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

DOS video device drivers

by rampaginggreenhulk＠yahoo.com

What do they consist of? Is a brief description possible. Please.

13 years, 4 months

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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

------------------------------ On Thu, Feb 28, 2013 12:22 PM PST Tony Duell wrote: >I do wonder, though, why you think the HP67 (1975-ish) was the last >useable HP calcualtor. I feel the HP41 and HP71 families are also >well-desngied. Current HP models, fo coruse, are not. > >-tony In a mad fit I sold my 50g. I could see myself buying another one. The 75mhz Arm made the clearing of the stack tolerable (less then a second, 3-4 on the 49g. Zounds). You got to love something. You can't fix everything in this day and age. I'm told the TI-nspire CX CAS is more toy then anything. You gotta love something though. My 49g's have fallen on hard times. Can't figure out why my old TI86 doesn't work, I used it 3 times. Need a replacement. Need one bad...

13 years, 4 months

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cctech Digest, Vol 114, Issue 42

by tmfdmike＠gmail.com

Bit late, but I'm totally up for... let's say three... Omnibus-USB interfaces. Let me know details when they're fixed - price, ordering etc. Mike http://www.corestore.org 'No greater love hath a man than he lay down his life for his brother. Not for millions, not for glory, not for fame. For one person, in the dark, where no one will ever know or see.'

13 years, 4 months

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Xerox 16/8 was Re: HPUX Enterprise Operating Environment

by rampaginggreenhulk＠yahoo.com

Hey Dave, is your Xerox fully functional?

13 years, 4 months

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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

------------------------------ On Thu, Feb 28, 2013 11:55 AM PST Jim Stephens wrote: > >On 2/28/2013 11:40 AM, Chris Tofu wrote: >> What about security? Does Rpi employ a firewall and virus scanning? And since the pi uses sd storage, it might make more sense to compare it's internet capabilities with a tablet or smart phone. >Raspian, the debian equivalent that runs on the Pi is just one of many OS's that run on that target. > >You have confused the target (arm 7) and platform (Raspberry Pi) with the OS. The things you speak of above have entirely to do with the OS and nothing to do with the platform or target, other than performance. > >The Rpi has nothing to do with firewall, virus scanning, or security in this context. It is true that many target processors have enhanced security and media extensions, but I do not think the Pi has such. > >And unless you go out of your way to run windows or macos emulations on the rpi, the virus is pretty much astronomically useless to discuss. The chances of any targeted virus to an arm at this point is pretty remote, though I'm sure there are linux exploits that may be applies. C: we were specifically discussing performance. People seem to have an inordinate attachment to this thing. And do I have to say again I'm not altogether panning it. But to state there's no concerns about virus' on a unit that's being touted as general purpose computer is insane. The performance benefits obviously have everything to do with what it's running (commonly running?). You could install an inefficient pig on rpi just like anything else. I'm not confusing anything. There's many reasons why things go slow and things go fast.

13 years, 4 months

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HPUX Enterprise Operating Environment

by xmechanic＠landcomp.net

Don't know if anyone is interested, but I have a complete boxed set of HPUX 11i Ver. 1 Enterprise Operating Environment complete with Gold Pack updates, and Bonus Pack Software. Covers most all of the PA-RISC machines capable of supporting HPUX 11i (9000 series servers, workstations, etc.) I had bought it several years ago for a J6750 workstation that I eventually changed over to Linux. You can see the details here... http://www.landcomp.net/index.php/2012-11-28-23-34-35/15-computer-related/7… -- Dave Land Land Computer Service Check out my site at http://www.landcomp.net

13 years, 4 months

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For Sale - Kaypro II

by xmechanic＠landcomp.net

Non-Linear Systems Kaypro II - 1983? model Serial No. 27171 Machine is complete with 2 - 5.25" floppy drives and powers up, but I have no software to test it fully. Has new keyboard cable and comes with power cord. Need to unload some stuff to make room for some new office furniture that I just acquired. $125.00 USD + shipping Shipping weight with packing would be around 30 - 33 lbs. http://www.landcomp.net/index.php/2012-11-28-23-34-35/18-vintage-computer-s… -- Dave Land Land Computer Service Check out my site at http://www.landcomp.net

13 years, 4 months

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IBM 5150 ROMs

by rampaginggreenhulk＠yahoo.com

On Thu, Feb 28, 2013 12:25 PM PST Tom Cruise wanna be wrote: >Easy enough to do, just stop watering him. My roots go deep enough and are strong enough to snap an F15 hull like an eggshell. >g. > >-- >Proud owner of F-15C 80-0007 >http://www.f15sim.com - The only one of its kind. >http://www.diy-cockpits.org/coll - Go Collimated or Go Home. >Some people collect things for a hobby. Geeks collect hobbies. > >ScarletDME - The red hot Data Management Environment >A Multi-Value database for the masses, not the classes. >http://www.scarletdme.org - Get it _today_!

13 years, 4 months

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IBM 5150

by rampaginggreenhulk＠yahoo.com

This will be little help, and I can't recall the exact details, but a magazine I used to have described a circuit that IIRC put MDA on a composite monitor. It was Micro something, and common enough but just wasn't BYTE or PC Mag. And you built the thing by wire wrapping w/machine pin sockets and pins that at the time IIRC you could only get from Mouser. They were named as the source anyway. Have you tried beeping? I think rom BASIC supports beeping or some kind of rudimentary sound generation. With no floppy disk or h/d it automatically loads BASIC. Hallelujah. It can be a useful diagnostic tool.in some instances.

13 years, 4 months

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IBM 5150 ROMs

by rampaginggreenhulk＠yahoo.com

>Anybody remember USES of the SIXTH ROM socket? Sorry no >"MBI" (probably a different MBI) made a supplement ROM that added >some printer configuration features, etc. >I think that there still is one in my 16K 5150 Such a big market for them old printers these days (ok a plotter is a sort of printer and the only way anyone's getting mine is wrenching it from my cold rigor mortised embrace. And would you believe I only payed 5 clams. How much joy can you get for 5$ these days???) >Other "non-standard" ROMs: >Todd Fischer? made a diagnostics ROM, to temporarily replace the BIOS ROM, >and communicate through the serial port! Ooh gimme dat! I want one seriously. What's his phone number? ROM monitors are standard on many Japanese puters, Canon, NEC. Just can't find any docs :( You can pop the hood and put in a new chip. But what about an extension via the all too popular casette port? > >-- >Grumpy Ol' Fred cisin at xenosoft.com

