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

by cb＠mythtech.net

>best price (of whatever >is left): as late as possible. Yeah... when I was at TCF, there was one lady barking "Macs and PCs, two for $5". It was mostly < Pentium 100's or 68k macs, but she had a few early PPCs... if I had a cart I would have grabbed the PPCs at $2.50 each! She did have a PowerMac 5400 that my brother expressed interest in. But then she pointed out to him that it had no logic board or drives... it was just the screen, case, power supply. She dropped the price to $1.00... then told him he could just take it... I think if we waited another minute, she would have offered us money to take it with us (we left it behind... didn't want to carry the heavy MF even if it was free) -chris <http://www.mythtech.net>

22 years, 11 months

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Northstar File Transfer from PC

by dwightk.elvey＠amd.com

Hi Marvin Maybe this isn't exactly what you are looking for but I'm currently working on some software to transfer entire disk images through the serial port of a H89 to a PC. I have another friend checking out my first version, now. I hope to do a similar things for the N*'s as soon as I get one of these machines up and running ( on my list of things to do ). I suppose that once the image is on the PC, one can modify the image to include any new files, one wants and then transfer it back to the N*. It isn't a nice direct method but my main intent is to get some way to send disk images over the net and not specifically individual files. I haven't fiddled with the N* at all and don't know a lot about it. The H89 has a simple monitor that I use to hand enter a simple bootstrap program. With this, I bring in the rest of the code to run the disk drive. Does the N* have a ROM based monitor? I also have a similar setup for my Poly88 but that is setup for getting code into the Poly88 and tape from the PC. I used this to create code to do the various tape copying functions. I can read code from a cassette tape, transfer it through the serial to the PC and later feed it back through the serial to the Poly88 to write back onto tape. I use a similar bootstrapping code to get things started, through the Poly's monitor. Dwight >From: "Marvin Johnston" <marvin(a)rain.org> > >What is the procedure for transfering files to and from a PC using N* >DOS? For text from the N* to the PC, no problem, just print it out to >the terminal (a DOS machine) and capture it. But what about going the >other way, wanting to get information back to the N*? Any information >appreciated! > >------------------------------------------- >ebaY's Security Breach and Coverup >http://www.auctionguild.com/generic110.html

22 years, 11 months

2
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TRS-80 / System 80

by doug_jackson＠citadel.com.au

Alan, I recieved 2 System-80's, and had this fault in both cases. In the first case, there was a memory expansion that was very poorly wired, removing it, cleaning the sockets, and reinstalling the correct memory helped, and it now works a treat. In the second case, there was a disk controller installed in the bottom of the system. I discovered that if the FDC chip was removed, the system booted. I de-installed this modification, and the system works! (Later, I found out that the random characters was a symptom of the system waiting for a boot floppy [which I didn't have]) There is also a flexible cable between the video and the cpu board that could have faulty contacts. Giving this a clean should help. Hope that this helps. regards Doug Jackson Manager - Managed Services (ACT) Citadel Securix Pty Ltd Level 1, 10 Moore St Canberra ACT 2601 Ph: (612) 6290 9011 Fx: (612) 6262 6152 Mob: 0414 986 878 Web: www.citadel.com.au Melbourne - Sydney - Canberra - Brisbane - Hong Kong - Atlanta Any pricing or time figures contained within this email are indicative only, and have been provided for planning purposes only. Please request a quotation from your sales representative prior to undertaking any work. -----Original Message----- From: Alan Greenstreet [mailto:aeg@paradise.net.nz] Sent: Saturday, May 03, 2003 8:52 PM To: cctalk(a)classiccmp.org Subject: TRS-80 / System 80 Hi All I have just acquired a System 80 MkII (distributed in Australasia by Dick Smith Electronics). On power up I get the LED power light ok but a screen full of random characters, the reset switch does nothing. I've had it apart and there are no loose connections or chips on the two main boards and no sign of any burnt or expired components. Has anyone had similar problems and / or knows what the problem is? Thanks Alan CAUTION - The information in this message may be of a privileged or confidential nature intended only for the use of the addressee or someone authorised to receive the addressee's e-mail. If you are not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this e-mail is strictly prohibited. If you have received this email in error please notify postmaster(a)citadel.com.au. Any views expressed in this message are those of the individual sender and may not necessarily reflect the views of Citadel Securix. Feel free to visit the Citadel Securix website! Click below. http://www.citadel.com.au

22 years, 11 months

1
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Interesting aircraft memory and Bendix computer ad on eBay

by jpl15＠panix.com

Some eBay gleanings of possible interest: Computer memory unit CP548/ASA made by Sikorsky... http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2413856214&ca… Bendix G-20 advertising ephemera: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=21092&item=360628066… Big Old Iron fans should maybe check this one out. Cheerz John

22 years, 11 months

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Trenton Computer Festival

by alhartman＠yahoo.com

I also went to TCF on Saturday. I saw lots of Sparc Stations too. Didn't buy one. But, maybe next year. No TRS-80's that I saw (except for a Model 100 with a broken spacebar), One Amiga 500 that I couldn't carry home with all the stuff the seller wanted to sell with it. I did get a ROM 01 Apple ][gs with 2mb RAM, 3.5" FDD, 5.25" FDD, KB, Mouse, Joystick, Cables, PrintShop GS for $7.00 I bought an unknown Newer Upgrade card for $15 and got home to find it to be a G3 250/125. So that was a good deal. I also got two others for $10.00 each that turned out to be PowerComputing 604e 225/45 and a 200/50. So the G3 went in my 8500 (Since it didn't work in my PowerCenter 132) and the 225/45 went in the Power Center. Lots of other odds and ends there. But not too much of a selection. I saw one Vic-20, no Commodore 64's. Though there were some carts for them around. Hardly any video game consoles at all. No Apple II's, other than a few gs'es. No Next Stations. The Flea was a little smaller than last year, but there were definitely bargains to be found. I also got a JEIDA Memory card (16mb) for my ThinkPad 510cs for $5.00. That was a nice find. Also a Tandy JP-250 Printer (Canon BJ-10ex or similar relabled) with an extra cart and two dead batteries I tossed for $3.00. Printer works great if I use an IBM Proprinter Driver or a Canon BJ-130e driver. This is a great little printer that fits in my Laptop bag, and is good for taking on trips or meetings along with my ThinkPad 600e. I also saw a few HP Omnibooks, the old ones with the attached mouse that used a PCMCIA Hard Drive. I thought about buying one. But I decided I didn't want one that badly to take a chance on getting one I couldn't fix easily or cheaply. I didn't get a TRS-80 Model I or III or my holy grail... An LNW-80. But, I'll keep looking... But definitely the show is moving away from classic computers and becoming more and more PC/Mac. I think it's just because the price of the booths in the flea is just too high for the person looking to get rid of stuff in their garage. I think it was on the order of $100 with one ticket for admission. I think it used to be $20 - $35 years ago. And they'd have HUNDREDS of sellers in the flea. It looked like less than 100 Vendors this time around. I didn't count. It was worth going to, and I'll go back next year... Regards, Al Hartman The New Yahoo! Search - Faster. Easier. Bingo. http://search.yahoo.com

