test-drb

test-drb@ccmp.vtda.org

101090 discussions

by Innfogra＠aol.com

IIRC the Floppy on an Altos 580 is DSQD. I had one that had the CMI hard drive replaced with a Seagate ST225. So I know they will take similar configured Hard Drives. I think they will take 10, 15 and 20 Meg HDs. Paxton Astoria, Oregon

24 years, 1 month

ZWL-183-92

by oeth_family＠prodigy.net

am looking for any info on the above model laptop. If you have any info, please send to P.B.man(a)juno.com . thanks

24 years, 1 month

DSQD Drives (Was: RE: Diags/Boot image for Altos 580)

by ajp166＠bellatlantic.net

The best way to write QD media is to use a TEACFD55GFV or FD55F as both work. Then the actual media is the BROWN or 360k stuff that has been bulk erased. The resulting disks will be reliable aswsuming the drive hasn't been munged or the formating incorrect. A PC FDC can drive these drives and will/can format them. You will need a utility program that does disk reading and formatting with CP/M formats. FYI: the TEAC drives are my favorite for any 80track format either single or double sided. I use them as substition for RX50s as well. Allison

24 years, 1 month

DSQD Drives (Was: RE: Diags/Boot image for Altos 580)

by rigdonj＠cfl.rr.com

At 12:14 PM 3/17/02 -0500, you wrote: >> IIRC the Floppy on an Altos 580 is DSQD. > >Am I correct that while different from standard >DSDD, they are *not* GCR drives? > >What other machines might carry these drives, The SB-180s used them. A lot of the later CPM and early MS-DOS (but not necessarily IBM compatible) machines used them. For example, they were popular additons to the Sanyo 55xs. I just found a pair of Teac 80 track drives inside of an old Multibus system (The same one that had the GAPP cards in it). can I >hook one up to a standard PC controller in a box >running DOS, and then duplicate the disks? Yes, MS-DOS can handle them. There's a DOS device driver that I can't think of the name of but it will let you specify the number of sides, tracks and sectors. It will handle them nicely. > >> I had one that had the CMI hard drive replaced with a Seagate ST225. So I >> know they will take similar configured Hard Drives. I think they will take >> 10, 15 and 20 Meg HDs. > >This is good to know, ST225s still pop up from time to time... 225s and 251s are handy to keep around since they'll replace a number of OLD hard drives. I've used 225s to replace the dries inside of some of the HP HP-IB disk drives. Joe > >-dq >

24 years, 1 month

IBM System/36 SSP on 5.25"

by ceby2＠csc.com

... back again with my periodic thread on System/36 IBM mini-computers... When I last left you... we were all bitching about SPAM. This week... we're bitching about SPAM?! The 5362 is in good health, and I've started to fool around with actually using it. As soon as I can find the LAN interface for it I'll integrate into the rest of my motteley managerie on line (the better to play with over VPN while travelling). To get to this point I hacked the security file, deliberately corrupted the VTOC and re-installed the SSP. I found scanning the disk sector by sector for appropriate files an... experience. Worked though. The 5360 was successfully moved from a printers workshop into it's temporary storage unit. My back is recovering. The U-Haul van started mysteriously burning oil. Co-incidence? You be the judge. Can't say as I've powered her up -- or even done a proper inventory of part numbers. I'm sure that's all something to look forward to, or at least it will be next time I can spare the day to drive down to Hartford. The 5363 arrived while I was away on client site. I get power and error messages on it right now. Still investigating.... Steve Robertson gets gold stars for his assist along the way. I've acquired his set of System/36 documentation. Slowly it makes it's way across my scanner. The prospect of buying a page feeder gets more appealing every page. Which leads me to the subject line of this e-mail: I have the SSP set on 8" disk, but that's not only a different format but a different version than what's supposed to be used on the late System/36 like a 5363. The 5363 continued to add version numbers to the SSP in a 5.25" version. The 8" stopped around V5. I'd like to bring the 5363 around, but I could use some additional tools to do it. Anyone out there holding onto a 5.25" SSP set? Warmest, SPAM-free regards, Colin Eby

