test-drb April 2002

test-drb@ccmp.vtda.org

280 participants
1162 discussions

by dbp＠phosphor-technology.com

Hi, The phosphor compositions are not secret, only the way they are made! The old monochrome green P39 is made of Zinc Silicate activated with Manganese and a trace of Arsenic to extend the persistence,(Zn2SiO4:Mn:As) which is the main difference between that and P1 (Zn2SiO4:Mn). The old monochrome orange "LA" phosphor is made of Cadmium Chlorophosphate activated with Manganese (Cd5(PO4)3.Cl:Mn). There are not always equivalents between the two codes. We stopped making LA phosphor for the far eastern market in the mid 90's because of environmental issues and the rise of colour monitors. I hope this helps David Pendrill Head of Research and Development. Phosphor Technology

22 years, 8 months

Assorted goodies & TK Question

by CAA007216＠mail.ono.es

If I understand it well, I could use one tabletop TK50-GA I have :-) That's right ? Oh, another more thing: Could I take one complete image of one backup tape to put it in a "virtual tape image" format ? I have one backup of Oracle for VMS (very old) and I'd like to recover it and mount under one simulator like SIMH or so. Greetings Sergio ----- Mensaje Original ----- Remitente: "Greg Elkin" <beermat(a)bouncy-castle.demon.co.uk> Fecha: Martes, Abril 16, 2002 11:32 am Asunto: Re: Assorted goodies & TK Question > > Has anyone ever gotten a "TK50-Z" in a 'TK SCSI' encosure to > work with > > any 'normal' scsi controller on a PC or something? > > > Yup, got a stripped one sat on a desk at the moment ; > TK50 (ver E4) from a different system > the SCSI-TK50 drive adaptor board from the (scrap) enclosure, set > to ID5 > PC AT PSU to drive the adapter board & TK50 drive > PC with Adaptec AHA1540CF, running DOS6.22 & Adaptecs DOS driver > (ASPI4DOS.SYS) loaded. > > Using the ST program (v1.1, by John Wilson) I can read & write > images from/to > TK50 catridges happily. > > I have the thing nekkid as I need to clean the TK50s head using a > Qtip with > IPA on every few tapes I play with as they get gunked up from > reading the old > tapes quite quickly. > > Now, if someone happens to have an image of the Mvax-II full > diagnostics that > could be usefull... > > > greg > >

22 years, 8 months

NEC V20 and Rainbow (was: NEC V-20 was: Native CP/M)

by mtapley＠swri.edu

Lawrence wrote: > On the Rainbow I saw mention of either an EPROM mod (it's documented >according to www.old-computers.com) or choosing the OS on start-up. I can't >remember the boot-up choice on my 'bow and it's buried right now. Boot-up choice is made by telling the system which disk to boot from. But you don't get to that choice unless you modify the boot PROM (I think not EPROM) to account for the V20's faster (fewer cycles) execution of a timing loop. The modification is documented, I think it's in Rainbow News and I can dig it out in a couple weeks if anyone is interested. For purposes of the original thread, modifying a Rainbow is needless, because it already includes a Z-80 (4 MHz) in addition to the 8088 (4.mumble MHz), and will run Dec CP/M-80/86. It probably makes a pretty good platform for anyone wishing to cross-develop from MS-DOS (up to 3.10b) to CP/M. For hot-rodding purposes, the V-20 mod is recommended by Rainbow News as a good way to get more speed out of the Rainbow. - Mark

22 years, 8 months

More 11/750 PSU Qs

by Lee.Davison＠merlincommunications.com

but it won't help with the current distribution problem. The PSU who's output after the diode drop is the highest voltage will end up sourcing all the current. Not what you really want. -tony Not quite, the forward volt drop of the diodes will even out the current between the individual units. Even shottky barrier diodes have a vf of >0.4v at the curents that would be involved. Lee. ---------------------------------------------------------------------------- ---- This email is intended only for the above named addressee(s). The information contained in this email may contain information which is confidential. The views expressed in this email are personal to the sender and do not in any way reflect the views of the company. If you have received this email and you are not a named addressee please delete it from your system and contact Merlin Communications International IT Department on +44 20 7344 5888. ________________________________________________________________________ This e-mail has been scanned for all viruses by Star Internet. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk ________________________________________________________________________