22 years, 11 months

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More DEC Stuff Coming

by mtapley＠swri.edu

All, Got this from the guy in Houston who supplied the VAX VLC machines. Contact him (best) or me if you are interested. >Date: Mon, 21 Apr 2003 23:33:16 -0500 (CDT) >From: sandmann(a)clio.rice.edu (Charles Sandmann) >Subject: More DEC Stuff Coming ... > >I was just notified today by the ChemE department head at Rice that it >is time to clean out one of the labs. It has mostly PDP stuff, some >VAX stuff, documentation, some media. KZ's going to make a rough list >so we can estimate the volume. The VAX stuff has been used in the last >year, but most of the PDP stuff has been off for 8 years or more, so >may need some TLC when being checked out the first time (if you don't >know about power supply caps, you probably shouldn't ask :-) I've made >some promises for some of this stuff already - but if there is something >you are dying for, it might be a good time to remind me. Between the >Rice stash and the AspenTech stash, there should be lots of machines >for everyone. > >If Intel IRMX (?) means anything to anyone, bug me. I think thats the >system name - and they are rare (but not DEC stuff ...) > >I think we will keep the extra RS6000/AIX IBM systems for spare parts >for clio - but you never know... > >I know there are some VT103s (VT100 systems with built in dual TU58s >and QBUS backplanes) - lots of QBUS cards, an 11/23+ rack mount system, >BA123 based MicroVAX II with ESDI and RQDX3/RD54 disks. I think the >11/23+ has an RQDX1 with RD51 drive (don't cringe!), dual RX02s >(I have a requirement to be able to read some media on these first!) > >There is a requirement to take lots of pictures for our scrapbook :-)

22 years, 11 months

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Amiga video

by teoz＠neo.rr.com

Anybody have a cheap 390682-01 amiga to vga adapter or know where I can get one? I am trying to use a NEC 3DS monitor on my Amiga A1200 to free up my 1084 monitor for my A500 and C128. I tried using a custom cable from IEC but it doesnt sync all the time (its just a wire thru while the silver amiga part has a buffer chip inside).

22 years, 11 months

2
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Another rubber capstan turns to mush

by chuck＠mail.schillernet.us

Hello All - bah, was just playing with my QIC drive, a WangTek 5150ES (Using dos tar!) and halfway thru the first listing tape stops. Turns out the rubber what drives the tape has gotten very soft. Anybody have a box full of cheap replacements? (pic here: http://mail.schillernet.us/wangtek/ ). I'd like to keep it working, but paying for depot service ( like http://www.eds-sales.com/EDS-QICPG.htm ) on a 150Mb drive is, uh, a questionable investment. --Chuck

22 years, 11 months

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HP 9000 300 data acquisition card - Infotek AD200

by peterbrown10＠hotmail.com

Hi Joe, I had a good look at the card last night - I'm 9(.9% certain that it is an AD card. The rear panel connector is marked MITSUMI CINCH - M57. It has an onbaord analog to digital converted type AD578ZLN - looks as though it is 12 bit 333 kHz sampling rate from the data sheet. There are two three way jumpers and a single 8-way DIP rocker switch assembly. I've no idea how to set it up.... Cheers Peter _________________________________________________________________ Worried what your kids see online? Protect them better with MSN 8 http://join.msn.com/?page=features/parental&pgmarket=en-gb&XAPID=186&DI=1059

22 years, 11 months

2
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Brainiac goes for over $300

by jrkeys＠concentric.net

Check it out at: http://cgi.ebay.com/ws/eBayISAPI.dll?viewitem&item=2725013336

22 years, 11 months

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ST Falcon Goes high on eBay

by jrkeys＠concentric.net

This ST Falcon goes for over $300. http://cgi.ebay.com/ws/eBayISAPI.dll?viewitem&item=2725518828

22 years, 11 months

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HP site

by jwest＠classiccmp.org

Had anyone run into this site before? I just came across it, and there's lots of VERY kewl HP1000 stuff listed there on a CD they put out. I cant seem to figure out from the site how you get the CD, but they say it's free (at least the components). Some of the entries in the library look very interesting! Looks like they have C compilers, 8080 assemblers, etc. http://www.interex.org/tech/csl/RTE/ for an overview... click on the "CSL" link Jay West

22 years, 11 months

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My new SparcStation

by cb＠mythtech.net

I just came from the Trenton Computer Fest... picked myself up a SparcStation 4. I probably over paid at $20 for the CPU with Solaris preloaded, a keyboard and cable, and a mouse and pad.... but since I already owned a monitor, it seemed like a fair price to have another toy to play with (really the fact that I have a 20 inch monitor for one already was the only reason I bought it. I see that monitor just about every day at work and I've been itching to get a computer to use with it, just to see what a SparcStation is like). So now my question is... anyone have any link recommendations of where to go to learn about these things? I'm about to do some googling, but I'm sure some of you already know good sites to visit. Other than that, I didn't buy anything of great interest. Just a few odds and ends of parts, like some extra mac drive sleds (25 cents each). I would have bought more stuff if I had brought a cart or something with me, but I just didn't feel like carrying everything. Next year my brother and I will be better prepared. We plan to bring a folding luggage cart each... THEN we will buy more toys. -chris <http://www.mythtech.net>

22 years, 11 months

2
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HP Amigo command set and HFS disk format

by fmc＠reanimators.org

"Peter Brown" <peterbrown10(a)hotmail.com> wrote: > It looks as though the general form of the commands is very similar to CS80 > format but the commands themselves are different - I wonder why HP did > this? Amigo was the project name for the computer sold as the HP 300 (not 9000 Series 300). I believe it was the first cut at designing a general protocol for communicating with storage (and maybe other) devices over HP-IB, and I think the name got stuck on the protocol as well. CS/80 came later, and I think it was informed somewhat by lessons learned from the HP 300 experience. And I think SS/80 was a sort of subset of CS/80 for lower-end storage devices. There was another protocol, CIPER, that was used for communicating with printers over HP-IB. At least that's what I remember from working on HP3000s in the 1980s. -Frank McConnell

