test-drb December 2003

test-drb@ccmp.vtda.org

252 participants
453 discussions

by swtpc6800＠comcast.net

I found that it helps to search for WD179x or WD279x when looking for Western Digital FDC data sheets. A good set of WD179x (and WD1771) data sheets and appnotes can be found on David Keil TRS-80 page. http://discover-net.net/~dmkeil/trspdf.htm On the tool bar on the left side go down to the "TRS-80 Books & Technical Manuals" icon. A copy of the 279x data sheeets can be found on my site. http://www.swtpc.com/mholley/DC_5/TMS279X_DataSheet.pdf Michael Holley

20 years, 7 months

WDC1797 floppy controller data sheet?

by aek＠spies.com

page 173 of http://www.bitsavers.org/pdf/westernDigital/_dataBooks/wd1983catalog_02.pdf

20 years, 7 months

Disk hardware emulation, was Re: Grandfather system RTE6/VM?

by pete＠dunnington.u-net.com

On Dec 7, 14:11, Jules Richardson wrote: > Forgive me as I'm half asleep today (the top half I think, unfortunately > containing my brain...) > > A few points on this... > > a) I'm only personally interested in ST506 type drives as that's all I > have; others will be worrying about other technologies. Is there a case > where the data stream coming off the drive on a read (or going to the > drive on a write) might be something other "r/w a single sector"? I'm > just wondering about this sampling idea - it sounds plausible if the > only commands available are to read or write a single sector (plus the > usual seek etc.) but are other commands available where the data stream > to/from the drive might be different if say, multiple sectors can be > read/written in one command? At that point the sampling idea falls on > its ass if bolting together several emulated sectors doesn't give the > same data as it would for a real drive. > > b) In the case of ST506, I'm taking it that the controller always > provides the clock signal for reads and writes - otherwise, presumably, > there'd be no need for this oversampling of the raw bit stream idea. It > could be just sampled at the speed of the drive. I'm sure Tony will comment further, but his idea has the merit of not being restricted to single sectors; in fact it doesn't need to know *anything* about the data it's handling. It can start sampling when the interface is set to write and the relevant drive is selected, and stop when it isn't. Similarly it can replay the data stream when requested. There's nothing magical about a sector, it's just a stream of interspersed data and clock bits -- headers and all. However, it does need to be oversampled so you can get the timing right. An ST506 interface is very similar to a floppy interface, only 10 or 12 times faster. The way you read a sector from an ST506 interface is to "listen" to the data strema until you see the header for the sector you want, then start capturing the data. The way you write is to listen, and when you see the end of the preceeding sector, you wait (for the inter-sector gap time) then turn on the write signal and write a sync pattern, a header, more sync, the data+checksum, then turn the write signal off. Actually, IIRC you only rewrite the data, unless you're doing a low-level format. So Tony's idea could handle everything including an LLF, for any format and any encoding scheme you like. > c) Something that works "with most ST506 drives" is, IMHO, not good > enough. If a drive works with the ST506 controller with which it was > formatted, it should work with the emulator. Finding that it doesn't > work emulating XYZ's drive 6 months down the line because said drive is > within spec but our emulator doesn't quite like the drive spec doesn't > seem good enough. I don't know about other classic drive technologies > (all my old systems are ST506 or SCSI), so somebody can argue that case > seperately :-) Shouldn't be a problem, if you're sampling. It would be if you need to understand what the format etc is. > d) Tony's point about being able to understand all of the system duly > noted - only problem I see there there being the various combinations of > hardware options that would likely be useful to people. People would > find emulation of drives other than ST506 types useful I'm sure. Then on > the 'modern' side of the interface, there are various options - IDE, > SCSI, Ethernet, Token Ring and who knows what else. Ultimately at least, > it seems like using off the shelf components and software to drive the > modern side of things - and provide flexibility of operation - will > outweigh the desire to know intimately the entire system. You'll have a job to get a parallel port or any other standard interface to work fast enough to talk to the ST506 side. On the storage side, you could use anything you like -- make the software in the emulation system modular, and storage is just storage -- whether it's SCSI, ATA/IDE, network filestore, flash, whatever. -- Pete Peter Turnbull Network Manager University of York

20 years, 7 months

WDC1797 floppy controller data sheet?

by uban＠ubanproductions.com

Hello, I am in need of a WDC1797 (or FD1797) floppy controller data sheet. Does anyone have a scan that they could please send me or point me to? --tnx --tom

