test-drb June 2009

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Apple Preliminary Macintosh Business Plan and IPO Memorandum Now Accessible on CHM Website

by christian_liendo＠yahoo.com

http://www.marketwire.com/press-release/Computer-History-Museum-998047.html

14 years, 11 months

cctalk Digest, Vol 70, Issue 3

by bqt＠softjar.se

On Mon, Jun 1, 2009 at 3:23 AM, Josh Dersch <derschjo at mail.msu.edu> wrote: > Here's a question: The M9300 Ian lent me has three jumpers, labeled as > follows: > > W1 : "Remove jumper for beginning of non processor bus termination" > W2 : "Remove jumper for end of bus termination" > W3 : "Remove jumper for end of processor bus termination" > > Currently, W1 is installed, W2 and W3 are removed. Is this correct? Don't know for sure. Look in a manual? :-) > I'm curious what is meant by "processor bus" vs. just "bus" in this context > -- can someone fill me in? Some CPUs (can't remember about the 11/40 anymore) use an M930 (or M9300) at the beginning of the CPU as well as at the end of the Unibus. The 11/70 for example. Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

14 years, 11 months

Further 11/40 unibus questions...

by derschjo＠mail.msu.edu

Hi all -- Still having trouble with my 11/40, though it's getting closer. Currently the issue is: Without a unibus terminator installed, the machine seems to function in that I can use the front panel, toggle in and run short programs, etc. With a unibus terminator installed, the front panel is _almost_ unresponsive -- I cannot examine or deposit memory or load addresses. Toggling "Run" causes a brief flicker of activity (the "Run," "Proc," and "Bus" lights come on, the data lights flicker, and then they turn off, and the "Console" light comes back on.). Ian lent me his M9300 terminator, which caused no changes in behavior. So at least I can (probably) rule out a faulty terminator. I've verified that grant continuity cards (the tiny annoying ones) are installed in slot D of all empty Unibus slots, and that the NPG jumper is installed in all slots (since I currently have no DMA devices installed). Question: Should the NPG jumper _also_ be installed in the one SPC Unibus slot on the processor backplane? (I have a console SLU installed there currently.) This does not currently appear to be present. Before I break out the logic analyzer this evening and start debugging Unibus termination signals, I just wanted to make sure my current configuration seems sane. The boards are installed as follows: Rear: Slot 4 : Empty M9300 Slot 3 : Empty Slot 2 : M7891 Slot 1 : Empty | M981 --- Slot 9 : M7856 | M981 Slots 1-8: <Basic 11/40 CPU set + MMU> Front: (As mentioned before, all "empty" unibus slots have a unibus grant card + NPG jumper installed, Slot 3 has the NPG jumper installed.) Thanks once again, Josh

14 years, 11 months

How big of Sin? - Hacking up a IBM PC Jr.

by chrism3667＠yahoo.com

OI why does hacking on a peanut deserve a one way ticket to Hell, and not rather just purgatory??? I'm not Catholic and don't believe that, but that's besides the point. Answer me this, just how much damage will you do to the unit? If you're just going to relocate the stantions to screw the new mobo into, that hardly amounts to an egregious offense IMHO, There's only one drive bay, and lt hard drives are so cheap, so the actual destruction should be minimal I guess. Just as long as you're not looking to run a server from it... You're not going to Hell. I'm just not allowing you to spend any quality time w/any of my JR's...

14 years, 11 months

Compaq SLT/286

by aceevans_95＠hotmail.com

DearSir Please can you tell me where the bios battery is situated as I cannot find it, also its voltage. Thankyou for any help. Yours faithfully. Arthur Evans. _________________________________________________________________ Share your photos with Windows Live Photos ? Free. http://clk.atdmt.com/UKM/go/134665338/direct/01/

14 years, 11 months

Interfacing a 68000 to RAM

by trag＠io.com

> > Date: Mon, 1 Jun 2009 06:50:55 -0700 > From: dwight elvey <dkelvey at hotmail.com> > Does anyone have a nice pointer to a diagram > of how the 68K bus is to be connected to RAM? > I not that familiar with all the various signals. > I've spent some time searching but maybe don't > have the right search string. > Dwight Do you want to interface with SRAM or DRAM? DRAM typically has multiplexed addresses (address sent in two sequential chunks on same wires) and so you're going to need some kind of memory controller to handle that plus refresh for the DRAM. If you're trying to interface with SRAM that typically just takes a straight address and does not require refresh, so it's much easier. I've only done it on the 68HC11 so your app may be different, but it is usually discussed in the part's User's Guide, so you should download that from Motorola if you have not already. Oh, and check for any relevant white papers on the topic as well (AKA Application Notes). Jeff Walther

