test-drb May 2006

test-drb@ccmp.vtda.org

195 participants
346 discussions

by ajp166＠bellatlantic.net

> >Subject: Re: wd1003 floppy ports > From: "Chuck Guzis" <cclist at sydex.com> > Date: Tue, 09 May 2006 23:04:18 -0700 > To: cctalk at classiccmp.org > >On 5/9/2006 at 8:06 PM dwight elvey wrote:>Hi > >>I want to know what the WD1003WA2 does with the 3F7 port. >>Most controllers use this port to control clock speeds. On the >>WD1003WA2, there is a jumper that is stated to be used to select >>360 RPM drives or 300 RPM drives. I'm trying to determine if >>the controller will do FM. One many older controllers that do support >>FM, the clock rate is set by sending 3 to port 3F7. Does 3F7 do >>anything on the WD1003WA2? If so, what. > >Well, my spec sheet for the WA2 says that it uses a 765 with a 16C92 >support device and supports data rates of 500, 300, 250 and 125 Kbps. If >this is anything like the standard AT controller, then setting port 3F7 to >3 will enable the 125 Kbps clock. Does it support FM? The spec sheet >doesn't say. As far as the jumper goes, IIRC, it's used to denote a >dual-speed (360 high-density, 300 low-denisty) 1.2MB drive. > >However, one of the later AT controllers, like the 1003WA4, the 1003RA2 or >the 1006 series uses the 37C65 controller which definitely supports FM >encoding. > >Cheers, >Chuck > The short answer is yes. The longer answer is you have to program the correct clock and tell the FDC to do FM not MFM (cammand bit). Also you have to specify (the command) HLT, LUT and STEP times as needed. Allison

18 years, 7 months

Wang Video Controller Diagnostics Utility Disk

by marvin＠rain.org

Among things I am finding is the following: PC 200/300 MEGA/MDA Video Controoler Diag. Utility Disk Rev. 2850 704-5133 (C) 1988, Wang Labs., Inc. The files on the disk are: . <DIR> 07-18-05 3:16p . .. <DIR> 07-18-05 3:16p .. DIAGUTIL EXE 35,688 05-04-88 12:37a DIAGUTIL.EXE DIAGUTIL MSG 3,197 05-04-88 12:03a DIAGUTIL.MSG EGAVIDEO EXE 13,262 05-06-88 3:51p EGAVIDEO.EXE EGAVIDEO WDM 14,977 05-06-88 3:41p EGAVIDEO.WDM EXECDIAG EXE 753 05-04-88 12:39a EXECDIAG.EXE HIRES COM 2,944 07-01-87 3:27p HIRES.COM IBMBIO COM 22,486 05-04-88 12:39a IBMBIO.COM IBMDOS COM 30,128 07-24-87 12:00a IBMDOS.COM WEGA EXE 25,728 01-22-87 11:42a WEGA.EXE 9 file(s) 149,163 bytes 2 dir(s) 21,699.92 MB free If anyone needs a copy of the disk contents, let me know and I'll email a copy of the contents in zip format (runs about 76K.)

18 years, 7 months

Linux UCSD filesystem

by jfoust＠threedee.com

>From the Yahoo UCSD Pascal list: From: "pmiller42au" <millerp at canb.auug.org.au> X-Yahoo-Profile: pmiller42au Sender: UCSDPascal at yahoogroups.com MIME-Version: 1.0 Mailing-List: list UCSDPascal at yahoogroups.com; contact UCSDPascal-owner at yahoogroups.com Delivered-To: mailing list UCSDPascal at yahoogroups.com List-Id: <UCSDPascal.yahoogroups.com> Precedence: bulk List-Unsubscribe: <mailto:UCSDPascal-unsubscribe at yahoogroups.com> Date: Thu, 11 May 2006 13:02:28 -0000 Subject: [UCSDPascal] Annouce: ucsd-psystem-fs-1.1 - Linux filesystem Reply-To: UCSDPascal at yahoogroups.com Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by pc.threedee.com id k4BDGwW10776 Status: I am pleasd to announce the first public release of ucsd-psystem-fs, a package for mounting UCSD p-System disk imags as Linux file systems. Please visit http://miller.emu.id.au/pmiller/ucsd-psystem-fs/ for more information and file downloads. (I have been trying to put it on SourceForge.net for the last week, but their new project registration review process seems to be constipated.) Regards Peter Miller

18 years, 7 months

IBM NetStation 300 PSU

by tarsi＠binhost.com

Greetings. Picked up an IBM Network Station 300 from a surplus place yesterday for $5. Unfortunately, it doesn't come with a power brick and there's no markings as to the power requirements. Does anyone have one of these and can quick glance at the brick and tell me what the voltage is and the polarity? Much appreciated. Nathan -- ------------------------------------- Nathan E. Pralle www.nathanpralle.com ------------------------------------- -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.392 / Virus Database: 268.5.5/334 - Release Date: 5/8/2006

