test-drb June 2007

test-drb@ccmp.vtda.org

224 participants
486 discussions

by kahrs＠caip.rutgers.edu

I have 25 linear feet of old databooks. I've kept them partly out of sentimentality and partly because I have to fix stuff of that era now and then. The data sheet archives I've seen on the web are woefully incomplete. Does anyone know of anyone/anything that collects these?

17 years, 6 months

TESTFDC usage

by dm561＠torfree.net

--------Original Message: Date: Wed, 6 Jun 2007 08:34:37 -0500 From: "Dave Dunfield" <dave06a at dunfield.com> Subject: Re: TESTFDC usage <snip> To completely test the FDC, you need to check Single, Double and Double/128 at each of 250, 300 and 500 kbps rates. These are represented in a standard PC at: 250 = 5.25 low-density drive only, 3.5" low-density diskette 300 = 5.25 Low-density diskette in high-density drive 500 = 5.25" or 2.5" high-density diskette So to check all possible data rates without a 300/360 modded drive, you need to run two tests - either the 5.25" LD and HD drives, or a 5.25" HD and 3.5" drive. ---------------------- I also wanted to do some testing but, despite our off-list correspondence, I'm still confused: 5.25" drive, 3.5" diskette ??? 2.5" diskette ??? 3.5" drive - LD or HD? Exactly what tests should be run with what size/density disk in what size/ density/speed drive in order to get a complete picture? mike

17 years, 6 months

TESTFDC usage

by arcarlini＠iee.org

I've been checking through the stuff I have around here and I've decided that I have a few surplus PC mobos that I'll be getting rid of (via a certain auction site). Before I do I thought I'd try them out with TESTFDC and see what it says. I have three 5.25" drives (of currently unknown functionality) which I could use. One is a DEC RX33, one is a Tandon TM75-8 and the last one is a Sankyo (or that might just be the motor manufacturer :-)). I also have whatever is sitting in my main machine, but I'm not keen to drag that out just foir fun! I also have a few 1.44MB 3.5" drives, but they've not been used in quite some time, so heaven knows what state they are in. So what do I need to do to extract the maximum useful information about these motherboards (aside, that is, from checking that they are not already on the list :-))? And exactly what media will I need? Should I test both 3.5" and 5.25" (I've not tried the 300/360 mod yet; I may do in the future, but for now I'd just like to get some testing done)? Anything to watch out for? Any particular version of DOS recommended (I have 6.2? kicking around, would FreeDOS do if that is easier to find)? Thanks Antonio

17 years, 6 months

Anyone know anything about old TEC Terminals?

by classiccmp＠memory-alpha.org.uk

Hi, > Well, I don't know whether they're "plasma/LCD" or not, but I >find I get dramatically better picture quality out of flat-screens >as compared to CRTs. Well, the last two CRTs I bought are flat-screen so I'm not sure exactly what you're getting at. The biggest problems with LCD panels are colour registration, black level/contrast and response time. Even with top of the range panels, their comparatively slow response time leads to very noticable blurring when things move around on the screen - and I'm not talking about games here, I find this blurring totally unacceptable even when scrolling text windows, etc. And the colour/contrast/black level problems are a total show stopper when I'm dealing with video.... > I don't know whether this just means every CRT I've used has been crap, >or perhaps I *am* "profoundly blind", but even if so, in my experience >the comparison stands. I wouldn't have thought so, IME even the cheapest/crappest CRT is head and shoulders above even the most expensive LCD panel. It all depends what your expectations are.... TTFN - Pete.

17 years, 6 months

Databooks: keep or toss?

by compoobah＠valleyimplants.com

Tim wrote: > I've done it in classes taught and led and supervised by professionals > :-). > That doesn't make me a pro! > > Tim. > Diethyl Zinc process? Brave man... Magnesium Oxide/perflourocarbon could work for the amateur, though.

17 years, 6 months

Databooks: keep or toss?

by compoobah＠valleyimplants.com

> > The shiny, ultra-thin paper often found in databooks actually seems to > fare > better than coarser "book" type paper in my experience. I'm not sure > why - > maybe it's more resistant to absorbing moisture from the air or > something. > Moisture is a problem only if it's really high (mold predominantly, although sizing can soften and stick pages together). The big problem with many paperbacks is the so-called "high acid" paper with appreciable quantities of lignin in it - the lignin changes into acid and causes the paper to self-destruct. Think yellowing, crumbling paperbacks... I'm not sure what the paper of choice for databooks is, generally if a book uses sized bond paper it's not at highest risk, but for the most part wood paper made before the '80s will have some degree of risk (and more modern papers that are not acid-free archival grade). LOC (Library of Congress) has a fairly large group devoted to this problem, and a process fior neutralization that works pretty well (although if you do it wrong or make a mistake stuff bursts into flame). They point out that it is "not recommended for those who are not professionals".

17 years, 6 months

New pcb design for S-100 prototype board available

by classiccmp＠memory-alpha.org.uk

Hi, > Check out Advanced Circuits www.4pcb.com Just out of interest, are there any similar cheap PCB manufacturing companies in the UK? TTFN - Pete.

17 years, 6 months

govliq: (6) VAX 11/780 power supplies (H7112-A) NIB (Jacksonville, FL)

by legalize＠xmission.com

<http://cgi.govliquidation.com/auction/view?auctionId=1207011&convertTo=USD> -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://www.xmission.com/~legalize/book/download/index.html> Legalize Adulthood! <http://blogs.xmission.com/legalize/>

17 years, 6 months

govliq: 80MB CDC drive pack (French Camp, CA)

by legalize＠xmission.com

CONTROL DATA STORAGE MODULE DRIVES BJ7XX 80 MB <http://cgi.govliquidation.com/auction/view?auctionId=1191709&convertTo=USD> -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://www.xmission.com/~legalize/book/download/index.html> Legalize Adulthood! <http://blogs.xmission.com/legalize/>

17 years, 6 months

Mindset schematics

by chrism3667＠yahoo.com

A long shot I know, but does anyone have any service docs for these things? I tentatively have 6 at the moment! and of the lot only 1 works. Oi. Halp. ____________________________________________________________________________________ Sucker-punch spam with award-winning protection. Try the free Yahoo! Mail Beta. http://advision.webevents.yahoo.com/mailbeta/features_spam.html

17 years, 6 months

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test-drb June 2007