test-drb September 2014

test-drb@ccmp.vtda.org

188 participants
251 discussions

by earl＠baugh.org

> From: Jay West <jwest at dewey.classiccmp.org> > Subject: Recent Downtime of Bitsavers & Manx > > Greetings folks. > My sincere apologies for the "unannounced downtime" for manx a few days > ago. > The downtime was to install a new 33TB NAS, which will allow us to at least > double the disk space available to manx (and other classiccmp-hosted > sites). > You're welcome Richard. > Jay West > PS - you may see "that is what you get for free", all I see is the $$$ > I just spent on a 33TB NAS. Again, you're welcome. I see this as an awesome magical upgrades and that someone cares for stuff I get for free but really appreciate! Doesn't get much better than that! :-) Thanks Jay for the upgrade!! (Now if I ever win the lottery I can set up another bitsaver node and help you out with the $$$ of the NAS... :-) ) Earl

10 years, 3 months

CARDIAC simulator

by mtapley＠swri.edu

Brian, On Sep 18, 2014, at 7:06 PM, Brian wrote: > It's starting to look like we might be using this simulator in our Intro > to CS class here at Drexel this quarter. ... Yup! That looks so cool I talked my daughter into trying it on her iPad 1, iOS 5.1. It works! She?s taking a self-paced CS intro course this fall. I think this may have just gotten added to her curriculum. What are some reasonable Exercises I could assign her? Is there a list of problems from the manual that?s posted somewhere? - Mark

10 years, 3 months

Using an 8" drive on a PC (WAS RE: "Smartcom II" package

by billdeg＠buzz1.com

> A lot will depend on what you want to do. <snip> I was able to make a 8" DOS 6.22 boot disk, but you have to play around with the 77 vs 80 tracks issue when spoofing a 1.2M 5 1/4" drive. Or just ignore the errors at the end of the format, as it will still work enough to get by. I told the computer BIOS I had a 1.2M 5 1/4" drive in A, and used the DBIT adapter to connect to the 8" drive. It may matter what side of the twisted drive cable the adapter is placed, so you'll have to play around with it. I am assuming your drive controller and computer are compatible with the hardware. Format complete, use SYS command from DOS to move boot files to the disk to make it bootable. Once you have the disk formatted it seems to work just fine as a DOS diskette like any other, at least in my disk imaging system. You can walk around and tell people you have a 8" boot drive on your PC, but it's not as exciting to others as you might think.....ug. Anyway I made a thread on my site about my adventures with imaging disks et al http://vintagecomputer.net/browse_thread.cfm?id=561 Bill

10 years, 3 months

Gordon Bell wins S. Cray Award

by jnc＠mercury.lcs.mit.edu

> Gordon Bell, 'Father of the Minicomputer,' Named Recipient of 2014 IEEE > Computer Society Seymour Cray Computer Engineering Award So I was originally going to post that while I whole-heartedly agree that he deserved the award, I was a bit dubious about the 'Father of the Minicomputer' thing, because the only early minicomputer I knew of associated with him was the PDP-11 (which really made minicomputers a Really Big Deal, and is clearly significant); however, the grouping had attained takeoff speed before it appeared. It's a good question which minicomputer was really the first and/or really set the grouping going. Among the claimants would be the PDP-8 (the detailed designer of the original PDP-8 being Edson deCastro), which was surely the first extremely successful minicomputer, and the CDC 160 (designed by Seymour Cray). Another possibility would be the LINC, designed by Wes Clark (whose other big claim to fame was suggesting the ARPANET IMP), and Charles Molnar. Then there's the PDP-5, which was a success, but nowhere near as big a hit as the PDP-8, although it was the inspiration for the PDP-8. I wasn't sure if I class the PDP-5 as a minicomputer, though; it was a bit too big (physically) and expensive. But its architect was.... Gordon Bell! (See Glenn Rifkin, "Ultimate Entrepreneur", pg. 55.) Edson deCastro was apparently the detail designer of this one too. Bell was apparently also the architect of the PDP-8. So it sounds like the title is merited... (And Wikipedia really needs a PDP-5 page. Maybe I'll whip one up...) Noel