24 years, 1 month

MV-II Diags & Customer Diags

by cdl＠proxima.ucsd.edu

> Date: Sun, 17 Mar 2002 00:28:11 -0600 (CST) > From: Doc Shipley <doc(a)mdrconsult.com> > To: Classic Computers <classiccmp(a)classiccmp.org> > Subject: MV-II Diags & Customer Diags > Sender: owner-classiccmp(a)classiccmp.org > Reply-To: classiccmp(a)classiccmp.org > > I've aquired a copy of each: > > MVII DIAG MAINT TK50 AQ-GM5AN-DN > MV DIAG CUST TK50 AQ-GL5AP-DN > > I'm going to try using dd to generate an image for duplication > tonight. If I can make a bootable duplicate from the image, and if > there are no licensing issues, I'll make the images available. Any > interest or comments? Speaking as someone who did this many years ago (duplicated MV DIAG TK50) it is not a simple dd job. You have to copy the entire structure of the tape, which is something like <tape header> [<file header> <file contents> <file trailer>] <tape trailer> Repeat section between [ ] as many times as there are files on the tape. Each header and trailer block is (I think) 80 bytes, and there are FileMarks at the end of each and every header, trailer, and contents. carl

24 years, 1 month

Switching PSU Theory of Operation / Repair Tips

by dhquebbeman＠theestopinalgroup.com

> Have I missed the start of this thread? I don't recall anything about > SMPSUs here in the last few days... No, believe it or not, SOMEONE BESIDE A SPAMMER HAS DISCOVERED THE LIST ARCHIVES! ;) -dq

24 years, 1 month

Dilog DQ-634?

by djenner＠earthlink.net

Anyone know what a Dilog DQ-634 does? I haven't found any information on the Net except for a couple of places that have them for sale. It obviously interfaces two MFM drives, due to the connectors on it. What DEC drives does it emulate? Is it a never version of the DQ-614, which emulates RL01/RL02s? Thanks, Dave -- David C. Jenner djenner(a)earthlink.net

24 years, 1 month

(fwd) Old Ohio Scientific 1970's Computers for sale

by donm＠cts.com

For those downunder or really hungry for OS hardware. Reply to the address below - not me. - don -- forwarded message -- Path: news20!news-feeds.jump.net!newspump.monmouth.com!newspeer.monmouth.com!news-out.visi.com!hermes.visi.com!news1.optus.net.au!optus!spool01.syd.optusnet.com.au!spool.optusnet.com.au!210.49.20.93.MISMATCH!not-for-mail User-Agent: Microsoft-Outlook-Express-Macintosh-Edition/5.02.2022 Date: Sun, 17 Mar 2002 19:38:35 +1100 Subject: Old Ohio Scientific 1970's Computers for sale From: Nobody <return-path(a)slyfox.org> Newsgroups: misc.forsale.computers.other.misc,misc.forsale.computers.other.systems Message-ID: <B8BAA13B.B1DE%return-path(a)slyfox.org> Mime-version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-transfer-encoding: 7bit Lines: 8 NNTP-Posting-Host: 198.142.41.195 X-Trace: 1016354317 6219 198.142.41.195 Xref: news20 misc.forsale.computers.other.misc:122159 misc.forsale.computers.other.systems:61836 see them at http://www.tigersnake.com/computers/index.html offers accepted, all items located in melbourne australia however will ship worldwide and will accept payment via paypal. -- end of forwarded message --