13 years, 4 months

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IBM 5150

by rampaginggreenhulk＠yahoo.com

------------------------------ On Thu, Feb 28, 2013 11:53 AM PST Cindy Croxton Electronics Plus wrote: >We have IBM 5150s here. I can put almost any 8-bit ISA video card in it, >and get the boot sequences on the screen. If it is supposed to be color, >but comes up b/w, then I make a batch program called color.bat or whatever >and reference the driver for the card, and presto, I have color. Some of >these old cards came with drivers, and I have a very large collection of >these very old drivers. But again a driver is different from the post code contained in the extension rom. You can also change the screen from a black and white screen (not the same as an MDA screen) with a mode command in dos or screen in BASIC. >Some of the old cards have switches or some other means to set the graphics >mode and resolution, but others do not. There are very few old 8-bit cards >that will not work on the 5150. True. But there are a lot of cards out there that aren't CGA, MDA, EGA, PGC, VGA and they're seldom seen. >I have never seen Autocad for a 5150, but there are color games for the >5150, and if you have a color monitor, the games have code in them to set >the colors and resolution. Since there were a number of cards, and thus a >wide variety of options for the game programmers, they usually chose 8 or 16 >colors, and told the user to choose 40 or 80 columns, and then you had a >color game. Granted, circles and ovals looked like a bunch of tiny squares >lined up to make a circle or oval, but they ran pretty well. Autocad didn't need drivers for CGA, but did to run advanced modes of some cards even if they did emulate or were really CGA but on steroids. You needed drivers to run A* in high res modes on the IBM Professional Graphics Controller, which starts right up as double scanned CGA (on a 5175 or multisync). Autocad had to provide drivers for bloody loads of cards if they wanted their s/w to work. Whether the high res modes were initialized by the driver or at startup along with the CGA's 6845 registers I couldn't tell you. But probably at POST. I did have a problem with the PGC card on one AT, but didn't investigate and the problem may have been that it was setup for MDA (do you set dip switches in an AT like a PC or PC/XT?). But I seem to recall putting in a VGA card subsequently. Does the VGA also look like an MDA to an early PC/XTG/AT? >-----Original Message----- >From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org] >On Behalf Of Chris Tofu >Sent: Thursday, February 28, 2013 12:51 PM >To: cctalk at classiccmp.org >Subject: RE: IBM 5150 > > > >------------------------------ >On Thu, Feb 28, 2013 10:18 AM PST Cindy Croxton Electronics Plus wrote: > >>Why can't you just write a small batch program that references the >>driver and the necessary commands, and put it on the startup disk? If >>not enough room on a 360K, then you can use a second floppy. We used >>to do this for customers all the time, 15 years ago. Also included >>small start up menus, etc. > > Drivers = extension rom code? Interesting proposition. I'll wager it's not >very straitforward. Numerous graphics cards had drivers for say Autocad and >whatnot. But that's entirely different from the startup code needed to set >up initial register values and whatever on the cards chips. > It seems what you're saying is the pc will startup w/o video (usually >returns an error, but you can use a pc w/a terminal off the rs232 port, just >don't ask me the particulars). Then initialize the video card as dos is >starting. Seems possible, would be interesting to see someone do it. > >>-----Original Message----- >>From: cctalk-bounces at classiccmp.org >>[mailto:cctalk-bounces at classiccmp.org] >>On Behalf Of madodel >>Sent: Thursday, February 28, 2013 11:48 AM >>To: General at proxyz14.mailnet.ptd.net; >>Discussion at proxyz14.mailnet.ptd.net >>:On-Topic and Off-Topic Posts >>Subject: Re: IBM 5150 >> >>On 2/28/13 9:43 AM, TeoZ wrote: >> The ROM say IBM 1981, this unit must be early, Serial # 0155185 (did >> they start from #1?). >> >>I was told by David Both that he used the very first PC off the >>assembly line to write the PC Documentation. When I asked what >>happened to PC #1 after he was done with it he said as far as he knew >>the same thing they did to all their internal use machines at the time. >>Stripped it for parts for warranty repairs. >> >>Mark >> >> >> So I guess I have to find an original IBM CGA card then and all is well? >> >> ----- Original Message ----- From: "Christopher Satterfield" >> <christopher1400 at gmail.com> >> To: "General Discussion: On-Topic Posts Only" <cctech at classiccmp.org> >> Sent: Thursday, February 28, 2013 3:53 AM >> Subject: Re: IBM 5150 >> >> >> I believe your VGA problem has to do with the older IBM ROMs, I >> believe you need the '82 BIOS to use a VGA card or any card with it's >> own BIOS, and being as I have a 16-64 KB 5150 with the newer BIOS I >> assume yours will work also, saying you have an EPROM programmer. >> >> -- >> C:\win >> Bad Command Or File Name >> C:\ >> >> >> >> >>-- >> >> From the eComStation Desktop of: Mark Dodel >> >> Warpstock 2013 - http://www.warpstock.org Warpstock Europe 2013 >> -http://www.warpstock.eu >> >> >>For a choice in the future of personal computing, Join VOICE - >>http://www.os2voice.org >> >> "The liberty of a democracy is not safe if the people tolerate the >>growth of private power to a point where it becomes stronger than their >>democratic State itself. That in it's essence, is Fascism - ownership >>of government by an individual, by a group or by any controlling >>private power." Franklin Delano Roosevelt, Message proposing the >>Monopoly Investigation, 1938 >> >>----- >>No virus found in this message. >>Checked by AVG - www.avg.com >>Version: 2013.0.2899 / Virus Database: 2641/6136 - Release Date: >>02/27/13 >> >>----- >>No virus found in this message. >>Checked by AVG - www.avg.com >>Version: 2013.0.2899 / Virus Database: 2641/6136 - Release Date: >>02/27/13 >> > > >----- >No virus found in this message. >Checked by AVG - www.avg.com >Version: 2013.0.2899 / Virus Database: 2641/6136 - Release Date: 02/27/13 > >----- >No virus found in this message. >Checked by AVG - www.avg.com >Version: 2013.0.2899 / Virus Database: 2641/6136 - Release Date: 02/27/13 >

13 years, 4 months

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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

------------------------------ On Thu, Feb 28, 2013 9:18 AM PST Fred Cisin wrote: >> >Surely, we would NEVER have discussed the Raspberry Pi, if you hadn't >> >asked about that damned Acorn! >On Wed, 27 Feb 2013, Chris Tofu wrote: >> I was only stating I was indirectly responsible for this current iteration :O > >Not to worry, >We DO hold you responsible for it Of course!! Everything that goes wrong on the list is my fault! Boy I tell ya!

