test-drb

test-drb@ccmp.vtda.org

101090 discussions

by mythtech＠mac.com

>Pretty much any copy protection system for video can be defeated by putting >a >time base corrector in the analogue signal path between the source and >whatever you are recording it on. Yup, that is why I currently dub macrovised VHS by passing them thru my computer. My PowerMac has a NTSC/PAL input, and will output NTSC or PAL. I feed the video into the mac, then run the video player software in full screen, and record the video output. It actually makes VERY nice duplicates, and defeats macrovision in the process (since I'm not really recording the original video, but rather a screen image of my computer, that just happens to have the video playing in full screen mode). But I think Apple got wise to that, because reports are you can't do the same thing with the DVD player and video mirroring (although with an external scan converter I would think you can, but not with the built in S-Video output on their newer Powerbooks). Of course, now that I just discussed this, I am in violation of the DMCA, so the Thought Police should be knocking on my door any moment now. Lucky for you, you live in a country that seems to be a bit more rational and citizen friendly (didn't Australia just pass a law that pretty much says Macrovision is illegal or something to that effect?) -chris <http://www.mythtech.net>

23 years, 7 months

OT: dumpster dive and water/mold cleanup

by mythtech＠mac.com

>I think some of the 78s I got went to a Victrola at one time. I know there >was a Victrola over there that went to a family member, but I don't think >any records went with it. I guess that dates those 78s even older than I >thought they were. I had also noticed a couple had minor chips in their >edges, and thinking about it now, they very well might be ceramic. I >noticed an almost glass or sand-like appearance to the chipped spots. If you don't have a use for those, and want to part with them REAL cheap, I might be interested in taking some of them off your hands. Not that I am a collector of these things, but a variety of records to play on my Victrola would be nice (I only have about 20 right now, and most of those I am afraid to actually play... not to mention I only have a few new needles left, so until I can figure out a safe replacement, or a safe way to sharpen old needles, I don't really use the thing at all except to show it off to people once in a while... my 1950's Rockola juke box gets the bulk of the entertainment use, but that uses off the shelf record needles, and standard 45's, so its much safer to play away with) -chris <http://www.mythtech.net>

23 years, 7 months

Drive-95 RE: Serial floppy drives

by rigdonj＠cfl.rr.com

Drive-95 is (was?) made by Sparcom and was originally made for the HP-95 then for the HP-200 and later for the HP-48. I won one at a HP conference a couple of years ago and Megan (the owner of Sparcom) promised me that I could send it back to the company and have it upgraded to later version. I've been meaning to do that. AFIK Drive-95 is still being made and sold. Joe At 10:05 AM 9/3/02 +1000, you wrote: >One existed for the HP-48 series of calcs. It was called (I think) >drive-95. > >The device used serial, and kermit to communicate with the calc for program >storage. > >(I *reallllly* wanted one of those...) > > > >Doug Jackson >MSS Operations Manager >Citadel Securix >(02) 6290 9011 (Ph) >(02) 6262 6152 (Fax) >(0414) 986 878 (mobile) > > > >> -----Original Message----- >> From: Fred Cisin (XenoSoft) [mailto:cisin@xenosoft.com] >> Sent: Tuesday, September 03, 2002 8:40 AM >> To: cctalk(a)classiccmp.org >> Subject: Re: Serial floppy drives >> >> >> On Mon, 2 Sep 2002, tim lindner wrote: >> > Did anybody ever market a floppy disk system that communicated via >> > RS-232? >> >> Yes, but, ... >> Only one really "caught on" >> Radio Shack "Portable Disk Drive" was sold for the Model 100. >> It was serial, but not quite RS-232. The first version was >> Single-Density? on a 3.5" disk. >> >> > > >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 > > >Attachment Converted: "C:\EUDORA\Attach\RESerial.htm" >

