan >didn't start blowing until the second time I powered up, but its blowing, >albeit very slowly due to the limited power I assume. When its powered down, give the fan a spin with your finger. It should spin freely. If not, it should be replaced. The older bronze/oilite bearings dried out and would start to stiffen up after a souple of years of operation. >I didn't go the full Tony route because doing so would've required >desoldering the entire transformer which wasn't an attractive prospect. True 'nuff... Unless you got a very early IMSAI with the point-to-point wires PS. >I measured the voltages across a power connector and got 9.4V, +17.56 and >-17.86. A little high but I attribute that to a lack of a load. That is actually pretty much normal. Keeping in mind that the mains on the S-100 bus are unregulated and spec'd (such as it is) at +8 and +/-16VDC to allow for drop under load without falling out of the 'comfort' range for the regulators on the individual boards. >At this point I feel pretty comfortable that the P/S is working pretty >well, which surprised me. I expected a fight (but was hoping for the >results I got). These old machines just refuse to die. The big 'can' caps are a good deal harder to kill than the minis... >I'm going to let it warm up for about an hour before I start plugging in >boards. Never can be too safe. In the case of my PDP-8/i which had not been fired in a known 10+ years, once I had the supplied spun up I ran it in under (auto) lamp loads for a little over 6 hours (frequently checking for ripple with a 'scope) before I started reconnecting logic. But thats just me... B^} So... 'fess up. Is this the 'door prize' IMSAI? -jim --- jimw(a)agora.rdrop.com The Computer Garage - http://www.rdrop.com/~jimw Computer Garage Fax - (503) 646-0174

27 years, 11 months

Quantum Q540 as a RD52

by CLASSICCMP＠timaxp.trailing-edge.com

>Not a silly question in the least. Sort of falls in the "now why didn't I >think of that" catagory! In all cases except 1 DS1 was jumpered, on the >one exception, nothing is jumpered. Set it to DS2, no luck, set it to DS3 >and it works. Thanks! This falls into the category of "my 11/73's line time clock quit working" :-). *Extremely* common problem, extremely simple answer! >Next question, does anyone happen to have the list of correct answers to >give the formating program written down anywhere? Yes, I'm lazy enough not >to want to have to figure that out. Roger Ivie posted the following many, many years ago. It's for the RD51, not the RD52, but it should get you started. One tiny note: Roger didn't figure out the Media ID scheme, but if you look at the source code to my DUSTAT utility (i.e. take a look at: http://sunsite.unc.edu/pub/academic/computer-science/history/pdp-11/rt/dust… ) and look at my comments there about how the media type code is represented. -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology Voice: 301-767-5917 7328 Bradley Blvd Fax: 301-767-5927 Bethesda, MD, USA 20817 I've come across the notes I used to format an RD51 (that's a 10MB disk, folks) on a VS2000. When I was done, I was able to mount the disk under VMS. Here's what my notes say: An XBN is a block containing geometry info for the drive. DBNs are the blocks between the XBN and the end of the cylinder; essentially, the first cylinder of the drive is reserved to contain geometry info, but not all of the blocks in the cylinder may be used. DBNs fill out the first cylinder after all the XBNs are filled in. LBNs are blocks containing user data. RBNs are replacement blocks. RCTSIZ appears to be the size of the replacement block table in blocks, but I have a ? after my note on that one. RCTNBR appears to be the number of copies of the RCT on the disk, again I've makred that with a ?. Here were my answers to the questions for the RD51. The RD51 has 305 cylinders and 4 heads. I'm pretty certain the VS2000 and RQDX3 use 17 sectors/track (the RQDX2 used 18 sectors/track; reformatting a disk with an RQDX3 drops its capacity slightly): XBNSIZ: 54 I used 54 because all the info I've seen for other drives used 54. DBNSIZ: 14 A cylinder on the RD51 has 68 blocks. After the 54 XBN blocks are allocated, 14 blocks are left in the cylinder. LBNSIZ: 20000 I just winged this one. You should be able to twiddle this up or down by playing with the replacement blocks. RBNSIZ: 168 I think I picked this because that's what an RD52 uses, but I don't remember. SURPUN: 4 The RD51 has four heads. CYLPUN: 305 The RD51 has 305 cylinders. WRTPRC: 305 I don't remember where write precomp is supposed to be turned on for the RD51, so I turned it off for the whole drive. This should be the cylinder number where write precomp starts. RCTSIZ: 4 Again, taken from the RD52 RCTNBR: 8 Again, taken from the RD52 SECITL: 1 Sectors should be number 1 through 17 instead of 0 through 16. STSSKW: 2 Head-to-head skew in sectors. The RD52 also uses 2. CTCSKW: 14 Cylinder-to-cylinder skew in sectors. I don't remember why I picked 14; some experimentation should let you figure out what to use here. MEDIAI: 627327027 I'm pretty sure I looked in the source listings to see what the driver was expecting for an RD51. Short of doing that, I don't know what else to do here. I don't know if this number is really critical for antyhing; the driver should use the XBNs to get the geometry information instead of depending on the media ID to look it up.