13 years, 4 months

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IBM 5150

by teoz＠neo.rr.com

I snagged an original IBM 5150 early model and have a couple questions about it. The unit turns on fine and tries to boot from the first floppy drive as far as I can tell, I don't have a MDA monitor and that is what card it came with. When I try a VGA 8 bit card (or my Everex EGA set to CGA) I don't get a screen and it doesn't boot from the floppy (I change the switches 5,6 from OFF/OFF to ON/ON for VGA/EGA). I tried a Taxan Super Color Graphics card but my CGA monitor just shows a few lines scrolling, seems like that card isn't standard CGA. Not sure how much RAM this thing has either. The 16-64K motherboard has 4 full banks, there is a 64K RAM card installed, and I have a MBI Monte Carlo multi function board with 4 banks full of RAM. Anybody have any information on the MBI board, there are 2x 8 block configuration switches on it that would tell me how it is set up. Also the RAM switched on the 5150 are set to OFF, OFF, OFF, OFF, OFF, ON, OFF, OFF which doesn't seem to jive with the setting options here: http://www.rci.rutgers.edu/~preid/pcxtsw.htm There is some damage to the board (was shipped with the PS loose and there is a ding by U26), not sure what that might hurt. Thanks, TZ

13 years, 4 months

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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

>Surely, we would NEVER have discussed the Raspberry Pi, if you hadn't >asked about that damned Acorn! I was only stating I was indirectly responsible for this current iteration :O

13 years, 4 months

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IBM 5150

by rampaginggreenhulk＠yahoo.com

------------------------------ On Thu, Feb 28, 2013 6:43 AM PST TeoZ wrote: >The ROM say IBM 1981, this unit must be early, Serial # 0155185 (did they start from #1?). Don't know where they started, but was told at a company I worked for years ago we had one somewhere under #100. >So I guess I have to find an original IBM CGA card then and all is well? I have a Paradise card that I thought was an early enhanced.CGA model, but might be EGA. I could test it if you're interested and I'd trade you for the Taxan card

13 years, 4 months

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OT: Linux-to-OpenBSD device drivers

by barythrin＠gmail.com

In freebsd there's a linux compatibility library/package at least for binaries but I'd be surprised if there wasn't something similar for compilation. Also freebsd (not openbsd but they're all a family so port is likely) I used ndis to use the windows driver for a not supported at the time wireless card in bsd. Not sure if that would be in line with other drivers as well.

13 years, 4 months

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RGB -> VGA adaptors (was: Re: Tek 4317)

by mtapley＠swri.edu

(also sent to cctalk, but doesn't look like it came through; apologies if duplicates) Some searching on the Color Computer site leads to this: http://miba51.com/CoCo_VGA_Adpater.html Roy Justus' converter from 15.7 kHz RGB as generated by a CoCo3 to 31 kHz VGA. At one point, another was available from Chris Hawks http://permalink.gmane.org/gmane.comp.hardware.tandy.coco/63638 I have no experience with either, nor any connection except being a fellow CoCo user. Hope this helps. At 16:39 -0600 2/26/13, <Sander> wrote: >Message: 12 >Date: Tue, 26 Feb 2013 13:29:38 -0700 >From: Richard <legalize at xmission.com> >To: cctalk <cctalk at classiccmp.org> >Subject: Re: Tek 4317 >Message-ID: <E1UAR9e-0000zT-PL at shell.xmission.com> > > >In article <201302260715.r1Q7FiJL027219 at ls-al.eu>, > Sander Reiche <reiche at ls-al.eu> writes: > >> Richard <legalize at xmission.com> wrote: >> > >> > I have other Tektronix hardware from this time frame and the video >> > output tends to be standard RGB (possibly synch-on-green) BNC >> > connectors. >> >> I'm still pursuing this, but it's taking its time. >> > > Are there any good converters for RGB? Like to VGA? > >Based on this picture, it appears that it would have RGB BNC connectors. ><http://user.xmission.com/~legalize/tmp/vintage/tektronix/xd88/20120417_1304…> > >That implies synch-on-green video signalling. If you don't have a >synch-on-green RGB monitor, then you'll need an adapter to convert >that to VGA (which splits the synch signals out on a separate pin). >These shouldn't be too hard to find because synch-on-green was fairly >common. >-- >"The Direct3D Graphics Pipeline" free book <http://tinyurl.com/d3d-pipeline> > The Computer Graphics Museum <http://computergraphicsmuseum.org> > The Terminals Wiki <http://terminals.classiccmp.org> > Legalize Adulthood! (my blog) <http://legalizeadulthood.wordpress.com> -- - Mark 210-379-4635 ----------------------------------------------------------------------- Large Asteroids headed toward planets inhabited by beings that don't have technology adequate to stop them: Think of it as Evolution in Fast-Forward.

13 years, 4 months

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Garbage on screen when using real VT100 on emulated PDP-11

by earl＠retrobits.com

Also posted this question in the Vintage Computer Forums. OK, I'm stumped. I'd like to use a real VT100 as a terminal with an emulated PDP-11 running RT11. When the VT100 is connected to a real PDP-11, it works fine. When connected to the emulated PDP-11, garbage characters begin to appear on the screen when, say, doing a DIR command. The garbage always starts in exactly the same place in the DIR listing. After that, garbage characters (grey squares) become interspersed with the good text. I have tried this with SIMH under Linux, connecting the VT100 to the serial console port of the Linux machine. I've also tried it under E11, using that program's built-in serial terminal capacity. Same exact error in both cases. I've looked at the RT11 SET command for TT: to see if there are any applicable parameters. Can't find any. I've set the SIMH TTO device to all its possible settings: 7B, 7P, 8B, and UC. Same stuff in all cases. I've looked at the serial settings on the VT100 to ensure 8 bits, no parity, and correct baud rate. All good. The VT100 works fine with the Linux box doing Linux-ey things. No character corruption when doing a big "ls" listing, OK with vi, etc. The SIMH and E11 emulators work fine in their virtual consoles, with no character corruption when doing a DIR, etc. Any ideas? I'd really like to, for instance, get my Raspberry Pi to be a mini PDP-11 system, but I can't get past this character garbage when using the real VT100. Help appreciated! And thanks for reading! - Earl

13 years, 4 months

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PDP8 Omnibus to USB interface

by hachti＠hachti.de

Hi folks, I'd like to introduce my newly designed Omnibus-USB interface. I designed a quite well working prototype of something that looks like a KL8E for the PDP8 and like a serial port on the PC - but is none of both :-) It ist not meant as a console terminal replacement (which it could be used as) but as an alternative IO device used to dump (archive!) and restore mass storage media. To the people who don't know the problems of having MASSES of disks and tapes to dump: Please don't flame. Pictures and some more information can be found on my website: http://pdp8.hachti.de?gallery/omnibus_usb My intention is to design an improved (probably full height) version and do a little production run. As I'm currently out of work, selling those boards could help a bit. I can do it only if I get enough preorders. So I ask everybody with serious interest to tell me how many boards he wants and how much he could spend. Based on that feedback I'll decide if I can do it and fix a price. It won't be cheap - but very helpful and cool! I'd really like to make some more. It would be great if there's enough interest to do it. If you have any suggestions, let me know! Kind regards, Philipp :-) -- Dipl.-Inf. (FH) Philipp Hachtmann Buchdruck, Bleisatz, Spezialit?ten Alemannstr. 21, D-30165 Hannover Tel. 0511/3522222, Mobil 0171/2632239 Fax. 0511/3500439 hachti at hachti.de www.tiegeldruck.de UStdID DE 202668329

