C64 issue with Keelog power supply high AC output voltage Dr. Daves Diversions 2020-10-12 | UPDATE, 6 Mar 2021: I've solved this problem. My current best approach to suggest is to use the Electroware C64 PSU(s). They supply a more correct AC voltage, unmodified.Details here: "Electroware C64 PSU heavy-duty mod (30W DC power)" (2 Dec 2020)youtube.com/watch?v=daE0QzkroB8UPDATE, 9 Nov 2020: I received an email from Keelog acknowledging the problem and, "offer returning the product for a refund (and perhaps shipping another one once we have this problem under control)." I find this reasonable. See the comment for details.UPDATE, 16 Oct 2020: I installed a heatsink on the voltage regulator (VR2) to accommodate the high AC output voltage (11+ volts) of the Keelog power supply. See the comment for more details.In this video: I demonstrate some debugging of a screen-glitching/crash/reset problem I'm experiencing with my Commodore 64 (motherboard ASSY 326298 REV A (c) 1982) when using a Keelog power supply (c64dual PSU model PSUC64DMGRUS) to replace my original Commodore power supply (1983). My C64 works fine with the original Commodore PSU.Temperatures reported in the video are degrees Fahrenheit.Please let me know your thoughts about how I might solve the problem.I wrote Keelog 12 Oct 2020, via email, inquiring how we might solve the problem.Related:TheRetroChannel's Commodore 64 Keelog replacement power supply review: youtube.com/watch?v=eJ9nWh_k_J8(Similar high AC output voltage measurement at 9m12s: youtube.com/watch?v=eJ9nWh_k_J8#t=9m12s )iz8dwf (Frank) working on a similarly early motherboard:youtube.com/watch?v=IVvI998PWGERavenWolf Retro Tech does an excellent job showing how the C64 routes and uses its power, at 2m15s:youtube.com/watch?v=kAAnxC8iqmE#t=2m15s
Window[s] cleaning an HP G62 Notebook PC (2011) that is now running Linux-based Porteus Kiosk. Dr. Daves Diversions 2024-02-05 | ...
C64 online software jukebox! Ultimate II+ Assembly64 support Dr. Daves Diversions 2024-01-02 | Demonstration of the Commodore 64 as online [game] software jukebox! ... with the Ultimate II+ latest firmware's Assembly64 support.ultimate64.com/Firmwarehttps://assembly64.hackerswithstyle.se/assembly/Untrimmed original video here:youtu.be/uqZ-I4oiK0EShout out to Matt @retrobitstv turning me on to this new firmware released Dec. 28 2023!youtube.com/live/QPYBGaRYCTMRay @CallousCoder also published a video on it!youtu.be/CgzNg305L2YGideon (creator of the Ultimate II+, Ultimate 64, etc.) is a legend. :)
C64 online software jukebox! Ultimate II+ Assembly64 support (the LONGER short) Dr. Daves Diversions 2024-01-02 | Demonstration of the Commodore 64 as online [game] software jukebox! ... with the Ultimate II+ latest firmware's Assembly64 support.ultimate64.com/Firmwarehttps://assembly64.hackerswithstyle.se/assembly/This is a slightly longer version of the similar short I dropped simultaneously; this one has some personal context and not such annoyingly choppy editing... well, this has no editing. :)Shout out to Matt @retrobitstv for turning me on to this new firmware released Dec. 28 2023!youtube.com/live/QPYBGaRYCTMRay @CallousCoder also published a video on it!youtu.be/CgzNg305L2Y
Lemon & the Deadliners - Blast from the Past! - Amiga Demo, 2017 (B2000/68040/ZZ9000) Dr. Daves Diversions 2023-10-28 | Here is the demo called "Blast from the Past" by Lemon & the Deadliners (2017) as run on my Amiga 2000 having Fusion Forty (68040@25MHz) accelerator and MNT ZZ9000 graphics card. It was recorded using my MacBook Pro with Amiga outputs captured simultaneously with two HDMI connections to USB: one for video, another for stereo audio using a RetroTink 2X-Pro.This demo can be found elsewhere on YouTube, of course. I'm publishing it here to capture how it can be configured to run on my Amiga 2000 with Fusion Forty on (68040@25MHz), MNT ZZ9000 de-interlacer.As far as I can tell, it seems to run the same, here, as on a stock Amiga with 68000.It glitches and/or crashes my machine if I leave CopyBack or the Data Cache on.Compare to what is presumably standard 68000 speed here:youtu.be/YYeTp_Ywtg0