23 years, 7 months

Serial floppy drives

by dwightk.elvey＠amd.com

>From: tlindner(a)ix.netcom.com > >> On Wed, 4 Sep 2002, Tony Duell wrote: >> > However, the original question mentioned RS232. Which is _not_ the same >> > as serial. RS232 implies certain voltage levels. >> > The CBM and Atari drives do not use an RS232 interface. >> >> AND,.. >> If I recall correctly, the Tandy Pdd1, although it was "almost >> RS-232" used TTL, NOT RS-232 voltage levels. There were some trivial >> adapters available to permit it to work with "real" RS-232 signals. > >I always thought that was called RS-422. > >The Macintosh standard serial port was a RS-422 serial port. When I went >to look up what that meant, the only difference I could find was the >voltage levels. > >RS-422: 0v to 5v >RS-232: -5v to 5v > >The documentation I found went on to say that RS-422 was backaward >compatiable with RS-232. > >-- >tim lindner tlindner(a)ix.netcom.com > Hi No, 422 is not backwards compatible with 232. RS-422 and RS-485 are both specs for driving differential lines. RS-232 can be +/- 12 volts but the receiver may have lower levels ( I forgot what the requirement was ). The document was not correct about RS-232/RS-422. It may be that one could make them work under specific conditions but these signals are not backward compatible. Dwight

23 years, 7 months

IBM Aptiva for parts

by rschaefe＠gcfn.org

Move-out week is over on campus, but I decided hit a couple of alleys on the way home anyway. The only thing of interest I found was a skinless, stripped Aptiva that I nearly passed up, but then I noticed that the slots were on an active riser card so I picked it up anyway. The power supply has some extra wires on it, too. I figure these are odd enough to be hard to replace if you get a bad one. If anyone wants the parts for $postage, let me know. I've got: motherboard, FRU 11H8440 no CPU, no RAM, no cache, video RAM upgrade not installed, has a jumper board installed in the VRM slot `7x6 riser', FRU 11H8453 6 ISA, 2 PCI (1 shared), has some active components on it power supply, FRU 06H2973, P/N 06H2971 has 3.3V, and an extra connector, keyed 3 pin with a latch, 22GA black, white, & red modem/sound card, 42H1970 ISA, Mwave `MC27802C JSW/JBR', `MD-2780/I1', `GVC-KD070101', has a little 2-conductor cable that attached to the motherboard (not CD audio) Bob

23 years, 7 months

These darned old computers

by foo＠siconic.com

Well, I finally had some success with these old computers I've been trying to get working. The Atari problem ended up being with the power supply. Its plug did not properly fit the power receptacle on the computer. Once I got the proper power supply it worked like a champ. More like I remember the last time I played with an Atari 800 a few years ago. Then, I was amazed at how easy it was to get up and running with a disk-based Atari 800. Everything is total plug and play (but for real). I now like the Atari 800 :) The TRS-80 M3 was a LOT of work but I finally got it running. It turns out the problem with most of the units I tested most likely was a bad keyboard or just my ignorance in not knowing how to boot it into BASIC ;) I finally found one that had a decent keyboard and would boot to BASIC if I held down the BREAK key upon boot-up or after a reset. I wanted to make one nice machine out of two that I had. I moved the good keyboard to the nicer one. The nicer one didn't have the serial port board, so I moved it from the yucky one to the nice one. No wonder RS wanted you to bring the machine in to the service center to get it upgraded. This is NOT an easy computer to work on. I had to unscrew everything to remove the motherboard to both take out the card on the one and install it on the other. Also, there is a power cable that is added for the serial port option when it's upgraded, so I had to cut the zip ties holding the cable in place on the old one to move it to the new one. What a shit design. The stuck brightness and contrast knobs were fixed with a healthy helping of Deoxit, which is this deoxidizing agent. I worked the knobs back and forth and they loosened up nicely. Now everything works great. I now like the TRS-80 Model III :) The Commodore 64 I have is just plum dead. Or at least it seems to be. The video cable I am using has four connectors on it: red, yellow, white and black. The 1702 monitor has three jacks on the back: chroma, luma and audio. I tried all different combinations trying to get video on the display but no die. What's the deal with that? I think I'm using the wrong video cable, but all the C64 stashes I check turn up this 4-connector cable. I forgot to bring home the spare C64's I was going to have as stand-by's so I don't currently have another C64 to compare with. I know I have a three-connector cable that I'm sure goes to the C64 but I cannot find one for the life of me. Grrr. I still hate the C64. The Radio Shack Color Computer 2 is confusing. And somewhat lame. I have to go find the disk controller carthridge to attach disk drives to it. Then I have to find the proper disk drives. Fine. But I can't figure out the video. I want to connect it to an Amdek color monitor. The only video jack is the RCA type on the back that seems to be a built in RF modulator. So needless to say I don't get video on the display. I can't find any mention on the web of adding an external monitor to the CoCo. The CoCo2 is lame. I do not like the CoCo2. Any idea on how to hook the CoCo2 to a composite monitor? 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 *