13 years, 4 months

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Strobe plotter documentation or information?

by Carl.Claunch＠gartner.com

I have it all worked out and tested. It was a parallel IO board using an 8255A, with TTL signals driving the two stepper motors and pen solenoid. TTL 5V signal to one of the four poles of the uniphase stepper motors moves it 3.6 degrees, the operator buttons are reported as inverted TTL signals, no protocols or intelligence at all in the plotter so my job was dead simple. The 20 wire ribbon cable is the six button inputs, the eight stepper motor outputs and the pen solenoid output, plus a ground return. The operator buttons, for example to move the pen to the right, are sent to the computer whose driver would have to step the motor, rather than occurring locally in the plotter. Did I mention that it had zero digital logic chips or intelligence? Nine transistor drivers, a power supply and a few pullup and current limiting resistors, plus the steppers, solenoid, switches and buttons. If anyone else ever needs one, I have documented the cable assignments here so that they are searchable on the web. I will also mention the S-100 bus card assignments to the 8255A ports in case someone wants to use it with a retro machine through the interface card. Pins 1, 2, 4 and 5 are not connected. Pin 3 is ground Pin 6 is inverted TTL input, status of the "start/enter" button on the cover, port PA5 Pin 7 is the central "fast" button for pen movement, inverted TTL input, port PA4 Pin 8 is the "pen right" button, inverted TT input L, port PA3 Pin 9 is the "pen left" button, inverted TTL input, port PA2 Pin 10 is the "pen down" (actually rotate drum and paper up) button, inverted TTL, port PA1 Pin 11 is the "pen up" button, inverted TTL input, port PA0 Pin 12 is the output to activate the pen solenoid so that the pen is marking the paper, TTL 5V to activate, port PB4 Pin 13 is the output for one pole of the drum movement stepper motor, TTL 5V on this and 0 on the other three, port PC3 Pin 14 is the output for a second pole of the drum movement stepper motor, TTL 5V activates, port PC2 Pin 15 is the output for a third pole of the drum movement stepper motor, TTL 5V activates, port PC1 Pin 16 is the output for a fourth pole of the drum movement stepper motor, TTL 5V activates, port PC0 Pin 13 is the output for one pole of the pen left-right movement stepper motor, TTL 5V on this and 0 on the other three, port PB3 Pin 14 is the output for a second pole of the pen left-right movement stepper motor, TTL 5V activates, port PB2 Pin 15 is the output for a third pole of the pen left-right movement stepper motor, TTL 5V activates, port PB1 Pin 16 is the output for a fourth pole of the pen left-right movement stepper motor, TTL 5V activates, port PB0 For those not familiar with stepper motors, they have four poles each with a ring of 25 'teeth' that will attract a permanent magnet on the rotor. The four rings are staggered so that in total there are 100 positions around the dial - 3.6 degrees per step. Energize one pole and the magnet is held to the nearest tooth of that pole. Drop that pole and activate another whose tooth is adjacent and the rotor swings one position to hold at the tooth on that pole ring. Interface is a simple four bit circular shift register with one high and three low bits circulating in the pattern. Shift it once and the motor moves one step in the associated direction. Carl ________________________________ This e-mail message, including any attachments, is for the sole use of the person to whom it has been sent, and may contain information that is confidential or legally protected. If you are not the intended recipient or have received this message in error, you are not authorized to copy, distribute, or otherwise use this message or its attachments. Please notify the sender immediately by return e-mail and permanently delete this message and any attachments. Gartner makes no warranty that this e-mail is error or virus free.

13 years, 4 months

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Dust-cover material

by wilson＠dbit.com

This is a dumb one, but: There used to be commercially available dust covers made out of translucent plastic (vinyl???) that fit over terminals, monitors, printers etc. (and I think there was a full line of custom-fit ones for ham rigs too). It seemed silly at the time but now that I'm chest-deep in old computers/terminals/ peripherals, some of the stuff goes many years between uses and the dust is a real problem. So ... I have a sewing machine (yes older than my computers and come to think of it, it gets dusty too) and more patience than I deserve, but I can't find a source for the kind of plastic sheeting I mean. Hardware-store drop cloths are too flimsy (might as well just use a trash bag) and I've gotten nowhere googling, but maybe that's just because I don't know the correct name. Anyone know what I'm talking about, and where to get it by the yard etc.? Thanks! John Wilson D Bit

13 years, 4 months

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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

I'm sure many will agree this exchange is one for the annals. I can't stop laughing. And to think I started it all by yelping about that damned Acorn!

13 years, 4 months

2
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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

http://www.extremetech.com/computing/148482-the-true-cost-of-a-raspberry-pi… I'm still not knocking it. But what adult male is going to want a Pibow??? Oi vay My idea of a generic netbook case with perhaps a few exchangeable bezels to accommodate various surplus lcd's makes more sense to me. But I hear no mention of the pi supporting a raw lcd panel, like my pmmx sbc's do. Is there any provision for that at all?

13 years, 4 months

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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

------------------------------ On Wed, Feb 27, 2013 1:55 PM PST Tony Duell wrote: >Programming I will grant you, although $deity help you to figure it out ... *puzzled look* Is that particular $deity more responsive based on what you toss in the plate? Perhaps we can arrange a sort of $group $buy wink wink and coerce said $deity into getting a truly hackable piece of fruity dessert on the market.

13 years, 4 months

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PDP-11 / Unibus: config info for Motorola Memory Systems MMS1117 MOS board?

by js＠cimmeri.com

cctalk-request at classiccmp.org wrote: > Subject: > Re: PDP-11 / Unibus: config info for Motorola Memory Systems MMS1117 > MOS board? > From: > ard at p850ug1.demon.co.uk (Tony Duell) > Date: > Sun, 24 Feb 2013 19:37:05 +0000 (GMT) > > To: > cctalk at classiccmp.org > > >> >> > Folks, I'm restoring an 11/34A. One of the MOS memory boards it came >> > with is a circa 1979 Motorola model "MMS1117", variation "58 PC" >> > (64KWords / 18 bits / w/parity). Would like to know if anyone out >> > there has configuration information for this seemingly uncommon board? >> > It's a very high quality board and has socketed RAM, so it'd be >> > especially nice to be able to keep using it. It has 5 switch packs >> > (only 2 of which have markings) and at least a dozen jumpers. >> > > I had a similar problem when I got my first PDP11 (a PDP11/45). The donor > had wanted to keep the memory that was used in it, he gave me what I > later discoveed to be a 32KW MUD board (actually, it could be populated > right up to 128KW, of course only 124K of those would be useable). I had > no idea how to set the swiches, or indeed, what sort of backplane wiring > I would need to use it . > > This was logn before the days of the web. so there was no way to ask > others what to do. > > And I got it working. I spent a few weeks tracing out the scheamtics of > the unknown board and figuring out just what all the switches and jumpers > did. A long job, sure, but IMHO worth it. > > -tony Wow. Do you recall how many layers the PCB had? I'd be interested in seeing a sample scan of the schematic you laboriously produced, just to get an idea of technique. The web has certainly made hobbies like this unimaginably easier, if not just possible at all. - jS

