Re: Look to get a copy of a Multi-Tech FM300 Modem manual
https://www.multitech.com/about-us/history How accurate is this Multi-Tech history? Ed# In a message dated 10/30/2017 11:07:17 P.M. US Mountain Standard Tim, cctalk@classiccmp.org writes: That would be great. Next year as one of my teleprinter demonstrations I want to have a Teletype 33 or 35 and the FM300 and a Bell System 500 rotary dial desk phone. -pete On Sun, Oct 29, 2017 at 8:20 PM, Chris Elmquist wrote: > Give me a day or two and I think I can help you out. I used to work at > Multi-Tech when the FM300 was still a product. I have several along with > original schematics, which are "blue prints"... > > I have almost as many stories about Multi-Tech as I do ETA ;-) > > Chris > > On October 29, 2017 1:40:03 PM CDT, Pete Lancashire via cctalk < > cctalk@classiccmp.org> wrote: > >I've acquired a Multi-Tech FM300 acoustic modem and even though I could > >figure out the pin-outs > >and switch settings, it would be great if I could get a copy of the > >original manual. > > > >Goal is to add it to a Teletype 33 or 35 and a Bell System 500 desk > >set. > > > >-pete > > -- > Chris Elmquist > >
Re: Tubbs fire consumed the collected archives of William Hewlett and David Packard
This article has more details about the archive situation and, more important, it has a comment from HP at the end. https://spectrum.ieee.org/view-from-the-valley/tech-history/silicon-revolution/loss-of-hewlettpackard-archive-a-wakeup-call-for-computer-historians
Re: Look to get a copy of a Multi-Tech FM300 Modem manual
they claim FIRST ACOUSTIC COUPLER IN 1970 nah... GE 1968 My customer has an Olivetti terminal that he wants to use on GE Time-Sharing Service. How much does our acoustic coupler cost and what is the rental fee? The TDM 114 acoustic coupler rents for $25 a month (including maintenance by service shops) and sells for $395. The TDM 115 acoustic coupler costs $495. Aug. 1968 GE service Note - time share etc Multi-Tech says... 1970: Dr. Sharma founds and incorporates Multi-Tech Systems, renting new office space in the basement of the Schneider's Drug building in Minneapolis. He sells the world's first acoustic coupler to Professor Schmitt, inventor of the Schmitt trigger, for $300. worlds first? hmmm... Not. Remember too the Deaf had acoustic couplers prior to 1970 also! Ed# _www.smecc.org_ (http://www.smecc.org) In a message dated 10/31/2017 12:02:56 A.M. US Mountain Standard Tim, cctalk@classiccmp.org writes: https://www.multitech.com/about-us/history How accurate is this Multi-Tech history? Ed# In a message dated 10/30/2017 11:07:17 P.M. US Mountain Standard Tim, cctalk@classiccmp.org writes: That would be great. Next year as one of my teleprinter demonstrations I want to have a Teletype 33 or 35 and the FM300 and a Bell System 500 rotary dial desk phone. -pete On Sun, Oct 29, 2017 at 8:20 PM, Chris Elmquist wrote: > Give me a day or two and I think I can help you out. I used to work at > Multi-Tech when the FM300 was still a product. I have several along with > original schematics, which are "blue prints"... > > I have almost as many stories about Multi-Tech as I do ETA ;-) > > Chris > > On October 29, 2017 1:40:03 PM CDT, Pete Lancashire via cctalk < > cctalk@classiccmp.org> wrote: > >I've acquired a Multi-Tech FM300 acoustic modem and even though I could > >figure out the pin-outs > >and switch settings, it would be great if I could get a copy of the > >original manual. > > > >Goal is to add it to a Teletype 33 or 35 and a Bell System 500 desk > >set. > > > >-pete > > -- > Chris Elmquist > >
Re: Tubbs fire consumed the collected archives of William Hewlett and David P...