24 years, 1 month

Switching PSU Theory of Operation / Repair Tips

by reversebias＠talk21.com

Re Where does the 600v come from? The SMPSU in question is probably of the 'Flyback' or of the 'Forward Converter' type. In either case the converter O/P Tx primary winding is connected between the +300vdc rail and the collector of the switching transistor. The emitter of the switching transistor is connected by a small resistor to the 0v (-tve) rail. During the conducting period of the switching transistor (lets call it TR4 - it often is) the potential across TR4 is very low, a few volts. Hence virtually all of the 300vdc appears across the primary winding of the O/P converter Tx (lets call it Tx1). The collector of TR4 is therefore at -300vdc. When TR4 is driven into its 'off' period Lenz's Law causes the primary inductance of Tx1 to try to maintain the primary current. The resultant induced emf (due to collapse of primary flux) now produces a +tve potential at the Tr4 collector and a -tve potential at the +dc rail end of Tx1 primary. Hence the Tr4 collector is now 300vdc positive to the +300vdc rail. Therefore the collector of Tr4 is now 600v +tve to the 0v (-tve) rail ofv the PSU. Don't touch its Heatsink while the PSU is switched on. Also allow 4 or 5 mins for the voltages to bleed down after switching the PSU off before touching internal components. (It should give this warning on its nameplate) Hope this is clear and useful - it is 3.30am in the morning here in UK. Regards John Salmon Q&R Engineer

24 years, 1 month

Response to Re: List Management - RESPONSE

by steven_j_robertson＠hotmail.com

>Jay, don't take this too personally, but that answer SUCKS! When will you >be "damn well ready"? The list asked for a solution several weeks ago. I >think it's time to finally do something. The SPAM is not the problem. The problem is the rant that continue long after the SPAM has gone. In this case, there was a single email SPAM followed by forty F***ING replys bitching about all the SPAM coming from the list. The SPAM is not the problem... The real problem is the members that refuse to shut the hell up! Take your whining somewhere else! SteveRob _________________________________________________________________ Chat with friends online, try MSN Messenger: http://messenger.msn.com

24 years, 1 month

DSQD Drives (Was: RE: Diags/Boot image for Altos 580)

by ajp166＠bellatlantic.net

Actually one system did use it with hard sectoring, Northstar. All of the others were WDC or 765 based. Allison -----Original Message----- From: Richard Erlacher <edick(a)idcomm.com> To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org> Date: Sunday, March 17, 2002 2:28 PM Subject: Re: DSQD Drives (Was: RE: Diags/Boot image for Altos 580) >The one I had used a standard sort of FDC, so it's not likely it was hard >sectored, nor is it likely it used some off-beat, e.g. GCR, modulation scheme. > >Dick > >----- Original Message ----- >From: "ajp166" <ajp166(a)bellatlantic.net> >To: <classiccmp(a)classiccmp.org> >Sent: Sunday, March 17, 2002 11:51 AM >Subject: Re: DSQD Drives (Was: RE: Diags/Boot image for Altos 580) > > >> From: Douglas Quebbeman <dhquebbeman(a)theestopinalgroup.com> >> >> >> >> IIRC the Floppy on an Altos 580 is DSQD. >> > >> >Am I correct that while different from standard >> >DSDD, they are *not* GCR drives? >> >> >> DSQD generally means 80 track two sided drives such as >> TEAC FD55F or G and double density encoding. Typically >> they store around 800k. >> >> FYI that can mean hard or softsectored as that is controller >> not drive dependent. >> >> >What other machines might carry these drives, can I >> >hook one up to a standard PC controller in a box >> >running DOS, and then duplicate the disks? >> >> >> Kaypro with Advent turborom, AmproLB, Micromint SB180 >> to name a few. >> >> >This is good to know, ST225s still pop up from time to time... >> >> >> St225, ST251 and related drives are fairly common. >> >> Allison >> >> >