23 years, 7 months

Stuff available in UK

by pete＠dunnington.u-net.com

It's that time again -- time to clear a little space. Here are a few things I need to get rid of, some are things that I part with only reluctantly because I've had them a while, some are things that have been replaced with "better". All have to go *soon*. PDP-11/23 in a BA11-N box (upgraded to Q22, so equivalent to BA11-S) with 11/23 processor, memory, serial lines, etc. This was the first PDP-11 I ever had, but it has to go to make room for an even more interesting one. Free to a good home: Dual 8" double-sided floppies in a 3U-high rackmount case with 240V power supply. 50-pin SA850-type interface. Very nice unit made by Baydel (of RAID fame). I might also have a Q-bus floppy controller to go with this; it was once used with the 11/23 above. PDP-11/24 system chassis (also 3U high) and boards, including CPU and KT-24 Unibus map, maybe some others. Trust 9600 SP+ A4 colour scanner and SCSI interface card, with documentation and floppies. Works well under windows, not quite so well under Linux/SANE. I might also have a DEC TS11 and TS03 tape unit going spare. A few assorted DEC (and other) bits available to anyone who collects any of the above. Lastly, my much-loved Star LaserPrinter 8. This is a laser printer based on a Canon SX engine, like an HP LaserJet II. Originally with 1MB of memory, upgraded to 2MB, so it can handle a whole page of graphics plus some extra fonts/forms. Parallel and serial interfaces. In very good clean condition, it's had about 26000 pages through it from new (I bought it around 1988). I'd like to get (a small amount of) money for this. I would consider trading any of the above for a Unibus disk controller, a Viking QTD controller, or a TU56 ;-) -- Pete Peter Turnbull Network Manager University of York

23 years, 7 months

OT: dumpster dive and water/mold cleanup

by dwightk.elvey＠amd.com

>From: "Chad Fernandez" <fernande(a)internet1.net> > >William Donzelli wrote: >> You can not reuse needles, nor can you sharpen them. With the >> acoustic-era machines, needles are used exactly *once*. Play the record, >> then pitch the needle. If you reuse needles, you will wreck the records. >> >> Needles are very available from several sources. They are quite >> inexpensive (they have to be!). >> >> William Donzelli >> aw288(a)osfn.org > >Wow, that is something I didn't know. I have zero knowledge on acoustic >era anything :-) > >That would be a pain. > >Chad Fernandez >Michigan, USA Hi The original Edisons all used diamond needles and could get thousands of plays. Many of the acoustic setups used cactus needles and one could sharpen them with a twizzle thing that had sand-paper to sharpen them. Dwight

23 years, 7 months

OT/Old Recordings/Shameless Plug

by healyzh＠aracnet.com

> >My current archival project involves shifting Laserdisc's to DVD-R. I'm > >embarrassed to admit that I've resorted to using a system running Windows > >XP. > > Why XP instead of 2000? My Tivo -> SVCD projects went 15-20% slower on XP > vs. 2K, so I dropped back. I *despised* that damnable kandy-koted GUI crap, > too... As much as I despise Microsoft products I've found that I can almost stomach Windows XP Pro unlike any previous version of Window or Window NT since Windows 3.11. Plus it has some features that I like. Since I don't have a dedicated system for this, XP is the best choice. If in the future I do go with a dedicated system I'll put NT2k Pro on it, as I've already got a legal copy I can use for that. Actually considering it can take 40 hours to encode a disk using the options I'm using, a dedicated system is starting to make sense. "^) > My results are better than VHS, as I've never seen SVHS in action, I can't > say about that... not quite as good as DVD. But... hey... whaddya want for > $0.20 per disc??? :-) http://tivo.30below.com/zmerch/ -- for my methods; > maybe you'll find a nugget of info there to help you out? I'll have to take a look at it. I've been looking at using VCD for shifting VHS and TV. I've run into a really wierd problem though. The audio on my AVI capture (I use a Canopus ADVR-100 hooked to a firewire port) sounds fine, but when I encoded it to MPEG1 (VCD spec'd), it has a high pitched whine. I don't get the whine if I encode it as MPEG2 for DVD. So far I've only experimented briefly with this using a TV signal as the VCR in the computer room is an old ~1990 GE model with Mono audio and I'm using fairly cheasy cables to hook it up to the ADVR-100. I'm wondering if that might not be part of my problem. As on the AVI or MPEG2 file I think I can hear a 60Hz hum. I'm going to look into getting a decent VCR for the computer room in the very near future and experiment more. Zane