20 years, 7 months

Virus Distribution via this group

by danjr＠voyager.net

I routinely get virus alerts off of the cctalk and cctech lists. The ones I receive are usually warnings that a virus was detected and removed, and I have never actually gotten a virus from the list, so I usually ignore them. Dan > Does anybody else have trouble with routinely receiving a virus in place of > the proper collection of messages which constitute an issue from this > group? What I often receive looks like > > > ------------------ Virus Warning Message (IIIIIIIIIIIIII) > > Security warning Exceed_Decompression_Layer in file email-body > The file email-body is moved to /etc/iscan/virus/virNUv9Rs. > > Information from IIIIIIIII Mail-Server: Scanner detected a virus > (Exceed_Decompression_Layer) in an attachment (email-body) of this message. > The attachment was removed from the message. No further action is required > on your part. If you have questions, please contact > postmast@IIIIIIIIIIIIIIIIIIIIIIIIIIIIII > > --------------------------------------------------------- > > ------------------ Virus Warning Message (IIIIIIIIIIIIIIIIIIII) > > email-body is removed from here because it contains a virus. > > > > I have removed the name of our mail processor and substituted several > letters= "I". > > These viruses come numbered in the correct sequence, as if they were issued > by the normal server which distributes the proper message collections. By > the time the messages reach me any real content has been removed. Several > of these arrive per week. > > One question I must face is whether our firewall is discovering > non-existent viruses, and request a repair, but if the viruses are real, > then the server for this group needs cleaning. It is possible there is > somebody out there at a third point doing this, but how does this explain > having the messages in the correct sequence and delivered to me while > eliminating the correct message? (It never shows up, and how would this > "Third Party Server" be trapping the proper messages in order to substitute > a virus loaded message? If I were receiving one proper message and also > the contaminated version it would be easier to explain.) > > Any advice would be appreciated. > > Bob > > > > _____________________________________________________ > This message scanned for viruses by CoreComm >

20 years, 7 months

10342 manuals and softwasre

by drembedded＠yahoo.com

Simon, I came across your posting last year regarding the HP 10342 preprocessor. Did you find manuals and software for it? If so can you send me a zipped version of both? Thanks, Michael 408-421-9684 Hello Glen, I'm searching for the Software for the HP 10342. I have read your posting from Dec 26 08:12:15 2002 Could you please send me the .zip, too There was another posting about the manual for the 10342B. Did you or s.o. else publish it? I've manuals for all components of my LA and Preprocessor except for the 10342... If noone published it, can you tell me how to setup the S3 and J5 on the board? Thanks Simon Ulbrich __________________________________ Do you Yahoo!? New Yahoo! Photos - easier uploading and sharing. http://photos.yahoo.com/

20 years, 7 months

Space Invaders returning to arcades...

by bpope＠wordstock.com

Check this out: http://www.cnn.com/2003/TECH/fun.games/12/05/space.invaders.reut/index.html 10,000 Space Invaders units to be sold in the US for $2,772 apiece. But because of inflation, the cost per game is now going to be 50 cents! <rant> Are these people on crack?! What development time went into this? What costs are they recouping? Or do they just want to gouge the classic gamers? </rant> Cheers, Bryan Pope

20 years, 7 months

CRT5027

by aek＠spies.com

The data sheet can be found on page 243 of http://www.bitsavers.org/pdf/standardMicrosystems/_dataBooks/1985_StandardM…

20 years, 7 months

apple/corvus hard drive

by maya2blue＠juno.com

Hi Al, I have just joined the list and noticed the April 2003 exchange between you and Martin Scott Goldberg re Apples and Corvus hard drives. That subject is why I joined the list! I have been searching for documentation and admin/maintanence software for the Corvus hd for sometime. I am a middle school teacher and have an old IIe/Corvus Appletalk network that my kiddos use. It was orginally part of an Impac Learning System lab. I "snagged" it when we upgraded some years ago. I have ten computers, a hd chock full of MECC software and a variety of other software. I also have a 4 drawer file cabinet full of Apple software, and lots of extra apple talk cards/cables/etc. What I want to do is learn how to "add" or "delete" pgms from the HD in order to use more/different software. The specifics of the HD are: Corvus model 74MB7 Rev C SN 398-GN9230-P I have no hd software or instructions of any sort. I *do* know how to connect it all, boot it up and use it. :) Just wondering if anything you have in the way of docs or software might be of help to me? Or perhaps, you could point me in the right direction! Please let me know if you can be of help, and what sort of costs might be involved. Many tks your help.. Best regards. Harve Harve Thorn Greenmiddle School Greenland, AR 72701 hthorn(a)greenland.nwsc.k12.ar.us > From: Martin Scott Goldberg <wgungfu(a)csd.uwm.edu> > > Anyone have any extra old Corvus hard drives? I'm > looking for on for my Apple II display. Thanks! > > Marty I have an "H" series drive and an Apple II specific Omnidrive. Not 100% sure that they are still working, as they have been in storage for over 10 years. I also have controller cards and manuals/software for them. I'd love to adopt them out to a good home, and wouldn't want much for them. I just can't stand to throw classic computer stuff out, but would love to lighten the load around here... They are heavy and shipping would be expensive. It would probably cost more to ship the units than I'd want for them... Contact me off list if you're interested... Regards, Al Hartman ________________________________________________________________ The best thing to hit the internet in years - Juno SpeedBand! Surf the web up to FIVE TIMES FASTER! Only $14.95/ month - visit www.juno.com to sign up today!

20 years, 7 months

Need SunOS 4.03c (June 1989)

by vcf＠siconic.com

I'm in the market for the install media and documentation for SunOS 4.03c (June 1989). If you've got it or know where I can get it, please let me know. I'd prefer originals. I'm willing to pay reasonable price/costs. Thanks! -- 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, 7 months

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test-drb December 2003