- test-drb@ccmp.vtda.org - classiccmp.org

by julesrichardsonuk＠yahoo.co.uk

> I have an old Quantum Lightning 540 AT hard disk ... > However, now, having tried to install the drive in a > more modern machine to archive the data to CDR, the > drive while recognized by the machine and the drive > itself spinning up and apparently working returns a > "hard disk read failure" error. Well it has drive to the spindle motor by the sounds of it. Whether the head assembly is intact is another matter. I think you can swap the boards on these things and expect them to still work - so using the combination of your chassis / motor / platter assembly and the logic board off a good drive might be enough - unless it is a fault in the head assembly. I have a Prodrive LPS 540AT in front of me right now which is likely the same thing as a Lightning. There seems to be just the one ribbon cable connecting the logic board to everything so a swap wouldn't be tricky and might cure things. Those drives used to be everywhere at one point so finding one shouldn't be too hard. Do double-check your drive cabling and BIOS settings (assuming it's a PC you're hooking up to) etc. - modern PC's seem to have a few billion settings for the disks and probably think you're using a new drive; they may make incorrect assumptions about data rates etc. > Can anybody point me in the direction of any good > information regarding the testing/diagnosis/repair of > head-disk-assembly problems? I know Western Digital used to release diagnostic utilities for their drives and held them on their website; there may be similar Quantum ones floating around. cheers Jules ===== Backward conditioning: putting saliva in a dog's mouth in an attempt to make a bell ring. ________________________________________________________________________ Want to chat instantly with your online friends? Get the FREE Yahoo! Messenger http://uk.messenger.yahoo.com/

22 years, 8 months

2
1
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Help with RT-11 'Split' Utility

by skidmore＠worldvenue.org

I am having problems with the unsupported 'split' utility on a PDP-11/23+ running RT-11 5.03 I am trying to split a 35000 block file into 3 files of similar sizes. I understand that you use octal values for block boundaries. Here is the command line that I have been using unsuccessfully: The octal value of 35000 is 104270. .split bak1.dsk,bak2.dsk,bak3.dsk=jul28.dsk/b:34757:69513 (where 69513 = 104270-34757) However, I receive the following error: ?SPLIT-E-Invalid command I need some help on how to specify the block boundaries. Thanks, Barry -- Barry Skidmore <skidmore(a)worldvenue.org>

22 years, 8 months

2
1
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NeXT Cable

by jkersey＠scoab.com

Hello, Sorry about that, I didn't realize I was posting to a list! :-) I actually sent off an order Wednesday morning to Black Hole Inc. for a monitor cable, keyboard, and mouse... My thanks to everyone who responded. Jim -- Jim Kersey Scoab Interactive http://www.scoab.com

22 years, 8 months

1
0
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Best way to Sell Old, Used Software and SW/dev Books w/little Collectible Value?

by Edward.Tillman＠valero.com

I don't think I'm exactly local to you, but if you wouldn't mind selling via mail, please contact me offlist at ETILLMAN(a)satx.rr.com or edward.tillman(a)valero.com. I have a 1992 DEC Slimline 486/33DX that'd probably just love those apps! (Especially the Star Trek screen saver!) On that system, I'm DOS 6.22, WIndows 3.1, Office 4.0. Cheers! Ed Tillman Store Automation Tech Support Specialist Valero Energy Corporation San Antonio, Texas, USA Office: (210)592-3110, Fax (210)592-2048 Email: edward.tillman(a)valero.com <mailto:edward.tillman@valero.com> -----Original Message----- From: Mike Ford [mailto:mikeford@socal.rr.com] Sent: Thursday, July 31, 2003 3:57 AM To: cctech(a)classiccmp.org Subject: Re: Best way to Sell Old, Used Software and SW/dev Books w/little Collectible Value? At 10:29 PM 7/27/03 -0400, Don Wallace wrote: >I have a mountain of dated (late 80s - early 90s vintage) and probably >non-collectible software packages and books that it seems to me would >be a waste to consign to a landfill. > >I mean stuff like: > >Clipper 5.2 >Corel Draw (Win 3.1) Version 4 >Quattro Pro for DOS >Ami Pro for Win 3.1 >Star Trek Screen Saver (ca. 1992) >Borland C++ 3.1 for Windows and DOS with Application Frameworks Nothing beats making a complete list of what you have, and giving your general location in hopes of a local sale.

22 years, 8 months

1
0
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IMSAI Restoration Suggestions?

by dwightk.elvey＠amd.com

>From: "Martin Scott Goldberg" <wgungfu(a)csd.uwm.edu> > >I'm hoping someone on the list can help. I rescued an IMSAI 8080, as well >as a large (and heavy) dual 8" drive chasis (fully enclosed). > >The IMSAI is stocked full of cards which I haven't figured out what they >are yet as they're in pretty tight and I'm afraid of breaking something >yanking them out. I'm assuming at least one of them is a terminal >interface card and another an interface for the drives. > >Here's the two problems with the unit though: > >1) It appears to be missing the main processor card. Everything else >looks mint, including the control panel and the ribbon from the pannel >to the control/processor card is intact as well. Hi It sounds like it is missing the processor card. Still, it may have one but it doesn't interface with the front panel. The only signals that run through the ribbon are data signals. All of the rest go through the bus. This means that if you don't need the ability to used that readouts of the panel, you can do things like reset and run without the ribbon. Check to see if there is some other processor card there. I see original 8080 cards on ebay often but there were many second source Z80 cards with the ribbon cable connector made as well. I see these very often on ebay. Just keep an eye out. > >2) The people (the university janitorial staff) that were throwing it out, >cut off the power cord. Hence there is a stub of a cord connected to the >power supply now running out the back. So, install a new cord. > > >I'm basicly looking for any help/suggestions in how to indentify the cards >and what I can do to fix the other two problems. Thanks! Take pictures. Put them on a web page. Note any text found on boards. Dwight > > > >Marty

