PiDP11 Kit Build - Part 3 (of 4) Beige-o-Vision 2019-04-28 | This is the third in a series of four videos showing how to build a PiDP-11 kit. The PiDP-11 emulates the experience of running a 1970s mini-computer. The third video walks through finishing the kit's soldering. *Note, I've got the instructions backward at 1:38. First switch I put in goes down, the second switch goes up. However, the first from left goes up. This might just confuse some folks.- Part 1 covered the original PDP-11/70 this kit emulates. We'll also start the preparation work for the project.- Part 2 covered soldering the small passive component and LEDs. - Part 4 finishes the assembly and tests it all out. We reference a number of web pages in this video:- Getting the kit: obsolescence.wixsite.com/obsolescence/pidp-11-get-one- Kit building instructions: obsolescence.wixsite.com/obsolescence/pidp-11-building-instructions- The manual: www3.ispnet.net/pidp11/PiDP-11%20Manual%20v0.2.odt- The PiDP11 Forum groups.google.com/forum/#!forum/pidp-11- Some links to safe soldering practices safety.eng.cam.ac.uk/procedures/Soldering/soldering-safety learn.sparkfun.com/tutorials/how-to-solder-through-hole-soldering/all Check out our other social media accounts: - Instagram feed at instagram.com/beigeovision- Facebook feed at instagram.com/beigeOvision
Deeper into the HP 9845: Design and Internals Beige-o-Vision 2022-01-01 | We go under the covers to see how HP assembled its early workstation the 9845B. We’ll be looking at the assemblies and talking about the processor and some of the other innovations. Additional Information:- HP9845.net: The authoritative web resource- Hpmuseum.net: The standard reference for HP computing historyAcknowledgements:This video was made possible by with assistance from the National Museum of Computing (www.tnmoc.org).Photo Credits:- "World Map" by Just Because iCan via Flickr, licensed under CC BY 2.0- “Bill Eads,” Hewlett-Packard Journal, April 1978, page 11, (c) Hewlett Packard (fair use)- “Jack Walden,” Hewlett-Packard Journal, April 1978, page 11, (c) Hewlett Packard (fair use)- “QIC Tape” by Steffen Prößdorf, CC BY-SA 3.0 via Wikimedia Commons- “IBM 5100” by Sandstein, CC BY-SA 3.0 via Wikimedia Commons- “HP 9815A” by Florian Schaffer, CC BY-SA 4.0 via Wikimedia Commons- “DEC TU56” by ndiggity, CC BY-SA 3.0 via Wikimedia Commons- Cover, Hewlett Packard Journal, (c) April 1978 Hewlett Packard (fair use)- "Advanced Thermal Page Printer Has High-Resolution Graphics Capabilities" by Ray J. Cozzens, Hewlett Packard Journal, (c) April 1978 Hewlett Packard (fair use)Music:- “Komputo” by Francis Preve from the YouTube Audio LibraryCheck out updates and still photos from our other feeds:- Facebook @beigeOvision facebook.com/beigeOvision- Instagram instagram.com/beigeovision
Introducing the HP 9845: An Early Workstation Beige-o-Vision 2021-12-25 | In this video, we look one of the most exotic desktops of its day. The Hewlett Packard 9845 was a minicomputer shoehorned onto a desktop with a bunch of dedicated peripheral thrown in. This is an introduction to one of the coolest vintage computers we know. Additional Information:- HP9845.net: The authoritative web resource- Hpmuseum.net: The standard reference for HP computing historyAcknowledgements:This video was made possible by with assistance from the National Museum of Computing (www.tnmoc.org).Photo credits:- “The Sharp MZ-80K has got it all,” Byte Magazine, Nov. 1981, page 97, (c) 1981, Byte Magazine and Sharp, Inc.