I think there are some people that will state anything at this point at Corp. to cover their ass's over this debacle... Ed# In a message dated 10/31/2017 12:19:44 A.M. US Mountain Standard Tim, cctalk@classiccmp.org writes: This article has more details about the archive situation and, more important, it has a comment from HP at the end. https://spectrum.ieee.org/view-from-the-valley/tech-history/silicon-revoluti on/loss-of-hewlettpackard-archive-a-wakeup-call-for-computer-historians
Re: Does anyone need any before I list them on eBay?
Hi Do you have a BA11-VA ? Thank you, Pontus. On Tue, Oct 31, 2017 at 01:54:24AM -0500, Paul Anderson via cctalk wrote: > I have several Q-bus boxes available: > > BA11-M 4x4 > MA11-N 4x9 > BA11-S > BA23- no cases right now, a few have rack mount kits, some I'll hang on to > till I find the >micro vax boards. Looking for offers. > > MOST CAN BE SHIPPED! Probably under $100 in US. > > All boxes can be configured within reason, but I am getting short of > memory, in more ways than o > one... > > I might be leaving Illinois and going to Baltimore, maybe Virginia, then > north to the Boston area, back through NY, through Canada, Detroit, and > back to Illinois. I could be leaving as soon as next week. > > There is another list member coming through here from the east coast and > going to Denver and back. Hopefully he'll junk in here... > > Thanks, Paul > > On Tue, Sep 12, 2017 at 2:02 AM, Paul Anderson wrote: > > > I'm still trying to sell some extra Q-bus boards before I list them on > > ebay, and I would rather they found a happy home here. > > > > Shipping is a flat $10 within the US for as many as you want. Please ask > > for overseas shipping. If you need any others, or have a "wishlist" please > > contact me off list. > > > > Thanks, Paul > > > > M3106 DZQ11 $40 > > M3107 DHQ1140 > > M8043 DLV11-J 60 > > M8186 11/23 CPU 60 > > M8189 11/23+ CPU 60 > >
Yet More New Items For Sale from Ye Olde VintageTech archives
Here is yet another batch of items for sale. Full running list with updates is here: http://www.vcfed.org/forum/showthread.php?58709-New-Items-For-Sale-Check-the-List-and-Make-an-Offer-or-Request&p=483525#post483525 New items for October 31, 2017: Boards Problem Solver Systems, Inc. Model RAM16 16K Static RAM - for S100 systems, with original instruction manual; uses TMS4045 1024 word x 4-bit static RAM - $40 Vector 2201-1 S100 prototyping board - unused, has gold plated edge connector with one pad per each pin, and a grid of holes - $15 Wameco EPM-2 - completely bare/unpopulated EPROM board for S100 bus - $10 Artec Electronics WW-100 [REV. 1] - completely bare/unpopulated S100 board - $5 MediaVision Pro Audio (1993) - ISA 16-bit board, brand new, in originally sealed anti-static bag - $5 Peripherals Atari SX212 - modem only, no power supply - $10 Commodore VICMODEM - clean condition, minor scratches on face label - $13 shipped anywhere in USA Tandy Enhanced Keyboard - 5-pin DIN connector; includes form-fitting dust/spill-cover so keyboard is extremely clean - $25 TRS-80 Acoustic Coupler for TRS-80 Portable Computer Model 100 - excellent condition, in original (very good condition) box - $20 Floppy Disk Services, Inc. 5SVA&T-2 dual 5.25" disk drive - has two Matsushita JA-551-2 half-height drives and dual 34-pin female header socket ribbon cable, for TRS-80(?); powers up, both drives spin briefly, unable to test further - $40 Parts Heathkit H19 keybaord - decent shape; missing 4 keycaps on numeric keypad (6, 9, and the two next to 0) and two on the main keyboard (next to BACK SPACE and REPEAT); marked 85-2223-1 and 111078, "COPR HEATH 1978"; unknown functional condition - $10 Computers JUKO Tiny Pro SF - small footprint (10" x 11.5", 3" high) PC - motherboard has Harris CS80C286-16 CPU, Oak Technology OTIVGA, AMI 286 BIOS, floppy & IDE controllers; integrated NEC FD1138H 3.5" floppy drive; requires 5-pin DIN 5VDC/7A power supply (not included); unable to test - $40 Apple //e - standard 64K model, bare bones, no adaptors; works great all around, very nice condition with some