22 years, 11 months

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HP64000

by david_comley＠yahoo.com

I brought home an HP64000 development system today. It has the emulation pods for the 68000 and 8080A processors, an HP-IB cable plus some other odds and ends in the backpack. A peak at the back indicated that it is crammed full of cards and 128K memory. Unfortunately what it doesn't have is either software or manuals, so this is a request to the group for help in that respect. I believe that there was a ton of software originally available for this unit to support various options and development tools, and I think what I am looking for is at least the operating system on floppy so that I can boot it up. Any background material on the 64000 would also be appreciated. I was impressed by the fact that it weighs almost as much as a model 33 Teletype yet it still has a handy reinforced carrying handle on the side for those portable sessions... Regards, Dave The New Yahoo! Search - Faster. Easier. Bingo. http://search.yahoo.com

22 years, 11 months

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AS/400 Operations Navigator

by marvin＠rain.org

I have the CD titled "AS/400 Operations Navigator" using Client Access for Windows 95/NT and the Manual "Client Access for Windows 95/NT - Setup V3R2M0". Since I have absolutely no use for it, $5.00 including US shipping to whoever wants it. ------------------------------------------- ebaY's Security Breach and Coverup http://www.auctionguild.com/generic110.html

22 years, 11 months

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HP Amigo command set and HFS disk format

by fmc＠reanimators.org

Joe <rigdonj(a)cfl.rr.com> wrote: > You asked me about this a few days ago but I've been busy and > forgot to reply. I have a document called "HP Flexible Disk Drive > Command Set" that I'm pretty sure contains a description of the > Amigo command set. It's an appendix to the HP 9114 disk drive > service manual. It's 36 pages long. I can send you a copy or I'll > send it to Al K. or anyone else that wants to scan it and post it on > the web somewhere. I think Joe sent me a copy of this a while back. Anyway, I fished it out of the pile in the living room and fed it to the scanner, with the result being at <http://www.reanimators.org/tmp/hpfddcs.pdf> (1183KB) for the time being. Joe, are you sure this was in the 9114 service manual? Not the 9121 or 9133? I'm just thinking it wouldn't make much sense being in an HP-IL drive manual. -Frank McConnell

22 years, 11 months

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Northstar File Transfer from PC

by marvin＠rain.org

What is the procedure for transfering files to and from a PC using N* DOS? For text from the N* to the PC, no problem, just print it out to the terminal (a DOS machine) and capture it. But what about going the other way, wanting to get information back to the N*? Any information appreciated! ------------------------------------------- ebaY's Security Breach and Coverup http://www.auctionguild.com/generic110.html

22 years, 11 months

1
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AMIGO command set and HFS disk format

by peterbrown10＠hotmail.com

Hi Joe, > It's definitely an Amigo drive then. I've found some other docs that confirm this. >My initial thought was the Amigo wouldn't suppport HFS but after >some >thought >I don't see any reason that it wouldn't. When I catalog the drive with a device that only supports CS80 (my HP 3562A Spectrum analyser) I see only one file (called SYSTEM_SA). When I attach the drive to an HP 9000 332 CPU, it finds the SYSTEM_SA file and then displays something like 'Secondary loader v 56.6' - I assume that this is the part that provides support for HFS. Once the secondary loader has done its stuff the 9000 332 will catalog the drive as usual and displays HFS as the filesystem. <snip> >bytes is not the same as the pair that would be returned by a CS80 >drive. Ignore my comments on this - my mistake. The numbers come from the 'Identify' CS80 command that is used at power on by the system controller to identify devices attached to the HPIB bus. The values 1 and 15 are consistent with the 9134x <snip> >That's odd. Is the drive bad? Most systems identify a 9134 as a 9133 >with >no floppy drive. I should have been more specific - the drive that fails is the 9134x - it fails because it is an amigo drive not a CS80. <snip> Thanks for the info Joe. I need to explain this one more fully! The HP 7907 is a 20.5MB (fixed) + 20.5MB (removable) HPIB controlled disk drive. The removable cartridge is a 9 inch by 9 inch by 1 inch box containing a single 8 inch platter. The drive wieghs about 60 lbs - it comes in the same width box as an HP 9000 300. It looks as though the removable portion of the drive is primarily for backup as separate panel controls are provided for Fixed->Removable and Removable-> fixed. I have one of these - I've just been using it for testing the CS80 / LIF reader software that I've been writing. The HP 7906 is a 5 MB (fixed) + (5 MB) (removable) (I think) MAC controlled HDD. I have one attached to my 5451C Fourier Analyser. It uses a 13037 interface card in the HP 1000 computer plus an external controller marked 13037A. I think that the controller can control up to 8 drives at once. The removable cartridge is around 17 inches in diameter. The drive weighs a lot - it takes two people to lift. My problem is that I have software on 7906 removable cartridges that I need to back-up. If I can find an HPIB controlled version of the 7906 then I may be able to support it with the HPIB reader software. Do you have any more information about the 12745C/D MAC to HPIB converter? - this sounds as though it will do the job! I've down-loaded the command set documentation that Frank has scanned etc. It looks as though it may be what I'm looking for re. amigo command set. Interestingly the docs themselves do not seem to use the word amigo anywhere?? As usual Joe, many thanks for taking the time to look this stuff up! - hopefully we should all end up with an application that will let us back-up and share our age-ing software. Do you have any info on how HFS works? Cheers Peter Brown _________________________________________________________________ It's fast, it's easy and it's free. Get MSN Messenger today! http://www.msn.co.uk/messenger

22 years, 11 months

1
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HP 9000 300 data acquisition card - Infotek AD200

by peterbrown10＠hotmail.com

Hi All, I've just acquired an HP 9000 series R332. In the back of it amongst the usual HPIB / GPIB cards there is a card marked Infotek Systems AD200 Converter, \ Assy 900-13992 rev E - I assume that this is some sort of data acquisition card. Does anyone have details of the card specification / the software required to drive it? Cheers Peter Brown _________________________________________________________________ It's fast, it's easy and it's free. Get MSN Messenger today! http://www.msn.co.uk/messenger

22 years, 11 months

2
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HP Amigo command set and HFS disk format

by peterbrown10＠hotmail.com

Hi Frank, Thanks for scanning and posting this document. I've had a brief read through and it may be what I need - I'll have a deeper look this evening. It looks as though the general form of the commands is very similar to CS80 format but the commands themselves are different - I wonder why HP did this? Cheers Peter Brown _________________________________________________________________ Worried what your kids see online? Protect them better with MSN 8 http://join.msn.com/?page=features/parental&pgmarket=en-gb&XAPID=186&DI=1059