- “Learn how to use a computer for $249. And keep the computer,” Byte Magazine, June 1981, page 137, (c)1981, Byte Magazine and Sinclair Research- “Meet the HP Series 80,” Byte Magazine, June 1981, page 57, (c)1981 Byte Magazine and Hewlett Packard- Cover, Hewlett-Packard Journal, April 1978, (c)1978, Hewlett Packard- “The New Series 9800 System 45,” Hewlett Packard Journal, April 1978, Page 3, (c)1978 Hewlett Packard- Cover, Hewlett Packard Journal, December 1972, (c)1972, Hewlett Packard- “HP 9830A” by Hydrargyrum, CC BY-SA 3.0, via Wikimedia Commons- “IBM 5100” by Sandstein, CC BY-SA 3.0, via Wikimedia Commons- “WANG 2200” by StenSoft, CC BY-SA 3.0 via Wikimedia Commons- “Louis T. Shulte,” Hewlett Packard Journal, page 11, April 1978, (c)1978 Hewlett Packard- “Ansel K. Vogen,” Hewlett Packard Journal, page 11, April 1978, (c)1978 Hewlett Packard- “John C. Keith” Hewlett Packard Journal, page 11, April 1978, (c)1978 Hewlett Packard- Keith, John. C, Schultz, Louis T. And Vogel, Angel K., “System 45 Hardware Design”, Hewlett-Packard Journal, April 1978, page 11, (c)1978 Hewlett Packard- “1974 Chevy Malibu,” by Mr.choppers, CC BY-SA 3.0, via Wikimedia Commons- “1980 Chevy Malibu,” by dave_7 from Lethbridge, Canada, CC BY-SA 2.0, via Wikimedia Commons- “1980 Chevy C10,” by Riley from Christchurch, New Zealand, CC BY 2.0, via Wikimedia Commons- “Orion Brochure,” (c) 1982 Highlevel Computing Hardware- “Symbolics 3640,” by Michael L. Umbricht and Carl R. Friend Retro-Computing Society of RI CC BY-SA 3.0 via Wikimedia Commons- “XEROX Star 8020,” by vonguard CC BY-SA 2.0 cvia Wikimedia Commons- “XEROX Alto,” by Carlo Nardone from Roma, Italy CC BY-SA 2.0 via Wikimedia CommonsMusic:- “Komputo” by Francis Preve from the YouTube Audio LibraryCheck out updates and still photos from our other feeds:- Facebook @beigeOvision facebook.com/beigeOvision- Instagram instagram.com/beigeovision
A Look at HP’s Real-Time Executive Beige-o-Vision 2020-09-25 | A look at HP’s Real-Time Executive -- their minicomputer operating system for the 1000 Series computers. We’ll talk about how it came to be written, look at it’s history and then do a basic demonstration of what it’s like to use. The example system is the last version of RTE-A, running on an HP 1000 A600+.This is a long video so here are some links to jump around to different topics: Chapter Links-----------------------History 00:25 youtu.be/nWJoUVBR9CY?t=25Demonstration: - Startup 08:04 youtu.be/nWJoUVBR9CY?t=484- Getting help 09:21 youtu.be/nWJoUVBR9CY?t=561- Navigating around 09:41 youtu.be/nWJoUVBR9CY?t=581- Programming example 13:17 youtu.be/nWJoUVBR9CY?t=797- System management 18:30 youtu.be/nWJoUVBR9CY?t=1110Commands covered----------------------------------- DL (directory list)- WD (working directory)- LI (list file)- CO (copy) - PU (purge)- RN (rename)- EDIT (line editor)- WH (whatzat -- a process monitor)- FTN7X (FORTRAN 77 compiler)- LINK (program linker)- METER (CPU monitor)- IO (I/O configuration)- SAM (system area memory report)- EX (CI shell exit)Credits ------------Graphics:- Multics Logo -- Peter Flass / CC BY (creativecommons.org/licenses/by/4.0)- UNIX License Plate - By KHanger - Own work, CC BY 3.0, (commons.wikimedia.org/w/index.php?curid=6991712)Music:- “Sea Breeze Loop” by Joel Thomas Hunger, Zec Music Ltd, Licensed through StoryBlocks- “Komputo” by Francis Preve from the YouTube Audio LibraryReferences: -------------------- “Lord, what’s software?”, *MEASURE,* January 1969- Anzinger, G.A. and Gadol, A.M., "A Real-Time Operating System with Multi-Terminal and Batch/Spool