test-drb January 2012

test-drb@ccmp.vtda.org

201 participants
274 discussions

by fpersen2000＠yahoo.com

Greetings; Like many of you here I am an old time home computer guy who got his start in 1976 when I built my first computer, an Altair 8800. I am writing to get some information on a number of Dr Dobb's Journals that I wish to sell. I would like some input on what an honest price would be. I am also trying to determine if I should sell these one by one or in volume sets. I have the following: Volume number? Issue # 1??? ??? ???????????????? 1,3,6, 10 2????????????????????????? 1,2,3,4,5,6,7,8,9 3????????????????????????? 2,5,6,7,8,9,10 4?????????????????????????? 1,3,4,6,7,8,9,10 5?????????????????????????? 1,2,3,4,5,6,7,8,9,10 6?????????????????????????? 1,3,4,5,6,7,8,9,10,11,12 7??????????????????????????? 2 Your input would be appreciated.

12 years, 3 months

closures, FUNARGs, and lambdas [was RE: teaching programming to kids - Re: Looking for 8080/Z80 BASIC]

by RichA＠vulcan.com

From: Tony Duell Sent: Friday, January 27, 2012 1:21 PM [NB: Tony trimmed out the identities, so I'm not going to try to remember them.] >>> This is something I know nothign about either, and it would >>> certainly help _me_ if somebody could explain what lambda calculus >>> and 'closures' are useful for. >> The lambda calculus is useful in the same way that any theoretical >> discipline is useful. It does not itself solve problems; it informs > Actaully I think a lot of theoretical concepts were originally > develloped to solve particular real problems. They may well have other > applciations, of course. In point of fact, closures were often referred to in the early LISP literature as "FUNARGs" ("functional arguments"), and their existence went by the name "the FUNARG problem." There is a famous paper by Joel Moses of MIT entitled "The Function of FUNCTION in LISP, or Why the FUNARG Problem Should be Called the Environment Problem" which discusses them quite clearly using an ALGOL-style syntax for the non- LISP programming audience. Available at http://dspace.mit.edu/bitstream/handle/1721.1/5854/AIM-199.pdf The late John McCarthy has been quoted as saying that LISP is the way it is because of his misunderstanding at the time of the lambda calculus. Stop trying to understand the latter to understand LISP, and you'll be way ahead. Rich Alderson Vintage Computing Sr. Systems Engineer Vulcan, Inc. 505 5th Avenue S, Suite 900 Seattle, WA 98104 mailto:RichA at vulcan.com mailto:RichA at LivingComputerMuseum.org http://www.LivingComputerMuseum.org/

12 years, 3 months

Forlorn hope for a TRS-80 Reimplementation

by alhartman＠yahoo.com

The eBay seller never shipped the Model III I won on eBay after 11 days, so I requested a refund. I left negative feedback (his third in a year) and he got nasty. I told him that not shipping an item that was paid for wasn't deserving of any but negative feedback. He felt that not shipping the item and refunding m money was a positive transaction... *sigh!* Model III's and 4s are selling from between $400 and $2400 on eBay. These sellers are mad. I can't say how many Model III's I saw at the old TCF flea markets for $25.00, stacked 3 or 4 deep. Wish I had bought one... My Model I is still toast, and my LNW-80 is too big and heavy to setup and use given my tiny working space. If not for the need to read/write 5.25" floppies, I'd use a small footprint PC and an emulator. The only 5.25" USB solution (http://shop.deviceside.com/prod/FC5025) is read-only, It doesn't support TRS-80 Model I/III/4 formats in any event. I enjoy seeing all these classic computer re-implementations like Vince Briel's Replica I, or the DTV C-64 joystick... I wish someone would reimplement a TRS-80 Model I/III/4 in a chip, like the DTV. There's nothing special about the Model I really, other than maybe the WDC disk controller chip. The Model III is little different, it's only the Model 4 with Hi-res graphics and such where it gets more complicated. A fellow in Australia wrote to me years ago that he was working on one, but I never heard back from him. in the early 90's there was a board that basically replaced the Model I system board and put a full Model III in the case. It was called a "Trash Compactor." I wish I had bought one on those... If anyone knows of such a project, let me know. Or, if you know of a Model I, III or 4?(preferred in reverse order) in the mid-New Jersey area available for sale or trade at a price someone on a fixed income can afford. I would have thought SOMEONE would have made a universal USB to floppy drive adapter that one could use to add a 5.25" drive (or a 3.5") like all of the ATA/SATA adapters out there. I'll keep checking eBay for a machine, I found the LNW-80 (only a Model I, not the Model II which has CP/M and 80 columns) after searching a long time. So, I haven't given up hope. Thanks! Al Hartman Keansburg, NJ