13 years, 4 months

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Garbage on screen when using real VT100 on emulated PDP-11

by cctech＠beyondthepale.ie

> > The VT100 doesn't need padd characters IIRC (VT05 and VT52 definitely > do), but it uses a signalling scheme to tell the host that it's > internal buffer is full. This signalling scheme can be either in the > hardware signalling (DTR/CTS) or it can be XON/XOFF (DC1/DC3) control > characters in the data stream. > According to my VT102 manual, DTR is only turned off when the terminal is offline or performing a line disconnect. It doesn't seem to turn off DTR or any other signal in response to the input buffer becoming full. Under "Input Buffer Overflow Prevention", it goes on to say that there are three methods of input buffer overflow prevention and lists XON/XOFF, fill characters and low speed operation. A table shows the requirement for fill characters for various functions at various baud rates. It suggests that all functions require at least one fill character (null) at 9600 baud, even when not in smooth scroll mode. Regards, Peter Coghlan

13 years, 4 months

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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

Now now Mardy. We can disagree w/o being hilarious. ------------------------------ On Tue, Feb 26, 2013 7:08 PM PST Mardy Marshall wrote: >Raspberry Pi - The Chia Pet of Personal Computers > >-Mardy >

13 years, 4 months

1
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WAMECO FPBC-1 photo mask images

by nekonoko＠mac.com

Does anyone have any photos/drawings of the WAMECO FPBC-1 photo mask for the FPB-1 front panel board? I'm planning on recreating one as finding a stock photo mask is likely impossible at this late date. Thanks much, Pete Plank

13 years, 4 months

1
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Looking for: SWTPC MP-S Serial Interface

by chrise＠pobox.com

On Wednesday (02/27/2013 at 09:58AM -0500), Bill Sudbrink wrote: > > > > I have a SWTPC 6800, but it came with the MP-C. I was thinking of > > building an MP-S with an additional baud rate clock, to get a higher > > speed than the MP-C. > > I may have a spare MP-C. You do know that SWTBUG/MKBUG will operate > an MP-C in slot 1? You don't "need" an MP-S to get your 6800 up. yes-- as I noted to Josh in a private message, SWTBUG would be required to run the MP-S as the console. The original SWTPC 6800 design used MIKBUG and the console interface was an MP-C. SWTBUG was released later as an upgrade ROM and it could support either an MP-C (original equipment) or an MP-S (upgrade) as the console. So, you really need to confirm which monitor ROM the system has to decide what you can or need to do for the console interface. Chris -- Chris Elmquist

13 years, 4 months

3
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For Sale: Macintosh SE/30 and Apple IIGS Monitors

by slandon110＠gmail.com

Hate to part with this one, but it never gets used Mac SE/30 68MB RAM 80MB HDD Ethernet Card Apple Extended Keyboard II Spare 2GB HDD so you can upgrade it. This is one of the models that will run A/UX and NetBSD $300 shipped insured via USPS Priority mail. Also have 15khz Apple IIGS monitors for $50 shipped each

13 years, 4 months

1
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Looking for: SWTPC MP-S Serial Interface

by derschjo＠gmail.com

Subject line says it all -- I picked up a-nearly- complete (and very very extremely dirty and full of mousedetritus) SWTPC 6800 but I'm missing the MP-S serial interface (which will eventually be necessary to doanything too useful with it once I've given the rest of the machine a good soak). Anyone have one going spare or have any leads? Thanksas always, Josh

13 years, 4 months

3
2
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Garbage on screen when using real VT100 on emulated PDP-11

by cctech＠beyondthepale.ie

> > > > OK, I'm stumped. I'd like to use a real VT100 as a terminal with an > > emulated PDP-11 running RT11. > > > > When the VT100 is connected to a real PDP-11, it works fine. When connected > > to the emulated PDP-11, garbage characters begin to appear on the screen > > when, say, doing a DIR command. > > > > The garbage always starts in exactly the same place in the DIR listing. > > After that, garbage characters (grey squares) become interspersed with the > > good text. > > Too high a data rate without flow control. Either enable Xon/Xoff on > both ends or > use hardware control (most PCs do not support that correctly). > > If all else fails set the baud rated to something slower till the > problem goes away. > My VT102 manual describes the grey hatched squares as the substitute character and says they are displayed when the input buffer is full and characters are lost. It also suggests that hardware flow is not available and the only solutions are XON/XOFF, fill characters (nulls) or low speed operation. I strongly suspect the VT100 behaves the same. Appendix E "VT102/VT100 DIFFERENCES" doesn't suggest otherwise although it does say that the VT102 uses a different numbers of fill characters. Regards, Peter Coghlan

13 years, 4 months

1
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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

------------------------------ On Tue, Feb 26, 2013 8:16 PM PST Ethan Dicks wrote: >So the Internet was not invoked in the purchase of _my_ Pi. > >-ethan I may have heard about it on this list. But the next mention or the first was in a magazine, Linux Format probably.

13 years, 4 months

1
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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

------------------------------ On Tue, Feb 26, 2013 6:45 PM PST Doc Shipley wrote > My first foray into hot rods was a carburetor swap, not a full engine >build. I'd never have finished a motor if I'd jumped right into the >deep end. But an entry point can be a Peter Norton book or something like it or interpreted BASIC. Some people, not you, are disgusted with anything done the old ways. To my knowledge, the only way to create a laboratory quality flat piece of cast iron is with a blasted chisel. Newer ways of doing things need to be persued of course. You have to anticipate critiques on a list such as this. I alluded to a discussion with another lister about a 14 year old kid learning how to fix crt based displays. Is there one person on this list who isn't impressed with such a mind? Same kid taught himself calculus. But maybe it's best to break him of that interest in such old crap. It isn't all twitter, facebook and the rest of the garbage with the youngsters and thank God. Nothing against Rpi, just that it's definition of hardware hacking differs from some. Although I generally have an interest in it, and more so after this discussion, there still remains a void when it comes to learning chip level interfacing, leggo style.