10 years, 3 months

Printset or schematic for H7874 PSU?

by robert.jarratt＠ntlworld.com

It seems I have yet another failed PSU (fans turn, CPU gives a diagnostic "F", but DC OK does not come on). This time from a VAX 4000-300 in a BA440 case. I have not been able to find a print set or a schematic. Does anyone have such information? Even just the pinout information for the external connectors so I can connect a test load to see what is coming out? How do DC OK circuits typically work? Regards Rob

10 years, 3 months

Inventory of remaining IBM S/360 CPU's

by marc.verdiell＠gmail.com

Henk, Great list, and scary short. Paul Pierce's magnificient 709 at the end of your list has been recently donated to the Computer History Museum in Mountain View, California. It is currently in storage there. I have recent pictures of it (front panel, row after row of tubes, giant spaghetti backplane) but with my daughter monkeying in front of it... If you are interested let me know. Marc > Message: 14 > Date: Sun, 21 Sep 2014 14:00:15 +0200 > From: "Henk Stegeman" <h.j.stegeman at hccnet.nl> > To: <cctalk at classiccmp.org> > Subject: Inventory of remaining IBM S/360 CPU's. > Message-ID: <LEEAKOBMDOCBLGHAMGACIENJDPAA.h.j.stegeman at hccnet.nl> > Content-Type: text/plain; charset="iso-8859-1" > > Hi, > > I have compiled a list with all known remaining IBM system/360 CPU's, their > owner, location and if avail a picture. > This webpage also links to other remaining IBM hardware lists. > They are all very short compared with the number of systems IBM ever > produced. > > http://www.ibmsystem3.nl/System360/ > > Any input to make this list more complete is welcome. > > Regards Henk

10 years, 3 months

Looking for Motorola XDOS for Exorset 110

by chrise＠pobox.com

I am hoping to pickup where Jack Rubin left off with a new to me Motorola Exorset 110 MC6809 development system. This is a periodic query to see if anyone has or may know the whereabouts of an XDOS boot floppy or any other XDOS software for this machine. These would be 5.25" soft-sectored floppies and XDOS 4.0 is the version discussed in the manuals although apparently there was an XDOS 3.0 also. I see MDOS out on bitsavers but those .IMDs appear to be for 8" media and I am not sure how I would convert that filesystem for 5.25" media but it's possible MDOS would boot on this machine also if proper media were available. Any leads? Chris -- Chris Elmquist

10 years, 3 months

Gordon Bell wins S. Cray Award

by michael.99.thompson＠gmail.com

> > From: Noel Chiappa <jnc at mercury.lcs.mit.edu> > Date: Sat, 20 Sep 2014 18:08:22 -0400 (EDT) > Subject: Re: Gordon Bell wins S. Cray Award > There are two editions (at least - I have a '71 and an '82), and they cover > very different machines. E.g. the '71 has Whirlwind, the 7094, STRETCH, > etc, > which the '82 doesn't. And of course the '82 has a whole bunch of later > machines which the '71 doesn't have - AMD29xx, various micros, Cray, VAX, > etc, > etc. > > Noel > I have a 1978 First Printing. It starts with the Lincoln TX-2 and ends with the 11/780 and the PDP-10. -- Michael Thompson

10 years, 3 months

manx and bitsavers *both* down?

by robert.jarratt＠ntlworld.com

It seems odd, but I am unable to access manx.classiccmp.org and bitsavers. I have tried from my regular domestic internet connection and also on my phone which is an entirely different provider. ????? Rob

10 years, 3 months

Video about CoCo Max

by tlindner＠macmess.org

CoCo Max is a program written for the Color Computer that is very much like MacPaint. I made a video comparing them. Please enjoy. http://youtu.be/4GxRr5tkSPk -- tim lindner

10 years, 3 months

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test-drb September 2014