22 years, 8 months

2
2
0 0

Simplest (practical) file system?

by mbg＠TheWorld.com

On Sun, 27 Jul 2003, Bob Shannon wrote: One such way: >Have some portion of the disk set aside for a fixed number of directory >entries (the "directory"). This is what RT-11 does, a fixed number of blocks (512 bytes each) are set aside as the directory. They are read/written in two-block units, called directory segments, and each segment can handle up to 72 directory entries. >Each directory entry has a certain number of characters for a filename >(12 is good), a file type byte, a status byte, and a pointer to the >portion of the disk where the file is stored. It might also contain the date and time the file was created, or accessed, or updated. RT only contains the creation date. There was some thought at one point of getting it to record creation time as well, but was never done by DEC. Also, RT is a single-user system with the capability of having multiple jobs running, so for tentative files (ones which haven't closed yet), there is information kept in the entry about the channel on which the file is open. >The file data is then stored on consecutive sectors, with the last one or >two words (depending on word size implemented) pointing to the next >sector of the file. Zero values means "end of file". Or, as RT did, you have the size of the file in the directory entry, so a file exists in the contiguous blocks 'start' to 'start+size-1'. RT also keeps track of the end of a segment so that the directory segments can be linked in any order as files are created and deleted. Of course, a more simple method would be to treat the entire directory as a contiguous set of entries and then you only need an indication of the end of the directory. The status info can also keep track of read-only vs. read-write files, protected files, files which should not be moved in a 'SQUEEZE' operation, etc. >There also needs to be a map somewhere specifying which >sectors are free/used. That can be a lot of overhead, and can take up a fair amount of disk space depending on how it is implemented, and with each directory entry having start and size, it isn't needed. With the contiguous file system on RT, one *can* extend a file, though it either takes intimate knowledge of the directory structure on the part of the program, or extra code to open a new copy of the file (larger), copy everything from the old version to the new, closing the old, updating the new one and closing the new. A program with intimate knowledge of the directory would have to find the entry for the file, check the next entry and if it is an empty space, it could increase the file size (up to the size of the empty) so long as it decreased the size of the empty by the same amount. Of course if the next entry is not empty, then you have to revert to the first method. A program on RT can ask to create a file: 1) a specific size, or 2) half the largest free space on the disk or the second largest free space (whichever is greater). RT attempted to fulfill requests for specific sizes using a best-fit algorithm which attempted to maximize disk usage by minimizing the size of free space between allocated files. Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | email: mbg at world.std.com | | Member of Technical Staff | megan at savaje.com | | SavaJe Technologies, Inc. | (s/ at /@/) | | 100 Apollo Drive | URL: http://world.std.com/~mbg/ | | Chelmsford, MA 01460 | "pdp-11 programmer - some assembler | | (978) 256 6521 (DEC '77-'98) | required." - mbg KB1FCA | +--------------------------------+-------------------------------------+

22 years, 8 months

11
24
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Tek 466

by john37p2＠earthlink.net

Have you any idea of how I can get schematics for Tek 466 scope? I see you have one and if I can't find schematics I might as well sell the thing. Regards, john Hannahs Corrales, NM

22 years, 8 months

2
1
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Alpha Micro 1000?

by larry＠laurelnet.com

Joe, The AM systems did not detect the presence of a terminal, so this would not inhibit booting. IIRC, the six is not a six, it is a lower case B (for "booting"). It is probably looking for directory structure and a monitor file on the disk. You can use any VCR on the video in/out ports, but unless you have one of the AM VideoTrax[1] VCRs you will have to manually press "Play", "Record", etc.. I think I have one of these laying around, but when I tried to use it as a plain ol' VCR a few years back it didn't work. I think I can still get in touch with someone who is a walking tech reference for all things AlphaMicro. If you like, I will try to contact him and see if he will talk to you. Let me know. Larry [1] The VideoTrax was a Zenith unit modified by AM to get the transport control signals from the computer. -----Original Message----- From: cctalk-admin(a)classiccmp.org [mailto:cctalk-admin@classiccmp.org]On Behalf Of Joe Sent: Wednesday, July 30, 2003 3:38 PM To: cctalk(a)classiccmp.org Subject: Alpha Micro 1000? Is anyone familar with this system? I can't find anything on AM's site and only one brief description on the net. I know it runs AMOS and has a 68000 CPU. This one has a 190 Mb hard drive and appears to have 4 Mb of RAM. It also has a PIICEON add-in card that adds 8 additional serial ports. It's also hanging up with a status code of 6 when I power it up. There' s no terminal attached so that MIGHT be the problem. I found a manula for a new AM system and it doesn't list a stat code of 6. Does anyone have a list of the codes for this system? Anybody know where I can find an Owner's or user's manual for this? Or what are the Video In, Video Out and Video I/O ports for? Joe

22 years, 8 months

1
0
0 0

apple corvus drive

by jakef＠mrF.Freek.NET

Hi, I saw you post on a list about a corvus harddriver for an apple, do you still have it, or could you pust me in contact with how has it now? I have the driver but need the software, and have been looking for it off and on for a year. thanks jake-F

22 years, 8 months

1
0
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KC Computer Swap Shop?

by k_m34＠yahoo.com

If you're still in town, be sure to go by <a href="http://www.surplusexchange.org">Surplus Exchange</a>! They get all kinds of cool stuff, and there's usually some really cool geek types in there browsing around. Jon.

