test-drb August 2004

test-drb@ccmp.vtda.org

283 participants
661 discussions

by pete＠dunnington.u-net.com

On Aug 30 2004, 23:15, Tony Duell wrote: > > But something was nagging at me and I went and looked at the prints. > > > > The DEC DLV11-J, a 4 port unbuffered SLU had a clock I/O pin on it's Berg > > connector. > > It could output the 16x internal baud clock on that pin to drive a terminal, > > or accept a 16x external clock from a terminal, for each UART. > > That pin was commonly used with a DEC current loop converter module, the > number of which I forget (DLV11-K ???). That box plugged into the DLV11-J > at one side and had an 8 pin Mate-n-lock on the other to connect to a > standard DEC current loop cable. It also included a 110 baud (1760Hz) > generator, since the DLV11 couldn't do 110 baud as standard and the most > common reason for wanting a current loop interface was to connect to an > ASR33. Yes, it's a DLV11-K, and is also why the DLV11-J has 12V supplied on one of the connector pins. I've got one here. -- Pete Peter Turnbull Network Manager University of York

20 years, 2 months

Imagen print controller

by ddl-cctech＠danlan.com

Anybody want an Imagen IP/II print controller (less power supply)? These are the multibus systems with a floppy that drove 300 dpi Cannon engines. Dan Lanciani ddl(a)danlan.*com

20 years, 2 months

VAX 4000-300 - Null Modem Cable

by phirkel＠sympatico.ca

Howdy! I recently acquired a DEC MicroVAX 4000-300 and I want to connect it up to an old PC that I can use as a dumb terminal. Unfortunately, I lack a proper null modem cable, but I have a nice length of phone cable (it's the same connector pretty much, if you sand down the clip, right?) and a nice length of serial cable with connectors on each end. My question is, is it possible to jury rig these two pieces of cable, so that I can have my VAX up and running for at least a single user (Ethernet will come later! ;) ). If so, what lines should I cross (pin numbers would be nice :). Thanks. Phil.

20 years, 2 months

archiving Heath H8/H89 hard-sectored disks

by ddl-cctech＠danlan.com

Lyle Bickley <lbickley(a)bickleywest.com> wrote: |I'll second that. | |Lyle | |On Monday 30 August 2004 12:49, Vintage Computer Festival wrote: |> On Sun, 29 Aug 2004, Dan Lanciani wrote: |> > I've come up with a way to read Heath hard-sectored disks with a |> > 1797-style controller (with some modifications). I've now archived all |> > of my old disks with only one unrecoverable error in an unused sector |> > (not bad for media that is approaching 30 years in age). I do seem to |> > have run through *drives* at an alarming rate, though I hope that the |> > cleaning disks I have on order will restore some of them. Is anyone |> > interested in: |> > |> > -Technical details (the method should work for many non-standard FM |> > formats)? |> |> Hi Dan. |> |> By all means, please post some technical details. My plan was to read a track at a time in MFM mode to get both the clock and data bits which I could decode in software. The first problem was the index holes. I disconnected the index signal from the drive and routed the 1797's index input to a bit on an i/o port. (I was doing this on an H100 so I used the manual precomp line.) With index under software control I could create a fake hole, read as many bytes of data as I wanted, and the create another fake hole to terminate the command. The next problem was clock/data synchronization. Even in MFM mode the 1797 exposes only 8 bits (that is, every other bit) of its 16-bit data shift register to the cpu. Normally a special pattern with missing clock pulses synchronizes the register to the bit stream, but of course there is no such special pattern when reading FM data as MFM. I had initially hoped that there would be enough random variation such that a few attempts at reading any given track would result in at least one instance where the data was in the desired position. Unfortunately, the reading process turned out to be pretty much deterministic and if a particular run of bits was out of phase once it was likely to remain so. To solve the bit synchronization problem I intercepted the raw data input to the 1797 and delayed each pulse by 2 microseconds with half of a 74123, using the other half to produce a pulse of similar length to the original (not that the latter is critical). I then diode-or'ed the delayed bit stream with the original and fed the result to the 1797's raw data input. This guarantees that regardless of the clock/data bit phase relationship to the data shift register, all the bits are available to the CPU. Because the 1797 uses an external clock recovery circuit the timing of my delayed pulses does not interfere with accurate clock tracking. With the raw bits in memory I apply a simple algorithm to separate clock and data. I examine a bit. If it is a 0 it must be data and I shift it to the output buffer. If it is 1 I drop it and shift the next bit to the output buffer whether it is a 0 or a 1. With the data bits in memory I simply mimic the H17's normal operation by searching from sync bytes and accumulating bytes thereafter. Note that the bits in a byte for the H17 are reversed from most other disk formats. Dan Lanciani ddl(a)danlan.*com

20 years, 2 months

Phone Talk / Apple Talk

by ron.hudson＠sbcglobal.net

Anyone know how these are wired inside? could I make a dedicated 3 node "wire" out of just wire and connectors? perhaps an odd resistor or two?