24 years, 1 month

DSQD Drives (Was: RE: Diags/Boot image for Altos 580)

by dhquebbeman＠theestopinalgroup.com

> I just took a look at the docs for the Series 5 Altos computers and > there is a repair ticket for a Mitsubishi M4853 Disk Drive. The floppy > disk summary docs indicate that drive is a 5.25, HH, 720K, 96 > TPI drive. Ok, not GCR, but I suppose similiar to drives used in the Sanyo MB550 (or whatever that silver incompatible was called). > The CP/M version with my Altos 580 is 2.2 Licensed from Digital Research > by Lambda Software (4 disks.) Each of the six disks I have are labeled > double sided, double density, soft sectored. Of the two other disks, one > is for the 580-20 and is labeled MPM/CPM for Altos 580-20, the other > Altos Diags for model 580-x. > > Hope this helps! Can you make copies for Doc? Regards, -doug q > > Douglas Quebbeman wrote: > > > > > IIRC the Floppy on an Altos 580 is DSQD. > > > > Am I correct that while different from standard > > DSDD, they are *not* GCR drives? > > > > What other machines might carry these drives, can I > > hook one up to a standard PC controller in a box > > running DOS, and then duplicate the disks? > > > > > I had one that had the CMI hard drive replaced with a > Seagate ST225. So I > > > know they will take similar configured Hard Drives. I > think they will take > > > 10, 15 and 20 Meg HDs. > > > > This is good to know, ST225s still pop up from time to time... > > > > -dq >

24 years, 1 month

DSQD Drives (Was: RE: Diags/Boot image for Altos 580)

by Innfogra＠aol.com

In a message dated 3/17/02 9:22:55 AM Pacific Standard Time, dhquebbeman(a)theestopinalgroup.com writes: > Am I correct that while different from standard > DSDD, they are *not* GCR drives? I don't think they are GCR but someone more knowledgeable than I will have to answer that. My understanding is that they are the same as a 360 drive with a head that is half the width so they can deal with 80 tracks instead of 40. > > What other machines might carry these drives, can I > hook one up to a standard PC controller in a box > running DOS, and then duplicate the disks? > > The answer to this is yes. For many years I kept an IBM PC (8088) clone with DSDD, DSQD drives and my EPROM programmer. IIRC I used the 3 1/2 inch 720K disk driver for the DSQD and it worked for my purposes of making disks for various systems. I used Media Master (sorry Fred) and PCDOS 3.3. Many systems of the MPM era used DSQDs, some single user computers like the Kaypro 4, too. The Intel 310s used DSQDs also. This is where most of mine came from. I still have a few 310s and DSQDs. Paxton Astoria, OR

24 years, 1 month

Z80 BigBoard ID Needed

by dhquebbeman＠theestopinalgroup.com

> > > If California Digital is still in business, I believe the > > > boxed CP/M they were (are?) selling is for the Xerox 820... > > > > That is certainly possible, Doug. However, the one that they were > > selling a while back (for $9.95, IIRC) was for the Xerox 1800 terminal > > less "laptop". Whether it is directly compatible with the 810, I do not > > know. > > This purchase was circa 1985... > > But that's the right price... I'll just have to look at > the disks when I get home again... <sigh> You're right, Xerox 1800... :( -dq

24 years, 1 month

ZX-TEAM meeting and Webcam

by acme_ent＠bellsouth.net

> From: Sellam Ismail <foo(a)siconic.com> > Hey! There are youngsters and virgins reading this list! No way! Glen 0/0

24 years, 1 month

Diags/Boot image for Altos 580

by drdidlittl＠yahoo.com

Bleh. MDR's mailserver is down, and I can't get in to fix it till Monday. Well, the Altos 580 ended up costing me $5 and "a future favor". Tyler couldn't find any of the floppy disks for it. It looks fine inside, except that the case fan was unplugged from the PSU. After finding the power header & plugging it in, I understand that. It does speak VT100, on RS232 port "JC" (Thanks, Andreas!) and boots to "Boot Monitor v7.03". Passes system tests, and attempts to boot from the hard drive. The activity light on the floppy drive comes on and stays on. I don't think the hard drive, a CMI CM-5619, is powering up at all. If it is it's incredibly quiet.... Anyway, I don't have any way to test the system. I did find an archive of MP/M II for it, but the zip file isn't in any image format. Does anyone have the install disks, and the Diagnostics/utilities disk, or disk images? And a way to create the disks on a Linux box? They are DD/DS floppies, right? Does this thing care what MFM disk it has? More junkyard fun.... Doc __________________________________________________ Do You Yahoo!? Yahoo! Sports - live college hoops coverage http://sports.yahoo.com/