22 years, 8 months

1
0
0 0

Nettrek

by 2dancers＠themacisp.net

I have NetTrek on my Mac se. Do you still want a copy? Stephen

22 years, 8 months

1
0
0 0

Fwd: More stuff

by jfoust＠foust.org

>Date: Mon, 28 Jul 2003 12:25:18 -0600 >From: Eldon Vore <jvore(a)acsol.net> >To: John Foust <jfoust(a)foust.org> >Subject: More stuff > >[...] just to ask if you have any interest in Datapoint computer peripherals? My friend Bob Saturday was cleaning out his storage room and found a Datapoint dual 8" floppy drive box, with two god awful heavy power supplies, and two Shugart drives plus associated electronics. The box is 24x21 1/2x6 1/2 inches. It weighs 70 lbs. There seems to be a lot of litigation going on involving Datapoint, formerly Computer terminals, Inc., I think. Any way, if you have an interest let me know or I guess the next stop for them in the county dump. Eldon Vore, jvore(a)acsol.net.

22 years, 8 months

1
0
0 0

PDP-11 Freeware CDs for RSX-11 and RT-11 (Originally Produced by Tim Shoppa)

by jhfinexgs2＠compsys.to

The last two times I posted this, another person contacted me either for help or to request the CDs. This will be the last time for about 4 months unless more people reply. In regard to the Freeware CDs for RSX-11 and RT-11 that Tim Shoppa originally produced: I am in the middle of finishing a third (very small) batch of CDs and could easily add a few additional copies. If you wish to be added to the list, please respond immediately. Otherwise, this is likely to be the last time for at least a few months. I will be making all copies of the CD images from: ftp://ftp.trailing-edge.com/pub/cd-images/ http://www.classiccmp.org/PDP-11/RT-11/ http://www.classiccmp.org/PDP-11/RSX-11/ Since not everyone has both a high speed internet connection and a CD burner, I thought it would be helpful to make them available. If you have both requirements and are using Windows 98 SE / Nero Burning, I can help with the details if you don't know how to burn a CD from an "Image File". I have even been able to produce a label for each CD that is close to the original label from Tim Shoppa, although since they were scanned (THANK YOU FOR THE HELP), they are not perfect. They are available at $ 6 / $ 10 / $ 14 for 1 / 2 / 3 CDs. In addition, I understand that Memorex Black CD-Rs have a longer shelf life and are available at Business Depot. If anyone wants those instead, add $ 1 for each CD that you are requesting. Thus those amounts are $ 7 / $ 12 / $ 17 Please contact me directly for my snail mail address. I picked up some Memorex Black CD-R blanks and started on the copies for those who have already requested that a Black CD-R be used. Please include your mailing address!!!!!!!!!!!!!!!!!!! In general, I will regard any funds you send as a gift so that if anyone really can't afford the CDs, please state why that is so. Outside of the US, probably about $ 2 should be sufficient for extra postage. All amounts are in US dollars. Please ask if you are not in the US. No point in converting twice. Sincerely yours, Jerome Fine -- If you attempted to send a reply and the original e-mail address has been discontinued due a high volume of junk e-mail, then the semi-permanent e-mail address can be obtained by replacing the four characters preceding the 'at' with the four digits of the current year.

22 years, 8 months

1
0
0 0

Alpha Micro 1000?

by Innfogra＠aol.com

In a message dated 7/30/03 12:40:21 PM Pacific Daylight Time, rigdonj(a)cfl.rr.com writes: > Anybody know where I can find an Owner's or user's manual for this? Or > what are the Video In, Video Out and Video I/O ports for? > Probably for a VCR backup tape unit. They used them quite a lot. Paxton Astoria

22 years, 8 months

3
3
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anybody need MANUALS for a Storage Tech Tape Subsystem?

by rigdonj＠cfl.rr.com

Went scrounging today and one of the things that I picked up is a FAT three ring binder full of Field Engineering manuals for the Storage Technology Corp model 1960 Series Tape Subsystem. Includes the FE Maintenance manual, Illustrated Parts Catalog, Part Number Compatiblity Listing (breaks down ALL of the engineerng changes and their PN effectivity), something called a Master Machine Level Listing, a User's Guide for 1900 Diagnostics, a pamplet about "Communicating with the Monitor", an OEM Maintenance Reference Guide and one more book that's missing it's title page. Looks like everything you could ever need for the STC 1960 Tape system. Everything in a three ring binder marked "STC Field Engineering". The docs are a good three inches thick. Anybody want it? Preference given to those that can archive/scan it and make it available to others. You pay the postage. Joe

22 years, 8 months

1
0
0 0

Epson QX-10 Hard disk, NOS

by Innfogra＠aol.com

Surprisingly I have a New Comrex ComFiler Hard disk subsystem on eBay and it doesn't even have one bid with seven hours to go. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2743819844&category=1247& rd=1 New old stock (NOS) in it's original carton, instructions, circuit card for the Epson QX-10 cables and an external 10 meg hard drive. Starting at $24.95 plus shipping which I think reasonable. Paxton Astoria, OR 97103

22 years, 8 months

2
2
0 0

Alpha Micro 1000?