Capabilities," *Hewlett-Packard Journal,* December 1975- Snow, David L. and Hahn, Kathleen F., “HP 1000 Operating System lsEnhanced Real-Time Executive,” *Hewlett-Packard Journal,* March 1977- *Real-Time Software: A Reference Text for Programmers,* Fourth Ed., HP 02116-9139, 1970- Diehl, Van and Fox, Kenneth A., “Introduction to Real-Time Operating Systems,” *Hewlett-Packard Journal,* December 1975- *Hewlett Packard [catalogue]: 1969 Electronic for Measurement, Analysis, Computation, Science,* Industry, Education, Hewlett Packard, 1969- *Hewlett Packard [catalogue]: 1970 Electronic for Measurement, Analysis, Computation, Science,* Hewlett Packard, 1969Links:----------- Cool Retro Term -- github.com/Swordfish90/cool-retro-term- HP Drive -- github.com/Swordfish90/cool-retro-term- HP Museum -- http://www.hpmuseum.net- The National Museum of Computing -- tnmoc.orgCheck out updates and still photos from my other feeds:- Facebook @beigeOvision facebook.com/beigeOvision- Instagram instagram.com/beigeovision
HP 1000 A600+ Vintage Minicomputer Introduction Beige-o-Vision 2020-07-28 | This is an introduction to the HP 1000 A-Series computers starting with one of the last of the series -- the A600+. It’s a 16-bit minicomputer from a long live family. We’ll have a quick look at the system and how it’s put together and what it’s for.Check out updates and teardown still photos from my other feeds:- Facebook @beigeOvision facebook.com/beigeOvision- Instagram instagram.com/beigeovisionPhoto Credits:- Telecom tower - "DSC00203.JPG" by Photo-matt is licensed under CC BY-NC 2.0- SES ASTRA Ground Station by MrOrangeflower is licensed under CC BY-SA 3.0- Atmosphere Conditioner by byzantiumbooks is licensed under CC BY 2.0- CSIRO ScienceImage 11137 Equipment at SynCat CSIROs Synfuel and Catalysis Research Facility by Darryl Peroni, CSIRO is licensed under CC BY 3.0- Dipole test rigs by Victor Engmark is licensed under CC BY-NC 2.0- 140-foot Control Room Upgrade by greenbankobservatory is licensed underCC BY-NC-ND 2.0- Inverkip Control Room by _gee_ is licensed under CC BY 2.0- Am2900 by Konstantin Lanze CC BY-SA References: - General Whetstone benchmark data http://www.roylongbottom.org.uk/whetstone%20results.htmHP performance data:- RTE-A Performance Brief A ~Series Automaters 5954-8733 June 1985- MIPS - HP 1000 A-Series Computer Handbook 5954-8590 Dec 1989
HP 85A: Power Supply Repair Beige-o-Vision 2019-09-22 | This is our second video on the HP 85A. This time we work on repairing its power supply. Props to CuriousMarc who's done the subject better -- but we had to fix this one anyway. So hey, excuse for a video right?Check out updates and teardown still photos from my other feeds:- Facebook @beigeOvision facebook.com/beigeOvision- Instagram instagram.com/beigeovisionMusic Credit:"Tomcat," Jason Donnelly (via Story Blocks)
HP 85A: A technical introduction Beige-o-Vision 2019-08-27 | This is a tour of the HP 85A desktop computer. It's the first in a short series looking the 85A, how to use and repair it. Props to CuriousMarc who's done the subject better -- but we had to fix this one anyway. So hey, excuse for a video right?The National Museum of Computing: www.tnmoc.orgCheck out updates and teardown still photos from my other feeds:- Facebook @beigeOvision facebook.com/beigeOvision- Instagram instagram.com/beigeovisionPhoto Credits:HP 9830A - Hydrargyrum, CC BY-SA 3.0 via Wikimedia Commons MOS 6502 -- Dirk Oppelt, CC BY-SA 3.0 via Wikimedia CommonsSinclair Spectrum Printer -- Jbattersby [Public domain] via Wikimedia CommonsMusic Credit:"Campus Life," Bruce Zimmerman (via Story Blocks)