23 years, 7 months

OT/Old Recordings/Shameless Plug

by jpl15＠panix.com

I have offered audio restoration services for many years, from any (and all) types of recorded audio media - cylinders, wire, tape: paper, plastic, sprocketed, 2MM to 4"... etc etc. I restore damaged media and do forensic work. That being said, if any list members have a few bits of recorded stuff lying about that you'd like cleaned up and transfered to a CD, contact me off-list. Obviously for big and/or complex jobs we'd need to discuss a fee structure, but for the occasional disc, old tape, or spool of wire that can be rolled into ProTools and dumped to a disc... why not? I imagine that this would extend to data cassettes with FSK or other audio-freq modulation schemes, so it's not *that* badly off-topic. :) Cheers John

23 years, 7 months

OT: dumpster dive and water/mold cleanup

by Robert_Feldman＠jdedwards.com

Tried RadioShack? -----Original Message----- From: Russ Blakeman [mailto:rhb57@vol.com] Sent: Wednesday, September 04, 2002 2:07 PM To: cctalk(a)classiccmp.org Subject: RE: OT: dumpster dive and water/mold cleanup If y ou come across a vendor that also sells new stylus units for the tone arms of turntables you might post that too - my long term source dried up last year <snip>

23 years, 7 months

OT: dumpster dive and water/mold cleanup

by mythtech＠mac.com

>Antique electronic supply has some. www.tubesandmore.com >They are good for 12 plays each. Package of 25 for $1.95 Thanks, I'll check them out. -chris <http://www.mythtech.net>

23 years, 7 months

FA: CompatiCard IV, old Pop Electronics with 2650 SBC, S-100 SpeechLab, SOL Access & more

by rigdonj＠cfl.rr.com

Still cleaning up around here! See <http://cgi6.ebay.com/aw-cgi/eBayISAPI.dll?ViewSellersOtherItems&userid=rigd…> Joe

23 years, 7 months

OT: dumpster dive and water/mold cleanup

by mythtech＠mac.com

>You can not reuse needles, nor can you sharpen them. With the >acoustic-era machines, needles are used exactly *once*. Play the record, >then pitch the needle. If you reuse needles, you will wreck the records. Glad to know that. I have reused them before, but never more than two or three total playings (they go visibly dull VERY quickly, and unless they look nice and sharp, I didn't dare use them). >Needles are very available from several sources. They are quite >inexpensive (they have to be!). Humm... I've never been able to track them down. But then again, last time I really looked, was pre-internet for me (pre 94/95), so I'll have to do a search now that I have the power of things like Sherlock and Google at my disposal. -chris <http://www.mythtech.net>