yellowing - $40 Software Infocom Suspended on 8" floppy disk in original Infocom sleeve for CP/M (single density disk), near new looking - $20 Altera MAX+plus II Programmable Logic Development System - complete package, includes Getting Started, User Guide, and AHDL manuals, version 4.02 software (Quartet?) diskettes still in shrinkwrap sealed envelope, Max+plus II Software Guard dongle - $40 The Clone Machine with Unguard - a Commodore 64 program for copying/inspecting/editing disks (cracking tool); includes original disk, user made working disk, original manual - $20 including shipping to anywhere in USA MacProject - project management software for original Macintosh and Lisa computers (as indicated on original box); box is in decent condition with several creases and kind of punched in on the back; includes two MacProject program disks and one A Guided Tour disk, labels are foxing - $15 Accessories Apple Macintosh 512K enhanced accessory kit - includes Macintosh 512K enhanced user guide, Mac software catalog & sampler, product registration card, packing list, A Guided Tour (audio cassette, shrinkwrapped); missing system software diskettes ; box is pushed in from the top and creased in the corners but otherwise in fine shape; I'll throw in The Easy Guide to Your Macintosh (Sybex, 1984) - $25 Original manual (shrinkwrapped) and Warranty, registration card inserts for Apple 3.5" Drive, plus drive number stickers - $6 More information and photographs for any item upon request, but please have serious intent to purchase and not just being a looky-loo as I field a lot of requests and it takes a lot of time I'm happy to negotiate a bulk price for multiple items, combined shipping is cheaper, and items are always packed efficiently with superior care and materials. Shipping is from California. Local pick-up is highly encouraged (you get to shop my inventory). International purchasers are always welcome. As always, please send inquiries to me directly via e-mail ( sellam.ism...@gmail.com) for best results. Thanks! Sellam
Re: Does anyone need any before I list them on eBay?
On 2017-10-31 00:54, Paul Anderson via cctalk wrote: There is another list member coming through here from the east coast and going to Denver and back. Hopefully he'll junk in here... Thanks, Paul Who is it, and where on the east coast is he?
Re: Which Dec Emulation is the MOST useful and Versatile?
> On Oct 27, 2017, at 5:00 PM, Phil Blundell via cctalk > wrote: > > On Fri, 2017-10-27 at 13:38 -0700, Brent Hilpert via cctalk wrote: >> I wonder if they were just trying to draw an analogy between the >> inherent dynamic operation requirements of magnetic logic and the >> dynamic operation requirements of some (many?) NMOS designs (not >> really inherent to NMOS). > > On the subject of NMOS dynamic logic, someone recently pointed out a > paragraph in the technical manual for a 1990s ARM2-based computer which > warned of dire consequences, including possibly destruction of the > chipset, if the circuitry was left powered with the clock stopped for > more than a second or two. > > Obviously if the clock is stopped for more than a few hundred > microseconds then the logic will start to lose its marbles and the > system will need a reset to recover. But I don't think I've previously > heard any suggestion that dynamic logic ICs would actually be damaged > or destroyed under these circumstances. I can just about imagine that > there might be some situation where an invalid internal state would > result in a short circuit between power and ground, but that's just > supposition really. Anybody know of a case where something bad has > actually happened? I don't understand this at all. "Dynamic logic" is not a familiar concept, and certainly the NMOS logic I know isn't dynamic. Memory (DRAM) is dynamic, and will forget if you don't refresh it. But DRAM doesn't mind if you stop the clock, it just won't remember its data. So I don't know how you might have a logic design that "loses its marbles" if you stop the clock. And anything that is fried by clock loss is, in my view, the work of someone who should not be allowed anywhere near a EE shop. Incidentally, while "soft core" magnetic logic is dynamic, memory core logic is not. You could slow that down and it would still work. The signals are pulses, not levels, but the pulses will still happen with a 1 Hz clock. paul
