test-drb December 2011

test-drb@ccmp.vtda.org

194 participants
247 discussions

by cisin＠xenosoft.com

WHAT brand and model computer are you talking about? On Tue, 27 Dec 2011, Enrico Lazzerini wrote: > Well this is all i know: > 8" > STAT d:DSK: > 9600 r: 128 Byte Record Capacity > 1200 k: Kilobyte Drive Capacity > 128 d: 32 Byte Directory Entries > 128 c: Checked Directory Entries > 128 e: Records/ Extent > 16 b: Records/ Block > 64 s: Sectors/ Track > 2 t: Reserved Tracks > 2 SIDES > This is that I calculate: > BEGIN SCO2 (1024 bytes/sector) - DSDD 8" > DENSITY MFM ,HIGH 1200K disk capacity is close to maximum for an 8" diskette. It is what you expect from 8" DSDD. "High" would be incorrect usage, but >from a 5.25" perspective, it fits. > CYLINDERS 77 SIDES 1 SECTORS 8,1024 NO. You can not get 1200K disk capacity from single sided. > SIDE1 0 1,2,3,4,5,6,7,8,9 > SIDE2 0 1,2,3,4,5,6,7,8,9 Those are 10 sectors per side. You said 8 Are you sure that that is the sector sequence? > Here what 22disk tell me: > http://elazzerini.interfree.it/Foto2982.jpg > Where I'm wrong? 1) Instead of transcribing some text, you sent a URL to a picture that is more than 2 MEGAbytes. (a photograph of your screen?) THANK YOU for sending the URL instead of attaching it! A) Not everybody reads their mail in a web browser. Sending a URL requires cut and paste to get it TO the web browser. B) Believe it or not, some of us use dial-up! 2M takes too long. C) Surely that file could be MUCH smaller. Thats a kilobyte for each character on the screen. Was it an error message? That would only call for a few lines of text. Was it a scrambled display, such as non-ASCII characters in filenames? 2) You are posting asking for technical support for an unregistered copy of a program on a forum where the author is an active participant! If you REGISTER the program, then he will provide support, maybe even an updated copy of the program, etc. (It may have additional formats now!) You didn't tell us the name of the format. You didn't tell us the form of your calculations. Were they a wild guess? or did you look at sectors on the disk to determine them? What "side-pattern" is it? Does it alternate sides before incrementing cylinder, or does it increment cylinder first, and use the first side before starting on the second? Does it then go UP the second side, or DOWN? You didn't provide us with hex dumps of the directory sectors. NO, DO NOT SEND US MORE PHOTOGRAPHS! If the problem is in the directory, then let's see THAT! It's 32 bytes per directory entry/extent - depending on what the problem is, it might not take more than a few.

12 years, 4 months

Data General computer

by a50mhzham＠gmail.com

At 07:47 PM 11/30/2011, you wrote: >m88k Systems use standard SCSI and can use anything up to 2GB without a >problem. I have DG/UX 5.?? on CD and 4.?? on Tape here. As far as I know, the one we have uses standard SCSI (as opposed to what? Diff?) as well. >-Matt > >On Wed, Nov 30, 2011 at 7:35 PM, Jules Richardson < >jules.richardson99 at gmail.com> wrote: > > > Tom wrote: > > > >> I might be soon coming into possession of some Data General stuff. Maybe > >> an Aviion 66. There's a second one, maybe a model 37? I'm not sure. No > >> drives. I'm going to see what's there and post the inventory in the next > >> few weeks. I've never heard of any demand for these; anyone know if there > >> would be any interest? > >> > > > > Well the m88k-based systems tickle my interest (for no other reason than > > the choice of CPU) - I think they switched over to boring ol' Intel at some > > point, though :-) > > > > I don't know how widespread copies of the OS are, and if there are any > > 'gotchas' involved with rebuilding a machine that's lacking disks... > > > > cheers > > > > Jules > > > > 471 . [Commentary] It is better to keep your mouth shut and appear stupid than to open it and remove all doubt. --Twain NEW: a50mhzham at gmail.com ? N9QQB (amateur radio) "HEY YOU" (loud shouting) ? Second Tops (Set Dancing) ? FIND ME ON FACEBOOK 43? 7' 17.2" N by 88? 6' 28.9" W ? Elevation 815' ? Grid Square EN53wc LAN/Telecom Analyst ? Open-source Dude ? Musician ? Registered Linux User 385531