23 years, 7 months

cctalk digest, Vol 1 #157 - 46 msgs

by gstreet＠indy.net

Hello All, Back on June 9th of this year (Classic Tech Eletter #11), someone thoughtfully posted the paragraph at the bottom of this message (on this newsgroup). Coincidentally, I had already found the same S-100 computer and I eventually ended up winning the bid (I was the only bidder). I only very recently received this machine (it was slightly damaged in shipping, and it _really_ was filthy! (There was an enormous delay in shipping it to me.) I've got the damage straightened out and I completely disassembled it for cleaning. I just got it back together last night and turned on the switch. I seems to power up and the led's come on (led near the on/off switch and 3 led's on the backplane/motherboard). I talked to one person who said that he thought that he'd had an ISC computer before, but that it wasn't pure S-100. The reason that I bought this machine is that I have some Seattle Computer Products S-100 cards that I really want to get running. They drop in the ISC "S-100" computer _perfectly_, but I have not powered it up with the SCP cards in place. If there's something that's not "pure S-100" about the ISC, I don't want to damage the SCP cards. I just checked the link (below) and it still works. I think the link will disappear in just a few more days (90 days), so I can provide the same pictures to anyone interested after the link disappears. The reason it's taken so long to ask this question is because it took over 2 months for me to actually receive the unit (now the darned link is ready to vanish, probably on Sept 10th). http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2029719366 I cannot find _any_ information about ISC Systems Corp., Spokane, WA. It's an absolutely beautifully crafted unit and from the filthy condition that I received it in--it appears to have been left running for, perhaps, _years_! The seller claimed that he'd removed the existing cards to install in his Altair, but if that's true, someone must have already substituted different cards--in the pictures, you'll notice a bunch of twisted pair and other small gauge wires: these all appear to hook up to what would seem to be "non-standard" S-100 cards, through proprietary connectors. I cannot fathom how the original ISC cards could have been of any use to anyone except a user of this ISC system. It appears that the "non-standard" wires go to things like: keyboard, monitor, a network and LP 1 and LP 2 (LPT 1 & LPT 2??). There is yet another connector that I've no clue as to what it might do. _BUT_, _if_ the box itself conforms to the S-100 standard, and if I can use the SCP cards, all the other wires don't matter, because they won't be connected to anything. I've really taken a liking to this machine--I hope I can use it! Any help would be much appreciated! Thank you, Robert Greenstreet gstreet(a)indy.net > >At 08:33 PM 6/9/02 -0400, you wrote: >CLASSIC TECH ELETTER, Vol. 1, Issue 11 > >It's too bad the seller gutted this ISC Systems S-100 computer. If it >sells close to the opening bid, however, the buyer will get a good deal on >an S-100 starter system. (The seller's right about the system needing a >cleaning. You could knit a sweater with all the lint stuck in the fan >vent.) http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2029719366

23 years, 7 months

Archival storage (was RE: OT: dumpster dive and water/mold cleanu p)

by Robert_Feldman＠jdedwards.com

Look for companies that sell conservation (as in museum storage) supplies. Some that I know of are Gaylord Brothers, Light Impressions, and Hollinger Corp. They sell acid free (buffered) and inert materials for storing documents, photos, textiles, etc. You might also go to a building supply company and get a roll or Tyvek building wrap and make your own sleeves. More or less the same stuff used for 51/4 inch floppy disk sleeves. Only problem might be you would need to use an archival glue or tape to hold the sleeves together. -----Original Message----- From: Tothwolf [mailto:tothwolf@concentric.net] Sent: Wednesday, September 04, 2002 1:57 AM To: cctalk(a)classiccmp.org Subject: RE: OT: dumpster dive and water/mold cleanup On Wed, 4 Sep 2002, Russ Blakeman wrote: > I've made sleeve from the vinyl you can buy in rolls from Walmart for > putting over leaky windows - it's pliable and thinck and similar to the > vinyl that our "forefathers" (and foremothers) used to cover their > furniture with, but thinner. Fold it and then heat seal the top and > bottom edges. I've seen forsted vinyl sleeves lik that in years past > that came with an odd sized box that they could be stored in, sort of an > archival manner of storage. I'd be worried about the PH of such material. Highly acidic (or even highly alkaline) materials are the enemy of items you wish to preserve. -Toth

23 years, 7 months

TI Silent 700's: Update

by doc＠mdrconsult.com

OK. A little looking around has revealed that I have a Model 707 (not the 707/1200, darn it!) and a model 745. I also found out this evening that $friend forgot to give me the shopping bag full of thermal paper.... I've found a lot of links to pages that mention there, but no real documentation. Oh, and one company that will sell a manual for the 745 for $30 plus S&H. Does anyone know where I might find real information? Considering the source, I have every hope that they are fully functional. Doc

23 years, 7 months

OT: dumpster dive and water/mold cleanup

by mythtech＠mac.com

>A reality show? Do you mean non-fantasy? yes, sorry, bad wording on my part. -chris <http://www.mythtech.net>