BBS software was Re: looking at buying a pocket PC / PDA
I am looking for BBS software to run on my linux computer that i can use to down/up-load stuff for my psion 5mx I have 2 xbees[1] to make the link PS: I know there is pswin[2] [1]: they are radio modems, see https://www.sparkfun.com/pages/xbee_guide [2]: http://psion.info/GJ5/psiwin233_32.html Forwarded Message Subject:Re: looking at buying a pocket PC / PDA Date: Mon, 30 Oct 2017 06:38:23 +1000 From: tom sparks To: Mike Stein , General Discussion: On-Topic and Off-Topic Posts I want download all the data before I go and upload it when I return or use a "dial-up" connection[^1] [^1]: I am really unsure if I want to go down the TCP/IP path
Re: H7861 PSU issues
Just had another look after watching a video about how switch mode power supplies work On the small control board connecting to J4, there are two D44Q1 transistors. As expected, there is about 65KHz going into the base of the transistor for the 5V side. However, there is no signal going into the base of the transistor for the 12V side, from pin 3 of the 555. So, it looks like the problem is coming from around here. I measured the suspicious components around the 555 and they seem fine. How likely is it that the 555 is dead? There is 10v going into pin 8, which I believe is correct. Thanks, Aaron. Aaron Jackson writes: > Hi everyone, > > I've been trying to figure out what is wrong with the 12V rail on my > H7861 (BA11-S) power supply. It's showing about 4.2V. The 5V rail is > spot on. > > Page 39 of the following schematics is the main part board of the PSU. > http://bitsavers.org/pdf/dec/qbus/MP01233_BA11-S_schem_Mar81.pdf > > Going into the collector of Q3 is about 80V coming straight from T2 (I > think I measured it at about 100Hz), but the emitter is putting out the > 4.2V, which is the same as the base voltage and output voltage. I tried > replacing this transistor because the hFE was about 80 and a good one > was about 120. Unfortunately it didn't do anything. > > None of the capacitors look swollen and I don't see any leakage. There > is a smaller board which I think goes into J4. The 12V side seems to > have a 555 timer and adjusting the pot doesn't change the voltage at > all. > > My understanding of switchmode power supplies is very poor. Does anyone > have some pointers on what to check or what might be the possible cause? > > Hopefully I can get my PDP up and running again... Only got about 20 > minutes use out of it. > > Thanks! > > Aaron. -- Aaron Jackson PhD Student, Computer Vision Laboratory, Uni of Nottingham http://aaronsplace.co.uk
H7861 PSU issues
Hi everyone, I've been trying to figure out what is wrong with the 12V rail on my H7861 (BA11-S) power supply. It's showing about 4.2V. The 5V rail is spot on. Page 39 of the following schematics is the main part board of the PSU. http://bitsavers.org/pdf/dec/qbus/MP01233_BA11-S_schem_Mar81.pdf Going into the collector of Q3 is about 80V coming straight from T2 (I think I measured it at about 100Hz), but the emitter is putting out the 4.2V, which is the same as the base voltage and output voltage. I tried replacing this transistor because the hFE was about 80 and a good one was about 120. Unfortunately it didn't do anything. None of the capacitors look swollen and I don't see any leakage. There is a smaller board which I think goes into J4. The 12V side seems to have a 555 timer and adjusting the pot doesn't change the voltage at all. My understanding of switchmode power supplies is very poor. Does anyone have some pointers on what to check or what might be the possible cause? Hopefully I can get my PDP up and running again... Only got about 20 minutes use out of it. Thanks! Aaron.
Re: Which Dec Emulation is the MOST useful and Versatile?