Ghostown - Richie on the Moon - Amiga 40K Intro, 2017 (B2000/68040/ZZ9000) Dr. Daves Diversions 2023-10-28 | Here is the demo/intro called "Richie on the Moon" by Ghostown (2017) as run on my Amiga 2000 having Fusion Forty (68040@25MHz) accelerator and MNT ZZ9000 graphics card. It was recorded using my MacBook Pro with Amiga outputs captured simultaneously with two HDMI connections to USB: one for video, another for stereo audio using a RetroTink 2X-Pro.This demo can be found elsewhere on YouTube, of course. I'm publishing it here to capture how it can be configured to run on my Amiga 2000 with Fusion Forty on (68040@25MHz), MNT ZZ9000 de-interlacer.Portions of it run faster, here, than on a stock Amiga with 68000. For instance, the striped horizontal bars/tubes, toward the end, appear to move side-to-side markedly faster.Compare to what is presumably standard 68000 speed here:youtu.be/csOwec-tGik
Modern Commodore USB keyboard with RGB LED Dr. Daves Diversions 2023-05-03 | This is my current daily driver USB keyboard:* Vintage Commodore C16 Mitsumi hybrid mechanical keyboard (1984 surplus, bought for $5.95 from Radio Shack in the '80s) deskthority.net/wiki/Commodore_16* Modern 64C case from Individual Computers (original.Commodore molds) https://icomp.de/shop-icomp/en/shop/product/c64c-case.html* Adafruit KB2040 microcontroller running CircuitPython code by Jeff Epler: learn.adafruit.com/commodore-keyboard-to-usb-hid-with-circuitpython Modified to run, essentially, the Happy Hacking keyboard ANSI layout: hhkb.io/layout and RGB colorwheel in the POWER LED position: docs.circuitpython.org/en/latest/shared-bindings/rainbowio
New Tank Mouse: some are scrolling randomly Dr. Daves Diversions 2023-04-24 | I gladly backed the Tank Mouse on Kickstarter and am happy to say I've received two of them, based on the level I backed the project. I've been testing them a few days and one is working nicely for me, wirelessly via USB with my MacBook Pro. The other exhibits the known random touch scrolling problem, that others have reported and about which backers have been informed via Kickstarter updates.Tank Mouse - your new Amiga mousekickstarter.com/projects/lukas-remis/tank-mouse-your-new-amiga-mouseIn this short I share what the symptom of the problem looked like for me for and that Lukas, who runs the Kickstarter, will replace a Tank Mouse with this problem. He has a replacement on its way to me and I'm sending the problem one back to him.UPDATE 2023-MAY-12: I received the replacement mouse from Lukas on May 6, in the U.S.,, two weeks after he mailed it from Poland. The replacement is working correctly.
Clicky Keebs: IBM Model M vs. Everex Enhanced Dr. Daves Diversions 2023-01-21 | In this video I share the clicky typing on 1993 IBM Terminal Model M and 1993 Everex Enhanced keyboards.The Model M has a Soarer's USB HID converter (based on the discontinued Teensy microcontroller) and the Everex is connected using tinkerBOY's USB HID converter (current as of 2023):https://www.tinkerboy.xyz/product/tinkerboy-xt-at-usb-converter-with-soarers-converter-firmware/
You Cant DIY All Day (If You Dont Start in the Morning) Dr. Daves Diversions 2022-11-14 | I repair the broken plastic tab(s)/pin(s) on the compartment lid (for pre-ground coffee) on our Gaggia Anima automatic coffee machine by replacing with solid copper wire (14 AWG)... too early in the morning.