20 years, 2 months

Identify an SMD component

by chd_1＠nktelco.net

I have two identical 72pin memory SIMMS out of an HP workstation. One is damaged by having a single 3pin SMD component physically destroyed, with only the leads remaining. The second is complete and functional. The damaged component's reference designation is CR5, so I am thinking it is a rectifier and not a transistor. The black plastic SOT-23 package is marked with 5A followed by a K rotated 90deg counter-clockwise. Any suggestions on how to identify the part? Is there a pointer somewhere to how SMD components are marked? -chuck

20 years, 2 months

IBM 5120/5120

by dwight.elvey＠amd.com

Hi Sellam Of course, I'd love to have the 5110 but I have no idea how much to offer for such a machine. Dwight >From: "Vintage Computer Festival" <vcf(a)siconic.com> > > >Let the frenzy commence! > >On Sat, 28 Aug 2004, Sharon Hamrick wrote: > >> Hello, >> >> Found your site searching on Yahoo for IBM 5110 or 5120. >> >> We have some equipment for sale maybe you might be interested in: >> >> 1 5120, IBM model 5110/3, 8" floppy drive, BASIC >> >> 1 5120 IBM model 5110/?, 8" floppy, BASIC/APL >> >> 1 5110 IBM model 5110A, internal tape drive, BASIC/APL >> >> 1 5114 IBM disk drive, 2 8" floppy drives >> >> 2 5103 printers >> >> We are an accounting firm who used these computers a very long time ago. We are moving this month, these have been in our office in storage and I would like to sell these if possible. >> >> If you are interested and would like any more detail, please contact us and I will try to provide any information needed. Some of this equipment worked when we quit using this but I do not know the condition since it has not been in use in many years. >> >> Thank you, >> Sharon Hamrick >> > >-- > >Sellam Ismail Vintage Computer Festival >------------------------------------------------------------------------------ >International Man of Intrigue and Danger http://www.vintage.org > >[ Old computing resources for business || Buy/Sell/Trade Vintage Computers ] >[ and academia at www.VintageTech.com || at http://marketplace.vintage.org ] > >

20 years, 2 months

MicroVAX3100 boot disk limited to 1GB - which ones?

by trash3＠splab.cas.neu.edu

I have a 3100-40 which has a 4Gb drive as a boot drive. The model 40 is SUPPOSED to be the same as the 30, but different case, expansion, etc. The model 30 memory certainly works in the 40. I seem to recall it is more an issue of age of firmware. I just asked a computer parts place I do business with about my model 30 and they said a 4Gb drive is the biggest that will work in it. Didn't try it though, just went to the model 40 (needed the space for more drives). Joe Heck

20 years, 2 months

NH/VT area goodies...

by jwest＠classiccmp.org

I'm posting on behalf of Marion.... > -------------------------------------------- > > CALLING NH/VT COLLECTORS: > > There's a nonprofit organization called WinCycle in Windsor, Vermont > that receives all of a local university's unwanted computer equipment, > which they then fix up and sell or donate to people and schools who > can't afford new machines. I've been volunteering there weekly for a > few months and it's really quite an operation. > > This has been a rough year -- burglaries, management upheavals, rising > costs -- and to top it off, they just found out that they have to > vacate their corner of the warehouse by the end of September, because > the warehouse owner found a tenant who wants the entire building, and > the rental agreement is only month-to-month. We've got to start moving > stuff out of there and into another building just down the street, > pronto, and the new building is less than half the space we have now. > > To get an idea of what we're dealing with, take a look at this: > http://www.wincycle.org/images/wc-panorama.jpg > > Anything that isn't considered saleable (i.e., new enough to surf the > web and run MS Office) will be scrapped if someone doesn't take it at > scrap cost (25 cents a pound?) and some will simply be given away with > the request that you make a donation of whatever you can. There are > tons and TONS of perfectly-intact but old machines that need a home! > I've taken home nearly fifty old Macs but I can't store any more. > There's PC hardware too, and printers, monitors, keyboards, mice, hard > drives, networking gear, software, manuals, peripherals, other internal > and external parts, enough SCSI cables to circle the Earth, etc. > > Please forward this to anyone within driving distance that you can > think might be interested. Parents, please ask your schools if they > need bulk quantities of stuff; we can most likely deliver locally, if > needed. Any other institutions or organizations (churches, charities, > etc.) you can think of that might be interested in loading up in bulk, > please tell them to contact us -- they can email Tim Cary > <caryconsulting(a)direcway.com> or me. > > More general info about WinCycle here: http://www.wincycle.org but the > price list is basically null and void at this point because of our > desperate situation. If you need further info than what's on the > website, please email mbates(a)whoopis.com -- do NOT reply to the list, I > won't get your message. > > Thanks! > > -- MB --- [This E-mail scanned for viruses by Declude Virus]

20 years, 2 months

Rescue DEC gear?

