test-drb February 2013

test-drb@ccmp.vtda.org

185 participants
407 discussions

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

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

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

Raspberry Pi

by barythrin＠gmail.com

Anyone know if mcm electronics changes the shipping charge before you pay or are they all flat rate/minimum of 9.49 to ship? Between them charging extra for shipping and adafruit charging extra for the device but admitting shipping is only $4 it sorta comes out the same. I just don't know who I'd offer the mark up (if I have to pay one) to.

13 years

OT: WWVB clock with silent movement

by tshoppa＠wmata.com

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

Tek 4317

by seefriek＠gmail.com

On Tue, Feb 19, 2013 at 1:00 PM, Sander Reiche <reiche at ls-al.eu> wrote: > > I was wondering about the Tektronix 4317 machine. The only information I'm > able to find online is the catalog introducing it: > http://bitsavers.informatik.uni-stuttgart.de/pdf/tektronix/\ > 44xx/4300_Series_1988_Catalog.pdf > The rest inside that bitsavers PDF (or Bits corner for that matter) don't > even > mention the 4300 series. > Wow...what a great machine. I spent some time with Smalltalk on one in the before-times. Really advanced, well made little box for the time (and expensive). > I gather it should run UTek 3.1, but where could I try to find the media > (which > is 5.25" floppy I think) for that O/S? > I'm afraid I don't know what the last UTek was for that box, but 3.1 is a reasonable guess. UTek did come on QIC tapes (which is what we used); I never loaded it from floppies or saw a floppy distro. That said, most of my UTek stick time was on later versions and later hardware (XD88 workstations). I can't imagine where one would find the install media these days other than lucking onto someone with a similar machine. I vaguely recall that all 4xxx machines could be loaded from the same distro media, but I can't confirm that. That said, if you do find someone with a working system, you could clone the drives. They're SCSI, and 'dd' just fine. > Does anyone know of the connections which can be made on such a machine? > Not sure exactly what you mean by "connections", but I'm pretty sure the one we had had ethernet, serial, PIO, and SCSI. And the video output of course. Good luck with it. I'd love to have one running Smalltalk and/or Lisp. KJ

13 years

PANASONIC HHC RL-H1800 TV DISPLAY ADAPTOR

by n8uhn＠yahoo.com

RE:PANASONIC HHC RL-H1800 TV DISPLAY ADAPTOR Thankx all for the info and help with my HHC questions. i did win the ge programmer with working HHC on ebay for around 50 dollars. so now i have an hhc with working display and some GE spares. Tony my answers to your post is below: >Waht exactly is the fault with the existing one? Missing columns? Missing >rows (over part of the display?) Odd dots missing? Missing row's on the last third of the display almost to the end of te display. >The only HHC peripheral I ahve seen is the printer/cassette interface and >tht contains a ROM and a custom I/O chip. I would be very suprisied if >the display interface was all standard ICs. there were a few hhc peripheral's besides the tv adaptor and printer. according to my manual that came with the hhc used in the ge programmer there was: the I/O adaptor for six peripheral's, two printer's with cassette i/o on them , an acoustic coupler modem and a ram module. Ge used two modules with the hhc/printer/io adaptor setup: one module held eproms for software that programed the ge two way radios and the other module interfaced the radio's to the hcc via cable or ZIF sockets for bare eeproms. google "ge suitcase programmer" for info on the GE/HHC setup. there was one other HHC set up that used only an HHC and printer for insurance companies - the printer attached directly to the HHC and the custom insurance software was on a "capsule" (rom chip) that went in the back of the HHC. Bill

13 years

VMS 6 docs

by reiche＠ls-al.eu

Hi all, The orange binders are spoken for. But the large paperback books are still available. Rob Jarratt has expressed his interest for the VMS 4 documentation, but as said, that's gone. Anyone interested or can I bin it? http://ls-al.eu/~reiche/log/index.html?id=2013020601 re, reiche

13 years

Raspberry Pi

by barythrin＠gmail.com

That's where ya pick the right project for you (nv8em not a raspberry) :-) ------Original Message------ From: Jules Richardson Sender: cctalk-bounces at classiccmp.org To: cctalk at classiccmp.org ReplyTo: General Discussion: On-Topic and Off-Topic Posts Subject: Re: Raspberry Pi Sent: Feb 26, 2013 8:36 AM On 02/25/2013 04:45 PM, Tony Duell wrote: > There are, IMHO, 3 thigns wrong with the Rpi. The hardwre, the software, > adn the docuemtnion. I think my main problem with it is that I'm tainted by nostalgia, and what I really wish it was is a backplane system with separate cards for ROM, RAM, CPU, I/O, video etc. :-) Much more fun to mess around with, put into a cool-looking chassis, use to teach kids about how a computer works etc. cheers Jules

13 years

Commodore 1084s

by rampaginggreenhulk＠yahoo.com

Compatible with IBM CGA modes? Same pinout? As to a related topic, the C128 outputs RGBI like a CGA card?

13 years

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test-drb February 2013