18 years, 7 months

BA11-K low AC output levels

by henk.gooijen＠oce.com

Hi Julian, without looking at the diagram (I am at work now). True, the incoming *AC* voltage to the power bricks is some 22 V. I assume that P1 is the Molex connector that has (IIRC) 8 black wires which are 4 2-wire groups of the AC supply to the 4 bricks. In that case, measuring 10 to 15 Volt (AC) is rather low. The H744 (25A) or H7442 (32A) 5V bricks should work at 10-15 VAC input, but what will the AC input voltage do under load condition? Is the mains input voltage correct (what you get from the wall outlet). Careful! Does that match the spec of the PSU? - Henk. > -----Original Message----- > From: cctalk-bounces at classiccmp.org > [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Julian Wolfe > Sent: donderdag 11 mei 2006 8:41 > To: General Discussion: On-Topic and Off-Topic Posts > Subject: BA11-K low AC output levels > > Okay, so, I'm back to working on my /34. I think I made > significant progress tonight. > > What's going on is, I've narrowed it down to low AC levels > coming off the transformer. The printset and H7xx modules > specify an incoming AC of 20-30v (printset says specifically > 28v.) All lines coming off the transformer at P1 are reading > a value of 10-15v. > > So that leaves two possibilities. It's either the > transformer, or the AC input box. > > I'd like to test the levels coming out of the input box, but > I wouldn't know where to go, as my understanding of > electronics fades fast at this time of the night when I've > been up since 07:00. > > Okay, so maybe I traced it back that far, it got more > complicated, and it's late and I'm feeling lazy and hoping > someone will throw me a bone here :) in any case, advice is > always appreciated. > > toodles > Julian > > This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.

18 years, 7 months

BA11-K low AC output levels

by bob＠jfcl.com

>Julian Wolfe fireflyst at earthlink.net wrote: >All lines coming off the transformer at P1 are reading a value of 10-15v. These are about 1/2 the expected value, right? Are you running it on 110V when the transformer is wired for 220V input? Bob

18 years, 7 months

Looking for a DSSI disk & cassette for a VAX 4000

by jplist＠kiwigeek.com

Greetings all; Picked up a VAX 4000-300 just the other day, and as usual at surplus places, the disks were all stripped out. As well as the cassettes, naturally, the lazy sods. Anyways. Does anyone have a DSSI disk and VAX 4000 cassette they'd be willing to share? Thanks all; JP

18 years, 7 months

Gauging interest for an idea I have - feedback please! :)

by fireflyst＠earthlink.net

Hi everyone. In the ClassicCmp IRC this afternoon I brought up the idea that I have of starting a quarterly newsletter about vintage DEC systems (1960-1995 or so.) The thought behind this is that as opposed to reading mailing lists wehere you get snippets of information on specific problems, you would read full articles pertaining to both specific and general topics. Possible categories could include: - tools and test equipment reviews - general care and maintenance of a computer in a hobbyist environment - safety notes - specific software notes - getting started with any number of vintage software systems - emulation - interconnectivity between vintage systems, and also to the modern computing facility Now, my personal preference would be to do this on a quarterly schedule, and with old school production values (RUNOFF or some other vintage textsetting system.) Also, the magazine would be based on contributions, so it of course would only be the cost of media and postage. I would also plan to make the back issues available as downloads after 1 year (in PDF or some other universal form) with a printed copy available on request. So let me hear what you think! Julian

18 years, 7 months

Building a RS-232 fiber converter?

by ethan.dicks＠gmail.com

With the talk of 20mA converters, it reminds me to ask... is there a simple schematic for a basic RS-232 to fiber media converter? In the real world, I'd just pick a pair up at a Hamfest (or get a mate for the single-fiber AT&T converter I have at home)... here, though, with no planes due in for almost six months, it's make it or do without. I can harvest the ST-connector LEDs/phototransistors from a box of soon-to-be-discarded AUI-to-10BaseFL transceivers, and I do have enough MAX232-type chips that I can easily do it from a single supply... the question just becomes... what goes in the middle? The station here is wired with CAT5(e?) and fiber (mostly multimode, but some single mode)... it would be handy for me here to be able to have some remote serial thingies without depending on terminal servers/reverse telnet, etc.... just a small box with a DB25 or DE9 connected to another via fiber. 19200 bps would be great, but even 4800 bps would be better than nothing. Anyone have any ideas on how to construct such a beast? I can build pretty much anything from a schematic or even a napkin, but I'm not really a designer. If it's as simple as hooking an LED to the TTL output of a MAX232, and the phototransistor to the input of a MAX232, that'd be super, but I suspect that there might need to be a little more to it than that. Thanks for any input/direction/etc -ethan

18 years, 7 months

ASR33 Current Loop Converter

by sethm＠loomcom.com

Hello folks! It's good to be back on the list after a... well, I don't know how long, something like a two or three year hiatus. At any rate, I'd like to get back into things by asking whether anyone has good plans for building a 20ma current loop to RS-232 converter. I recently found a Teletype model 33 ASR at a flea market for $40, along with manuals, and I've nursed it back to health. With cleaning, degreasing, and a proper lubrication job, it seems to be working perfectly (well, 99% perfectly) in local mode. I'd like to get it talking to something that speaks RS-232. I've found a number of solutions for sale in the $50 range, but I was hoping to be a cheap bastard and build one myself. I've found a few schematics for hacks online, but no definitive plans for a reasonably robust home made solution. Yes, I suppose I could try to design my own. My horrible, embarrassing secret, though, is that while I'm a good programmer, I suck at circuit design. Never really got it. I can follow a schematic and solder my way to happy results, but don't ask me to design a light switch. I'll get it wrong. I've scoured the logs here, but I haven't found what I'm looking for. Anyone know where I should look? Otherwise, I guess I'll just have to give BlackBox my $50 and swallow my pride! -Seth

18 years, 7 months

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test-drb May 2006