Honeywell Radiator Circuit Board Repair and Fault Determination Dr. Daves Diversions 2022-09-18 | In this video, I share the repair of a Honeywell-branded portable, electric, digitally-controlled, oil-filled radiator, Model: HZ-709.The failure symptom was simply that it would no longer turn on. It seems that its circuit board was cracked during a move to a new home, so I replace the damaged components and repair the broken traces to get it in working order again and identify a design weakness.00:00 intro02:03 teardown/disassembly and finding the failure07:33 on the bench, review of the PCB repairs13:43 second try (finishing the repair)16:00 discussing the design problemRelated:Repairing broken traces on a circuit board (Branchus Creations)youtube.com/watch?v=ref9JHUf-uwHow to Repair a Cracked or Broken Circuit Board (The Lightning Stalker)youtube.com/watch?v=g6_piarjTKIRepairing a Minor Crack On A Circuit Board PCB. Fix Repair Printed Circuit Board (NorCal715)youtube.com/watch?v=daDYTK0PIX0Honeywell Oil Radiator Heater Wouldn't Turn On. (Very) Easy Fix! (Measure Once Cuss Twice)youtube.com/watch?v=g2P0bl_1nx0
Playing with the 1976 Fairchild Channel F at VCF Midwest! #VCFMW #VCFMW2022 Dr. Daves Diversions 2022-09-13 | Eric shows us his Fairchild Channel F Video Entertainment System - the cartridge and CPU-based game system that beat the Atari 2600 VCS to the punch!Related:Fairchild Channel F (wikipedia)en.wikipedia.org/wiki/Fairchild_Channel_FFairchild F8 (wikipedia)en.wikipedia.org/wiki/Fairchild_F8
Modern TTL-only Computers at VCF Midwest! #VCFMW #VCFMW22 Dr. Daves Diversions 2022-09-12 | Alastair Hewitt introduces us to two computers that he built using only TTL logic, implementing processing and arithmetic functionality plus video: the Novatron and the Novasaur, based on the Gigatron.These kits, expected late 2022 (see link below), are essentially full featured home computers that run games and even CP/M.Related:Novasaur TTL Computer Sets the Bar (Hackaday.com)hackaday.com/2021/10/25/vcf-east-2021-novasaur-ttl-computer-sets-the-barNovasaur: Retrocomputer's TTL-Only Design Emulates the Intel 8080 Processor (Hackster.io)hackster.io/news/novasaur-retrocomputer-s-ttl-only-design-emulates-the-intel-8080-processor-afe7712e29dfNovasaur CP/M TTL Retrocomputer (Hackaday.io)hackaday.io/project/164212-novasaur-cpm-ttl-retrocomputerHow the Gigatron TTL Microcomputer Works (Hackaday.com)hackaday.com/2019/03/25/how-the-gigatron-ttl-microcomputer-worksGigatron I/O and RAM expander (Hackaday.io)hackaday.io/project/164176-gigatron-io-and-ram-expanderThe Gigatron TTL microcomputergigatron.ioSolid State Machines (Alastair's site; kits expected to be available late 2022)solidstatemachines.com
Tandy Radio Shack TV Scoreboard Composite Mod and HDMI #SepTandy 2022 #VCFMidwest2022 Dr. Daves Diversions 2022-09-06 | In this video we modify the Radio Shack Electronic TV Scoreboard, a first-gen video game console from the '70s, to output composite video, and use a RetroTINK-2X Pro to play pong -- and hockey -- on a modern HDMI screen.Related:THE VINTAGE COMPUTER FESTIVAL MIDWEST (vcfmw.org)http://vcfmw.orgCOMPOSITE VIDEO MOD V2.1 - ATARI 2600/7800 (TFW8b.com)thefuturewas8bit.com/atari-composite-video-mod.htmlOdyssey2 DELUXE AV Mod (The Taylor and Amy Show)youtube.com/watch?v=DUT7NaYnOhYRetroTINK-2X Pro (retrotink.com)retrotink.com/product-page/retrotink-2x-proTinyCOMP – Universal RF to Composite