12 years, 4 months

(OT) New Years greetings

by oe5ewl＠gmail.com

My best wishes for the new year 2012 fly out to all subscribers of this nice list! Time to say thank you to all who contributed and helped out with the questions I had! Have a nice new-years celebration and day, Regards, Wolfgang -- Wolfgang Eichberger - OE5EWL Operating System Collector Blog: 5ewl.blogspot.com Homepage: www.eichberger.org

12 years, 4 months

russian PDP-11 like K1801BM2 CPU Startup reading w/o address?

by dmonnens＠gmail.com

Holm, I asked one of my colleagues who is working on computer research in Ukraine. He did not have a direct answer to your question, but provided these sources to check for solutions to your problems: http://forum.maxiol.com/index.php?showtopic=4599 - look here http://ramlamyammambam.livejournal.com/149983.html?format=light - ask here or maybe here: http://ru-radio-electr.livejournal.com/229706.html?thread=3609418&format=li… - I know user suvorow_ as a good specialist. -Devin Monnens > ------------------------------ > > Message: 14 > Date: Sat, 3 Dec 2011 16:44:24 +0100 > From: Holm Tiffe <holm at freibergnet.de> > To: cctech at classiccmp.org > Subject: russian PDP-11 like K1801BM2 CPU Startup reading w/o address? > Message-ID: <20111203154424.GA56131 at pegasus.freiberg-net.de> > Content-Type: text/plain; charset=iso-8859-1 > > > I want to play with a russian K1801BM2 CPU (K1801VM2). > My russian from the school is very very rusty and so I have problems to > understand what's going on with this CPU while startup. > There is some "besadresnoe tschtanie", a read from the bus w/o > sending out an address before w/o active SYNC. > It is right, that this read is building the upper 8 bits from the start > address in the rom area with Systemu Mode (Halt Mode) = 1? > Can anyone please confirm this? > > BTW: how is this external register to be done in HW? > > Does anyone know if there are schematics of SBCs existing w/o special > support ICs like The K1801VP1-55 or so? > > Kind Regards and thanks in advance, > > Holm > -- > Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe, > Freiberger Stra?e 42, 09600 Obersch?na, USt-Id: DE253710583 > www.tsht.de, info at tsht.de, Fax +49 3731 74200, Mobil: 0172 8790 741 > > -- Devin Monnens www.deserthat.com The sleep of Reason produces monsters.

12 years, 4 months

Computer like no other,unique

by dave.thearchivist＠gmail.com

We on IRC want to know how rare/what this is http://www.ebay.com/itm/Computer-like-no-other-unique-/150724230097 Although the salesmanship is depressingly common! Dave Caroline

12 years, 4 months

XT-IDE V2 PCBs

by LYNCHAJ＠YAHOO.COM

Hi!? I just received an email from the PCB manufacturer and they?ve shipped the XT-IDE V2 PCBs.? These PCBs allow you to use parallel IDE drives (or CF with adapters) on 8 bit ISA bus legacy PC/XT or similar computers. Generally speaking, the XT-IDE with parallel IDE drives and/or CF adapters are more reliable and readily available than legacy ST506/ST412 MFM/RLL hard drive subsystems. As before, these PCBs will be $12 each plus $2 shipping in the US and $5 elsewhere. These are the Do-It-Yourself PCBs based on the plain TTL chip technology like the XT-IDE V1 boards.? More information can be found here http://n8vem-sbc.pbworks.com/w/browse/#view=ViewFolder&param=XT-IDE%20V2 Thanks and have a nice day! Andrew Lynch

12 years, 4 months

scanning and conversion questions

by dgriffi＠cs.csubak.edu

Since several people here do this kind of thing, I figured I'd ask here. I'm trying my hand at scanning stuff to PDF. The only thing I seem to find for doing this in Linux is Simple Simple Scan. I'm scanning in photo mode because text mode is unacceptably grainy. My problem now is converting the resulting jpg into a pdf. ImageMagick is the obvious tool for this, but no matter what I do, the resulting pdf is grainy. How can I tell ImageMagick to not diddle with the quality? -- David Griffith dgriffi at cs.csubak.edu A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?