22 years, 11 months

1
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Fw: Viewfax 258

by bob.c＠dial.pipex.com

----- Original Message ----- From: Bob Clark To: mel(a)pullen.com ; danny(a)spesh.com ; Glyn Philips ; Lindsay Reid Sent: Saturday, May 03, 2003 3:35 PM Subject: Viewfax 258 My god what a week this has been for finding old friends. First Bill Olivier, then Sue wakes me up this morning (or afternoon possibly) - there's a Lindsay Reid on the phone, would I like to talk to him? What, talk to Lindsay for the first time in 15 years, yawn oh ok then if I must. This three days after we had complained that Lindsay had gone completely unfindable on the web, and was obviously dead. What we didn't do of course was try www.viewfax.com. Lindsay was ringing to ask if anyone remembers or better still knows a man >from the olden pirate radio days called Richard Fox-Davies, aka Dick. This name rings strong bells with me, but I can't remember why. Anyone? (My extensive researches this afternoon reveal that his books for kids are still popular in Western Australia, assuming this is the same guy: http://henrietta.liswa.wa.gov.au:90/search/aFox-Davies/afox+davies/1,3,25,B… xact&FF=afox+davies+dick&1,2 ) This may be a justified cause for an NTK (http://www.ntk.net/) appeal Dan, because... ... the good news is that Lindsay still has Viewfax 258 backed up on 5.25" floppy disks. There's quite a few disks, and we'd have to sort through them somewhat to find the Gnomey bits. But Lindsay is happy to loan his disks to Glyn the man with the archaic hardware, all he needs is his address. Then he'd like his disks back. I figure we could probably blow the lot onto the first quarter inch of a CD for him. So our dream may come true and we'll have both the Gnome on Prestel and the Gnome at Home splurged all over our shiny new web site. Meanwhile, please admire my wonderfully wonky first-stab character set one more time... Bob PS Late-breaking news, Peter Turnbull rediscovered too: http://www.classiccmp.org/pipermail/cctalk/2003-January/014196.html [demime 1.01a removed an attachment of type application/octet-stream which had a name of viewfax7.jpg]

22 years, 11 months

1
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Heathkit EC-1

by dwightk.elvey＠amd.com

>From: Joe <rigdonj(a)cfl.rr.com> > >>>From: "Ethan Dicks" <erd_6502(a)yahoo.com> >>> >>>--- "Dwight K. Elvey" <dwightk.elvey(a)amd.com> wrote: >>>> Hi >>>> An interesting side note. The power steering of your >>>> auto is an example of an analog fluid amplifier. >>>> Dwight >>> >>>I don't think _my_ auto (1968 Beetle) is an example of that. :-) > > Do you mean that it doesn't have hydraulic brakes? :-) I expect that the vacuum advance on the distributor would also qualify. > > Joe > Hi Hydraulic brakes don't amplify unless they use a booster. It is true that most drum brakes amplify when stopping while moving forward. Many cars of this time frame may not have a vacuum advance. I know my Fiat Spider doesn't( I think the VW's did though ). Still, most any auto is just full of analog computing elements. Dwight

22 years, 11 months

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ClassicCmp Auction Site?

by jss＠subatomix.com

Forgive me if this has already been discussed today; I don't have time at the moment to scan the entire thread. With this latest round of discussion about eBay, the thought crossed my mind that maybe we need our own WWW auction site. It would only contain classic computers and related items, and it could be designed in such a way that would please a large number of list members and colleagues, including those who avoid eBay. Could I hear some opinions on this, please? My WWW-related programming skills -- not my traditional forte -- have seriously improved since the last time we discussed ideas for the CC site. In fact, I've been doing it for money at my workplace for the last few weeks. For several months now, I've been increasingly interested in implementing some of the ideas I've had for ClassicCmp improvements, and if people think it is a good idea, an auction subsite would make for a very interesting project. Don't worry; there are no weblogs up my sleeve. :-) -- Jeffrey Sharp

22 years, 11 months

12
14
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FS/FT Items

by pat＠purdueriots.com

On Wed, 30 Apr 2003 philip(a)awale.qc.ca wrote: > > On 29-Apr-2003 Patrick Finnegan wrote: > > I'm looking for either QBUS parts, or $5 + shipping for each of the > > following.. Trying to clean out my room before I have to move in a few > > months. > > > > - SparcStation 20, 32MB ram, 1x50MHz proc, floppy, 2GB HDD. > > I have 2 of these to get rid of. > > I'd be interested in one of these. Or have they be claimed already. > Could you give me an estimate on shipping to Québec (J0B 2C0) ? All of the sparcstation 20's have been taken. Pat -- Purdue University ITAP/RCS Information Technology at Purdue Research Computing and Storage http://www-rcd.cc.purdue.edu

22 years, 11 months

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Inquiry about Classic Computers Collectors List

by ReCarDeaux＠aol.com

To Whom It May Concern:

22 years, 11 months

4
3
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dnd

by carlin＠nauticom.net

Hello: I have been searching for the source code to DND for quite a long time now, and I ran across this post you made at some time in the past. Would you happen to have worked out the details in order to distribute the source code? I used to play this game in college many years ago, and it would mean quite a lot to me to get it up and running again. Thanks for any help that you can offer, Ken Carlin >From what I've read, banned inside of DEC is the best description :^) It >uses creatures and spells straight from D&D. Yep, I know exactly which one you speak of... I have the sources for the pascal version of the game, along with the data files, preserved for almost 20 years. I have ported the game to C using curses (actually, it was mostly a brute-force translation from the pascal) and have it running at least as well as the original pascal version (which was incomplete) at home on my Alpha PWS running Linux. I've been in contact with one of the people who was responsible for writing the pascal version, and am trying to get ahold of all the others so that I can figure out how to write up a 'copyright' page with proper attributions. >Basically all I know is what's written up at the following webpage: >http://www.io.com/~adastra/rancourt/dnd/ >It was written by Daniel Lawrence, started on the PDP-10, was ported to >RSTS/E part way through, and after that ported to VAX/VMS. I played it on RSTS/E when I was working at Parker St (DEC) in Maynard back in 1977. Actually, the pascal version was also built on RSTS using, I believe, the OMSI compiler, and ran on RT-11. Dan has apparently given permission for any and all versions of the game to exist with his blessing, but since the source I have had a copyright which is problematic (since it doesn't mention him), I have to try to do the right thing. >I grabbed the source off of the web page above, and it almost works. In >fact it might work, IF, I could figure out exactly how to build it. BTW, >the "TOPS-20" executable, looks to be a VMS V1.0 executable. If/when I can resolve the issues of attribution, I'd love to make it available... should I even bother with sourceforge? :-) Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | email: gentry at zk3.dec.com (work) | | Unix Support Engineering Group | mbg at world.std.com (home) | | Hewlett Packard | (s/ at /@/) | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 (DEC '77-'98) | required." - mbg KB1FCA |

22 years, 11 months

1
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286SLT powerconfig

by metallicaman1234＠earthlink.net

what is the pin input power configuration of the 286SLT laptop and how many volts/amps is it. Also what about the battery pin config and its voltages?