14 years, 11 months

plain perfboard

by tshoppa＠wmata.com

On Jun 1, 2009, at 2:53 AM, David Griffith wrote: > It seemed to me that Radio Shack stopped selling plain perfboard a > year or two ago. Yet a couple days ago, I found lots of it at the one > a few blocks from my house. Anyone else know anything about this? > Solder-ringed perfboard is good for stuff, but I find plain perfboard > nice for building up stuff that's not necessarily a circuit. A couple years ago I gave up on perfboard for prototyping and now largely do prototyping "dead bug" on unetched printed circuit board. Or, sometimes courtesy of a big knife, unetched PCB with busses cut into it. Google "dead bug" prototyping for some good examples. It is in every way superior to using perfboard. Even what I once thought were problem cases are not actually problems: dual-row headers work great with dead bug, as long as most or all the pins on one side are at ground (long the convention among any rational uses.) Tim.

14 years, 11 months

Mystery object...

by roger.holmes＠microspot.co.uk

> > > From: "Rod Smallwood" <rodsmallwood at btconnect.com> > > > It looks like a 1940's tele-printer or fax station. Could what > appears to be > a train actually be a DC3 of Northwest Airlines? If it's a train > then it's > not a UK one. Wrong sort of windows and no signs that big on any UK > train. Yes, and the bulging thing behind it, which looks a bit like a car, is the tip of the right wing. The left wing appears to be either under this room or has not been fitted, assuming the picture was taken at an aircraft factory. Or a NOR gate :-) Roger Holmes.

14 years, 11 months

IBM 029 Keypunch has arrived

by ed＠ed-thelen.org

> > Message: 2 > Date: Mon, 25 May 2009 12:18:39 +0100 > From: Roger Holmes <roger.holmes at microspot.co.uk> > Subject: IBM 029 Keypunch has arrived Congratulations on your purchase of your new IBM 026 keypunch ;-)) Our IBM 1401 restoration operation has 4 IBM 026 keypunches restored to full operation Several notes: a) None of ours have a ferroresonant regulator. They are all as wired in http://www.ed-thelen.org/1401Project/026-KeypunchSchematic.pdf general area http://www.ed-thelen.org/1401Project/1401RestorationPage.html#Unit-Record-E… b) One or more of the electrolytic capacitors may need re-forming A symptom of the need is the immediate blowing of fuses when powering up. My favorite method is to place a 4 watt 115 volt tungsten bulb in series with the charging circuit to the capacitor. This reduces current and local heating in the capacitor to acceptable values while the electro-chemistry is taking place. http://ed-thelen.org/1401Project/Sched2005Jan.html see Wednesday January 19th c) Fortunately, 25L6 tubes are available on e-bay ;-)) d) Two of the keypunches had an open hold coil in one of the relays. We couldn't find: - a replacement - a volunteer to rewind to solenoid so did a work-around including a 7 watt lamp as a current limiter. http://ed-thelen.org/1401Project/Sched2006December.html#13 e) Strong suggestion: Unless you absolutely have to, don't mess with the print section. Getting it lined up again will drive you nutz. One of ours had run out of lubrication and the print wires would not move correctly - Bob Erickson, who fixes analog watches for fun, had a long "interesting" battle !! f) We "re-ink" our own ribbons - by re-oiling them, as there still seems to be enough "black" in 'em. g) We have two people who have done most of the restoration on the four keypunches - Bob Erickson http://ed-thelen.org/1401Project/TeamBios.html#Erickson Joe Preston http://ed-thelen.org/1401Project/TeamBios.html#Preston They fixed 'em when they were working for IBM, Oh so many years ago :-)) Please regard us a resourse of knowledge if you need help. ... > > Looking through the parts list there is something I'd like the list's > opinion on. The diagram shows a transformer but the list says > "REGULATOR ASM, FERRORESONANT-60CPS 120VA" and a similar option for > 50Hz which of course I don't have. What are these for? Might they work > at the wrong frequency? Will they be damaged or just not work? This is > part of a 48v DC supply. Should I build a simple 48V supply myself or > even see what I can find in my verifier spares? The ferroresonant question has been correctly answered in another e-mail, Our IBM 1401s are "full of 'em" ;-)) I did some experiments on one, they are surprisingly "stiff", ie good. Ours are rated at 133 volts nominal output Into a light load, the output stayed within 5% with inputs ranging from 85 volts to 220 volts :-)) According to "Solar" documentation - the output voltage will vary 1% for each 1% deviation of input frequency. Good Fortune Ed Thelen

14 years, 11 months

Some blinkenlights for entertainment...