12 years, 4 months

4x16K Datacraft core memory rack units available

by dm561＠torfree.net

----- Original message: Date: Sat, 31 Dec 2011 10:16:50 -0500 From: B Degnan <billdeg at degnanco.com> To: cctech at classiccmp.org Subject: Re: 4x16K Datacraft core memory rack units available Message-ID: <201112311517.pBVFH8TB047885 at billy.ezwind.net> Content-Type: text/plain; charset="us-ascii"; format=flowed > > These are general purpose core that can be used in more than just the > > Burroughs minis they came from. ?I know for example that a rack like > > this > > could be used with an S-100 computer or 8008 system. > >What Burroughs minis? 6000 series I assume, specifically I was told these came from a prototype system (?) from the early 1970's, and were then surplused after light use. ------------- I'd hardly call a Burroughs 6x00 a "mini"... http://www.retrocomputingtasmania.com/home/projects/burroughs-b6700-mainfra…

12 years, 4 months

John Sculley interview part 1 posted

by david＠classiccomputing.com

>> Please have a listen when you can. [...] > >> http://bit.ly/tmoDTL > > I had a look, but lynx didn't show me anything useful. Manually > fetching and looking at it, I don't see anything amid the blizzard of > HTML that I recognize as a reference to a soundfile - y'know, something > listenable on classic computers (many of which, eg, my SPARCs, do have > sound output hardware). But I'm probably missing something, because I > also see some things that look like errors to my minimal knowledge of > HTML, things like <a href='$manage-app-url$'>. > > So, where's the soundfile hiding? Hi Mouse, Sorry, I'm not so good at the tech of RSS and so on . . . that's why I use a Mac and iWeb, etc. But . . . I also post the files somewhere so they can be directly downloaded, so please try here - https://public.me.com/dgreelish Best, David Greelish, Computer Historian President, Atlanta Historical Computing Society Classic Computing The Home of Computer History Nostalgia http://www.classiccomputing.com Classic Computing Blog Retro Computing Roundtable podcast "Stan Veit's History of the Personal Computer" audiobook podcast Classic Computing Show video podcast

12 years, 4 months

IBM 360 model 65 docs wanted

by iamcamiel＠gmail.com

A friend of mine who was a software engineer at Digital Equipment Corporation gave me a console panel for a System/360 model 65 that they had in their office (the console panel, not the system). I am restoring the console panel, and I'm creating an interface to a PC to make all the lights and switches work as originally intended. I'm keeping a blog of my progress at <http://ibm360-console.blogspot.com> http://ibm360-console.blogspot.com. I'm now looking for field engineering documentation (hardcopy or scans/pdfs) in order to make the emulation as faithful as possible to the original. These are some of the document titles I'm looking for: System/360 Model 65, 2065 Processing Unit, Field Engineering Maintenance Manual System/360 Model 65, 2065 Processing Unit, Field Engineering Diagrams Manual System/360 Model 65 Field Engineering Manual of Instruction System/360 Model 65 Field Engineering Theory of Operation Manual System/360 Model 65 CPU and Channels Training, Field Engineering Education Supplementary Course Material The same material for the model 60, 62 or 67 instead of the 65 would help too, given the similarities between these machines. One thing in particular that I'm looking for that would help a lot is a data flow diagram showing the register and bus names. Another thing that would be very useful is a listing of the BCROS microcode. The functional characteristics manual (which is available on Bitsavers) doesn't offer the level of detail I'd like. Cheers, Camiel

12 years, 4 months

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test-drb December 2011