22 years, 11 months

1
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Where can one find 2.5 inch floppy disks, and other odd

by lgwalker＠mts.net

A reply to an old thread, but since I'm no longer subscribed to the list, but occasionally monitoring it, understandable. I have an old Roland PR100 sequencer. It and some other audio equipment (Akai 612 ?) as well as a Smith- Corona word processor used a 2.8 Quick Disk (flippy). I found a company that still sells the disks: http://www.esticortland.com Part #061838 but not cheap at $12.25 Lawrence ------- End of forwarded message ------- lgwalker@ mts.net

22 years, 11 months

1
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Significance of an Apple II w/ raised power light?

by nickmiller＠charter.net

Hello, I have an original Apple II with a keyboard power on light that is raised above the case and sits in green piece of plastic. I've seen this style of Apple II in old advertisements but have not been able to find out the significance of this variant if there is one. I'm finally getting around to working on my website again and would like to address this feature, any comments would be appreciated. Thanks, Nick

22 years, 11 months

1
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Vintage Computer Message Board

by classiccmp＠vintage-computer.com

Hello, I would like to announce a new message board that I have created in support of our community. During the past couple of years I?ve been participating as a member of this mailing list as well as several related ones. I have made a few observations that I felt needed addressing including: - the need for a better way to advertise items or help (wanted or offered) - the ability to support off topic conversations along with on- topic ones without burdening those not interested in one or the other - the ability to easily search archives for topics of interest - the ability to keep ?threads? of discussion together - the ability to categorize these threads for easier research With the above in mind I decided to experiment with a web based bulletin board (a long way from my days with RBBS and WWIV). Over the past month or so I have changed my web hosting service for www.vintage- computer.com in order to work with a hosting company that could support the new forum I was considering. Over this past weekend I finished the initial phases of moving my site and configuring the boards. The result is now available for use at www.vintage-computer.com/vcforum. A link is also available from my www.vintage-computer.com front page. Since my web hosting has been recently moved the new DNS information may not have completely propagated yet. If you get an error trying to access the above address or if the message board link from my home page refers you to an ezBoard page, please try back a little later. There are two things that I would like to stress about the new forums. First, I don?t envision them as a threat to this mailing list or the community that supports it. I see it as another tool in our toolbox (or toy in our toy chest) to enhance our enjoyment of our hobby. Second, although I set up these forums I consider them to be ?ours? in as broad a sense as that is possible. I am not only willing, but anxious to have others participate in these forums as administrators, moderators and contributors. Volunteers are welcome and operators are standing by! Hopefully if you are reading this you will see your way clear to popping over for a visit and supporting this effort with whatever you are willing to offer, be that participation, suggestions or criticism. Again, this is our community and I will do my best to make these forums reflect that. Thank you and best regards, Erik S. Klein www.vintage-computer.com

22 years, 11 months

2
1
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77/68 computer (was Seeking good home...)

by Paul.HILLS＠landisgyr.com

Andy, I guess the Electronics and Computing Monthly magazine and Stirling Microsystems must have based the design on the ACC one. The ECM design was on 8" square boards too, single sided tracks (you had to run loads of wire straps!). I still have all the documentation for it, paper-based at the moment. There was a choice between a 40x24 monochrome display board implemented entirely in 4000-series CMOS (which I built), or a newer colour board with 64K RAM and a Thomson EF9365 Graphic Display Processor. I didn't build that since the cost of 64k RAM in 1982 was prohibitive! That processor could draw at 1 million pixels per second - impressive for 1982. Some of the documentation is published by Newbear (Newbury Electronics), and some by Stirling. One day I'll get around to scanning all the docs in for general availibility. paul -----Original Message----- From: Andy Holt [mailto:andyh@andyh-rayleigh.freeserve.co.uk] Sent: 19 April 2003 20:40 To: cctalk(a)classiccmp.org Subject: RE: Seeking good home(s) for old hardware [UK] > Getting on 20 years ago I built a 6809 based computer from a > series running in the UK magazine "Electronics & Computing > Monthly", called the 77/68 system. This was based on the SWTP > stuff but was marketed through a company called Stirling > Microsystems in Baker Street, London. Does anyone else here > remember that system? ... As I remember it, the 77/68 was published in the ACC newsletter (not in E&CM) - the original was a rather neat design by Mike Lord on 8" square PCBs. I built a seriously extended one of these (which eventually "fissioned" into two complete systems - connected by a homebrew network that was a sort of very cheap slow ethernet). Some boards were from the original design - others I designed and implemented myself ... most notably including a 6809 board (the original was a 6800) with the only technical data being a pin-out and some other vague descriptions in a Byte article. It was a couple of years of successful use before I discovered that I was feeding the clock in through the "wrong" pin! Amongst the peripherals that this system acquired was a large Calcomp plotter surplus from the University mainframe. Unfortunately most of the hardware and documents have now been recycled or worse. Andy