Mod (jcm-1.com)jcm-1.com/product/tinycomp#SepTandy 2022 - Tandy Coco 1 RF to Composite and audio mods with TinyComp for less than $20 (Rudy's Retro Intel)youtube.com/watch?v=GXVS1jthHkcTinyComp the RF TV output converter to Composite (Rudy's Retro Intel)youtube.com/watch?v=g0BHWYaiiIkInside a 1st gen Pong TV video game experience (Dr. Dave's Diversions)youtube.com/watch?v=HCZiJYoOOWETandy Electronic TV Scoreboard - #SepTandy - #SepTandy2021 (CRG channel)youtube.com/watch?v=Q6m-mhLbPe0Frank's 3D shopyoutube.com/c/Franks3DshopFrank's Playgroundyoutube.com/channel/UCGWc3-CisXiKtmjRUpL1fVQGIMINI (1978 General Instrument Corp.) AY-3-8500/8600http://www.pong-story.com/GIMINI1978.pdfPhilips 2000T Composite Video Modhttp://blog.worldofjani.com/?p=6288http://blog.worldofjani.com/wp-content/uploads/2021/05/P2000_tfw8b.jpgPhilips Videopac G7000 Composite Video Mod (worldofjani.com)http://blog.worldofjani.com/?p=6438Binatone TV Master MK 4 Composite Video Modpetervis.com/gallery/Toys_and_Games/binatone-tv-master-mk-4-composite-video-mod/binatone-tv-master-mk-4-composite-video-mod.htmlold-computers.com/museum/computer.asp?c=1037&st=3Amiga2MacFloppy (github.com)github.com/Franks3dShop/Amiga2MacFloppyAmiga2MacFloppy (pcbway.com)pcbway.com/project/shareproject/Amiga2MacFloppy.htmlFloppy Emu Disk Emulatorbigmessowires.com/floppy-emu
Star Wars: The Arcade Game on Amiga! Dr. Daves Diversions 2022-05-30 | This is Star Wars: The Arcade Game on the Amiga as I played it c. 1990.Here, celebrating the 45th anniversary of Star Wars (movie) release, on my Amiga 2000 with 68040 and recorded via HDMI in stereo using the Retrotink 2X-Pro and an Amiga video (DB23) to Components (YPbPr) adapter by Retronic Design.
Macintosh Mouse Practice for #MARCHintosh2022 Dr. Daves Diversions 2022-03-12 | In this video I share a session of Mouse Practice, released by Apple in 1992. Created using MacroMind Director, Mouse Practice is a nice example of multimedia presentation software from the time, and is remembered fondly by many folks that were "Mac kids" in the early '90s.This was recorded using HDMI on an Amiga 2000 with RGBtoHDMI, a classic "Hackintosh" running the A-Max emulator (1989) and Macintosh Plus ROMs. I used a RetroTink-2X Pro to record the [Amiga stereo] sound via the 'tink's HDMI output, simultaneously but a separate HDMI source from the RGBtoHDMI video. The Macintosh Plus is monophonic, so it's just one channel here.(typo in "credits" at end... I mistyped "A-Max" as "A-Maz"... where are my reading glasses? :) )Related:Mouse Practice (software; Macintosh Garden)macintoshgarden.org/apps/mouse-practiceApple Macintosh - Mouse Practice (color)youtube.com/watch?v=nV-d5F-AdX8"Adding HDMI to a stock Macintosh Classic" (Adrian's Digital Basement)youtube.com/watch?v=pvjsXbz1xlk
C64 Turtle Graphics: Rotational Symmetries from Repeating Decimals #shorts Dr. Daves Diversions 2022-02-07 | Fun with Turtle Graphics on the Commodore 64 c. 1984!This is a visualization is of the value 1/7 (one-seventh), a rational number with a repeating decimal that forms a nice rotationally symmetric figure when its base 10 digits are used to determine the fraction of 360 degrees rotated before drawing the next line segment.Here is what I wrote today using HESware's Turtle Graphics II (c) 1983. Because this language does not have arrays, I could not simply drop the digits of 1/7 (0.14285714285714...) into an array like they do using