27 years, 11 months

DECmates up for grabs - contact original poster

by mbg＠world.std.com

>Xref: world comp.sys.dec.micro:8719 >Path: world!nntprelay.mathworks.com!news-peer.gip.net!news.gsl.net!gip.net!portc01.blue.aol.com!audrey01.news.aol.com!not-for-mail >From: whoagiii(a)aol.com (WHoagIII) >Newsgroups: comp.sys.dec.micro >Subject: Re: Looking for WPS-Plus DOS and DECmates >Lines: 9 >NNTP-Posting-Host: ladder01.news.aol.com >X-Admin: news(a)aol.com >Date: 21 Sep 1998 18:15:47 GMT >Organization: AOL http://www.aol.com >References: <6tbn9i$8gt8$1(a)newssvr04-int.news.prodigy.com> >Message-ID: <19980921141547.20548.00002820(a)ng119.aol.com> I have several decmate IIs and IIIs that are going to be scrapped. I would be happy to sell one or all. $20 each plus shipping. I have 4 or 5 IIIs and a couple of IIs I think. I am in Portland, Oregon Thnks, Paxton Hoag whoagiii(a)aol.com WhoagIII(a)aol.com

27 years, 11 months

Shoe collectors?

by dastar＠ncal.verio.com

You people thought you were weird. Would you believe there's an article in the Wall Street Journal today about people who collect (and pay outrageous eBay sums for)--get this---old sneakers? A pair of some Nike something-or-others sold for $2,300 on ebay, and some fetch up to $5,000. And we thought all the money was in Altairs. I'm sorry, but sneakers I can not understand. Computers, yes. Beanie babies, maybe. Sneakers?? Sam Alternate e-mail: dastar(a)siconic.com ------------------------------------------------------------------------------- Ever onward. September 26 & 27...Vintage Computer Festival 2.0 See http://www.vintage.org/vcf for details! [Last web site update: 09/21/98]

27 years, 11 months

Shoe collectors?

by roblwill＠usaor.net

Hey, You never know when you'll be put up against the forces of CHAOS, Max. :-) -- -Jason (roblwill(a)usaor.net) ICQ#-1730318 ---------- > From: CLASSICCMP(a)timaxp.trailing-edge.com > To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> > Subject: RE: Shoe collectors? > Date: Monday, September 21, 1998 11:02 PM > > You know what I always wanted? A shoe phone. And with today's technology, > it'd be easy to do. (I'd have to learn some about shoe repair, but I > wouldn't mind.) Put that together with my cone of silence, and... > > -- > Tim Shoppa Email: shoppa(a)trailing-edge.com > Trailing Edge Technology Voice: 301-767-5917 > 7328 Bradley Blvd Fax: 301-767-5927 > Bethesda, MD, USA 20817

27 years, 11 months

Shoe collectors?

by CLASSICCMP＠timaxp.trailing-edge.com

>You people thought you were weird. Would you believe there's an article >in the Wall Street Journal today about people who collect (and pay >outrageous eBay sums for)--get this---old sneakers? You know what I always wanted? A shoe phone. And with today's technology, it'd be easy to do. (I'd have to learn some about shoe repair, but I wouldn't mind.) Put that together with my cone of silence, and... -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology Voice: 301-767-5917 7328 Bradley Blvd Fax: 301-767-5927 Bethesda, MD, USA 20817

27 years, 11 months

Tandy 600 questions

by tomowad＠earthlink.net

I purchased a Tandy 600 at the York Hamfest on Sunday. The unit doesn't seem to work - the screen fills up with garbage (just alternating pixels, about 75% black). Anybody know what could cause this? I'm trying to take the unit apart so I can look at it, but its not opening up very easily. Are there screws under the four rubber feet on the bottom? They're in so good I'd have to tear them apart to get them out, which I hate to do unless I know there are actually screws under it. Thanks. Tom Owad -- Sysop of Caesarville Online Client software at: <http://home.earthlink.net/~tomowad/>

27 years, 11 months

Tandy 600 questions

by roblwill＠usaor.net

Don't take apart. The only time you should have to do this is when you need to replace the battery pack. Here's what you should do: Perform a cold start. Before you perform a cold start, be sure the RAM Memory switch on the bottom of the computer is ON. Then, briefly press the [BKSP], [ALT], [LABEL], and [POWER] keys at the same time. Release the [POWER] key first, then the others. All data files stored in memory are erased, and the System Manager screen appears. If this doesn't work, turn off the RAM switch, and try everything again after a minute. Just remember to turn the RAM switch back on before you do. GooD LucK, -- -Jason (roblwill(a)usaor.net) ICQ#-1730318 ---------- > From: Tom Owad <tomowad(a)earthlink.net> > To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> > Subject: Tandy 600 questions > Date: Monday, September 21, 1998 9:06 PM > > I purchased a Tandy 600 at the York Hamfest on Sunday. The unit doesn't > seem to work - the screen fills up with garbage (just alternating pixels, > about 75% black). Anybody know what could cause this? > > I'm trying to take the unit apart so I can look at it, but its not > opening up very easily. Are there screws under the four rubber feet on > the bottom? They're in so good I'd have to tear them apart to get them > out, which I hate to do unless I know there are actually screws under it. > > Thanks. > > Tom Owad > > -- > Sysop of Caesarville Online > Client software at: <http://home.earthlink.net/~tomowad/> >