22 years, 11 months

1
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HP9915

by ard＠p850ug1.demon.co.uk

I've recently had an HP9915 on the bench. This, as many of you are aware, is related to the HP85, but it's in a metal case with no printer, keyboard (although there is a keyboard connector on the back) or monitor (again, there's a composite video output on the back). Some details of the insides : Almost all the HP ICs are the same as those in the HP85 (CPU, CRT controller, RAM controller, Keyboard controller, ROMs, I/O buffer, even the printer controller is there). Much of the rest of the circuitry is similar to that in the HP85 (PSU, etc). There's an extra 8048 microcontroller that handles the power-on reset, self-test and autostart keys, and the front panel LEDs. It connects to the HP CPU via an I/O Translator IC, which is the same as the one used in the HP85 interface modules. Also linked to this microcontroller is a PCB that can contain up to 8 2716 (or 2732 if you rearrange the links) EPROMs. I have no idea (yet) how to format data to put in said EPROMs. The large board in the bottom of the case contains the PSU, and much of the logic circuitry. There are 6 'option ROM' spaces at the back of this board, identical to those in an HP85 ROM drawer. The PSU provides the same voltages, in much the same way, as the HP85 CPU. The output of the transformer is rectified and fed t oa switching converter (U30, 3524 is the controller IC) to provide +12V, -5V and -12V. This poweres a second switching converter to provide +5V. The +6V is obtained by a linear regulator. There is a crowbar (Q4) which will short out the input to the first PSU if the +12V line rises too high. This will then blow the mains fuse (something to check if the mains fuse blows at switch-on -- maybe Q5, PIC645, the first chopper is shorted). Another PCB plugged into the left edge of the main PCB contains the video RAM, printer chip (used here for the timers, I suspect), buffers/clamp networks for the keyboard and control connectors, a state machine to generate the video sync signals, and the composite video mixer. It has been suggested this is the 'operator interface' mentioned on the options box on the back, but I think not. I think this must be a standard part of the machine, and that the 'operator interface' is the keypad on the front. Talking of the keypad, the top 4 keys are connected as the k1-k4 keys of the HP85 keyboard. The blue key is connected as the shift key. On the back of the machine (actually on the vertically-mounted PCB that I mentioned a couple of paragraphs back) are 2 D connectors. The pinouts seem to be : Keyboard (DB25) 1 : chassis ground 2 : R0X (this is Row 0 output, buffered) 3 : R1X 4 : R2X 5 : R3X 6 : R4X 7 : Logic ground 8 : Logic Ground 9 : R5X 10 : R6X 11 : R7X 12 : R8X 13 : R9X 14 : C0X (Column 0 input, buffered) 15 : C1X 16 : C2X 17 : C3X 18 : C4X 19 : C5X 20 : C6X 21 : C7X 22 : KSX/ (Shift key, connect to logic ground to shift) 23 : KCX/ (Control key, ditto) 24 : KCLX/ (Caps lock key, ditto) 25 : SpkrX (Speaker output, return to logic ground) Control connector, DA15 1 : LED0X (High if top LED on frontpanel is on) 2 : LED1X 3 : LED2X 4 : LED3X 5 : LED4X 6 : LED5X 7 : LED6X 8 : LED7X 9 : RunX/ (RUN LED output) 10 : TestX (selftest LED output) 11 ; PWOX (Power OK output) 12 : Logic ground 13 : KeyStartX/ (ground for autostart key) 14 : KeyStX/ (ground for self test key) 15 : Chassis ground. The keyboard matrix would appear to be the same as that in the HP85 OK< a couple of questions 1) What is the impedance of the speaker in the keyboard (presumably between SpkrX and logic ground? 80 ohms? 2) What is the OD of the tape drive roller? Mine has decayed (what a suprise), and I need to rebuild it. It should be the same as the roller in the HP85, the HP9825, HP9815, etc.... -tony

22 years, 11 months

1
0
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Soroc IQ120 Chip Problem

by marvin＠rain.org

I finally started digging in to find out what was wrong with a couple Soroc IQ120s. The first one was easy; just a memory chip (2102) that went bad. The second one is a bit tougher. I *think* I have the problem narrowed down to a Signetics 82S201 PLA, and therein lies the problem. Is there a replacement chip available, and is the coding of the chip available? If the coding is not availble, can I just go through a counter on the input and record the output states to come up with the chip programming? Needless to say, I am not real familiar with these devices :). There are two of these devices in parallel, and when I pull out the supected bad one (one makes no difference, pulling the other one starts the screen display again), the screen starts to work again. My suspicion is that the two are in parallel to increase the drive to the other chips. There are probably more problems since I don't hear the beep when the unit is turned on. The keyboard unit has already been checked out on the working Soroc. Any thoughts or comments?

22 years, 11 months

1
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Northgate OmniKey Ultra

by fmc＠reanimators.org

David Holland <dholland(a)woh.rr.com> wrote: > I've had it for about a week now, and just can't get used to funky > arrangement of the arrow keys in the middle, and the F keys on the left > just throws my Unreal Tournament gaming off. So we know it's one of the sort with the Omni key instead of an inverted-T layout. If it's an Ultra, it should also have the function keys across the top. > Anyways, I gather these things were something of a 'gotta have it' > keyboard at one time, and were bloody expensive. Not that bad. In the mid-1990s you could get them for about $70, which seems expensive for a keyboard, but for those of us who really wanted the control key to be to the left of A and didn't want to have to fuss with driver software to make it happen, it was well worth it. If you want expensive, go check out the Avant Stellar! That is reportedly the modern Northgate OmniKey, and it sells for about $150. > I gather it might of came with some extra keycaps when it was new, so > you could move around control/shift. I do not have those. So, some questions to help folks ID what you've got. Is the control key to the left of A? Where are the switches? Poking out the back, or hidden under the "OmniKey" flip-top lid, or not present at all (flip the lid up, see nothing)? Not present at all means it is a late-model programmable keyboard. They had firmware bugs, and the "fix" was "remove the EEPROM that holds the key remappings". > Anyone want it? (I think this is at least on-topic) Somebody better! -Frank McConnell

22 years, 11 months

2
1
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HP's Amigo Protocol, HFS

by peterbrown10＠hotmail.com

Hi Joe, The drive is a 9134XV - serial number begins with 23 so I guess that it would be from around 1983. If I look at the drive with an HP 9000 332 it sees an HFS partition - with basic 6.0 binaries :). When I ask the drive to identify itself it returns a pair of bytes that I don't recognise (1 and 15 from memory but I could be wrong). This pair of bytes is not the same as the pair that would be returned by a CS80 drive. I managed to check the reader software with a pair of 9133 drives, a 9134 drive (which fails) and a 7907 drive (this identifies itself correctly but appears to have been wiped of data at some time). I have some other software recorded on 7906 removable cartridges - does anyone know if an HPIB version of this drive was made? - I think that the model number may be 7906H but I have no further information. Does anyone have a 7906H tht they don't need? Cheers Peter Brown _________________________________________________________________ On the move? Get Hotmail on your mobile phone http://www.msn.co.uk/mobile

22 years, 11 months

2
1
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VCF Europa Live

by vcf＠siconic.com

I fixed the VCF Europa Live pages from the vintage.org server. To see live pictures from VCF Europa 4.0, go here: http://www.vintage.org/2003/europa/ ...and click on "VCF Life". Look for the guy in the Blue Shirt and that will be Hans (Hansi Smurf). -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org * Old computing resources for business and academia at www.VintageTech.com *