by rigdonj＠cfl.rr.com

Is anyone familar with this system? I can't find anything on AM's site and only one brief description on the net. I know it runs AMOS and has a 68000 CPU. This one has a 190 Mb hard drive and appears to have 4 Mb of RAM. It also has a PIICEON add-in card that adds 8 additional serial ports. It's also hanging up with a status code of 6 when I power it up. There' s no terminal attached so that MIGHT be the problem. I found a manula for a new AM system and it doesn't list a stat code of 6. Does anyone have a list of the codes for this system? Anybody know where I can find an Owner's or user's manual for this? Or what are the Video In, Video Out and Video I/O ports for? Joe

22 years, 8 months

4
4
0 0

Quantum Lightning 540 AT Hard Disk

by roger161uk＠yahoo.co.uk

I have an old Quantum Lightning 540 AT hard disk containing some data I want to retrieve. The drive itself was removed from a computer some years ago (about 7 or 8 years), working as far as I remember. However, now, having tried to install the drive in a more modern machine to archive the data to CDR, the drive while recognized by the machine and the drive itself spinning up and apparently working returns a "hard disk read failure" error. Trawling the web, I found a short thread entitled "HD repair techniques" on cctalk. Like the original author of this thread, I too have a drive that contains data that is perhaps not worth the hundreds of pounds (GBP) that professional data recovery entails but wouldn't mind recovering the data all the same. Can anybody point me in the direction of any good information regarding the testing/diagnosis/repair of head-disk-assembly problems? Roger

22 years, 8 months

8
11
0 0

Tek 8002 system : some questions

by jos.mar＠bluewin.ch

I have a few questions on this old beast : Does it work with another terminal than the tek4024 ? What are default baudrates... Are manuals online or available ? Any info welcome...... Thanks, Jos

22 years, 8 months

6
6
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Places to acquire s100 items

by SPEDRAJA＠ono.com

Hi all. I'm thinking in purchase one IMSAI Series Two. I should like to locate some s100 items (boards, etc) to use with it. Somebody knows where ? Greetings Sergio

22 years, 8 months

3
2
0 0

Have any 387Sx-16's left?

by cb＠mythtech.net

woops, that was supposed to be offlist... sorry everyone. -chris <http://www.mythtech.net>

22 years, 8 months

1
0
0 0

Have any 387Sx-16's left?

by cb＠mythtech.net

>I am a grad student at UC Berkeley and I could use one of your >387sx-16's on a project I am working on. If you still have some and can >spare one, I am in the mechanical engineering department at: I don't have any at this exact moment, but I may come across more of them in the future. Do you have a deadline by which you need the chips, or is it just something you want to get eventually? (ie: should I hang on to your address and let you know if/when I get more, or will it be too late and you won't want or need them anymore). -chris <http://www.mythtech.net>

22 years, 8 months

1
0
0 0

Altair font - anyone identify?

by r.stek＠snet.net

I am attempting to make a reproduction name plate for an Altair 8800. I can try out various OCR-like fonts, but I was hoping that someone might have already identified the same or a similar font to the one used on the bottom of the front panel. If I can successfully do this, I'd certainly be willing to make them available to list members. Contest: who can come up with the cleverest place to put one of these OTHER than on the front of an Altair? Bob Stek Saver of Lost Sols

22 years, 8 months

1
0
0 0

Places to acquire s100 items

by dwightk.elvey＠amd.com

>From: "Sergio Pedraja Cabo" <SPEDRAJA(a)ono.com> > >Hi all. I'm thinking in purchase one IMSAI Series Two. >I should like to locate some s100 items (boards, etc) >to use with it. Somebody knows where ? > >Greetings > >Sergio > Ebay and swap meets. Dwight

22 years, 8 months

1
0
0 0

Future uncollectable computers...

by rdd＠rddavis.org

Hopefully this isn't too off-topic, but a thought just occured to me about computers that some may, or may not, want to collect in the future, which aren't classics yet. It seems that many of the newer computers have been designed with uncollectability, as well as a high degree of user-annoyance, in mind. Somehow, either some marketing idiots, or clueless enginers, got the idea to design computer equipment that's unstackable due to its rounded-off shape... the iMacs and some Compaq PeeCees (e.g. Presario 4814) come to mind. Is anyone going to be seriously interested in collecting computer equipment that can't be stacked, and does anyone actually find equipment that can't be stacked, or have anything stacked on top of it (not even a monitor or books, etc), to be other than an annoyance? -- Copyright (C) 2003 R. D. Davis The difference between humans & other animals: All Rights Reserved an unnatural belief that we're above Nature & rdd(a)rddavis.org 410-744-4900 her other creatures, using dogma to justify such http://www.rddavis.org beliefs and to justify much human cruelty.

22 years, 8 months

19
45
0 0

Epson HX-20 for sale

by classiccmp＠vintage-computer.com

I've been contacted by a gentleman who is interested in selling an HX-20. He can be reached via email at katerad(a)earthlink.net. I think he wants around $50 for the machine, but don't quote me on that. I am just passing along this information and have nothing to do with the offer, the item or the seller. (insert other typical disclaimers here) Please contact Tom directly (katerad(a)earthlink.net) Good luck! Erik Klein www.vintage-computer.com/vcforum The Vintage Computer Forum >> Have available for sale: >> >> 1----EPSON HX-20 >> w/ micro cassette drive >> printer >> expansion unit (H20 EU) >> case >> >> This is a very clean unit. Is this of interest to you? >> If so, can send picture. >> >> Thank you ! >> >> Tom Gaida

22 years, 8 months

1
0
0 0

Pet 2001 N16 Display Problem

by Degnan＠degnanco.net

I have a Pet 2001 N16. When powered up, it displays a screen full of garbled characters. I read a message board post on http://www. classiccmp.org/pipermail/cctalk/2003-January/014761.html that recommended that I replace the 2114s (from bgmicro.com) to swap out the video RAM. Any opinions/suggestions? Has anyone had a similar experience? ???? D???@??