27 years, 11 months

Quantum Q540 as a RD52

by CLASSICCMP＠timaxp.trailing-edge.com

>VSfmt_RES_ERR #2 > 84 FAIL > >It does this for each of the drives. The drives "sound good" for what it's >worth. Is there some special trick to getting a Q540 to act like a RD52 Really silly question: what have you set the drive select jumper to on the Q540's? Generally on VAXen you have to set the DS to the third position (DS3 if it starts at one, DS2 if it starts at zero.) -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology Voice: 301-767-5917 7328 Bradley Blvd Fax: 301-767-5927 Bethesda, MD, USA 20817

27 years, 11 months

Linux on S/370? Was: Re: printer socket (Off topic)

by Marty＠itgonline.com

How many DeForest double wing audions did Chris drop? Did they bounce or shatter? Marty ______________________________ Reply Separator _________________________________ Subject: Re: Linux on S/370? Was: Re: printer socket (Off topic) Author: classiccmp(a)u.washington.edu at internet Date: 9/21/98 11:16 AM > Less S/370s out there? I would think, since they are more recent vintage, > there would be more. Any reason why? I'll keep my eyes peeled for you though. I think is simply the prestige of the S/360s. After all, they are probably the single most influential computer family of the 1960s. The S/370s just do not have the same magic in their name. > Yeah, even my beige box 9370 is boring as heck to look at :-( (It's a CMOS > version of the S/370 from 1987/88.) No interesting front panels, can't > tinker with hardware much at all, etc. Pah! Even the last of the machines tagged "System/370" started to lose their panels. By the time the 3033 and 4331 came out (mid to late 1970s), the panels were gone. IBM used the same cabinets until recently switching over to the black and red (very sharp looking) S/390s. S/370 panels are amazing. Unlike the S/360 panels, they are black with all sorts of color coding, and liberal use of the hexadecimal knobs for setting the registers. I would like to find a picture of any old S/370 on the Web, but I have not come accross one yet. > Christian Fandt, Electronic/Electrical Historian Lets give Chris a big hand for being an Auction helper at the Antique Wireless Association meet in Rochester, NY just a few weeks ago. He did not drop too many things. William Donzelli william(a)ans.net ------ Message Header Follows ------ Received: from lists2.u.washington.edu by smtp.itgonline.com (PostalUnion/SMTP(tm) v2.1.9i(b5) for Windows NT(tm)) id AA-1998Sep21.111603.1767.64703; Mon, 21 Sep 1998 11:16:04 -0400 Received: from host (lists.u.washington.edu [140.142.56.13]) by lists2.u.washington.edu (8.8.4+UW97.07/8.8.4+UW98.06) with SMTP id IAA21788; Mon, 21 Sep 1998 08:14:03 -0700 Received: from mxu1.u.washington.edu (mxu1.u.washington.edu [140.142.32.8]) by lists.u.washington.edu (8.8.4+UW97.07/8.8.4+UW98.06) with ESMTP id IAA20766 for <classiccmp(a)lists.u.washington.edu>; Mon, 21 Sep 1998 08:13:53 -0700 Received: from il1.nyp.ans.net (il1.nyp.ans.net [147.225.190.5]) by mxu1.u.washington.edu (8.8.4+UW97.07/8.8.4+UW98.06) with SMTP id IAA29679 for <classiccmp(a)u.washington.edu>; Mon, 21 Sep 1998 08:13:52 -0700 Received: by il1.nyp.ans.net id LAA05654 (InterLock SMTP Gateway 3.0 for classiccmp(a)u.washington.edu); Mon, 21 Sep 1998 11:13:50 -0400 Received: by il1.nyp.ans.net (Internal Mail Agent-1); Mon, 21 Sep 1998 11:13:50 -0400 Message-Id: <Pine.GSO.3.96.980921110102.13855C-100000(a)titan.purch.ans.net> Date: Mon, 21 Sep 1998 11:13:50 -0400 (EDT) Reply-To: classiccmp(a)u.washington.edu Sender: CLASSICCMP-owner(a)u.washington.edu Precedence: bulk From: William Donzelli <william(a)ans.net> To: "Discussion re-collecting of classic computers" <classiccmp(a)u.washington.edu> Subject: Re: Linux on S/370? Was: Re: printer socket (Off topic) In-Reply-To: <199809211438.OAA21109(a)cyber2.servtech.com> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN

27 years, 11 months

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