by lbickley＠bickleywest.com

A San Francisco Bay Area scrapper has the following DEC gear about to be scrapped. I've looked at it - and most of it is very clean. I'll reply with his name and email address if you let me know you are interested. I have no business interest in this transaction. Dec 5500 system --------------------- Ra90 drive missing H7142 power supply TK70 drive H7868-A REV E03 POWER SUPPLY M9404-PA KDA 50/M7165-00 KDA 50/M7164-00 TQK70/M7559-00 CXY08-M/M3119-YA DELQA-SA/M7516-PA KS220-AA/M7639-AP M7639-AF M7637 KN220/M7638 H7868-A DO1 DEC 9644 ------------- Ra90 drive missing H7142 POWER SUPPLY H7868-A M9060-YA KDA 50/M7165-00 KDA 50/M7164-00 CXY08-M/M3119-YA M9405-PA H7868-A Vax 3600 -------------- RA82 H7660C TK70 H7868-A Rev c KDA50/M7164-00 KDA50/M7165-00 EMULEX UC08 ASSY NO. UC0810201-04 REVR CXY08-M/M3119-YA REV D03 TQK70/M77559-00 DELQA-SA/M7516-PA MS650-AA/M7621-A MS650-AA/M7621-A MS650-AA/M7621-A MS650-AA/M7620-AA H7868-A REV C 4-RA92 2-RA90 DEC 5500 220-QH-D9 BA400, KN220 ------------------------------------------------- NO DRIVES KDA50/M7165-00 KDA50/M7164-00 MS220-BA/M7639 REV A2 KN220/M7637 F4 KN220/M7638 F4 H7874-00 VAX 4000/500 ------------------ KA670-AA REV C3 MS670 REV A ACTUAL BOARDS UNDER ABOVE MARKED PANELS: L4002 BA L4004 CT L4004 CP H7874-00 B03 Dec Storage Exp. Model SZ12 A-LA , BA42A, RZ55/RX23 Dec Storage Exp. Model SZ12N-B-XA, BA42A, RZ56 Dec Storage Exp. Model SZ12 C-CA, BA42A, RZ57/RZ57 Dec Storage Exp. Model SZ12 C-CA, BA42A, RZ57/RZ57 Dec Storage Exp. Model RZ5X-MT, BA42A, NO DRIVES Dec Storage Exp. Model SZ12 B-HA, RZ56/TZ30 Dec Storage Exp. Model SZ12 C-CA, BA42A, RZ57/RZ57 Dec Storage Exp. Model SZ12N-XA,BA42A, ? Dec Storage Exp. Model SZ12C-CA, BA42A, RZ57/RZ57 TK50Z-GA RZ55-FA VAXSTATION 3100 M76 MODEL VS43A-BD VAXSTATION 3100 M76 MODEL VS43A-CZ VAXSTATION 3100 M76 MODELVS43A-BD VAXSTATION 3100 M38 MODEL WS42A-DA VAXSTATION 3100 M38 MODEL WS42A-DA VAXSTATION 4000 60 MODEL VS46K-AB CPU KA46,ZZF HF00005B VAXSTATION 4000 60 MODEL VS46K-AD CPU KA46, ZZF 00005B, CD-ROM INSTALLED VAX 4000-200 RACKMOUNT 660QK-A9, BA400 CPU MOD KA660 ------------------------------------------------------------------------------- DRV1W-SA/M7651-PA KWV11-SA/M4002-PA P/N 30-18690-01(ML01338 BARCODE) KW11-SA/M4002-PA B1 WITH COAX CONNECTOR CXY08-M/M3119-YA REV D09 DELQA-SA/M7516-PA C03 (NO FUSE INTALLED MISSING FUSE CAP) CLEARPOINT CPCB-0053 REV D DCME-M30 CLEARPOINT CPCB-0053 REV D DCME-M30 PANEL SAYS MS650-BA/M7622-A A01 PANEL SAYS KA650/M7626-AA C03 UNDERNEATH ABOVE PANELS: M7626-AA C05 715AA H7874-00 B03 POWER SUPPLY TK70 RF22 70-25972-01 A01 RF73-EA A01, 70-28814-01 B03,(54-19119-01 A09) OTHER ITEMS RRD40 EXTERNAL CDROM MODEL SC008-AB A 70-18771 REV A MODEL SC008-AB B VSXXX AB DIGIPAD WITH PUCK DEC 3000 -500HY7883-YA REV C06 NO DRIVES MODEL PE50A-A9 CPU KN15 DRIVE R226E DEC 3000 -? NO LABLE LOOKS NJUST LIKE OTHER DEC 3000 1-DAT DRIVE CD-ROM RZ26-E TWO OTHER UNKNOWN 3 ? ? DRIVES Lyle -- Lyle Bickley Bickley Consulting West Inc. http://bickleywest.com "Black holes are where God is dividing by zero"

20 years, 2 months

← Newer
1
...
4
5
6
7
8
9
10
...
67
Older →

Jump to page:

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

test-drb August 2004