12 years, 3 months

Fwd: Re: [GreenKeys] Model 33 For Sale (also 33 covers for sale)

by jfoust＠threedee.com

>From: Keelan Lightfoot <keelan at grenander.com> >Date: Thu, 26 Jan 2012 22:27:32 -0800 >To: Steve Ripper <steveripper at comcast.net> >Cc: "<GreenKeys at mailman.qth.net>" <GreenKeys at mailman.qth.net> >Subject: Re: [GreenKeys] Model 33 For Sale > >The vintage computer guys will be all over it, I'm sure. > >- Keelan > >On 2012-01-26, at 5:17 AM, "Steve Ripper" <<mailto:steveripper at comcast.net>steveripper at comcast.net> wrote: > >>Model 33 for sale in Wexford, PA. Starting bid at $79. Looks to be in very good condition and complete. >> >><http://tinyurl.com/7rs4q3l>http://tinyurl.com/7rs4q3l >> >>If someone in the group is going after this please let the others know. No sense in stepping on each other toes! >> >>Cheers, >> >>Steve Ripper >><mailto:steveripper at comcast.net>steveripper at comcast.net >><mailto:steve.ripper at gmail.com>steve.ripper at gmail.com >>248-787-0705 >><image002.jpg> >> Subject: [GreenKeys] Model 32/33 Covers - New X-BeenThere: greenkeys at mailman.qth.net X-Mailman-Version: 2.1.9 Precedence: list List-Id: "Discussion of older radio teletype $RTTY$ gear " <greenkeys.mailman.qth.net> List-Unsubscribe: <http://mailman.qth.net/mailman/listinfo/greenkeys>, <mailto:greenkeys-request at mailman.qth.net?subject=unsubscribe> List-Archive: <http://mailman.qth.net/pipermail/greenkeys> List-Post: <mailto:greenkeys at mailman.qth.net> List-Help: <mailto:greenkeys-request at mailman.qth.net?subject=help> List-Subscribe: <http://mailman.qth.net/mailman/listinfo/greenkeys>, <mailto:greenkeys-request at mailman.qth.net?subject=subscribe> Content-Type: multipart/mixed; boundary="===============1937634989737752974==" Sender: greenkeys-bounces at mailman.qth.net Errors-To: greenkeys-bounces at mailman.qth.net X-Spam-Status: No, score=-1.9 X-Spam-Score: -18 X-Spam-Bar: - X-Ham-Report: Spam detection software, running on the system "echo.gendns20.com", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: FYI: Someone on ebay is selling brand new covers for what I believe are the model 32/33 without the tape reader / punch. Asking $75 each and has more than 10 available. [...] Content analysis details: (-1.9 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (steveripper[at]comcast.net) -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] 0.0 HTML_MESSAGE BODY: HTML included in message -0.0 AWL AWL: From: address is in the auto white-list X-Spam-Flag: NO FYI: Someone on ebay is selling brand new covers for what I believe are the model 32/33 without the tape reader / punch. Asking $75 each and has more than 10 available. I have no connection or interest in this auction. <http://tinyurl.com/7u45ulj>http://tinyurl.com/7u45ulj Cheers, Steve Ripper

12 years, 3 months

My PDP11/23 arrived...

by bqt＠softjar.se

On 2012-01-24 05:34, allison<ajp166 at verizon.net> wrote: > Special note early RQDX2s must be in the last unoccupied slot, they do > not pass the > bus grant signals. As far as I can remember it's (only) the RQDX1 that have this problem, but it applies to *all* RQDX1. Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

12 years, 3 months

Identify: IBM memory

by pontus＠Update.UU.SE

Hi This link is making the rounds: http://gizmodo.com/5878645/this-giant-chunk-of-metal-is-4-kilobytes-of-memo… But what type of memory is it? Delay line, CRT tube, Drum? Bonuspoints if the machine can be identified :) Cheers, Pontus.

12 years, 3 months

looking for a Wombat or other Apple ][ clones or components

by chrism3667＠yahoo.com

The Wombat. In 1984 an Australia court sided against Apple (apparently the manufacturer copied their roms) stating there was no basis for copyright infringement because it wasn't a literary work LOL LOL LOL LOL

12 years, 3 months

looking to acquire a TI Business Pro

by chrism3667＠yahoo.com

Not a TI Professional, already have those. It's a 286 based tower. I have an old contact, but it belongs to an expired domain.

12 years, 3 months

Thank You All re Boot PROMs!

by mcquiggi＠sfu.ca

Thank you everyone for your replies! Thanks Pete, nice to see you still in the hobby! I see some other old names here too. Kevin Message: 13 Date: Thu, 26 Jan 2012 00:36:05 +0000 From: Pete Turnbull <pete at dunnington.plus.com> To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> Subject: Re: DEC Boot PROMs; Looking for Old PROM Programmer Message-ID: <4F209FF5.6090609 at dunnington.plus.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Kevin McQuiggin wrote: > I have been lurking for several years, although I was quite active in > the retrocomputing community before that. > > Work and other pleasures kept me a bit inactive until my retirement > last summer. Just coming up for air! Welcome back, Kevin! -- Pete Peter Turnbull Network Manager University of York

12 years, 3 months

Dimension 68000

by chrism3667＠yahoo.com

In the unlikely event someone has in their possession one of these, please send me a private email. And of all ironies, I need to know it's dimensions...

12 years, 3 months

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test-drb January 2012