24 years, 1 month

DSQD Drives (Was: RE: Diags/Boot image for Altos 580)

by ajp166＠bellatlantic.net

From: Douglas Quebbeman <dhquebbeman(a)theestopinalgroup.com> >> IIRC the Floppy on an Altos 580 is DSQD. > >Am I correct that while different from standard >DSDD, they are *not* GCR drives? DSQD generally means 80 track two sided drives such as TEAC FD55F or G and double density encoding. Typically they store around 800k. FYI that can mean hard or softsectored as that is controller not drive dependent. >What other machines might carry these drives, can I >hook one up to a standard PC controller in a box >running DOS, and then duplicate the disks? Kaypro with Advent turborom, AmproLB, Micromint SB180 to name a few. >This is good to know, ST225s still pop up from time to time... St225, ST251 and related drives are fairly common. Allison

24 years, 1 month

DSQD Drives (Was: RE: Diags/Boot image for Altos 580)

by dhquebbeman＠theestopinalgroup.com

> >This is good to know, ST225s still pop up from time to time... > > St225, ST251 and related drives are fairly common. Love the ST251. Any drive that still works after opening it up and blowing dust out of it with human breath is a wonder of engineering... -dq

24 years, 1 month

HP 2100/21MX emulator

by jwest＠classiccmp.org

My work on the emulator for the HP2100 and 21MX computer systems (and all applicable peripherals and interface cards) is reaching a point soon where I would like to solicit someone to help me with compilation testing on various unix platforms. I am doing the development and testing on FreeBSD, so of course I know it will work there. I am hoping that some list members can provide me with remote access to different unix platforms so I can make sure that it will compile correctly. I would like to make sure it will work on Sun, Linux, and HP-UX as well. I have access to quite a few HP-UX machines, but not Linux or Sun. Being a staunch FreeBSD bigot, I have no desire to install Linux myself. The emulator depends heavily on the implementation of fork(), execl(), and SYSV IPC mechanisms such as message queues. I have heard that there are some differences in the implementation of fork() on Linux for example. At the outset I wanted very badly to allow it to work on DOS/Windows platforms, but later in the design phase it became apparent for a variety of reasons that this simply isn't feasible, unless someone knows of a way to use SYSV IPC stuff there. If anyone can allow me remote access to these type of machines, please contact me offlist. Regards, Jay West

24 years, 1 month

VAX 6400 booting saga: SUCCESS!

by kees.stravers＠iae.nl

On 2002-03-17 classiccmp(a)classiccmp.org said to kees.stravers(a)iae.nl >> Get a VAXstation 2000, also called RD MFM disk >> formater. The VS2k has a MFM disk formater in ROM. >Will that work with any MFM drive geometry or only the >four RDxx types that mVAXes like? It will work with many drives. For the details see http://home.iae.nl/users/pb0aia/vax/vs2khw.html Kees. -- kees.stravers(a)iae.nl My site about the DEC VAX computer Geldrop, The Netherlands http://www.vaxarchive.org http://home.iae.nl/users/pb0aia/ is now back up, soon to be fully Member of Insomniacs Anonymous restored! Net-Tamer V 1.08.1 - Registered

24 years, 1 month

HP 715 and IBM 6091 monitor

by thomas＠tstrathmann.de

Hello, I have recently got an IBM 6091-19 monitor and figured I could use it with my HP 715/80 workstation but it doesn't work. Setting different video modes in the HP's boot monitor does not do very much either. The best I get is a partly readable but vertically diverted (sorry, I don't know how to describe this properly) picture. Looks like it cannot sync. Do you have any suggestions? Thomas PS: I also tried the switch on the monitor to no effect. -- Thomas S. Strathmann http://pdp7.org If God had intended Man to Smoke, He would have set him on Fire.