by mross666＠hotmail.com

Here you go: http://www.youtube.com/watch?v=CBtXLZcY_bM Makes a change from pdp... :-) William Donzelli: ping! Please email me at mike at corestore dot org - I may just have something for you... Mike http://www.corestore.org > From: cctech-request at classiccmp.org > Subject: cctech Digest, Vol 69, Issue 48 > To: cctech at classiccmp.org > Date: Fri, 29 May 2009 12:00:01 -0500 > > Send cctech mailing list submissions to > cctech at classiccmp.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://www.classiccmp.org/mailman/listinfo/cctech > or, via email, send a message with subject or body 'help' to > cctech-request at classiccmp.org > > You can reach the person managing the list at > cctech-owner at classiccmp.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of cctech digest..." > > > Today's Topics: > > 1. Re: 1964 Antique MODEM Live Demo (Chuck Guzis) > 2. Re: VT-6 kit (was Re: Making vintage computers) (John Honniball) > 3. EPROM for Linger 6502 Terminal (M H Stein) > 4. Re: 1964 Antique MODEM Live Demo (David Griffith) > 5. Re: VT-6 kit (was Re: Making vintage computers) (Alexandre Souza) > 6. Re: VT-6 kit (was Re: Making vintage computers) (Alexandre Souza) > 7. Re: VT-6 kit (was Re: Making vintage computers) (Gene Buckle) > 8. Re: VT-6 kit (was Re: Making vintage computers) (Alexandre Souza) > 9. Re: VT-6 kit (was Re: Making vintage computers) (Bob Bradlee) > 10. Re: receptacles (was IBM 029 Keypunch has arrived) (Pete Turnbull) > 11. Re: 1964 Antique MODEM Live Demo (Brent Hilpert) > 12. Re: 1964 Antique MODEM Live Demo (Dave McGuire) > 13. Re: 1964 Antique MODEM Live Demo (Chuck Guzis) > 14. Re: 1964 Antique MODEM Live Demo (Chuck Guzis) > 15. Re: 1964 Antique MODEM Live Demo (John Foust) > 16. Re: 1964 Antique MODEM Live Demo (Dave McGuire) > 17. Re: 1964 Antique MODEM Live Demo (William Donzelli) > 18. Re: 1964 Antique MODEM Live Demo (Dave McGuire) > 19. Re: 1964 Antique MODEM Live Demo (Chuck Guzis) > 20. Re: VT-6 kit (was Re: Making vintage computers) (Gene Buckle) > 21. RE: An ebay bargain (I hope!) (N0body H0me) > 22. Re: 1964 Antique MODEM Live Demo (Warren Wolfe) > 23. Re: VT-6 kit (Ethan Dicks) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Thu, 28 May 2009 13:38:43 -0700 > From: "Chuck Guzis" <cclist at sydex.com> > Subject: Re: 1964 Antique MODEM Live Demo > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Message-ID: <4A1E93E3.24953.348876B3 at cclist.sydex.com> > Content-Type: text/plain; charset=US-ASCII > > On 28 May 2009 at 15:56, Golan Klinger wrote: > > > Disclaimer: I wouldn't normally post this sort of thing but I'm > > confident it will be of interest to more than a few on this list. > > > > "1964 Antique MODEM Live Demo" > > <http://www.youtube.com/watch?v=X9dpXHnJXaE> > > This brought up the question of "whatever happened to all of the gray > Bell Dataphones? (e.g. 401E). They used to be as common as > cockroaches. > > I haven't seen one in many years. > > --Chuck > > > > ------------------------------ > > Message: 2 > Date: Thu, 28 May 2009 21:55:07 +0100 > From: John Honniball <coredump at gifford.co.uk> > Subject: Re: VT-6 kit (was Re: Making vintage computers) > To: General Discussion: On-Topic Posts Only <cctech at classiccmp.org> > Message-ID: <4A1EFA2B.3000606 at gifford.co.uk> > Content-Type: text/plain; charset=us-ascii; format=flowed > > Gene Buckle wrote: > > I'd love to find a 7" color VGA display. Even a 7" LCD panel with a 4:3 > > aspect ratio would work. > > I have an Olivetti VGA colour monitor with a 9-inch screen. > If you want to find one like it, the model number is: > > CD.9.A./2709 > > Hope that helps! > > -- > John Honniball > coredump at gifford.co.uk > > > ------------------------------ > > Message: 3 > Date: Thu, 28 May 2009 14:47:23 -0400 > From: M H Stein <dm561 at torfree.net> > Subject: EPROM for Linger 6502 Terminal > To: "'cctalk at classiccmp.org'" <cctalk at classiccmp.org> > Message-ID: <01C9DFA3.4D5A5A00 at MSE_D03> > Content-Type: text/plain; charset="us-ascii" > > Speaking of terminal kits, by any chance does anyone out there have a > Linger 6502 terminal kit? I'm looking for an image of the the AT keyboard > version of the EPROM... > > mike > **************************** > ---------------Original Message(s) > Date: Wed, 27 May 2009 22:00:57 -0400 > From: Ethan Dicks <ethan.dicks at gmail.com> > Subject: VT-6 kit (was Re: Making vintage computers) > > On Wed, May 27, 2009 at 9:53 PM, bfranchuk at jetnet.ab.ca > <bfranchuk at jetnet.ab.ca> wrote: > > Now back to putting together my