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101090 discussions

Core Memory: a Visual Survey of Vintage Computers book

by jws＠jwsss.com

I just got my copy of the Core memory book. Very nice work. I noticed there is what I think may be a mis-identified system in the front. It shows an Apollo system of some sort, but identifies it as an Apollo Guidance computer. I went back and forth a few times and convinced myself it was wrong. It is a very nice book. I've got a few of the systems photographed, which is nice as well. Jim

11 years, 7 months

Wanted: MLR1 Cleaning Cartridge and/or Media

by Kevin＠RawFedDogs.net

Classic Computer Fans, My IBM 9406-270 came with an internal MLR1 tape drive. I recently acquired a tape to test it with. I was able to initialize the tape and save/restore a small test library without errors. I ran a read/write reliability test and that failed. It said it was a 95% chance that it's a hardware problem and a 5% chance it's a media problem. The drive is asking to be cleaned. I'm hoping that it's a media problem or that the drive just needs to be cleaned. Does anyone have an MLR/SLR cleaning cartridge and/or any MLR1 media to spare? -- Kevin http://www.RawFedDogs.net http://www.Lassie.xyz http://www.WacoAgilityGroup.org Bruceville, TX What's the definition of a legacy system? One that works! Errare humanum est, ignoscere caninum.

11 years, 7 months

Multiple IBM System/23 Datamasters, and more, available in upstate NY

by tosteve＠yahoo.com

Adam sent me this information, contact him below if interested in these "rare and valuable" systems: ================================================================================================ I have come across the following IBM system/23 models in good condition. They were covered and stored in a clean attic since the mid-late 80's. (1) 5322 - all-in-computer (2) 5324 - modular computer (2) 5242 - printer (1) 5247 - external disk storage (2) terminals - ??? We will probably store these until summer 2015 if we can't find a good home for them they might end up junked. Adam Wheeler adam at deluxedistributors.com Upstate NY =================================================================================================

11 years, 7 months

VERY ODD BURROUGHS PHOTO...2 story pile of data binders...Pasadena? http://ww

by COURYHOUSE＠aol.com

VERY ODD BURROUGHS PHOTO...2 story pile of data binders...Pasadena? http://www.smecc.org/burroughs.htm go to bottom of page.. seems to be a 2 story pile of data binders... is this Burroughs Pasadena? who are these people? I think we have the whole Burroughs office lined up! this is from the Jack Aldridge collection at SMECC we finally got a scanner to scan larger negatives Ed Sharpe Archivist for SMECC email us please we do not check the list all the time

11 years, 7 months

PDP-8 for sale

by jnc＠mercury.lcs.mit.edu

So there's a PDP-8 for sale on eBay, and it's not up with a stupidly massive BiN number, but an actual auction with a reasonable start price: http://www.ebay.com/itm/231424380705 8's aren't my thing, but I'm sure someone here would be interested in this... Noel

11 years, 7 months

Source for N* Advantage hard disk BIOS?

by snhirsch＠gmail.com

Is this available anywhere? I have only been able to find the floppy BIOS disassembly for Horizon. --

11 years, 7 months

PDP-8 For Sale

by bob＠theadamsons.co.uk

> Looking at the 8 listing that started this, the thing I noticed was that it has the memory sense/inhibit board > but not the address drivers or the core plane. I wonder if the latter is on somebody's wall :-( > > -tony I think he's just quoting the card numbers from the handles. Looks as though the whole (3-card) stack is there OK. Bob

11 years, 7 months

Weekly Classic Computer Trivia Question (20141215)

by dpi＠dustyoldcomputers.com

OK, so somewhat weekly questions. Back in the days of high speed line printers there was a characteristic of drum style printers that made the output print style quite distinct. What was this characteristic? I don't miss the noise of those devices and it seemed like no matter how careful you were when changing the ribbon you would smudge your hands. Doug Ingraham

11 years, 7 months

Strange Problem on DECstation 2100

by robert.jarratt＠ntlworld.com

I have been trying to get my 2100 working. I have been using MOP to boot the machine and try to install Ultrix, although this is not working for some other reason at the moment. Until this morning, it was booting from MOP just fine, but now it, after leaving the machine overnight and not doing anything to it, I get this when I try to MOP boot: Ultrixload - V4.5 Thu Sep 14 07:07:53 EDT 1995 Excptn: (vtr=NRML) Excptn pc: 0x807001f8 Creg: 0x30000010(CE=3,EXC=RADE) Sreg: 0x30000000(CU1,CU0,IPL=8) Vaddr: 0xaaaaaafe Sp: 0xa13fbba8 0xa13fbba8 : 0xaaaaaaaa 0x80701310 0xa0003b60 0x80700000 0xa13fbbb8 : 0xaaaaaaaa 0xaaaaaaaa 0xaaaaaaaa 0xaaaaaaaa 0xa13fbbc8 : 0xaaaaaaaa 0xaaaaaaaa 0xaaaaaaaa 0xaaaaaaaa 0xa13fbbd8 : 0xaaaaaaaa 0x80700048 0xa00039c8 0xaaaaaaaa 0xa13fbbe8 : 0xaaaaaaaa 0xaaaaaaaa 0xaaaaaaaa 0x00000000 0xa13fbbf8 : 0xaaaaaaaa 0xaaaaaaaa 0x00000001 0xa00039c8 exit(-1) The really strange thing is that if I attach a CD-ROM drive and boot off that first, then try the MOP boot after that, the MOP boot works! Before anyone asks, I have other problems which mean it won't successfully install Ultrix from the CD-ROM, and I am trying the MOP route because of this. The CD-ROM problem is something to do with the block size, I know about the block size jumper and have tried with the jumper installed and removed. I have a workaround which is to connect the CD-ROM, boot off the CD-ROM, let the CD-ROM installation fail, then unplug power from the CD-ROM and boot >from MOP. But that is horrible, and wasn't necessary until this morning. Any ideas? Regards Rob

11 years, 7 months

Need HVPS for old Laserjet IIp printer

by charlesmorris800＠centurytel.net

I?m trying to find the high voltage power supply board for my old LaserJet IIp+ printer. Several places claim to sell them, but as soon as you order, within a day or two, they are mysteriously ?out of stock, sorry for the error?. A good used one would be fine. thanks for any help. -Charles

11 years, 7 months

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