22 years, 11 months

1
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HP's Amigo Protocall & HP IPC

by rigdonj＠cfl.rr.com

Yesterday I was cleaning out and putting some excess HP manuals on E-bay. One of the books that I found, HP-UX Concepts and Tutorials - Device I/O and User Interfacing, looked interesting but was still sealed so I listed it without opening it to see exactly what it covered. (I'm not real big on HP-UX). Today I found another copy of the same manual. It was alreadu opened so I've been reading through it. First, it DOES cover the HP IPC (Intergral Personal Computer) along with the HP 9000 Series 200/300, Series 500 and Series 800 computers. Each function that only applies to certain systems is flagged and there are appendices for the IPC and each of the other series that list and describe any peculiarities of that implementation. BUT what was even more surprising is that it states that many of the HP printers use the Amigo protocall! For the ones of you that aren't familiar with HPs that protocall is used for low end disk drives. This is the first time that I've heard that was also used for printers. Besides that statement it also has a "non-trivel" programming example of an "HP-IB driver that uses the Device I/O Library subroutines to drive various models of the HP Amigo protocall HP-IB printers". This might be a good starting point for anyone that wants to write and Amigo driver to talk to disk drives. Are you listening, Sergio and Peter? This book is definitely a keeper! It describes the HP-IB and GPIO interfaces for the various systems in detail including their status and control registers. It then describes how to use the DIL (Device I/O Library) included with HP-UX to set, read and control the interfaces and how to link calls to the DIL from Fortran, Pascal and Assembly language programs. It looks like a great source of info for anyone that wants to write their own device drivers or wants low level control of HP-IB and GPIO interfaces under HP-UX. I'm keeping this copy but I have another one that's already on E-bay. I know this sounds like a shameless plug but it's not. I'm just really impressed with this book. Joe

22 years, 11 months

1
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MicroVAX4000/505A drive sleds

by ClassicComputers＠bouncy-castle.demon.co.uk

Just acquired a VAX 4000/505A (thanks Paul!) with no disks installed - anyone got the details for adding a raw DSSI disk to one of these things ; the chasis has a drive backplane at the top with 4 edge connectors, into which a drive sled of some form slots in. I need to knock up whatever is on the sleds, drive LEDs & switches. Unless anyone has some excess sleds that I could liberate?... Ohhh, wonder if the MDS pils of docs has any details on this - off to look now :) ta greg

22 years, 11 months

2
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VCF Europa 4.0

by vcf＠siconic.com

This weekend is VCF Europa 4.0 in Muenchen, Deustchland! Complete information is on the VCF Europa website: http://www.vcfe.de I look forward to reports from those that make it since I won't be present this year :( -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org * Old computing resources for business and academia at www.VintageTech.com *

22 years, 11 months

1
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Heathkit EC-1

by dwightk.elvey＠amd.com

>From: "Doug Coward" <mranalog(a)attbi.com> > > Ethan wrote: >> How does a resistive sheet computer work? > > I wrote: >> Resistive sheets belong to a category of analog >> computing called network analyzers. > > Oops, I need to correct this. > Resistive sheets belong to a category of analog Hi This is the place to describe my method of finding shorts on power planes. This is very much like the resistive sheet methods. You place a power supply across one of the two planes that has shorts between them, such that about one or two amps is flowing in current limit. You place one lead of a volt meter on the opposite plane and then probe with the other lead on the plane with the current flowing across it. You find a line where the meter reads zero. Now, move the power leads to an orthogonal corners. Again fine the line of zero volts. Where the two lines cross, you'll find the short. There are variations of this method for finding shorts between traces and even multiple shorts. Dwight

22 years, 11 months

1
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Heathkit EC-1

by dwightk.elvey＠amd.com

>X-Server-Uuid: 262C4BA7-64EE-471D-8B02-117625D613AB >X-Authentication-Warning: huey.classiccmp.org: mailnull set sender to cctalk-admin using -f >From: "Doug Coward" <mranalog(a)attbi.com> >X-Accept-Language: en >MIME-Version: 1.0 >To: cctalk(a)classiccmp.org >Subject: Re: Heathkit EC-1 >X-BeenThere: cctalk(a)classiccmp.org >X-Mailman-Version: 2.0.10 >List-Unsubscribe: <http://www.classiccmp.org/mailman/listinfo/cctalk>, <mailto:cctalk-request@classiccmp.org?subject=unsubscribe> >List-Id: General Discussion: On-Topic and Off-Topic Posts <cctalk.classiccmp.org> >List-Post: <mailto:cctalk@classiccmp.org> >List-Help: <mailto:cctalk-request@classiccmp.org?subject=help> >List-Subscribe: <http://www.classiccmp.org/mailman/listinfo/cctalk>, <mailto:cctalk-request@classiccmp.org?subject=subscribe> >List-Archive: <http://www.classiccmp.org/pipermail/cctalk/> >X-Original-Date: Fri, 02 May 2003 11:59:27 -0700 >Date: Fri, 02 May 2003 11:59:27 -0700 >X-WSS-ID: 12AC63976885576-01-01 >Content-Transfer-Encoding: 8bit > > Ethan wrote: >> How does a resistive sheet computer work? > > Just a quick note for now. > Resistive sheets belong to a category of analog >computing called network analyzers. > >> In the same vein (pun intended)... how would fluidic computers >> stack up? Digital? Analog? Mixed? > > Fluidics (or fluid logic) can have both analog >and digital processes. You can perform boolean >operations, but you also can have fluid amplifers. Hi An interesting side note. The power steering of your auto is an example of an analog fluid amplifier. Dwight > --Doug >========================================= >Doug Coward >@ home in Poulsbo, WA > >Analog Computer Online Museum and History Center >http://dcoward.best.vwh.net/analog >=========================================

22 years, 11 months

7
13
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Northgate OmniKey Ultra

by dholland＠woh.rr.com

Howdy all, I stumbled across a Northgate Omnikey Ultra (not UltraPlus) keyboard in the local thrift store, and picked it up for 5$. (It had a nice feel, kinda PS/2'ish, and no stupid windows, or various other internet/volume controls/etc keys.) I've had it for about a week now, and just can't get used to funky arrangement of the arrow keys in the middle, and the F keys on the left just throws my Unreal Tournament gaming off. (See http://www.northgate-keyboard-repair.com for some piccy's) Anyways, I gather these things were something of a 'gotta have it' keyboard at one time, and were bloody expensive. Thought I'd offer it up here, for 5$ + shipping before it goes downstairs in the basement to collect dust. One thing to note, is its got one of the AT style connectors in back, so you'll need an adapter if your going to plug it into a PS/2 style connector. (No, you can't have the one I was using) Visually, its pretty clean, there's a little green stuff on the bottom where I attacked (mostly ineffectively) some sticky stuff w/ a scrubbing sponge, but the top is (imho) nice and clean. I think all the keys work, however, there might be a few F keys I didn't hit the week I was using it. I gather it might of came with some extra keycaps when it was new, so you could move around control/shift. I do not have those. Anyways, enough disclaimers, Anyone want it? (I think this is at least on-topic) David