On 10/30/2017 12:43 PM, Paul Koning via cctalk wrote: >> On Oct 27, 2017, at 5:00 PM, Phil Blundell via cctalk >> wrote: >> >> On Fri, 2017-10-27 at 13:38 -0700, Brent Hilpert via cctalk wrote: >>> I wonder if they were just trying to draw an analogy between the >>> inherent dynamic operation requirements of magnetic logic and the >>> dynamic operation requirements of some (many?) NMOS designs (not >>> really inherent to NMOS). >> On the subject of NMOS dynamic logic, someone recently pointed out a >> paragraph in the technical manual for a 1990s ARM2-based computer which >> warned of dire consequences, including possibly destruction of the >> chipset, if the circuitry was left powered with the clock stopped for >> more than a second or two. >> >> Obviously if the clock is stopped for more than a few hundred >> microseconds then the logic will start to lose its marbles and the >> system will need a reset to recover. But I don't think I've previously >> heard any suggestion that dynamic logic ICs would actually be damaged >> or destroyed under these circumstances. I can just about imagine that >> there might be some situation where an invalid internal state would >> result in a short circuit between power and ground, but that's just >> supposition really. Anybody know of a case where something bad has >> actually happened? > I don't understand this at all. "Dynamic logic" is not a familiar concept, > and certainly the NMOS logic I know isn't dynamic. Memory (DRAM) is dynamic, > and will forget if you don't refresh it. But DRAM doesn't mind if you stop > the clock, it just won't remember its data. > > So I don't know how you might have a logic design that "loses its marbles" if > you stop the clock. And anything that is fried by clock loss is, in my view, > the work of someone who should not be allowed anywhere near a EE shop. NMOS dynamic logic relies on two things memory or register cells that operate just like Dram so they forget without refresh. It also relies on logic nodes that precharge to some state and are selectively discharged by the logic. Doing that saves resistive pullups or complementary logic. This type of logic has a specified minimum clock though you could usually go far slower. The 8080 was an early example. > Incidentally, while "soft core" magnetic logic is dynamic, memory core logic > is not. You could slow that down and it would still work. The signals are > pulses, not levels, but the pulses will still happen with a 1 Hz clock. The timing of the logic in some cases where tied to the switching time of the cores used. Otherwise it was hard to determine when and if the core switched. However rope core and ferro-transformers would work at any rate so long as the pulse waveform was had the right rise and fall times. FYI rope core was basically many transformers either with a wire in for the bit or wire around for the not bit. The cores for rope didn't change magnetic state like coincident current cores of the bistable type as that allowed read write but was DRO (destructive read out with re-write) which is the more familiar core and why it had a shorter read time and a longer cycle time between reads. Both have a fair amount of documentation out there. The ferro-transformer logic were documented well too but you have to hunt for info. They also came in many forms as to the logic performed including storage. Allison > paul >
Re: BBS software was Re: looking at buying a pocket PC / PDA
I'd get a RS232toWIFI dongle, they're cheap and easy to make a connection via simple terminal software to an outside telnet target. On Tue, Oct 31, 2017 at 6:02 PM, tom sparks via cctalk < cctalk@classiccmp.org> wrote: > I am looking for BBS software to run on my linux computer that i can use > to down/up-load stuff for my psion 5mx > > I have 2 xbees[1] to make the link > > PS: I know there is pswin[2] > > [1]: they are radio modems, see https://www.sparkfun.com/pages/xbee_guide > [2]: http://psion.info/GJ5/psiwin233_32.html > > > Forwarded Message > Subject:Re: looking at buying a pocket PC / PDA > Date: Mon, 30 Oct 2017 06:38:23 +1000 > From: tom sparks > To: Mike Stein , General Discussion: On-Topic > and Off-Topic Posts > > > > I want download all the data before I go and upload it when I return or > use a "dial-up" connection[^1] > > [^1]: I am really unsure if I want to go down the TCP/IP path >
Re: Which Dec Emulation is the MOST useful and Versatile?