22 years, 8 months

2
1
0 0

HP 1615 Logic Analyser

by coredump＠gifford.co.uk

I've just got an HP 1615 Logic Analyser on eBay for a few pounds, but it doesn't come with probes. Now, HP probes occasionally show up on eBay, too -- but which ones do I need for the 1615? Does anybody happen to know, please? -- John Honniball coredump(a)gifford.co.uk

22 years, 8 months

3
2
0 0

Looking for Sharp pens

by Robert_Feldman＠jdedwards.com

A message dated 2003-06-28 at http://fixyourownprinter.com/printer/new/10274.html offers them for sale. -----Original Message----- From: Joe [mailto:rigdonj@cfl.rr.com] Sent: Monday, July 28, 2003 9:43 AM To: cctalk(a)classiccmp.org Subject: Re: Looking for Sharp pens Those MAY be the same pens that were used in the Radio Shack GCP-115 preinter/plotter and a printer/plotter that Atari sold. The last ones that I bought came from a surplus company (Electronics Goldmine or somebody like that) but that was about 10 years ago. Joe At 06:58 PM 7/28/03 +0100, you wrote: >In message <002801c353e9$6e95c3e0$b15a3b18@homebrew> > "Tom Lake" <tlake(a)twcny.rr.com> wrote: > >> Do you have any Sharp EA-850B (black) or EA-850C (color) pens available for >> sale? If so how many do you have and how much would you like for some? >I'm also after some of these pens - they're basically tiny ballpoints that >were used in the Sharp pen plotters, e.g. the CE-515P. > >Thanks. >-- >Phil. | Acorn Risc PC600 Mk3, SA202, 64MB, 6GB, >philpem(a)dsl.pipex.com | video mods, 10BaseT (i3 EtherLAN600), >http://www.philpem.dsl.pipex.com/ | 8xCD, framegrabber, teletext >Diagonally parked in a parallel universe.

22 years, 8 months

2
1
0 0

Stickers on 8 in floppys

by dwightk.elvey＠amd.com

>From: "Cynde Moya" <CyndeM(a)vulcan.com> > >I notice on 8 in disks that the label stickers are affixed on the front, along the top, and only to about 1/4 of the way down. > >I was thinking of affixing bar code labels to the disks. I would like to put them on the back, where they would permanently identify the item, yet do not interfere with possible future display of the disk fronts. > >But I don't know if this would, somehow, get in the way of the proper functioning of the disks. > >I thank you in advance for any comments or advice. Hi As long as they don't cover any of the holes or are mounted poorly such that they peel off, there is no issue with where you mount it. Of course, you need to be careful when mounting such that you don't damage the media ( such as using a ball point pen ). Dwight

22 years, 8 months

1
0
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Stickers on 8 in floppys

by CyndeM＠vulcan.com

I notice on 8 in disks that the label stickers are affixed on the front, along the top, and only to about 1/4 of the way down. I was thinking of affixing bar code labels to the disks. I would like to put them on the back, where they would permanently identify the item, yet do not interfere with possible future display of the disk fronts. But I don't know if this would, somehow, get in the way of the proper functioning of the disks. I thank you in advance for any comments or advice. Cynde Moya, MLIS Archives Cataloguer Vulcan Inc. www.vulcan.com Office Tel. 206-223-4901 Mobile Tel. 206.369.3205 Fax. 206-223-4207

22 years, 8 months

1
0
0 0

Decdocs.org Site and contents

by SPEDRAJA＠ono.com

Hi. What happened finally with this website and its contents ? I offered to support it, but somebody in the USA had interest too and I leave to pass the matter. Greetings Sergio

22 years, 8 months

3
3
0 0

Found today..

by Lee.Davison＠merlincommunications.com

No box and no instructions but fully working and, apart >from a little dusty, in good condition a Commodore SR7949D scientific calculator. Price, nothing. I had already bought some things and had just pulled this out of a box and asked 'how much' only to be told take it. So I did. I like those prices. Lee. ________________________________________________________________________ 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

2
1
0 0

Simplest (practical) file system

by aek＠spies.com

The biggest problem that I see here is that Bob wants to be able to use this OS on systems that have as little as 16k words but still use LARGE modern drives. -- I have been thinking about this a LOT lately relating to using older CPUs with few or none of the original peripherals, and it may make sense, since you're building an IDE interface anyway, to build a file level interface onto the card, rather than talking to the drive as an unstructured block device. The idea I've been toying with is building an interface card like this with a local processor, disc, ethernet, etc. and using it in conjuction with a remote system that would provide the console / debugging UI / shared peripherals for a bunch of different processors that I have. This would also reduce the in-core footprint of the OS, since the file system (and networking in my case) is handled on the interface card.