NEC Versa V/50 Laptop Computer Technical Tour and Teardown Beige-o-Vision 2019-06-22 | This is a tour and teardown of the NEC Versa V/50 Laptop. This is a classic 486 notebook built to rock Windows 3.1. We'll talk about its history and look in detail at how it's built.Check out updates and teardown still photos from my other feeds:- Facebook @beigeOvision facebook.com/beigeOvision- Instagram instagram.com/beigeovisionPhoto Credits:NEC 2203 -- Don Debold 2011 (CreativeCommons v2.0)Western Electric Model 21 - Daderot (CreativeCommons)NEC 9801RX PC -- Flickr user - htomari (CreativeCommons v2.0)NEC Earth Simulator -- Manatee_tw -- (CreativeCommons v4.0)
IBM PC110 Palm Top Technical Tour and Teardown Beige-o-Vision 2019-06-10 | This is a tour and teardown of the IBM PC100 Palm Top / Laptop. It’s a little engineering gem. Built like a like a camcorder, it squeezes a full PC into a tiny brick. PC 110 Links _____________________________________________* Daniel Basterfield's Page http://www.basterfield.com/pc110/pc110idx.htm* Summarised version of the user guide web.archive.org/web/20071015140816/http://static.the-gadgeteer.com/pc110_manual.html* Amanda Walkers PC110 Page --web.archive.org/web/20040806190540/http://www.walker.reston.va.us:80/pc110* Marko Schuster's FAQ --web.archive.org/web/20090803195907/http://geocities.com/SiliconValley/Peaks/1559/pc110faq.htm* Vaughan Pratt’s PC110 as Industrial Art -- http://boole.stanford.edu/pc110.html* The Gadgeteer’s PC110 Page -- web.archive.org/web/20071010062703/http://static.the-gadgeteer.com:80/pc110.html* Linux on the PC110 -- https://pc110.ro.nu* Free BSD on the PC110 -- https://www.cs.cmu.edu/~awb/pc110.html* Howard Besser’s PC110 Page -- http://besser.tsoa.nyu.edu/impact/f96/Projects/vchen/pc110.htmCheck out updates and teardown still photos from my other feeds:- Facebook @beigeOvision facebook.com/beigeOvision- Instagram instagram.com/beigeovisionPhoto Credits:Atari Portfolio by Evan-Amos, Public Domain via Wikimedia CommonsSharp PC-3000 by 59bassman, CC BY-SA 3.0, via Wikimedia CommonsZeos Pocket PC by: I, DeeperThought, CC BY-SA 3.0 via Wikimedia CommonsHP 95LX by W. T. Shymanski, Public domain via Wikimedia Commons
Road Trip to the Living Computers: Museums + Labs Beige-o-Vision 2019-05-28 | Beige-O-Vision continues its roadtrip. This time we're visiting the Living Computers: Museum and Labs, in Seattle, Washington USA. LSSM Contact Info: Living Computers: Museum + Labs2245 First Avenue SouthSeattle, WA 98134livingcomputers.org/Join/Visiting-the-Museum.aspxCheck out our other social media accounts: - Instagram feed at instagram.com/beigeovision- Facebook feed at instagram.com/beigeOvision
Road Trip to the Large Scale Systems Museum Beige-o-Vision 2019-05-12 | Beige-O-Vision gallops through the galleries of the Large Scale Systems Museum in New Kensington, Pennsylvania. We'd like to thank Dave McGuire and the rest of the LSSM team for a very warm welcome. This first video is just a taster of what the LSSM offers. LSSM Contact Info: 924 4th Ave, New Kensington, Pennsylvania 15068facebook.com/lssmuseumCheck out our other social media accounts: - Instagram feed at instagram.com/beigeovision- Facebook feed at instagram.com/beigeOvision