13 years, 4 months

1
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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

------------------------------ On Tue, Feb 26, 2013 2:01 PM PST Doc Shipley wrote: > My take on the Raspberry Pi is that it offers EXACTLY what it claims to offer. A cheap, accessible ENTRY POINT into programming and/or hardware hacking. It seems to be more about high level hardware interfacing then hardware hacking in the purest sense - chip level interfacing. Building or modifying a sbc, even a very rudimentary one, from discrete parts is more of what I would expect, and what I did expect when I first heard of it. Or being able to add some sort of functionality, etc.

13 years, 4 months

3
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Strobe plotter documentation or information?

by Carl.Claunch＠gartner.com

On 26/02/2013, Dave wrote: >I found another for sale here, but I can't really afford to buy it and >ship to the UP.... > >http://www.bonanza.com/listings/Strobe-Graphics-System-Plotter-for-Apple-II… I agree. I spotted that one as well when searching, but $499 is way too much to pay to get a manual. Carl ________________________________ This e-mail message, including any attachments, is for the sole use of the person to whom it has been sent, and may contain information that is confidential or legally protected. If you are not the intended recipient or have received this message in error, you are not authorized to copy, distribute, or otherwise use this message or its attachments. Please notify the sender immediately by return e-mail and permanently delete this message and any attachments. Gartner makes no warranty that this e-mail is error or virus free.

13 years, 4 months

1
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Raspberry Pi

by lproven＠gmail.com

On 26 February 2013 00:50, Zane H. Healy <healyzh at aracnet.com> wrote: > > It looks like some sort of AROS distro might be an option as well. Ah, yes, I'd forgotten about that. Yes, the AROS team are working on an ARM version, but AFAIK, at the moment, it can only run loaded as an application running under ARM Linux with X.11 or possibly under QEMU. It cannot yet actually boot on ARM hardware. Given that the Rpi struggles a bit with graphical Linux anyway, it's not really an alternative at the moment. But if or when they ever do produce a native-booting version, that will indeed be an option. AROS is small, slim and fast compared to modern x86 OSs - although it's relatively feature-poor, and like the AmigaOS 3 that it seeks to replicate, it has no VM, no memory protection, no user security or anything. It does have a TCP/IP stack and Web clients, though.] At the moment, TTBOMK, there are 4 OSs that run on Rpi: * Linux, obviously, as used on 99% of Pis * RISC OS - a feature-complete port, but so far lacking graphics acceleration etc. * Preliminary just-about-booting ports of NetBSD and FreeBSD There'a a boot manager but I am not sure it can handle anything except Linux: http://www.berryterminal.com/doku.php/berryboot -- Liam Proven ? Profile: http://lproven.livejournal.com/profile Email: lproven at cix.co.uk ? GMail/G+/Twitter/Flickr/Facebook: lproven MSN: lproven at hotmail.com ? Skype/AIM/Yahoo/LinkedIn: liamproven Tel: +44 20-8685-0498 ? Cell: +44 7939-087884

13 years, 4 months

2
2
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Gates, Zuckerberg urge kids to code

by tom_a_sparks＠yahoo.com.au

" Microsoft chairman Bill Gates, Facebook CEO Mark Zuckerberg and Twitter creator Jack Dorsey are among the tech celebrities in a new video to promote the teaching and learning of computer coding in schools. Titled What most schools don't teach, the video released online on Tuesday begins with Zuckerberg, Gates and other tech icons recalling how they got their start in coding. For some, it was in sixth grade. For others, such as Ruchi Sanghvi, Facebook's first female engineer, it happened in college. Running less than six minutes, the video promotes Code.org, a non-profit foundation created last year to boost computer programming education. "The first time I actually had something come up and say 'hello world,' and I made a computer do that, that was just astonishing," recalls Gabe Newell, president of video game studio Valve. But it's not just tech leaders promoting programming in the video. Chris Bosh, a Miami Heat basketballer, says about coding: "I know it can be intimidating, a lot of things are intimidating, but, you know, what isn't?" Code.org was founded by tech entrepreneur Hadi Partovi, an early investor in Facebook, Dropbox and the holiday rental site Airbnb. The organisation aims to address a problem often cited by tech companies - not enough computer science graduates to fill a growing number of programming jobs. The group laments that many schools don't even offer classes in programming. "Our policy is literally to hire as many talented engineers as we can find," Zuckerberg says in the video."The whole limit of the system is there just aren't enough people who are trained and have these skills today." ?" - http://au.news.yahoo.com/a/-/world/16250929/gates-zuckerberg-urge-kids-to-c… --- tom_a_sparks "It's a nerdy thing I like to do" Child of the Internet born 1983 Please use ISO approved file formats excluding Office Open XML - http://www.gnu.org/philosophy/no-word-attachments.html Ubuntu wiki page https://wiki.ubuntu.com/tomsparks

13 years, 4 months

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WTB: DEC Multia/UDB (DPS-75TB, 75.24 W) PSU

by marcogb＠xs4all.nl

Does anyone have a Delta Electronics DPS-75TB 75.24 W power supply unit, perhaps a spare one and willing to sell/trade it? To clarify, it's the one found in the Digital Multia/UDB, or the VX40 of mine at least. I may also be interested in a full Multia/UDB, maybe a VX41, or a gutted one even (as long as the PSU still works fine). I may also consider a similarly-sized DEC 3000. Thanks in advance. - MG

13 years, 4 months

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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