24 years, 1 month

Switching PSU Theory of Operation / Repair Tips

by dhquebbeman＠theestopinalgroup.com

Is this a follow-up to my thread about my dead Prime's PSU? if so, thanks, but that was a long time ago, I bought a replacement PSU rather than fix the old one. Damn thing still doesn't work but will maybe soon, we're debugging through it... -dq -----Original Message----- From: John Salmon [mailto:reversebias@talk21.com] Sent: Sunday, March 17, 2002 6:38 AM To: classiccmp(a)classiccmp.org Subject: Re: Switching PSU Theory of Operation / Repair Tips Re Where does the 600v come from? The SMPSU in question is probably of the 'Flyback' or of the 'Forward Converter' type. In either case the converter O/P Tx primary winding is connected between the +300vdc rail and the collector of the switching transistor. The emitter of the switching transistor is connected by a small resistor to the 0v (-tve) rail. During the conducting period of the switching transistor (lets call it TR4 - it often is) the potential across TR4 is very low, a few volts. Hence virtually all of the 300vdc appears across the primary winding of the O/P converter Tx (lets call it Tx1). The collector of TR4 is therefore at -300vdc. When TR4 is driven into its 'off' period Lenz's Law causes the primary inductance of Tx1 to try to maintain the primary current. The resultant induced emf (due to collapse of primary flux) now produces a +tve potential at the Tr4 collector and a -tve potential at the +dc rail end of Tx1 primary. Hence the Tr4 collector is now 300vdc positive to the +300vdc rail. Therefore the collector of Tr4 is now 600v +tve to the 0v (-tve) rail ofv the PSU. Don't touch its Heatsink while the PSU is switched on. Also allow 4 or 5 mins for the voltages to bleed down after switching the PSU off before touching internal components. (It should give this warning on its nameplate) Hope this is clear and useful - it is 3.30am in the morning here in UK. Regards John Salmon Q&R Engineer

24 years, 1 month

ZX-TEAM meeting and Webcam

by acme_ent＠bellsouth.net

> From: Stan Barr <stanb(a)dial.pipex.com> > Great stuff! It inspired me to dig my old thing out and plug it in. My wife asked me to do that just this evening ;>) > It powers up OK, but the display won't sync on my colour tv (a known > problem with zx81s...) so I guess I'll have to add a monitor output. A trivial task. > The old Forth system in mine (Skywave Forth) did multiple (tiled, text) > windows back in '83 when most home users had never seen a computer do > more than one thing at a time ;-) I used to use it as a data logger, > until it was replaced by an old XT... But it could still do the job, right? The ZX-Web-Cam and chat were a blast. It was up for a total of six hours, but they were the "after"-hours where the discussion was more on beer than computers. I did hear that a TCP/IP stack is near completion, and Kai Fischer brought a prototype ZX2000, but I don't have details on either one yet. Should be up on the ZX-TEAM homepage soon. Glen 0/0

24 years, 1 month

list problem fixed

by jwest＠classiccmp.org

The problem with the mail servers has been found and fixed. Turns out it wasn't due to the changes I had made. One of the open relay databases that we use for checking smtp servers that we will converse with is currently out of service it seems (mail-abuse.org). As a result, all the "dns"-style lookups our mail server would do to them to check for open relays would timeout. I removed the check for that service temporarily until it's disposition is known. Fear not - we have other services we check for open relay as well and they are still in effect. If there are any further problems with the list, please email me directly. And now, finally, perhaps sleeeeep Regards, Jay West

24 years, 1 month

Jump to page:

2026

2025

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