22 years, 8 months

2
1
0 0

Simplest (practical) file system?

by dwightk.elvey＠amd.com

>From: Joe <rigdonj(a)cfl.rr.com> > >At 11:18 AM 7/28/03 -0700, Patrick wrote: >>> > I agree that it's simple, but not that it's efficient. For small micros, >>> > finding the first "0" bit in an arbitrarily long bit string takes a few >>> > cycles. >>> >>> You would just look for the first byte that is not a 255. >> >>That's absolutely true, you can do that, and from there it's fairly >>straightforward. But here's what I'm thinking. Let's say you have just a >>1.44MB floppy, with a 512 byte sector size. A convenient allocation size >>might be one sector, because you can easily fit the total number of >>allocation units (2880) into a 16-bit unsigned integer (that which is used >>in the file link blocks). That takes about 360 bytes to store on disk, >>which fits nicely into a single sector as well. So far, so good. >> >>But now let's say you go to an 80MB partition with 512 byte sectors. You >>then have approximately 163,840 allocation units (not discounting any space >>used for boot and other common structures). That's too many for a 16-bit >>word, so you decide to make your allocation units four sectors. That means >>you have 40,960 allocation units, each of which is 2K in size. Your >>free-space bitmap, then, would be 5,120 bytes, which takes 10 sectors or 3 >>allocation units to store depending on your implementation choices, but >>let's just go with the smaller 10-sector size. >> >>I'm thinking about two things: first, trying to keep the entire volume >>bitmap in memory chews up almost 5K of RAM, and that's probably not good for >>an 8-bit machine, at least, it's not sufficiently memory-efficient, IMO. >>Second, if you decide then that you'll only deal with one sector of it at a >>time to save RAM, you may have to read-then-write juggle those ten sectors a >>lot. If you do a linear search for a free block, it may be that you can rip >>through the 255-valued bytes quickly, but they have to be in RAM, so you may >>have to do several reads to find what you want, which saps time. > > > I wonder if it really would sap a lot of time. Modern IDE drives have >large cache buffers so I would think that system could very likely read the >data from the buffer. I'm thinking that as slow as these old systems are >and as fast as the modern drives are that it would be better to use a >simple and fast algorithim even if it means more drive accesses. > > Joe > As I recall, Bob is looking to put this onto some old HP hardware. Dwight

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09877-10002

by Doyle.Bullock＠robins.af.mil

We at Robins AF BASE are in need of a copy of a 09877-10002 Tape Binary Duplicator Tape. I just did a Google search for this part number and recieved the following. Do you still have these? Any help would be appreciated. Thanks, Doyle Bullock Eureka! Joe cctech(a)classiccmp.org <mailto:cctech%40classiccmp.org> Sun Feb 9 16:04:30 2003 * Previous message: CCS 2422 Floppy Disk Controller <009850.html> * Next message: Eureka! <009859.html> * Messages sorted by: [ date ] <date.html> [ thread ] <thread.html> [ subject ] <subject.html> [ author ] <author.html> Well I didn't find the Holy Grail but this is close! I went to a hamfest today and in a box of junk I found the operating program for the HP 9877 Mass Memory unit! That's the box that has up to four tape drives installed and was used to mass duplicate HP 9825 tapes at the HP factory. The 9877 is a rare bird and was only offered to the public for one year (1979 IIRC) but I've got two of the 9877s, Tony D has one and NASA KSC has one but NO ONE has been able to locate the operating program for it till now. The tape APPEARS to be in good condition but you know how HP tapes are :-( The full name of the tape is "Duplicator 9825A/9877" and it's part number is 09877-10002. Other INTERESTING finds (in the same box no less!) were a new DC-300A tape (as used on the IBM 5100 and Tektronix 4051), a Plot 50 tape and Plot 50 Backup tape and an Alignment tape. All three are for the Tektronix 4051 computer. Wahoo! A good ClassiComp day! Joe * Previous message: CCS 2422 Floppy Disk Controller <009850.html> * Next message: Eureka! <009859.html> * Messages sorted by: [ date ] <date.html> [ thread ] <thread.html> [ subject ] <subject.html> [ author ] <author.html>

22 years, 8 months

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ROM on Altair front panel board

by classiccmp＠vintage-computer.com

> I was just looking at the schematics for the display/control board > for the Altair 8800 and saw that there is a 1702 EPROM on the board. The > lowest 4-bits of the EPROM's address bus are connected to a 7493 binary > counter and the highest 4-bits are connected directly to the address bus. > > What's the purpose of the EPROM? Did the front panel have some > intelligence? I'm pretty sure that you're looking at an Altair 8800B front panel schematic. I believe those were software controlled front panels. The 8800 and 8800a had no EPROMs on the front panel - just TTL and the switches, LEDs, etc. Erik Klein www.vintage-computer.com/vcforum The Vintage Computer Forum

22 years, 8 months

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Looking for Sharp pens

by tlake＠twcny.rr.com

Do you have any Sharp EA-850B (black) or EA-850C (color) pens available for sale? If so how many do you have and how much would you like for some? TIA Tom Lake

22 years, 8 months

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ROM on Altair front panel board