23 years, 7 months

Semi-OT CP/M question/ feasibility

by archer＠topnow.com

I figure anything CP/M is on-topic, but the hardware I'm talking about would be brand new. :) Are there working examples of CP/M running with just a serial terminal connection and a drive+interface for the sum total I/O? I'm assuming this has been done many times and in theory would be nothing too offbeat? If this exists, it might be useful to study the BIOS to see what's being done there, or perhaps just buy the board and CP/M if by chance something's out there already. Are you giving up anything important with a terminal-based CP/M system vs. one with integral monitor and keyboard -- in other words, cursor positioning and such in applications being less flexible? I'm assuming the answer is "no", no difference because of the way CP/M BDOS calls all go through BIOS? Or is this a "in theory X in practice Y" thing? The reason I'm asking is I've FINALLY -- after about two months of struggle with hardware and coding -- succeeded in getting my IDE interface working. Although it's currently mated to a 6502 board and a 60GB HDD, since it's based on an 82C55, could just as easily be coded to work with a Z80/Z180 system. Okay, I know that porting a BIOS to a new board would be massively non-trivial. I've got a good book "Programmer's Guide to Using and Modifying CP/M" (IIRC) which makes it clear it would be a fairly good prospect to take months to finish, even with good debugging practices. (Although I'm no stranger to coding moderate-sized assembly programs.) On the other hand, I'd motivated by having an SBC that could run any of a number of C, Pascal, Modula 2 or Fortran compilers, along with BASIC, decent editing tools (well, I cut my teeth on PC-DOS Wordstar!), would make such an SBC really quite nifty as a hacking toy. Comments? I'm thinking of using a GAL decoder to map 32Kx8 of "shadow" EEPROM to MEMRDs and the "shadow" RAM to the same address for MEMWRs upon RESET, then copy the "shadow" ROM to RAM on coldboot, and then write to an I/O port to cause the GAL to map only the 128Kx8 SRAM into the machine memory map and jump to 0 to bootstrap up. Not sure if BIOS could use the upper 64K bank for storage in a useful way like disk I/O buffering, but since 128Kx8 SRAMs are cheap and small, and I've got a tubefull, that's what I'd want to use. :) P.S.: I got the 360K floppy to work under Win98, but not XP. I suspect it's just an undocumented "feature" of XP. :)

23 years, 7 months

Intersil Intercept Jr (was Re: Blowing Up Old Computers( early laptops))

by healyzh＠aracnet.com

You might want to check out the following project if you want to build your own small PDP-8. David Conroy has implemented a PDP-8i in an FPGA. http://surfin.spies.com/~dgc/pdp8x/ I might have some info on the 6100, I'll have to try and remember. I've got databooks from them and I believe Harris that list it. Zane > > I think it used unobtainium type RAM and ROM, being > all early Intersil CMOS, so it might be very difficult > to make an "authentic" one today even if you had a > 6100. The 6100 was, given my limited knowledge, harder > to make truly PDP8/e compatible than the later 6120. > I've looked around for a ROM listing or front panel > code for the 6100/Intercept with no luck. > > > > > --- "Peter C. Wallace" <pcw(a)mesanet.com> wrote: > > On Tue, 3 Sep 2002, Ethan Dicks wrote: > > > > > > > > --- Mike <dogas(a)bellsouth.net> wrote: > > > > > > > > I just had to nominate the Intersil Intercept > > Jr. to the early laptop > > > > catagory, Runs on batteries, fits in a lap. > > > > > > > > ;) - Mike: dogas(a)bellsouth.net > > > > > > Are there plans out there anywhere? I doubt I'll > > ever run across > > > a real one. They looked kinda cool back when I > > was a kid, but at > > > the time, I didn't understand what it meant to be > > PDP-8-instruction- > > > set compatible (i.e., the implications of it, not > > the literal sense > > > of "compatible"). > > > > > > It had, IIRC, some toggle switches, LEDs, and 4KW > > of SRAM, right? > > > > > > -ethan > > > > The intercept had those, the Intercept Jr only had a > > keypad and numeric LED > > display. It only 256 or 1K (12 bit) words of RAM > > ISTR > > > > > > > > > > > > > > > > > > > > > > > > > __________________________________________________ > > > Do You Yahoo!? > > > Yahoo! Finance - Get real-time stock quotes > > > http://finance.yahoo.com > > > > > > > Peter Wallace > > > > > __________________________________________________ > Do You Yahoo!? > Yahoo! Finance - Get real-time stock quotes > http://finance.yahoo.com >