PiDP11 Kit Build - Part 4 (of 4) Beige-o-Vision 2019-05-07 | This is the final part of the our series of four videos showing how to build a PiDP-11 kit. The PiDP-11 emulates the experience of running a 1970s mini-computer. The final complete's the build and walks through a basic functional test. - Part 1 covered the original PDP-11/70 this kit emulates. We'll also start the preparation work for the project.- Part 2 covered soldering the small passive component and LEDs. - Part 3 covered the switches and active components. We reference a number of web pages in this video:- Getting the kit: obsolescence.wixsite.com/obsolescence/pidp-11-get-one- Kit building instructions: obsolescence.wixsite.com/obsolescence/pidp-11-building-instructions- The manual: www3.ispnet.net/pidp11/PiDP-11%20Manual%20v0.2.odt- The PiDP11 Forum groups.google.com/forum/#!forum/pidp-11 Check out our other social media accounts: - Instagram feed at instagram.com/beigeovision- Facebook feed at instagram.com/beigeOvision
PiDP11 Kit Build - Part 2 (of 4) Beige-o-Vision 2019-04-27 | This is the second in a series of four videos showing how to build a PiDP-11 kit. The PiDP-11 emulates the experience of running a 1970s mini-computer. The second video walks through soldering the kits small components. - Part 1 covered the original PDP-11/70 this kit emulates. We'll also start the preparation work for the project.- Part 3 will cover the switches and active components. - Part 4 finishes the assembly and tests it all out. We reference a number of web pages in this video:- Getting the kit: obsolescence.wixsite.com/obsolescence/pidp-11-get-one- Kit building instructions: obsolescence.wixsite.com/obsolescence/pidp-11-building-instructions- The manual: www3.ispnet.net/pidp11/PiDP-11%20Manual%20v0.2.odt- The PiDP11 Forum groups.google.com/forum/#!forum/pidp-11- Some links to safe soldering practices safety.eng.cam.ac.uk/procedures/Soldering/soldering-safety learn.sparkfun.com/tutorials/how-to-solder-through-hole-soldering/all Check out our other social media accounts: - Instagram feed at instagram.com/beigeovision- Facebook feed at instagram.com/beigeOvision
PiDP11 Kit Build - Part 1 (of 4) Beige-o-Vision 2019-04-14 | This is the first in a series of four videos showing how to build a PiDP-11 kit. The PiDP-11 emulates the experience of running a 1970s mini-computer. In the first video we'll talk about the original PDP-11/70 this kit emulates. We'll also start the preparation work for the project. - Part 2 will cover soldering the small passive component and LEDs. - Part 3 will cover the switches and active components. - Part 4 finishes the assembly and tests it all out. We reference a number of web pages in this video:- Getting the kit: obsolescence.wixsite.com/obsolescence/pidp-11-get-one- Kit building instructions: obsolescence.wixsite.com/obsolescence/pidp-11-building-instructions- The manual: www3.ispnet.net/pidp11/PiDP-11%20Manual%20v0.2.odt- Download for Raspian: raspberrypi.org/downloads/raspbian- Download for the PiDP-11 software: www3.ispnet.net/pidp11/pidp11.tar.gz- Download for the guest OSes: www3.ispnet.net/pidp11/systems.tar.gzCheck out our other social media accounts: - Instagram feed at instagram.com/beigeovision- Facebook feed at instagram.com/beigeOvisionAcknowledgements:This video was made in association with The National Museum of Computing (www.tnmoc.org). Many of the machines shown are from the museum's collection. Please help support their great work, and go for a visit. Images Credits:Commodore Pet by Marcin Wichary [CC], via Wikimedia CommonsApple ][ Plus by Kozan [Public domain], via Wikimedia CommonsKen Thompson and Dennis Richie at a PDP-11, by Peter Hamer [CC BY-SA 2.0], via Wikimedia CommonsA PDP-11 at NASA, by NASA [Public domain], via Wikimedia Commons