SPARE TIME GIZMOS dumb terminal once I print > > out the online PDF manual. > > I just got my VT-6 partial kit today - time for me to start assembling it! > > -ethan > > > > ------------------------------ > > Message: 4 > Date: Thu, 28 May 2009 14:18:19 -0700 (PDT) > From: David Griffith <dgriffi at cs.csubak.edu> > Subject: Re: 1964 Antique MODEM Live Demo > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Message-ID: > <alpine.DEB.1.10.0905281414150.11441 at sleipnir.cs.csubak.edu> > Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed > > On Thu, 28 May 2009, Golan Klinger wrote: > > > Disclaimer: I wouldn't normally post this sort of thing but I'm > > confident it will be of interest to more than a few on this list. > > > > "1964 Antique MODEM Live Demo" > > <http://www.youtube.com/watch?v=X9dpXHnJXaE> > > It certainly is of interest. I'd like to get one of those for myself. It > shouldn't be too terribly hard to homebrew one of these things into a > shoeshine box, right? > > -- > David Griffith > dgriffi at cs.csubak.edu > > A: Because it fouls the order in which people normally read text. > Q: Why is top-posting such a bad thing? > A: Top-posting. > Q: What is the most annoying thing in e-mail? > > > ------------------------------ > > Message: 5 > Date: Thu, 28 May 2009 18:24:35 -0300 > From: "Alexandre Souza" <alexandre-listas at e-secure.com.br> > Subject: Re: VT-6 kit (was Re: Making vintage computers) > To: "General Discussion: On-Topic Posts Only" <cctech at classiccmp.org> > Message-ID: <0cd101c9dfda$eaec2960$35c219bb at desktaba> > Content-Type: text/plain; format=flowed; charset="iso-8859-1"; > reply-type=original > > >One problem is that the video circuit for compact Macs is bizarre. > >The display circuit was optimized for square pixels at 72 dpi on the > >tube. Here's the stats of the Mac video circuit I was able to dredge > >up... > > Do what I did. Subistitute the entire analog board for a small (9") vga > mono monitor :o) > > All (or most) picture tubes are compatible. I have an old mac 128 who > came to me without the analog board. When it happened, it was hard (and > expensive) as hell to put my hands on an analog board. Since I wanted that > mac to play, I gutted an old 9" mono vga monitor I had and installed > everything but the picture tube on the mac. It is my "secondary PC monitor" > up to today, running windows and like :D > > If you want a colour monitor, install everything - incluiding the > picture tube. > > >As for the keyboard, the original Mac keyboard (128K and 512K) lacks > >arrow keys, a control key, function keys and a keypad. The Mac Plus > > Why would I use the (arrrrggghhhh) original mac keyboard? The newer mac > keyboards are nice, and you can always build an ADB -> PS/2 adapter. Or mod > the source of the VT-5 to use an ADB keyboard :) I took a (very) fast look > on the schematics, seems that the keyboard decoder is very simple. > > Or, do like me, use a PC keyboard :o) > > >EDT user. I don't know anything about Mac keyboard protocols or > >signaling method, but with the modular-jack keyboards (pre-ADB), it's > >probably similar enough to what everyone else did (power, ground, > >either data+clock or bi-directional data over the 4 wires) that it > >shouldn't be too hard to reverse-engineer. > > ADB is not hard, it is well documented in apple's site! > > >If you could find an old 9" mono VGA monitor, that might be easy to > >physically adapt to an old Mac case, but I don't remember those being > >too common, even back when they were making them (since they were > >really only popular with hardcore DOS users). > > you can use a 12" monitor circuit with a 9" tube. Did I made it easier > for you? :o) > > I have some photos of mine, I can send to you, my site is offline > > > > > ------------------------------ > > Message: 6 > Date: Thu, 28 May 2009 18:25:52 -0300 > From: "Alexandre Souza" <alexandre-listas at e-secure.com.br> > Subject: Re: VT-6 kit (was Re: Making vintage computers) > To: "General Discussion: On-Topic Posts Only" <cctech at classiccmp.org> > Message-ID: <0d1d01c9dfdb$39656cf0$35c219bb at desktaba> > Content-Type: text/plain; format=flowed; charset="iso-8859-1"; > reply-type=original > > > The problem, of course, is finding terminal emulation software that'll > > emulate weird terminal types (non VT100/ANSI emulation). That's what I > > - Telix? > - Terminate? (EXCELLENT!!!!!!) > - Telemate? > - Procomm Plus? > > > > ------------------------------ > > Message: 7 > Date: Thu, 28 May 2009 14:48:27 -0700 (PDT) > From: Gene Buckle <geneb at deltasoft.com> > Subject: Re: VT-6 kit (was Re: Making vintage computers) > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Message-ID: <alpine.LFD.1.10.0905281446390.8841 at grumble.deltasoft.com> > Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed > > On Thu, 28 May 2009, John Honniball wrote: > > > Gene Buckle wrote: > >> I'd love to find a 7" color VGA display. Even a 7" LCD panel with a 4:3 > >> aspect ratio would work. > > > > I have an Olivetti VGA colour monitor with a 9-inch screen. > > If you want to find one like it, the model number is: > > > John, thanks for the tip. Unfortunately, a 7" diagonal monitor is the > largest I can use. It's a replacement for the 1:1 aspect ratio screen > that was originally installed in the MPCD of the F-15C I'm rebuilding into > a simulator. I've got a 7" monochrome display shoe-horned into the > chassis now, but it really should be a color display. > > g. > > > -- > Proud owner of F-15C 80-0007 > http://www.f15sim.com - The only one of its kind. > > ScarletDME - The red hot Data Management Environment > A Multi-Value database for the masses, not the classes. > http://www.scarletdme.org - Get it _today_! > > > ------------------------------ > > Message: 8 > Date: Thu, 28 May 2009 18:59:17 -0300 > From: "Alexandre Souza" <alexandre-listas at e-secure.com.br> > Subject: Re: VT-6 kit (was Re: Making vintage computers) > To: "General Discussion: On-Topic Posts Only" <cctech at classiccmp.org> > Message-ID: <0d8601c9dfdf$9af81360$35c219bb at desktaba> > Content-Type: text/plain; format=flowed; charset="iso-8859-1"; > reply-type=original > > > you can use a 12" monitor circuit with a 9" tube. Did I made it easier for > > you? :o) > >I can understand how that can be so, but I didn't assume it was true. > >I certainly have never tried it (though now I might). > > Most of mono monitors are the same. Never had a different tube that I > couldn't exchange between boards (but you have to use the same yoke coil > from the board - you just swap the glass tube). I used tubes from 5" to 12" > in the same board. All of then worked the same, with retouches on the pots > (width, height, bright, so on) > > > > ------------------------------ > > Message: 9 > Date: Thu, 28 May 2009 18:12:33 -0400 > From: "Bob Bradlee" <caveguy at sbcglobal.net> > Subject: Re: VT-6 kit (was Re: Making vintage computers) > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Message-ID: <200905282212.n4SMCMco081219 at keith.ezwind.net> > Content-Type: text/plain; charset="us-ascii" > > On Thu, 28 May 2009 14:48:27 -0700 (PDT), Gene Buckle wrote: > > >On Thu, 28 May 2009, John Honniball wrote: > > >> Gene Buckle wrote: > >>> I'd love to find a 7" color VGA display. Even a 7" LCD panel with a 4:3 > >>> aspect ratio would work. > >> > >> I have an Olivetti VGA colour monitor with a 9-inch screen. > >> If you want to find one like it, the model number is: > >> > >John, thanks for the tip. Unfortunately, a 7" diagonal monitor is the > >largest I can use. It's a replacement for the 1:1 aspect ratio screen > >that was originally installed in the MPCD of the F-15C I'm rebuilding into > >a simulator. I've got a 7" monochrome display shoe-horned into the > >chassis now, but it really should be a color display. > > >g. > > Google 7 inch color display and you will find a bunch of choices. > assuming LCT is close enough. > 7 color CRT are a bit harder to find but theye are around. > > an ebay search of 7 color tv came up with a few choices. > > Auto Vackup camera with 7 display > http://www.i4u.com/article6741.html > > Door camera with 7 color display > http://www.alibaba.com/product-gs/211479480/Color_Video_Door_Phone_7_inch.h… > > > http://www.diytrade.com/china/4/products/4802363/7inch_in_VGA_LCD_PC_AV.html > > ASUS Eee PC 4G (7-Inch Display > http://www.amazon.com/7-Inch-Display-Mobile-Processor-Preloaded/dp/B000YEMK… > > Bob > > > > > > ------------------------------ > > Message: 10 > Date: Thu, 28 May 2009 22:59:01 +0100 > From: Pete Turnbull <pete at dunnington.plus.com> > Subject: Re: receptacles (was IBM 029 Keypunch has arrived) > To: General Discussion: On-Topic and Off-Topic Posts > <cctalk at classiccmp.org> > Message-ID: <4A1F0925.9020505 at dunnington.plus.com> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > On 28/05/2009 19:45, Tony Duell wrote: > > > Indeed. I have a cable with a suitable plug on one end to fit the > > transformer (It's normally called a 'BS4343 plug' over here after the > > British Standard that refers to it , there is a CEN number, but I can't > > rememebr it :-)) > > IEC 309, or more correctly (and up to date) IEC 60309 or EN 60309. > Often called "Commando" plugs though that's a trademark of a particular > manufacturer. That range covers 240V as well as 110V and covers > three-phase versions as well. > > -- > Pete Peter Turnbull > Network Manager > University of York > > > ------------------------------ > > Message: 11 > Date: Thu, 28 May 2009 16:03:47 -0700 > From: Brent Hilpert <hilpert at cs.ubc.ca> > Subject: Re: 1964 Antique MODEM Live Demo > To: General at invalid.domain, "Discussion at invalid.domain":On-Topic and > Off-Topic Posts <cctalk at classiccmp.org> > Message-ID: <4A1F1852.355206C9 at cs.ubc.ca> > Content-Type: text/plain; charset=us-ascii > > David Griffith wrote: > > > > On Thu, 28 May 2009, Golan Klinger wrote: > > > > > Disclaimer: I wouldn't normally post this sort of thing but I'm > > > confident it will be of interest to more than a few on this list. > > > > > > "1964 Antique MODEM Live Demo" > > > <http://www.youtube.com/watch?v=X9dpXHnJXaE> > > > > It certainly is of interest. I'd like to get one of those for myself. It > > shouldn't be too terribly hard to homebrew one of these things into a > > shoeshine box, right? > > I have one of the same model as shown in the video (Livermore Data Systems > model A). Component date codes in mine are 1969/70, the 1964 suggestion may be > a little early, but I guess it depends on how long they were producing them > for. Very elaborate woodwork for the task (solid teak or walnut with dovetail > joints) but I suppose the wood case had some acoustic advantages. 13 transistors. > > (pedantic: His technical description was a little off, it's FSK, not an > 'interrupted' tone.) > > Does anyone know if the frequencies for the 110 and 300 baud modem standards > were the same or different? > > > ------------------------------ > > Message: 12 > Date: Thu, 28 May 2009 19:10:56 -0400 > From: Dave McGuire <mcguire at neurotica.com> > Subject: Re: 1964 Antique MODEM Live Demo > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Message-ID: <49D46435-DFCF-45CE-8D53-6ED0F8960961 at neurotica.com> > Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed > > On May 28, 2009, at 7:04 PM, Eric Smith wrote: > >> It certainly is of interest. I'd like to get one of those for > >> myself. It shouldn't be too terribly hard to homebrew one of > >> these things into a shoeshine box, right? > > "Pennywhistle", Popular Electronics, March 1976. > > > > If you don't really need a design that old, you might be able to > > find a TMS99532 or Am7910 FSK modem chip. > > An eBay seller has a number of TMS99532s available at $2.75/ea, > item # 110376664450. > > -Dave > > -- > Dave McGuire > Port Charlotte, FL > > > > ------------------------------ > > Message: 13 > Date: Thu, 28 May 2009 16:56:03 -0700 > From: "Chuck Guzis" <cclist at sydex.com> > Subject: Re: 1964 Antique MODEM Live Demo > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Message-ID: <4A1EC223.26567.353D6FFC at cclist.sydex.com> > Content-Type: text/plain; charset=US-ASCII > > On 28 May 2009 at 16:29, Fred Cisin wrote: > > > We saw him dial, and put the handset into the cradle, but he did NOT > > shut the lid. The notch is there for a reason. If you don't close > > the lid, ambient noise, such as a nearby printer or 026, can be a > > problem. > > Yeah Fred, but a modern laptop isn't nearly as noisy as an ASR33! I > don't recall Silent 700 terminals having any such lid on the acoustic > coupler. > > --Chuck > > > > ------------------------------ > > Message: 14 > Date: Thu, 28 May 2009 18:00:18 -0700 > From: "Chuck Guzis" <cclist at sydex.com> > Subject: Re: 1964 Antique MODEM Live Demo > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Message-ID: <4A1ED132.7480.35780B86 at cclist.sydex.com> > Content-Type: text/plain; charset=US-ASCII > > On 28 May 2009 at 19:10, Dave McGuire wrote: > > > > If you don't really need a design that old, you might be able to > > > find a TMS99532 or Am7910 FSK modem chip. > > > > An eBay seller has a number of TMS99532s available at $2.75/ea, > > item # 110376664450. > > I don't recall what the Pennywhistle used. Was it NE567s or am I > thinking of another hobbyist modem design? > > --Chuck > > > > > ------------------------------ > > Message: 15 > Date: Thu, 28 May 2009 19:51:35 -0500 > From: John Foust <jfoust at threedee.com> > Subject: Re: 1964 Antique MODEM Live Demo > To: <cctalk at classiccmp.org> > Message-ID: <6.2.3.4.2.20090528194927.08c868f0 at mail.threedee.com> > Content-Type: text/plain; charset="us-ascii" > > At 03:38 PM 5/28/2009, Chuck Guzis wrote: > >On 28 May 2009 at 15:56, Golan Klinger wrote: > >> "1964 Antique MODEM Live Demo" > >> <http://www.youtube.com/watch?v=X9dpXHnJXaE> > > > >This brought up the question of "whatever happened to all of the gray > >Bell Dataphones? (e.g. 401E). They used to be as common as > >cockroaches. I haven't seen one in many years. > > A while back I mentioned my Anderson Jacobson ADC 300: > > http://www.classiccmp.org/pipermail/cctalk/2000-October/159208.html > > It looks like: > > http://www.computerhistory.org/collections/accession/102635865 > > - John > > > > ------------------------------ > > Message: 16 > Date: Thu, 28 May 2009 21:15:00 -0400 > From: Dave McGuire <mcguire at neurotica.com> > Subject: Re: 1964 Antique MODEM Live Demo > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Message-ID: <FCABA958-F8CF-4CFC-959D-01EF6FC92ADE at neurotica.com> > Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed > > On May 28, 2009, at 9:00 PM, Chuck Guzis wrote: > >>> If you don't really need a design that old, you might be able to > >>> find a TMS99532 or Am7910 FSK modem chip. > >> > >> An eBay seller has a number of TMS99532s available at $2.75/ea, > >> item # 110376664450. > > > > I don't recall what the Pennywhistle used. Was it NE567s or am I > > thinking of another hobbyist modem design? > > I honestly don't recall, but I seem to recall their having been > more components than a TMS99532-based design would require. > > -Dave > > -- > Dave McGuire > Port Charlotte, FL > > > > ------------------------------ > > Message: 17 > Date: Thu, 28 May 2009 21:26:39 -0400 > From: William Donzelli <wdonzelli at gmail.com> > Subject: Re: 1964 Antique MODEM Live Demo > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Message-ID: > <e1d20d630905281826i19858efj140d9ce4e39a11cb at mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > > ?I honestly don't recall, but I seem to recall their having been more > > components than a TMS99532-based design would require. > > It was a Motorola CMOS part - 14412? > > -- > Will > > > ------------------------------ > > Message: 18 > Date: Thu, 28 May 2009 21:33:23 -0400 > From: Dave McGuire <mcguire at neurotica.com> > Subject: Re: 1964 Antique MODEM Live Demo > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Message-ID: <64959316-DD3D-402B-8B8E-2248580C07E4 at neurotica.com> > Content-Type: text/plain; charset=US-ASCII; format=flowed > > On May 28, 2009, at 9:26 PM, William Donzelli wrote: > >> I honestly don't recall, but I seem to recall their having been more > >> components than a TMS99532-based design would require. > > > > It was a Motorola CMOS part - 14412? > > Wasn't that a baud rate generator? Or is that the 14411? > > -Dave > > -- > Dave McGuire > Port Charlotte, FL > > > > ------------------------------ > > Message: 19 > Date: Thu, 28 May 2009 18:47:22 -0700 > From: "Chuck Guzis" <cclist at sydex.com> > Subject: Re: 1964 Antique MODEM Live Demo > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Message-ID: <4A1EDC3A.11304.35A35271 at cclist.sydex.com> > Content-Type: text/plain; charset=US-ASCII > > On 28 May 2009 at 21:33, Dave McGuire wrote: > > > On May 28, 2009, at 9:26 PM, William Donzelli wrote: > > >> I honestly don't recall, but I seem to recall their having been > > >> more > > >> components than a TMS99532-based design would require. > > > > > > It was a Motorola CMOS part - 14412? > > > > Wasn't that a baud rate generator? Or is that the 14411? > > I do recall that a friend built the PW and reported to me that he > thought it was the worst modem he'd ever used. I was happily using > my scavenged-from-a-TI-terminal modem. I mounted it with a small > power supply in one of those hammertone Bud aluminum utility boxes-- > and used a 4-conductor "Jones plug" for the signal lines. > > --Chuck > > > > > ------------------------------ > > Message: 20 > Date: Thu, 28 May 2009 19:08:32 -0700 (PDT) > From: Gene Buckle <geneb at deltasoft.com> > Subject: Re: VT-6 kit (was Re: Making vintage computers) > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Message-ID: > <alpine.LFD.1.10.0905281859530.10323 at grumble.deltasoft.com> > Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed > > On Thu, 28 May 2009, Bob Bradlee wrote: > > > > > Google 7 inch color display and you will find a bunch of choices. > > assuming LCT is close enough. > > 7 color CRT are a bit harder to find but theye are around. > > > I've NEVER seen a 7" color VGA display. I'd hoped I was just looking in > the wrong places. > > > an ebay search of 7 color tv came up with a few choices. > > > Actually, no choices. LCDs are by and large formatted for a 16:9 aspect > ratio. This means that a display that's the correct width will be too > narrow to properly fill the vertical space in the MPCD bezel. The > original tube is still available, but the supplier wants $5000.00 for it. > It's a 1:1 aspect ratio tube with a resolution of 512x512. > > g. > > -- > Proud owner of F-15C 80-0007 > http://www.f15sim.com - The only one of its kind. > > ScarletDME - The red hot Data Management Environment > A Multi-Value database for the masses, not the classes. > http://www.scarletdme.org - Get it _today_! > > > ------------------------------ > > Message: 21 > Date: Thu, 28 May 2009 21:51:00 -0800 > From: N0body H0me <n0body.h0me at inbox.com> > Subject: RE: An ebay bargain (I hope!) > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Message-ID: <DF58630CEA8.000001BEn0body.h0me at inbox.com> > Content-Type: text/plain; charset=US-ASCII > > > IN my experience, the 9010's logic probe is a kinda > critical item. When 9010's and related paraphernalia > are surplussed out, the logic probes have this nasty > tendency to vanish. > > You can do alot of good testing with a 9010 and a pod for > your target system, but you really won't be able to fix > anything that's broke (besides memory faults) w/o the > probe. > > They can get kinda pricey . . . . > > > -----Original Message----- > > From: hp-fix at xs4all.nl > > Sent: Thu, 28 May 2009 19:06:19 +0200 > > To: cctalk at classiccmp.org > > Subject: RE: An ebay bargain (I hope!) > > > > Sorry my fault, I was confused I own a Fluke 9100A and a 9105A where the > > 9100 has the harddisk and the 9105A not. > > For those machines I got the pods, docs and the firm- and software files. > > I do have somewhere a 9010 logicprobe. > > > ------------------------------ > > Message: 22 > Date: Thu, 28 May 2009 20:40:40 -1000 > From: Warren Wolfe <lists at databasics.us> > Subject: Re: 1964 Antique MODEM Live Demo > To: General Discussion: On-Topic and Off-Topic Posts > <cctalk at classiccmp.org> > Message-ID: <4A1F8368.1010107 at databasics.us> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Chuck Guzis wrote: > > On 28 May 2009 at 16:29, Fred Cisin wrote: > > > > > >> We saw him dial, and put the handset into the cradle, but he did NOT > >> shut the lid. The notch is there for a reason. If you don't close > >> the lid, ambient noise, such as a nearby printer or 026, can be a > >> problem. > >> > > > > Yeah Fred, but a modern laptop isn't nearly as noisy as an ASR33! I > > don't recall Silent 700 terminals having any such lid on the acoustic > > coupler. > > The ASR I used in high school, and the one I bought, both had acoustic > couplers that had rubber seals around both sides, and fit a Western > Electric simple phone precisely. As a matter of fact, when you would > remove the phone, it would make a sucking kind of 'pop' noise when the > phone came out of the cradle. There was no lid involved. A picture of > one of these beasts prior to restoration is available at: > > http://www.pdp8.net/asr33/pics/old_front.shtml?large > > The rubber cups are missing, though... > > > Warren > > > ------------------------------ > > Message: 23 > Date: Fri, 29 May 2009 08:23:04 -0400 > From: Ethan Dicks <ethan.dicks at gmail.com> > Subject: Re: VT-6 kit > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Message-ID: > <f4eb766f0905290523x746cf9w30ab79e7119eae84 at mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > On Fri, May 29, 2009 at 2:36 AM, bfranchuk at jetnet.ab.ca > <bfranchuk at jetnet.ab.ca> wrote: > > PS. Still wondering ... did a VT220 work with a PDP8 running OS/8? > > Yes. I did it in the 1980s (in large part because the VT220 had 20mA > built-in). I don't remember the terminal settings, though. > > What did not work was the VTEDIT TECO macro. There's something > inexact about the VT52 emulation in a VT220. The cheapest solution at > the time was to get a real VT52 (about $50 to buy and $30 to ship). > That's what I did. > > If you are just doing rather ordinary things with OS/8, a VT220 should > work just fine. > > -ethan > > > End of cctech Digest, Vol 69, Issue 48 > ************************************** _________________________________________________________________ Windows Live?: Keep your life in sync. http://windowslive.com/explore?ocid=TXT_TAGLM_BR_life_in_synch_052009

14 years, 11 months

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test-drb June 2009