------------------------------ On Tue, Feb 26, 2013 3:42 PM PST Liam Proven wrote: >On 26 February 2013 23:33, Liam Proven <lproven at gmail.com> wrote: > >I don't know how that got sent half-done! Did you send it from a pi? >> To a child born in the developed world this century, the Web is part >> of life, always there at megabit speeds, as ubiq > >... as ubiquitous as air. Computers have GUIs, windows, taskbars etc, >and come with a web browser, as does even a cheap basic old phone or >pocket music player. Games are real-time 3D, even ones on a cheap 2- >or 3- generation old games console such as might be given to >preschoolers to play with. > >No, a BBC Micro or anything from the 1980s is not a suitable teaching >tool. It is a flint axe when the kids grew up with sliced bread. It is >a dugout canoe when grandad and grandma go yachting at the weekend. nobody uses flint axes. But they do fashion numerous tools and even build their own boats sometimes. >The mere idea is laughably unrealistic. > >If you are teaching a kid to drive, you don't teach them how to build >the car first. But the first drivers of cars needed to know a lot more about them if they wanted successful outings. You don't need to know a single thing about mechanics to drive. But to be a mechanic.you do need to know how to dismantle and reassemble a car. The "kids" already know how to "drive", turn on their computers and do basic tasks. What in the world does that have to do with anything. >If you're teaching them to maintain a car, you don't teach them how to >design and construct an engine first. Another analogy that doesn't quite seem appropriate. >So, no, actually, tools like BASIC and assembly code have no >relevance today, not really. Because the days when a BBC Micro was a >computer are so long ago that these kid's *parents* don't even really >remember them. I took a class and my first foray into BASIC was on an Atari 400 w/membrane k/b. Rest assured I will never forget. >A BBC Micro is not a computer any more, because it is 2013 now. People >live in space and have a Dynabook containing the entire Hitch-hiker's >Guide to the Galaxy in their pockets - it is normal for them to have >access to basically the entirety of human wisdom, wirelessly - because >even their parents don't remember phones that attached to *wires >coming out the wall* - because these are things so cheap that even the >kids in India and China are getting them now. You engaging in delusion. At least 1/2 of the US still maintain landlines, in addition to mobile phones. If you haven't been in a hurricane lately you may not be able to appreciate their utility when cellular networks crap the bed. >Assembly code is equivalent to how to chip a sharp arrowhead from a >piece of flint. Every flippin thing that runs on any computer in the world is running assembly instructions. Assembler or analysis thereof is NEVER going away. >BASIC is equivalent to learning how to smelt iron. LOL and how many groups and community colleges are engaging in that these days. If you're unaware foundry work has seen quite a resurgence in the last 15 years. And the point being you still and for a long time will need people who understand the rudimentary elements and processes that make up the tools we use every day. If for no other reason they just are curious. How ironic that just today I had an offline conversation about a 14 year old kid who's fixing CGA monitors for extra cash!!! >And the Raspberry Pi is a kids' computer that is cheaper than giving >them that old dusty Pentium 4 in the attic, because [a] you'd have to >get the P4 working again and install software on it, [b] it's a huge >noisy ugly piece of *office equipment* and not something a kid would >want to play with, and mostly because > >[c] The Raspberry Pi costs less to buy than the electricity used by >that P4 running every evening for a significant chunk of a year. But it doesn't teach bare fundamentals. That's the point everyone is trying to make it seems. >-- >Liam Proven ? Profile: http://lproven.livejournal.com/profile >Email: lproven at cix.co.uk ? GMail/G+/Twitter/Flickr/Facebook: lproven >MSN: lproven at hotmail.com ? Skype/AIM/Yahoo/LinkedIn: liamproven >Tel: +44 20-8685-0498 ? Cell: +44 7939-087884 >

13 years, 4 months

1
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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

------------------------------ On Tue, Feb 26, 2013 3:23 PM PST Dave wrote: >> Absolutely. I suspect for many people it appeals because it's a cheap computer, and they don't really have a particular use in mind for it (so it doesn't matter that it's rather middle-ground for so many situations). >> > >https://raspberryjamboree-es2001.eventbrite.com/# Being that at least it somewhat lends itself to general purpose computing, someone should devise a case, charging circuit, etc. that would facilitate the piecing together of a low cost portable/netbook, where more or less standard batteries, lcds, keyboards etc can be added.

13 years, 4 months

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RGB -> VGA adaptors (was: Re: Tek 4317)

by rampaginggreenhulk＠yahoo.com

------------------------------ On Tue, Feb 26, 2013 3:12 PM PST Mark Tapley wrote: >Some searching on the Color Computer site leads to this: > >http://miba51.com/CoCo_VGA_Adpater.html > >Roy Justus' converter from 15.7 kHz RGB as generated by a CoCo3 to 31 kHz VGA. >At one point, another was available from Chris Hawks > >http://permalink.gmane.org/gmane.comp.hardware.tandy.coco/63638 > >I have no experience with either, nor any connection except being a >fellow CoCo user. > >Hope this helps. Everyone is building scan doublers these days it seems. Princeton probably made the first one. Amiga had at least one flicker fixer, which is a bit different, the issue there being correcting interlaced video.

13 years, 4 months

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at least one of the best ways to learn computing was Re: Raspberry Pi

by rampaginggreenhulk＠yahoo.com

Ok ------------------------------ On Tue, Feb 26, 2013 2:59 PM PST Jim Stephens wrote: > >On 2/26/2013 1:42 PM, Chris Tofu wrote: >> I haven't looked at the pi much, besides reading an article some time ago somewhere. At first glance I can't see how it can help a person learn hardware. No clue on that one. >The way that it helps with education and learning is that instead of telling someone to go buy and dedicate a laptop or other machine to a lab purpose, and download say a DVD to load it one can tell them to obtain a Pi and an SD card image to boot it on. > >There are several examples of lab setups where this is already done both by attaching adapters to outside things (relay boards, etc.) and another which attaches to a breadboard. > >The pi is not going to be the focus of the vast majority of these things, but will be the computer vehicle that delivers the educational setup. > >It can be the center of a lesson say to learn to program things that require only what it has to interact with, keyboard, mouse an display, plus for the model b adding in a network. > >Instead of picking up $25 random ecycled machine this is intended to replace that role. Also if the need arises in the right setting it can be the focus of the lesson. I hear you. I never suggested it was useless, nor uninteresting. I find what I have learned about interesting myself. But as I stated in the other post it's not about h/w hacking as I define it, though it may be a valid very current use of the terms. >One suggested in these threads, "what not to plug into the gpio pins". Screwing up that lesson costs you another Pi. I suspect there will be people who will jump in and plug thing in randomly, but they won't get far. I suspect most people will figure out what to do with what is there. Ok. But blowing an IBM mainboard due to mishap could require a lot of chips LOL or maybe only a few.

13 years, 4 months

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at least one of the best ways to learn computing was Re: Raspberry Pi

by rampaginggreenhulk＠yahoo.com

Where are you anyway? Canada or US? What about a clone? I might be able to find you one of those. And you're totally w/i your rights to decline, just please don't because it ain't an IBeeMer. Even an Apple might be a possibility. I can't control shipping costs, USPS isn't too bad usually, but maybe for 20-30$ I could rustle you up something. Would ship from 07731 NJ. Point taken though. But for as many people that truly want to learn discrete h/w, there is always something available for 100-150$. And often much less. One of the coolest projects I've seen to date is the Radio Electronics RE Robot brain, 80188 based. I have everything - schematics, artwork, firmware images, even a contact (named Chris!) who built the whole robot. Gernsback used to have a bbs. What I wouldn't do for those archives. But at least I have all the raw materials, and a "revolutionary" new way of making pcb's _at_home_, that works all the time I'm told. And the project is at least somewhat tried and true,being it was an actual board manufactured by Vesta Technology, who's still around. Hey Jules, I have a dead 5160 mainboard with some weird wire routing going on. For shippage. ------------------------------ On Tue, Feb 26, 2013 2:53 PM PST Jules Richardson wrote: >On 02/26/2013 03:42 PM, Chris Tofu wrote: >> Apples and IBMs are somewhat plentiful. > >Hmm, I'd love to find an Apple II or an IBM 5150 (or '60, but I'm not too bothered about having a hard disk). I don't think there are any even remotely nearby though, which means shipping (and worse still, the possibility of ebay prices)

13 years, 4 months

1
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Raspberry Pi

by lproven＠gmail.com

On 25 Feb 2013 18:26, "Zane H. Healy" <healyzh at aracnet.com> wrote: > > The talk about the Acorn and RISC OS reminds me that I've been interested in one of these, primarily to run RISC OS. What is the recommended version, price, and place to get a Raspberry Pi from? > > I assume I want a "2.0 Model B 512Mb"? I've found a seller on eBay with this and they include a case for $57. If you want to keep it super cheap, try to find a Linux user upgrading to the 512MB version. 256MB is a vast amount of RAM for Risc OS, whereas it is not enough for a graphical Linux desktop. You really don't need half a gig for Risc OS, unless of course you want to run Linux as well.

