test-drb April 2001

test-drb@ccmp.vtda.org

251 participants
669 discussions

fairly OT, but y'all may be able to help me :)

by ajp166＠bellatlantic.net

From: Geoff Reed <geoffr(a)zipcon.net> >I need to test a device that uses sensors that send back a signal using a >0-20MA current. anyone know of a source of a schematic to make something to >generate such in 1 ma increnemts? or have any tips??? Are you sure that those are not 4-20ma sensors? if so that is an industrial standard for remote analog sensors and there are devices that will translate the 4-20ma to a digital (even scaled if needed) signal either parallel or serial interfaced. Allison

23 years, 8 months

What's a Mag Card II?

by fernande＠internet1.net

Hello all, Today I stopped by Goodwill on my way home. I saw a rather odd piece of IBM equipment. It looks like a large black IBM typewriter connected to a large black box by a heavy cable. It is labeled "Mag Card II". What is it? I doubt they'll ever sell it, as they have it at $59!! Chad Fernandez Michigan, USA

23 years, 8 months

HP 98730 DaVinci Framebuffer ?

by xds_sigma7＠hotmail.com

A good amount of the manuals are still available from HP Parts surfer, can't remember address, if you can't find it let me know and I'll post it.. Similarly, if you can't order from it, I happen to work at a license HP reseller/repair place.. Will J _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com

23 years, 8 months

Need help on DEC cards & drives

by Innfogra＠aol.com

Hi; I need some help IDing some DEC cards; What is a PMAG-E & a PMAD A used on? How can I identify the quantity of VRAM on the PMAG-E? What is the small memory card on the same? All the slots are full. How big is a RF35-EA drive? RZ25, RZ26 & RZ28? How much memory on a M7622-AV, a M7622-AP and a DataRam 63015 (180010002)? These are in the VAX 4000/200. How do you open the case on the 4000 to see if it has any drives? I got the front panel open. Is an Emulex QD2110202 a Qbus ESDI or MFM drive controller? What is a Microtech MT CIQBA+? How much ram does a M7608 BS have What is an AH-132-06? 6 wide card, prob. Unibus. One is marked CPU Nissho. What is DEC MS02-AA memory used on and what size are they? Thanks for all help. If anyone is interested in purchasing any of this please contact me offline at whoagiii(a)aol.com. I will ship overseas. Paxton Portland, OR PS Also available is an MT external case with an Exabyte 8200 tape in it, a couple SZ 12X (an LA & an EA) Drive cases for 3100s, a Todd SCSI 1 CD tower with 4 Hitachi CDs (came in with the DEC) and a storage works drive tower with no sleds or drives.

23 years, 8 months

xerox memorywriter 620 FOR FREE OR AUCTION DEPENDING ON RESPONSE

by halarewich＠look.ca

Hi all: I have one Xerox Memorywriter typwriter / word processor to give away for the cost of shipping or if there is more than one person interested I will do a mini auction the memorywriter is in working order no manual but comes with traning manual for 620 series (original from xerox) Also have a ZDS (zenith data systems) Monochrome video monitor if anyone is interested the specs on the monitor are: model ZVM-1230-A green screen (P-31 phosphor) 110-volt, controls horizontil hold, width, verticl hight, contrast, brightness , on/off switch. CRT size and type 12" etched non glare dark tint. Video input monochrome ntsc cpmposite rca jack. Bandwith 15MHz rise time 23 nanoseconds. weight 13 lbs monitor also comes with owners manual If anyone is interested in any of the above items please let me know. for referance I live in Castlegar B.C., Canada V1N 1J5 thanx again Chris Halarewich -- # Netscape POP3 State File # This is a generated file! Do not edit.

23 years, 8 months

BCD accuracy (was: HP 85/Rocky Mountain BASIC replacement)

by ajp166＠bellatlantic.net

From: Jim Battle <frustum(a)pacbell.net> >Unless you are doing financial work where the fractional numbers tend to be >inherently decimal, BCD arithmetic, for a given number of bytes of storage, >is less accurate than binary. As a BCD byte can represent only 100 states >vs 256 for binary, you are going to lose more than one bit of accuracy per Sinppage.... Never confuse accuracy with resolution or range. Most BCD systems were less prone to truncation, rounding and other cumulative errors within their range. Binary for the number of bits gave more resolution but sometimes at the expense of accuracy. >So, OK, 0.1 (base 10) can't be exactly represented in a binary format, but >0.11111 (base 16) can't be represented exactly in an 8B BCD representation. If you meant .1 and got .11111 that would be a significant error! same for say meaning .1 and getting .09999. Allison

23 years, 8 months

Odd old Xerox equipment

by Innfogra＠aol.com

In a message dated 4/20/01 10:24:45 PM Pacific Daylight Time, Innfogra(a)aol.com writes: > > This sounds like a Xerox 6085 although I don't remember the case being black, > > more like a dark brown IIRC. If so it is the second generation Star machine, > > I can't remember its name right now (Daybreak? someone will correct if I am > wrong). > Boy, sorry for the bad form, answering my own mail. The 6085 is a Dove, not a Daybreak. Here is a great link by a listmember on identifying odd Xerox equipment. <A HREF="http://home.eznet.net/~heiny/mesa/ident.html">Xerox Workstation Spotter's Guide</A> Paxton Portland, OR

23 years, 9 months

Odd old Xerox equipment

by Innfogra＠aol.com

In a message dated 4/20/01 6:11:54 PM Pacific Daylight Time, optimus(a)canit.se writes: > was a black, rather fat tower with a very black front with relief stripes. On > top of it sat an equally black diskdrive, its front as black the computer. I > think it would fold down to reveal the actual slot. The back featured a > number > of very large blanking plates for graphics (I think a D15) and AUI. > What kind of system was it, when was it released, what OS did it run? Can I > marry it? This sounds like a Xerox 6085 although I don't remember the case being black, more like a dark brown IIRC. If so it is the second generation Star machine, I can't remember its name right now (Daybreak? someone will correct if I am wrong). Needs it's own monitor, keyboard and mouse. Look around for those. Highly collectable. Get it if you can. If you are close to Portland I would be interested. I miss getting rid of the ones I had. Runs a Xerox operating system called Viewpoint. Look for Version 2.0. I think I have it somewhere in storage. Good luck, Fun system. You can marry it. Paxton Portland, OR

23 years, 9 months

DEC Infoserver 100/150

by ajp166＠bellatlantic.net

From: Eric Dittman <dittman(a)dittman.net> >> These things are from the days when CD drives were expensive, basically. >> You could put any external scsi device on them (I think even tape drives) >> but we used them for CDROM distribution at the university where I dealt with >> them. > >Not just because CD drives were expensive, but also because >for certain VMS systems there just wasn't an easy way to >hook up a CD drive (depending on the bus and storage options). True but the first reason given is the one that was DEC designed. At the time the Infoserver was flown a Cdreader was 1200-1800$ for a 1x! and it was thought a group could effectively share a library of them. In the late 80s early ninties that was very true. Allison

23 years, 9 months

DEC (Minc 11?) RX01 disks and PUTR

by ajp166＠bellatlantic.net

From: Don Maslin <donm(a)cts.com> >> I bet the altos can't. The mixed density format is something only DEC >> did. > >Agreed, but I might be able to read sector content using DU. Nope, it's m2fm not mfm double density. Very different encoding and timing and none of the WD/NEC/Intel chips do it. Thats the part that makes it hard. Allison

23 years, 9 months

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test-drb April 2001