22 years, 11 months

1
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Analog auto systems (was: Heathkit EC-1

by dwightk.elvey＠amd.com

>From: "Fred Cisin (XenoSoft)" <cisin(a)xenosoft.com> > >> > > I don't think _my_ auto (1968 Beetle) is an example of that. :-) >> > Well, now - not so fast! While your Bug may not have power steering, >> > if it's got an automatic transmission... >> Nope... 4-speed manual. There was this thing called an "auto-stick", >> but that was a servo-operated clutch (and an ordinary manual transmission) >> that engaged when you began to move the stick. You still shifted, but >> you didn't clutch. > >I don't think that I would call a torque converter a "servo". > Hi I put a brake servo on my '53 power wagon. That is gone now. The storm this last winter blew over a 147 foot Douglas Fir onto it. It push all 4 tires into the ground, down to the axles, and the axles to the frame. I think this is when the body finally gave. Dwight

22 years, 11 months

1
0
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Heathkit EC-1

by dwightk.elvey＠amd.com

>From: "Ethan Dicks" <erd_6502(a)yahoo.com> > >--- "Dwight K. Elvey" <dwightk.elvey(a)amd.com> wrote: >> Hi >> An interesting side note. The power steering of your >> auto is an example of an analog fluid amplifier. >> Dwight > >I don't think _my_ auto (1968 Beetle) is an example of that. :-) > >-ethan Hi Actually, now that you mention it, my '68 Fiat 124 Spider isn't either but it does have a vacuum booster on the master cylender. I guess well have to buy newer examples of analog amplifiers. Dwight

22 years, 11 months

4
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Looking for a 11/44 in denver area / colorado

by emu＠ecubics.com

Hi, Anybody out in colorado with a "spare" 11/44 ? Or even just a power supply for a 11/44 ? cheers & thanks

22 years, 11 months

2
1
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Neat find (in my own junk bin!) - NS 8073

by erd_6502＠yahoo.com

I was collecting all of my hex LED displays into one place so I can test them before embarking on a new 1802 project. I even dug into my old box of spare Elf parts and pulled out a small board with four TIL311 displays attached to a small microcontroller board - some kind of monitor/indicator given to me by the brother of the guy that got me into the 1802 as a kid. He had given it to me to harvest the TIL displays. I finally *looked* at the attached board to see what was on it - an NS 8073! I used to have access to an RB5X robot when I was a volunteer at the local science museum in High School - same chip - the hot-item-for-a-brief-moment microcontroller with embedded Tiny Basic. Now, rather than harvest the parts, I'm very tempted to reverse-engineer the schematic of the little board to see what it does. Looks like there's a small bipolar PROM, a 6116 SRAM, one or two TTL chips, and the TIL311s driven by the output pins of the 8073. The whole thing is only a few square inches. The funny thing is that I'd recently picked up a few 8073s from ePay to play with. I was planning on hooking them up to some 8031-based 8-line LCD displays I got for a few bucks each (originally out of some flavor of AT&T office phone, IIRC). Sort of the Classic Attraction principle in reverse - new toys attracting alike items >from the recesses of the junk box rather than the normal way 'round. Has anyone else played with the 8073 (in an RB5X or not)? If they hadn't been so pricey 20 years ago, I might have gotten one to experiment with back then. -ethan The New Yahoo! Search - Faster. Easier. Bingo. http://search.yahoo.com

22 years, 11 months

1
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Heathkit EC-1

by mranalog＠attbi.com

Ethan wrote: > How does a resistive sheet computer work? I wrote: > Resistive sheets belong to a category of analog > computing called network analyzers. Oops, I need to correct this. Resistive sheets belong to a category of analog computing called passive element computers in which network analyzers are probably the biggest and most well known examples. But it also includes * conductive sheets * electrolytic tanks - create 3 dimensional simulations * resistor networks * pin and rod systems * resistor and capacitor network Passive element computers normally models a physical system using only passive R-L-C components, and solve equations in which dimensions in space are the independent variables, rather than time. Applications for passive element computers include things like the simulation of * reception patterns of a receiving antenna * temperture, and pressure flow in a nozzle * diffusion of material at a transistor junction Here is an example: You solder together a large two dimensional matrix of resistors (all the same value). At each node where the resistors are soldered together you solder a capacitor connected to ground. You then apply a voltage to one corner of this resistor and capacitor network. As the current flows through the network it begins to charge the capacitors. You now have a computer that simulates the heat flow across a metal plate the size of your matrix, both over distance and over time. Without the capacitors you are simulating only over distance. A resistive sheet is a resistor matrix with a very fine mesh. The finer the mesh, the better the simulation. "Rubber-sheet computers have been used extensively to study the trajectories of electrons and gas ions in vacuum and gas tubes" -Doug ========================================= Doug Coward @ home in Poulsbo, WA Analog Computer Online Museum and History Center http://dcoward.best.vwh.net/analog =========================================

22 years, 11 months

1
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HP Amigo command set and HFS disk format

by peterbrown10＠hotmail.com

Hi All, Looks as though the CS80 / LIF part of my HPIB disk reader/writer is working OK now - thanks to those who gave me pointers. I've come across another HPIB hard disk that that uses the Amigo command set (- I think) and contains data in HFS format. Does anyone have full documentation for these two standards in .pdf format? Cheers Peter Brown _________________________________________________________________ On the move? Get Hotmail on your mobile phone http://www.msn.co.uk/mobile

22 years, 11 months

2
1
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256x4 80NS or faster

by anheier＠owt.com

I have a fair quantity of the following: P21256-12 MCM6256BP12 Lh21256-12 MTC4c1024-8 KM41C1000BP-8 thanks Norm snip: >Date: Tue, 29 Apr 2003 11:37:28 -0700 >To: classiccmp(a)classiccmp.org >From: Geoff Reed <geoffr(a)zipcon.net> >Subject: 256x4 80NS or faster >Reply-To: cctalk(a)classiccmp.org >anyone have any of these floating around? I can't believe I gave 'em all >away and now I need to populate a laserjet IIID memory board :(

22 years, 11 months

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