python in the Numberphile videos (linked below). Instead, I decided to calculate each digit on each loop iteration (DRAW). Note that C64's INT() function is actually floor() and that this language, like C64 BASIC, does not have a modulo operator, which is why the calculations are more verbose. This is in the 64's 320x200 mode ("HIRES"!). Currently the fraction (1/7) is hard-coded, as well as the length of the repeating run (7) and the number of iterations (100).1 HIRES2 SET HEADING TO 03 MOVE TO 80-1304 PEN DOWN5 CALCULATE X=06 LABEL DRAW7 FORWARD 508 CALCULATE Y=X-(INT(X/7)*7)9 CALCULATE A=INT((1/7)*(10^Y))10 CALCULATE D=36*(A-INT(A/10)*10)11 TEST IF (D=0)12 IF TRUE JUMP POSTROT13 ROTATE LEFT D14 LABEL POSTROT15 CALCULATE X=X+116 TEST IF (X=100)17 IF FALSE JUMP DRAW18 STOPRelated:"Plotting Pi and Searching for Mona Lisa - Numberphile"youtube.com/watch?v=tkC1HHuuk7cThe specific figure I plot is shown beginning at 7m20s:youtube.com/watch?v=tkC1HHuuk7c&t=7m20s"The Plotting of Beautiful Curves (Euler Spirals and Sierpiński Triangles) - Numberphile"youtube.com/watch?v=kMBj2fp52tA"The Turtles are Coming!" by David Malmberg, pp. 26-28, Commodore Power-Play, 1982, Issue 2, V1, N02, Fall (issuu.com)issuu.com/astarothduke/docs/commodore_power-play_1982_issue_02_v1_n02_fall"David Malmberg Interview" (brasslantern.org)http://brasslantern.org/community/interviews/malmberg-b.htmlq(D.M.: Sort of. I wrote and published a product for the Commodore-64 and VIC-20 titled "TurtleGraphics," which sold approximately 80,000 copies and was translated into French and Spanish. It was actually published by a company called HESware, which I helped found. Turtle Graphics was a LOGO-like language/product designed to teach programming skills to "kids from six to sixty.")"ANTIC Interview 285 - Jay Balakrishnan, HESWare" (audio)ataripodcast.libsyn.com/antic-interview-285-jay-balakrishnan-hesware
#shorts Vinegar for leaked battery? Yay or nay? Dr. Daves Diversions 2022-01-29 | Some folks advocate using vinegar as an additional solvent (alternating with isopropyl alcohol) when cleaning up electrolyte damage from a battery... here's why.Another experiment with #shorts... back to your regularly scheduled program. :)
#shorts Quick Tour of the Dave Cave Dr. Daves Diversions 2022-01-28 | Here's a quick diversion showing highlights of my retrocomputing and electronics bench where I work in the basement of my home.This "home office" has a Wright Line LINX modular office desk, homemade workbench, and an Easy Track closet organizer shelf and drawer system.This is also an experiment as a first video edited on my phone. :)
#DOScember CGA Easter Egg Hunt Dr. Daves Diversions 2021-12-28 | In this video we discuss the Color Graphics Adapter (CGA), introduced by IBM in 1981. We'll delve into the video memory segment (frame buffer) layout when in graphics mode(s) and convert from PNG to CGA frame buffer format. Let's see who can build on this information to find the hidden message, or "Easter egg", in this graphical image of the #DOScember logo: minidraw doscembr.pic (640x200 2-color CGA raw 16KB frame buffer binary) pastebin.com/nCWZmex9 (After uudecoding, copy this file to A:\SAVED.PIC for minidraw to LOAD it.)UPDATE 31-DEC-2021: The first person has contacted me and provided evidence that they found the Easter egg!00:00 intro00:14 introlude00:49 background03:28 the CGA card and the Motorola CRTC IC06:30 minidraw and the