Toshiba 610CT Portege Technical Tour and Teardown Beige-o-Vision 2019-03-17 | This is a tour and #teardown of the Toshiba 610CT Portege. It’s a little engineering gem of a vintage laptop, not unlike the one in my first teardown (youtu.be/ulYT60wqu5o). In 1995 it shoved one of the first Pentiums into a sub-notebook box. Check out updates and teardown still photos from my other feeds:- Facebook @beigeOvision facebook.com/beigeOvision- Instagram instagram.com/beigeovisionPhoto Credits:Toshiba 2150 by Aschroet [CC0] via Wikimedia Commons
HP Omnibook 800CT Vintage Computer Technical Tour and Teardown Beige-o-Vision 2019-03-03 | This is a technical tour and #teardown of the unusual HP 800CT vintage laptop. I'd forgotten I even had the thing until recently. Now I've dug it out, dusted it off, and done a video to share with you. The machine dates from 1996. It's remembered, for its pop-out mouse. It was part of the sub-notebook market segment. Let see if there's any life left in it, and perhaps find out how it's put together.Check out updates and still photos from my other feeds:- Facebook @beigeOvision facebook.com/beigeOvision- Instagram instagram.com/beigeovisionPhoto Credits:Fax Machine by ChtiTux (commons.wikimedia.org/wiki/User:ChtiTux) Licensed under Creative Commons (creativecommons.org/licenses/by-sa/4.0/deed.en)Apple MacBook Air by Rüdiger Müller (commons.wikimedia.org/wiki/User:Rm1911) Licensed under Creative Commons (creativecommons.org/licenses/by-sa/4.0/deed.en)
Vintage Computer Racing: Leibnitz Pi Estimation: Elliott 903 Beige-o-Vision 2017-06-28 | Race 1. Leibnitz Pi Estimation, run on an Elliott 903 running ALGOL 603 PlacesF (dividing factor) = 3375W (working estimate) = 3.141Time = 52.330 seconds
Vintage Computer Racing: Leibnitz Pi Estimation: Elliott 903 FAILED Run Beige-o-Vision 2017-05-16 | Race 1. Leibnitz Pi Estimation, run on an Elliott 903 using BASIC. -- FAILEDHad problems recording this one, but thought I'd share it anyway as there were a couple of folks interested to see it.2 PlacesF (dividing factor) = 237W (working estimate) = 3.15 -- wrong!Time = 62.160 seconds
Vintage Computer Racing: Leibnitz Pi Estimation: Psion 3A Beige-o-Vision 2017-05-15 | Race 1. Leibnitz Pi Estimation, run on an Psion 3a using OPL.youtube.com/watch?v=XKNw3AOJqHY4 PlacesF (dividing factor) = 21587W (working estimate) = 3.14150000952847Time = 66.200 secondsProgram Listing :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::PROC leibn: LOCAL w, f, t, p, st, se, e w = 0.0 f = 1.0 PRINT “Number of places? “, INPUT t s = 10**t p = int(3.14159265359*s) PRINT “Calculating Pi to “,t,” places” st = MINUTE * 60 + SECOND w=w+4.0/f WHILE 1 f = f + 2 w = w - 4.0 / f IF int( w * s) = p break ENDIF f = f + 2 w = w + 4.0 / f IF int( w * s ) = p break ENDIF WENDWHfinish:: e = MINUTE * 60 + SECOND – st PRINT “Done. “, e,” seconds “, int(f),w GETENDP::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
Vintage Computer Racing: Race 1 - Leibnitz Pi Estimation Beige-o-Vision 2017-05-14 | Come one, come all! Submit your race entries in a vintage computer race.Event details on Facebook (public): facebook.com/events/120015135223427Our first race! This one's a bit like a stock car race. You're going to go round and round in circles. Estimate Pi using a Leibnitz series. Here's some background: en.wikipedia.org/wiki/Leibniz_formula_for_πCompete by choosing the number of digits of precision you can estimate Pi to in 5-minutes, using this method. The series converges. You reach the finish when you match