by RCini＠congressfinancial.com

Bob: I don't know the exact Altair model the schematics relate to, but it's not the turnkey model. The ROM socket appears on the display/control board schematic, which has the front panel switches and LEDs. The Altair Turnkey would, I believe, have a different board in it called the Turnkey Module or something like that. If you want to see the schematic, go to my Altair32 Emulator page and look on the technical links page for the ZIP file containing scans of the schematics. I do not have an Altair, and I got these schematics from another source. The only designation on the page is "Figure 3-16; Display/Control Schematic (sheet 1 of 3)". The URL is http://highgate.comm.sfu.ca/~rcini/classiccmp/Altair32.htm I've had these schematics for a while, but I never looked at them that closely. Rich -----Original Message----- From: Kapteyn, Rob [mailto:kapteynr@cboe.com] Sent: Monday, July 28, 2003 2:37 PM To: cctalk(a)classiccmp.org Subject: RE: ROM on Altair front panel board Which version Altair ? The original Altair has no ROM anywhere. I think you are looking at the "turn-key" version. It has no switches for manual intervention, so it would have to have some intelligence, in the form of a boot-loader. I have never worked with a turn-key version, so I am not sure. -Rob -----Original Message----- From: Cini, Richard [mailto:RCini@congressfinancial.com] Sent: Monday, July 28, 2003 12:15 PM To: CCTech (E-mail) Subject: ROM on Altair front panel board Hello, all: I was just looking at the schematics for the display/control board for the Altair 8800 and saw that there is a 1702 EPROM on the board. The lowest 4-bits of the EPROM's address bus are connected to a 7493 binary counter and the highest 4-bits are connected directly to the address bus. What's the purpose of the EPROM? Did the front panel have some intelligence? Rich

22 years, 8 months

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at&t 458

by mmcfadden＠cmh.edu

22 years, 8 months

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ROM on Altair front panel board

by kapteynr＠cboe.com

Which version Altair ? The original Altair has no ROM anywhere. I think you are looking at the "turn-key" version. It has no switches for manual intervention, so it would have to have some intelligence, in the form of a boot-loader. I have never worked with a turn-key version, so I am not sure. -Rob -----Original Message----- From: Cini, Richard [mailto:RCini@congressfinancial.com] Sent: Monday, July 28, 2003 12:15 PM To: CCTech (E-mail) Subject: ROM on Altair front panel board Hello, all: I was just looking at the schematics for the display/control board for the Altair 8800 and saw that there is a 1702 EPROM on the board. The lowest 4-bits of the EPROM's address bus are connected to a 7493 binary counter and the highest 4-bits are connected directly to the address bus. What's the purpose of the EPROM? Did the front panel have some intelligence? Rich

22 years, 8 months

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KC Computer Swap Shop?

by mmcfadden＠cmh.edu

computer swap & shop 5612 Johnson Dr 66202 Phone 913-262-1991 FAX 913-262-2262 Mike

22 years, 8 months

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Simplest (practical) file system?

by dwightk.elvey＠amd.com

>From: spc(a)conman.org > >It was thus said that the Great Bob Shannon once stated: >> ---snip--- > > It also depends upon the size of the disk you are going to use---up to a >few meg in size the MS-DOS FAT system (12 or 16 bit variants) will probably >be the best bet---well documented with the ability for interoperability >between most systems. > > -spc (my two bits worth ... ) > Hi Bob If you absolutely must start with a FAT system I think that you should use a DOS like FAT. This makes things easy to move from machine to machine. The 12 bit FAT is a little clumsy so I'd suggest the 16 bit as the easier to deal with. Dwight

22 years, 8 months

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ROM on Altair front panel board

by RCini＠congressfinancial.com

Hello, all: I was just looking at the schematics for the display/control board for the Altair 8800 and saw that there is a 1702 EPROM on the board. The lowest 4-bits of the EPROM's address bus are connected to a 7493 binary counter and the highest 4-bits are connected directly to the address bus. What's the purpose of the EPROM? Did the front panel have some intelligence? Rich

22 years, 8 months

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More Acorn finds + Numonics graphics tablet

by julesrichardsonuk＠yahoo.co.uk

> To use with AutoCAD, set the tablet for binary data transmition at > 9600 baud, 8 bits, one stop bit. Switch settings are: ok, that's useful, thanks. I have a serial cable that came with the machine so I hooked it up to a DOS box and just used a terminal emulator to check I was getting data from it. It looks healthy as far as I can tell, although given the amount of raw data coming back the protocol looks quite complex. > Lastly, the AutoCAD notes say that the tablet can be configured to > emulate other brands by changing the PROM chips. Interesting. I'll have to take it apart now and see what (if anything) it says in the ROMs that are in there :-) I found some vague reference to Numonics tablets working under Linux with a Summagraphics driver if the ID string check is removed, but unfortunately it doesn't actually say *which* Numonics tablets that applies to. I'll have to give it a go sometime. I found a driver disk for Apple systems, but my Mac skills aren't sufficient to pull apart an Apple driver and engineer an equivalent one on a PC! (which is what I'd like to use this on) cheers Jules ===== Backward conditioning: putting saliva in a dog's mouth in an attempt to make a bell ring. ________________________________________________________________________ Want to chat instantly with your online friends? Get the FREE Yahoo! Messenger http://uk.messenger.yahoo.com/

22 years, 8 months

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Simplest (practical) file system?

by dwightk.elvey＠amd.com

>From: "Bob Shannon" <bshannon(a)tiac.net> > >ben franchuk wrote: > >> >> Use the whole disk ... block by block ... FIG FORTH worked this way. >> >Very tempting, as I'm adding a file system to a threaded interpreter >(not FORTH). > >But a basic block system is just too primative. Named files at a minimum. > Hi Bob As I've shown in my previous mail, you can use it as a starting place. I also have some code that I wrote to maintain files on a DOS disk. It is bassed on the original block system. Although, I didn't expand it to include sub-directories, this could be added with a small additional amount of code. The main thing is to get something working and keep things open enough that you can expand later. I wrote the DOS stuff so that I could more easily transfer things between my PC and my block system. Start simple and work towards a later complete system. Dwight

22 years, 8 months

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Simplest (practical) file system?