challenge of converting a PNG image for it and CGA frame buffer13:45 correction: I misspoke by calling it the "modulus" function; I meant "modulo". (Modulus is the divisor in the modulo operation.)14:52 debugging based on visual "glitch effects", 1st try19:26 debugging based on visual "glitch effects", 2nd try23:46 [un]wrapping things upThe script we share in this video is here: PNGtoCGA640x200 pastebin.com/Hu9nVECuMiniDraw (assembler DOS application):minidraw.asm revision 1.10 (white on black for better CGA/TGA compatibility)pastebin.com/t4Cpzswnminidraw manual (retyped from 1988 original)pastebin.com/PN53qtg5The Easter egg was hidden in 2020, in part 2 of this project: #DOScember x86 asm & Amiga Bridgeboard youtube.com/playlist?list=PL2O6RH1Isy65p-cPxMx9HGlq9O_j9iVdxRelated:CGA Graphics - Not as bad as you thought! (8-bit Guy)youtube.com/watch?v=niKblgZupOcColor Graphics Adapter (wikipedia)en.wikipedia.org/wiki/Color_Graphics_AdapterColour Graphics Adapter: Notes (John Elliott's homepage)seasip.info/VintagePC/cga.htmlPC System Programming for developers (See Chapter 10: "Accessing and Programming the Video Cards")by Tischer, Michael, 1953-Publication date 1990archive.org/details/PC_System_ProgrammingChapter 10: "Accessing and Programming the Video Cards" (a better scan of this chapter from the book above)http://www.minuszerodegrees.net/misc/PC%20System%20Programming%20-%20Chap%2010.pdfMotorola 6845en.wikipedia.org/wiki/Motorola_6845IBM's CGA Hardware Explained (Nerdly Pleasures)http://nerdlypleasures.blogspot.com/2016/05/ibms-cga-hardware-explained.htmlIBM PC Color Composite Graphics (Nerdly Pleasures)http://nerdlypleasures.blogspot.com/2013/11/ibm-pc-color-composite-graphics.htmlThe original #DOScember logo was created by DaveJustDave.youtube.com/user/MrDavejustdaveGlitch Effect: Delving Into The Digital Image Distortionblog.123rf.com/image-glitch-effect
AmigaBASIC Lissajous figure #shorts Dr. Daves Diversions 2021-12-06 | Nerding around making Lissajous figures in XY mode on the oscilloscope with my Amiga''s stereo channels and AmigaBASIC from 1986!
Operation Boat Lift Lift: using snatch blocks to pull a boat lift ashore Dr. Daves Diversions 2021-10-04 | In this video, we'll use snatch blocks, along with a tree and a Subaru Crosstrek, to move a 600-pound (270 kg) boat lift from the lake to the shore. Specifically, we'll build and use the Luff tackle, having a 3X mechanical advantage.00:00 intro00:15 introlude00:56 the equipment and plan02:35 phase 0: putting wheels on the lift04:19 phase 1: moving the lift to shore (no mechanical advantage)08:00 phase 2: rearranging to the Luff tackle (3x mechanical advantage)10:30 [un]wrapping things upRelated:Rove to (dis)advantage [Luff tackle] (Wikipedia)en.wikipedia.org/wiki/Block_and_tackle#Rove_to_(dis)advantageWhy Snatch Blocks are AWESOME (Smarter Every Day)youtube.com/watch?v=M2w3NZzPwOMAxle Hitch Tow Rope - Useful Knot for Dragging Heavy Objects - or Emergency Towing (Johnny Debt)youtube.com/watch?v=uGChmSC5oL0