your digits. For instance, the first time you return a number containing 3.14 you complete two places. Link or embed a video here or against the YouTube site. Provide: A. Value of the divisor at the end of your lapB. The full value of your working estimate at the end of your lapC. Your time, either taken internally or from video timecodeD. Your program listingWe'll report entries by based on the system type, and code language. The results will be reported straight and leveled for clockrate.Here are some sample programs you can just cut and paste. Remember BASIC has lots of subtle dialects, with different default numeric types.PYTHON:# * Sample implementation of Leibnitz Series Pi Estimation# - Change starting value of 't' to set target places# * Variables# - 'w' is the current value of the working estimate# - 'f' is the current value of the incrementing factor# - 'p' is the Pi based comparitor (left shifted)# - 's' is the shifting factor# - 'two' is a float containing 2 # - 'four' is a float containing 4import mathimport timet = 3w = float(0.0)f = float(1.0)s = pow(10,t)p = math.floor(math.pi * s)two = float(2.0)four = float(4.0)start_time = time.time()print("Calculating Pi to "+str(t)+" places ")w = w + four / f# * /OPTIONAL/ Running output showing current state of the calculationprint(str(f) + " " + str(w))# To disable comment the previous line or delete all three.while( True ): f = f + two w = w - four / f # * /OPTIONAL/ Running output showing current state of the calculation print(str(f) + " " + str(w))# To disable comment the previous line or delete all three. if math.floor(w*s) == p: break f = f + two w = w + four / f # * /OPTIONAL/ Running output showing current state of the calculation print(str(f) + " " + str(w) )# To disable comment the previous line or delete all three. if math.floor(w*s) == p: break end_time = time.time()print("Done. time(s)=" + str( end_time - start_time ) + " f=" + str(int(f)) + " w=" + str(w))===========================================BASIC SAMPLE1 REM * SAMPLE LEIBNITZ SERIES PI ESTIMATION2 REM - CHANGE LINE 40 TO SELECT TARGET PRECISION3 REM * VARIABLES4 REM - W IS THE WORKING VALUE OR CURRENT ESTIMATE5 REM - F IS THE FACTOR BEING INCREASED BY TWO 6 REM - P IS A STATIC VARIABLE CONTAINING PI7 REM - T IS THE TARGET DIGITS OF PRECISION8 REM - S IS THE SHIFT FOR COMPARISON10 LET W=0.020 LET F=1.040 LET T=350 LET S=10^T50 LET P=INT(3.141592653589793*S)60 PRINT "CALCULATING PI TO "T" PLACES"70 LET W=W+4.0/F71 REM * /OPTIONAL/ RUNNING OUTPUT SHOWING THE CALCULATION STATE72 PRINT F" "W" "P73 REM COMMENT LINE 72 OR DELETE 71-73 IF OUTPUT IS NOT REQUIRED80 LET F=F+2.090 LET W=W-4.0/F91 REM * /OPTIONAL/ RUNNING OUTPUT SHOWING THE CALCULATION STATE92 PRINT F" "W" "P93 REM * COMMENT LINE 92 OR DELETE 91-93 IF OUTPUT NOT REQUIRED100 IF INT(W*S)=P THEN GOTO 150110 LET F=F+2.0120 LET W=W+4.0/F121 REM * /OPTIONAL/ RUNNING OUTPUT SHOWING THE CALCULATION STATE122 PRINT F" "W" "P123 REM * COMMENT LINE 112 OR DELETE 111-113 IF OUTPUT NOT REQUIRED130 IF INT(W*S)=P THEN GOTO 150140 GOTO 80150 PRINT "DONE "F" "W" "P151 REM * TIMING 152 REM - WILL START WITH THE APPEARANCE OF THE FIRST OUTPUT LINE153 REM - WILL END WITH THE APPEARANCE OF THE LAST OUTPUT LINE OR 'DONE'154 REM WHICHEVER IS FIRST160 END
Vintage Computer Racing: Leibnitz Pi Estimation: Osborne One Beige-o-Vision 2017-05-14 | Race 1. Leibnitz Pi Estimation, run on an Obsborne One using MS Basicyoutube.com/watch?v=XKNw3AOJqHY3 PlacesF (dividing factor) = 3375W (working estimate) = 3.141000937665276Time = 82.100 seconds