22 years, 8 months

Assorted goodies & TK Question

by pat＠cart-server.purdueriots.com

Has anyone ever gotten a "TK50-Z" in a 'TK SCSI' encosure to work with any 'normal' scsi controller on a PC or something? I picked one up for a few $$ today, and just realized the enclosure has a 220V power supply... Also, how do I get the disk out of an RRD40 without a computer attached? If anyone's interested in this stuff, reply off-list: DEC RRD40. I don't have anything but the drive and whatever is stuck in the drive with the CD in it. In a 110V external enclosure. DEC TK50-Z. In a 220V external enclosure (IEC power connection) DEC RZ55. In a 220V external enclosure (same one as TK50-Z) DEC DEBET. 110V/220V switchable ethernet 'bridge' I think. PowerMac 6100/66 PowerMac 7100/66 PowerMac 7100/66 'chipped' to 80MHz - i don't know the specs off the top of my head for these, will have to look. mostly 250M-500M hard drive and 8M-24M of RAM Quadra 660av Quadra 610 Mac IIci Mac SE Sun SparcStation 1 - 40M RAM, 240M HDD, CG3 video Sun Sparc IPC - 40M RAM (IIRC, will check), NO HDD, builtin video 2xNCD 19r XTerm, upgraded memory. One with AUI/10B2, one with AUI/10BT. 2xIBM 3191 terminal (going on EBay if I cant find a buyer this time around) 2xApple //e, one with 128K and DuoDisk, one with 64K and single Disk ][. -- Pat

22 years, 8 months

Looking for a particular piece of hardware...

by vance＠ikickass.org

Specifically a 2-channel 80+Mbps Mylex RAID controller. Peace... Sridhar

22 years, 8 months

Looking for OS/2 software.

by vance＠ikickass.org

Specifically, I'm looking for Digitalk Parts Workbench for OS/2. Peace... Sridhar

22 years, 9 months

Kinda OT?: Looking for rackmount screw sets....

by DAW＠yalepress3.unipress.yale.edu

Well, I just acquired a 5' x 3' x 2' IBM AS400 drive cabinet. F--n heavy! Now, to mount equipment in it, I need to find some more of those clip-on T-nut kinda things, which clip on around the hole in the rails, so you then use the supplies screws to mount your equipment. Some older DEC racks used the same thing. And, as you can guess, the guys at the local Home Depot just gave me funny looks. Anybody know where I can get a dozen or two of these screw mount sets? For a reasonable price? And what are they called? --- David A Woyciesjes --- C & IS Support Specialist --- Yale University Press --- mailto:david.woyciesjes@yale.edu --- (203) 432-0953 --- ICQ # - 905818 Mac OS X 10.1.2 - Darwin Kernel Version 5.2: Fri Dec 7 21:39:35 PST 2001 Running since 01/22/2002 without a crash

22 years, 9 months

simh V2.9

by dittman＠dittman.net

I just downloaded and built simh V2.9. I was able to boot the RA90 disk image I created for Charon-VAX. No timeout, full source, with Ethernet support coming. There's supposed to be a couple of bugs, but I haven't found them yet. -- Eric Dittman dittman(a)dittman.net Check out the DEC Enthusiasts Club at http://www.dittman.net/

22 years, 9 months

HP 13215A (Power supply) Info Needed

by ngallaher＠deepthought.org

I recently acquired an HP 13215A PS (power supply for a 7900A Disk Drive) from the local university (they junked an entire system and sold it for scrap piecewise). I can see that one of the terminal strips is labled with the output voltages (I assume) but other than that, I have no idea what this unit provides or requires. I would like to use this PS to power a FC array I have, but I don't know how to energize the PS, nor do I know the current ratings. Thanks, Nathan Gallaher

22 years, 9 months

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test-drb April 2002