On 10/30/2017 03:44 PM, Paul Koning wrote: > The timing is carefully orchestrated, including of course provision > for cable delays. I'm reminded of a unit manager at CDC that I worked with for a time. His first job at CDC as a fresh EE out of UofMinn was to measure all the loops of cable on the backplane of the then-new 6600 to which Seymour had attached tags that read "TUNE". One marvels at the fiddling that must have been involved getting the thing to run. Fun with taper pins... Cray was certainly a character. Another associate regaled us with his experience outside Seymour's lab in Chippewa Falls, sitting with a couple of others in a car on a cold dark winter night exchanging code and listings with Cray's daughter at the door. He was not about to let them inside... --Chuck
DEC RX03 RT11A file extractor
List: This is the first time I've run across a bunch of double-sided 8" double-density floppies in RX02 encoding. I'm assuming that this is what's known as the RX03. The system is identified on disk as RT11A. Does anyone know of a program to extract the files from images of this sort (1,025,024 bytes: 26x256 sectors/track, 2 sides, 77 tracks)? I've tried John Wilson's PUTR, but it hangs when it sees the image--I can mount the image, but then anything after that just hangs the program. I'd prefer a Linux program, but DOS/Windows would be fine. Otherwise, I'll sharpen my pencil and get coding... Thanks, --Chuck
RE: H7861 PSU issues
I had a dead 555 on a completely different PSU, so it could be worth checking. I socketed it when I replaced it so it was easy to replace again. Also, just because a capacitor doesn't appear swollen or show signs of leakage, it seems that this doesn't necessarily mean that it doesn't need replacing. In yet another PSU that I repaired recently, replacing the capacitors fixed it, although in the end I think the one that really fixed it was showing signs of leakage. On a lot of caps that I replace they show no leakage signs, but I do see a bit of a deposit on the negative terminal, I am not sure if this is a sign of any kind of problem. Regards Rob > -Original Message- > From: cctech [mailto:cctech-boun...@classiccmp.org] On Behalf Of Aaron > Jackson via cctech > Sent: 31 October 2017 21:26 > To: cct...@classiccmp.org > Subject: Re: H7861 PSU issues > > Just had another look after watching a video about how switch mode power > supplies work On the small control board connecting to J4, there are two > D44Q1 transistors. As expected, there is about 65KHz going into the base of the > transistor for the 5V side. However, there is no signal going into the base of the > transistor for the 12V side, from pin 3 of the 555. So, it looks like the problem is > coming from around here. I measured the suspicious components around the > 555 and they seem fine. > > How likely is it that the 555 is dead? There is 10v going into pin 8, which I > believe is correct. > > Thanks, > > Aaron. > > > > > > Aaron Jackson writes: > > > Hi everyone, > > > > I've been trying to figure out what is wrong with the 12V rail on my > > H7861 (BA11-S) power supply. It's showing about 4.2V. The 5V rail is > > spot on. > > > > Page 39 of the following schematics is the main part board of the PSU. > > http://bitsavers.org/pdf/dec/qbus/MP01233_BA11-S_schem_Mar81.pdf > > > > Going into the collector of Q3 is about 80V coming straight from T2 (I > > think I measured it at about 100Hz), but the emitter is putting out > > the 4.2V, which is the same as the base voltage and output voltage. I > > tried replacing this transistor because the hFE was about 80 and a > > good one was about 120. Unfortunately it didn't do anything. > > > > None of the capacitors look swollen and I don't see any leakage. There > > is a smaller board which I think goes into J4. The 12V side seems to > > have a 555 timer and adjusting the pot doesn't change the voltage at > > all. > > > > My understanding of switchmode power supplies is very poor. Does > > anyone have some pointers on what to check or what might be the possible > cause? > > > > Hopefully I can get my PDP up and running again... Only got about 20 > > minutes use out of it. > > > > Thanks! > > > > Aaron. > > > -- > Aaron Jackson > PhD Student, Computer Vision Laboratory, Uni of Nottingham > http://aaronsplace.co.uk