13 years, 4 months

9
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RGB -> VGA adaptors (was: Re: Tek 4317)

by mtapley＠swri.edu

Some searching on the Color Computer site leads to this: http://miba51.com/CoCo_VGA_Adpater.html Roy Justus' converter from 15.7 kHz RGB as generated by a CoCo3 to 31 kHz VGA. At one point, another was available from Chris Hawks http://permalink.gmane.org/gmane.comp.hardware.tandy.coco/63638 I have no experience with either, nor any connection except being a fellow CoCo user. Hope this helps. At 16:39 -0600 2/26/13, <Sander> wrote: >Message: 12 >Date: Tue, 26 Feb 2013 13:29:38 -0700 >From: Richard <legalize at xmission.com> >To: cctalk <cctalk at classiccmp.org> >Subject: Re: Tek 4317 >Message-ID: <E1UAR9e-0000zT-PL at shell.xmission.com> > > >In article <201302260715.r1Q7FiJL027219 at ls-al.eu>, > Sander Reiche <reiche at ls-al.eu> writes: > >> Richard <legalize at xmission.com> wrote: >> > >> > I have other Tektronix hardware from this time frame and the video >> > output tends to be standard RGB (possibly synch-on-green) BNC >> > connectors. >> >> I'm still pursuing this, but it's taking its time. >> > > Are there any good converters for RGB? Like to VGA? > >Based on this picture, it appears that it would have RGB BNC connectors. ><http://user.xmission.com/~legalize/tmp/vintage/tektronix/xd88/20120417_1304…> > >That implies synch-on-green video signalling. If you don't have a >synch-on-green RGB monitor, then you'll need an adapter to convert >that to VGA (which splits the synch signals out on a separate pin). >These shouldn't be too hard to find because synch-on-green was fairly >common. >-- >"The Direct3D Graphics Pipeline" free book <http://tinyurl.com/d3d-pipeline> > The Computer Graphics Museum <http://computergraphicsmuseum.org> > The Terminals Wiki <http://terminals.classiccmp.org> > Legalize Adulthood! (my blog) <http://legalizeadulthood.wordpress.com> -- - Mark 210-379-4635 ----------------------------------------------------------------------- Large Asteroids headed toward planets inhabited by beings that don't have technology adequate to stop them: Think of it as Evolution in Fast-Forward.

13 years, 4 months

1
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OT: WWVB clock with silent movement

by aek＠bitsavers.org

We just went through another round of replacing battery clocks at the radio station and I've been going crazy trying to find one that is auto-set AND has a continous-sweep second hand. You can find a dozen Chinese manufacturers, but none in the US retail market.

13 years, 4 months

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at least one of the best ways to learn computing was Re: Raspberry Pi

by rampaginggreenhulk＠yahoo.com

This follows Tony's reply. I have little knowledge of DEC stuff and no knowledge of Beebs. I was sort of surprised that a PDP-8e's boot sequence is very similar to a peecee's, but this is fundamental to computers really, and this I had to learn. Apples and IBMs are somewhat plentiful. The Commie 64 has a bit too much custom logic, even a Mac has less in reality. Not a huge Apple II fan, but it seems to have little or none. A 5150 mainboard has zero custom logic, not even a pal unless I'm mistaken (and there's validity in the argument that a smidgeon of custom logic enhances learning - in that it would be a comprehensive example). There are undoubtedly many examples that would nicely fit the bill (and if you wanted to FORCE yourself to learn and delve into assembler and whatnot, get a Tandy 2000! It don't run squat, besides a handful of items that were modified for it, bizarro scientific and accounting packages. Zork. Hooray. Conspicuous by it's absence on the list is Starflight! Why - why WHY!!!). I haven't looked at the pi much, besides reading an article some time ago somewhere. At first glance I can't see how it can help a person learn hardware. No clue on that one.

13 years, 4 months

3
2
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Raspberry Pi

by rampaginggreenhulk＠yahoo.com

------------------------------ On Tue, Feb 26, 2013 1:21 PM PST Fred Cisin wrote: >On Tue, 26 Feb 2013, Tony Duell wrote: >> But I do wonder jhsut who the Rpi is aimed at. Given that you need a PC >> and its peripherals (keyboard, mouse, monitor) to use the Rpi, I wonder >> if it wouldn't be simpler jsut to install a free C compiler on said PC, >> at least to learn programming. > >'twould make sense. >A generic 5160 is a fine machine to learn certain stages of programming >on. > > >but, in wasteful cultures, like we have here, can pick up a eMachines or >Packard Bell on the curb on trash day, and use it to flesh out a Raspberry >Pi? You know there might be a burgeoning demand for old eMachins and PBells soon. Or perhaps some should design a sbc that could take their place.

13 years, 4 months

1
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OT: WWVB clock with silent movement

by tshoppa＠wmata.com

I think there was also an "Accutron" clock movement that could be driven from 60kHz. I think this movement was in at least some HP timekeeping instruments. In any event those were not truly silent either... put an Accutron up to your ear and you hear a high-pitched hum/buzz, not tick-tick-tick. -----Original Message----- From: Shoppa, Tim Sent: Tuesday, February 26, 2013 4:26 PM To: cctalk at classiccmp.org Subject: Re: OT: WWVB clock with silent movement Various "time-nuts" start off with GPS disciplined rubidium clocks, or radio clocks like WWVB, and derive a phase-locked 60Hz to run the old-fashioned 120VAC continuous-hand-movement analog and flip clocks (in my circle known as "NUMECHRON"s although I think the most applicable trademark was TYMETER). One example is: http://leapsecond.com/pages/atomic-nixie/ Obviously an HP 3325B is overkill as a 60Hz synthesizer but you get the idea. If you have WWVB carrier, 60Hz is just dividing by 1000, no funny numerator/denominator stuff.

13 years, 4 months

1
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