by dwightk.elvey＠amd.com

>From: "ben franchuk" <bfranchuk(a)jetnet.ab.ca> > >Bob Shannon wrote: >> What is the simplest usable disk file system to implement? >> >> More specifically, if your going to write a disk file system from >> scratch, what would be the easiest way to implement >> some basic file system functionality? >> >> How did some of the very early DOS systems allocate disk space in the >> days before FAT tables, etc? >> >> Just how simply can this be done? >> >> > >Use the whole disk ... block by block ... FIG FORTH worked this way. > Hi On one of my Forth setups, I wrote a word that would take the first number on a line of text in some block and then use that number as the next block to bring up. This way I'll edit a number of blocks as an index of the rest of the text/code on the disk. I could then pass this number on to words like LOAD, INDEX or EDIT. This made a simple directory setup with a method for accessing portions of the disk as different types of data. I'd place this word as a single key stroke in my editor so that I could use this word or just maintain the directory. I made it a rule to put both the starting block and the last block in the directory entry. This directory would look something like: 10 25 EDIT comments 26 29 ASSEMBLER 2A 2B PROGRAMMER Although, it kept the block numbers in ASCII, the time to convert to machine numbers is a small portion of the overall access time. Keeping the numbers as HEX values means that the conversion routines can be optimized for simpler processor and still be in a human readable format. I'd intended to add words that would maintain disk space but so far, I've just maintained things by hand. Still, one can see that with just a few extra words added, one can do a reasonable OS without the need for a true FAT. Adding words like a DELETE and a GARBAGE collector would make a reasonable disk OS. I did add a search words to my directory setup. This way I could find the EDITor fast if it was on some other block of my simple directory. The advantage of just starting with simple blocks is that one can expand it over time to even deal with sequential files ( what most consider random length streamy file ). At first, one can keep even the editor simple by having fixed length text lines, as a Forth block system does. A block is 1024 bytes. When displayed as text, it is a fixed chunk of 16 lines of 64 characters. Dwight

22 years, 8 months

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FF: Compaq SLT/286 and Acorn manuals (Cambridge, UK)

by julesrichardsonuk＠yahoo.co.uk

Hi, 1) I just found the Operations Guide and MSDOS 3 manual for a Compaq SLT/286 laptop up in the loft. The machine itself is No Longer With Us, so if anyone wants them they're welcome to them. The programs floppy is still there, and I believe I saw the diagnostics floppy floating around recently. 2) I have a few spare bits of Acorn documentation which could do with a home: Four copies of the Acornsoft View guide Two copies of the Econet level 2/3 fileserver user guide Acorn 3020 welcome guide Acorn 3020 welcome / user / apps guides (shrinkwrapped) Archimedes Smalltalk-80 manual Collect from just north of Cambridge (UK :) cheers Jules ===== Backward conditioning: putting saliva in a dog's mouth in an attempt to make a bell ring. ________________________________________________________________________ Want to chat instantly with your online friends? Get the FREE Yahoo! Messenger http://uk.messenger.yahoo.com/

22 years, 8 months

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RL02 Assistance...

by rogersda＠cox.net

Curt, Perhaps you've already received the assistance you need (I've been gone all weekend), but - depending on the version of VMS you have (I don't remember which version dropped "compatibility mode") - VMS doesn't much like to mount non-RMS file systems, except as "foreign", which you said you tried. Is there data on that disk you need? If not, why not use the command $ init DLA3: RLDATA If it fails that, then I'd suspect a driver mis-match. Dale > > From: cvendel(a)att.net > Date: 2003/07/26 Sat PM 09:21:33 EDT > To: cctech(a)classiccmp.org > Subject: RL02 Assistance... > > Hi, > > I've got an RL02 connected to my Vax 4000-200 through an RLV12 QBus > controller. > > The Drive is spinning up fine and the Ready light is Lit, the Fault light > goes off once power to the Vax is started and doing a SHO DEV at the Chevron > prompt and within OpenVMS both show: > > RLV12 Controller 0 (774400) > -DLA3 (RL02) > > Which looks great from my perspective, the drive ID plug is a 3, so DLA3 makes > total sense. In the SHO DEV within OpenVMS does display the drive as being > online. > > So my problem is with MOUNT, everytime I go to mount the drive the system > simply hangs and never seems to complete the mount, I end up having to CTRL- > BREAK to Halt the system back to Chevron and b up again from my DSSI DIA0: > > Anyone have any idea's what I'm doing wrong or what may be wrong??? > > I've tried with a /FOREIGN too since this platters are from an 11/730 and many > of the handwritten labels on the disk paks say RSTS on them, so I wasn't sure > if it was a format issue or something, I could really use some help/advice from > anyone with a lot of experience with the quirks of the RL's. > > Thanks much, > > PS: If anyone has an RK05 or RK07 DECPack for sale and possibly an RKV11D Qbus > controller I am in the market for one. > > Curt

22 years, 8 months

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8-inch disk drives

by luv2craftca＠jaydemail.com

Hi, I'm new to the list and am currently trying to find a solution to transfering data/software from 8-inch disks to a pc. We have a working minc-II with two floppy drives. The console is gone but I currently have an old 386 hooked up to act as a terminal. What would be the best way to transfer the info from the old disks to the 'newer' pc? One suggestion was to get an old 8-inch floppy drive and hook it directly to the pc, but it seems to me that would involve possible building a hardware interface and writing driver software. Any suggestions or pointers to web pages would be very welcome, I've already spent a few hours searching the web without finding a solution. Thanks! Jo -- _______________________________________________ Another FREE service from Jayde Online http://www.jayde.com Private, Web-based email accounts at http://www.jaydemail.com Powered by Outblaze

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