23 years, 7 months

Intersil Intercept Jr

by mranalog＠attbi.com

Loboyko Steve wrote: > I think it used unobtainium type RAM and ROM, being > all early Intersil CMOS, so it might be very difficult > to make an "authentic" one today even if you had a > 6100. On mine, the motherboard uses a IM6312 for the "microinterpreter" (dated mid 1977). And I assume that the three IM6561s are ram chips (dated early 1978). The rest consists of: 1 - IM6100 2 - CD4511 1 - CD4042 1 - F4075 2 - 74C74 1 - F40175 1 - CD4025 2 - F40098 1 - 74C42 1 - CD4069 1 - CD4011 1 - F4001 1 - 1K Beckman DIP Resistor pak 1 - 10K Beckman DIP Resistor pak 8 - FND 367 7 segment red LED displays 1 - 2.4576 MHz crystal 1 - 12 key keypad 4 - 2N2222 transistors 3 - 44 pin circuit edge connectors 1 - battery holder to hold 4 D cell batteries in series and a few resistors, diodes, capactors and a switch Now the "6951c-M1KX12" plug-in battery-backuped ram board has 12 IM6518s. > I've looked around for a ROM listing or front panel > code for the 6100/Intercept with no luck. Somewhere here I have the users manual and I am almost certain that there is a listing of the microinterpreter in the manual. Regards, --Doug ========================================= Doug Coward @ home in Poulsbo, WA Analog Computer Online Museum and History Center http://dcoward.best.vwh.net/analog Analogrechner, calculateur analogique, calcolatore analogico, analoogrekenaar, komputer analogowy, analog bilgisayar, kampiutere ghiyasi, analoge computer. =========================================

23 years, 7 months

OT: dumpster dive and water/mold cleanup

by mythtech＠mac.com

>Home recorded?? I didn't know that was possible! The only time I ever actually saw a record recorder was on an episode of the Honeymooners. Ralph recorded a message for Alice on his record player. He made a comment about needing a blank record, and then spoke into what looked like a mini horn speaker. I assumed that since the Honeymooners was a "reality" show, that the device actually existed (and since I have heard reference to such a thing elsewhere). Anyone know what material the blank records used? I would think ceramic would be too hard, and even vinyl records seem like the material would be too stiff to get a good recording. -chris <http://www.mythtech.net>

23 years, 7 months

OT: dumpster dive and water/mold cleanup

by mythtech＠mac.com

>I've never heard of ceramic records. Is this different than the old >bakelite reocrds? Don't know. I'm not a record expert, so maybe they aren't ceramic. I was told that was the material, and I know they are a hard, brittle, fragile glass or clay like substance (from the one that I broke). These are 1910-1920 era records (based on the fact that they carry the Victrola name, and IIRC, my Victrola has a 1913 date on the back) -chris <http://www.mythtech.net>

23 years, 7 months

some observations

by ghldbrd＠ccp.com

It has been some time since the OT rants took up the majority of e-mails, and now we get the spammers in the list . . . . I've noticed that I get upwards of 100 e-mails a day from you guys. Much of it gets disposed of if I have no interest, but on occasion I pick up some nice tidbits of information for future reference. What I've seen is multiple listings from the same person, who writes and sends, writes and sends, a sentence or two at a time. Sometimes I think one would be better off if one just sat back and composed a single post with all the details in one fell swoop. I'm sorry if this may have offended someone; it was not intended to. Just some biased observations and a suggestion to help cut down on some of the unneeded traffic. You all have a wonderful treasure of knowlege out there, just make the nuggets a bit bigger . . . please???? Gary Hildebrand St. Joseph, MO

23 years, 7 months

OT: dumpster dive and water/mold cleanup

by mythtech＠mac.com

>Are you thinking of 45s? I've never heard of storing fragile 78s in wire >racks... I have some ceramic 78's stored in wire racks. They go to my Victrola. I confiscated them that way from my father (when I repaired the Victrola many years ago), but I remember growing up they were always stored that way in the basement. I can't say however if my father put them that way, or if he got them that way from my grandmother when he confiscated the Victrola from her (with intention of repairing it, but he didn't, instead it sat in the foyer for 15 years before I decided to see if I could get it going). I haven't dared change their storage method simply because I am afraid of breaking them, and I figure if they have made it about 30 years this way, they should be able to make it another 30. -chris <http://www.mythtech.net>

23 years, 7 months

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