My favorite things at VCF Midwest! Dr. Daves Diversions 2021-09-18 | In this video I share my favorite things seen at Vintage Computer Festival Midwest (VCF Midwest 16, Sep 2021) with accompanying photos and backstory.Filmed at the Vintage Computer Festival Midwest: VCF Midwest 16, September 11, 2021http://vcfmw.org00:00 intro00:13 an introlude02:22 Commodore PET02:55 another PET03:27 modern C64 game author03:53 Forgotten Machines04:15 How the 8-Bit Demoscene Works (David Murray)05:13 TRS-80 Model III06:02 DEC VT 42007:22 Vintage Computer YouTubers Discussion Panel (8-Bit Guy, LGR, and Ken from Computer Clan)08:01 DEC VT10008:50 Amiga 2000, Commodore 128D, Commodore SX-64, MSD floppy drive09:18 MITS Altair 8800 replica11:14 TRS-80 Model 4P11:38 Ultimate Networking with GEOS (Cenbe)13:05 Atari XE System13:57 A-Max cartridge (Mac emulator for Amiga)14:50 TeleVideo Rises Again: Recreating a lost machine (Pat Finnegan)15:56 Acorn A300018:03 heading home, a last acquisition :)Related:VCFMW 16 (2021) YouTube Playlist:youtube.com/playlist?list=PLE-Iywr9LQERvrBi8w95umcf1y1RE7qCe"The One Where We Discuss the Amazing Time We Had at Vintage Computer Festival Midwest!" (Ron's Computer Videos)youtube.com/watch?v=1ie6b_1IjHc"Altair 8800 Replica" (element14 presents)youtube.com/watch?v=zqRILp6srBk"ALTAIR 8800 EMULATOR KIT"adwaterandstir.com/product/altair-8800-emulator-kit"PDP 11/23 running UNIX version 6 at VCF Midwest!"youtube.com/watch?v=_Zyng5Ob-e8cc65 library for accessing the DOS and network functions of the Ultimate II+ cartridge and Ultimate 64 motherboardgithub.com/xlar54/ultimateii-dos-libAcorn Archimedes / A3000en.wikipedia.org/wiki/Acorn_Archimedes#A3000The First ARM Processor Computer - Acorn Archimedes A3000 (EEVblog)youtube.com/watch?v=tPq7OF3fkcE(Dave says the A3000 uses the ARM2 processor..... now I see Wikipedia says the same. :) )Acorn Archimedes A3010: Was It Better Than The Amiga? (Dan Wood)youtube.com/watch?v=Z1osEX6eYHE"My First Vintage Computer Festival Midwest - What did I find? (VCF Midwest 2021 - Part 1)"youtube.com/watch?v=1PYrUAD64-s"PDP 11/23 running UNIX version 6 at VCF Midwest!"youtube.com/watch?v=_Zyng5Ob-e8
PDP 11/23 running UNIX version 6 at VCF Midwest! Dr. Daves Diversions 2021-09-13 | In this video I share my personal pick for "best" demo at VCF Midwest: Gavin's PDP 11/23 running UNIX Version 6! We write and run a simple BASIC program in Ken Thompson's bas(1), finding some quirks with this (currently) entirely floppy-based system, possible having to do with a glitch in disk I/O. (We discovered bas(1) uses a temporary file as backing store.)Filmed at the Vintage Computer Festival Midwest: VCF Midwest 16, September 11, 2021http://vcfmw.orgHere's the source code to the simple program we wrote; you can also run it on modern machines if you install a Research UNIX version using SimH (pdp-11 simulator).5 goto 3010 for col = 1 arg(1)12 prompt " "14 next20 print "Welcome to VCF Midwest!"25 return30 for x = 0 5540 10(x)50 next60 for x = _56 _170 10(_x)80 nextRelated:bas man page (v7 UNIX)unix.com/man-page/v7/1/bas"No BS: the First UNIX BASIC!"youtube.com/watch?v=LZUMNZTUJos
VCF Midwest almost here; Kenmore Washing Machine Fix! Dr. Daves Diversions 2021-09-06 | In this video, we have a short channel update and repair a Sears Kenmore washing machine c. 2002 by replacing its drain pump - just in time for the Vintage Computer Federation Midwest Festival, (VCF Midwest) September 11-12, 2021!00:00 intro00:31 an introlude00:55 channel update03:11 washing machine problem04:40 starting the drain pump repair12:38 testing the repair14:20 original pump tear-down17:50 sign-offDetails:The original pump was an Askoll brand pump (made in Italy), labeled "Mod. M 65", and bore the number 134051100. It had a manufacture date of June 25, 2002.The replacement pump is similar but also somewhat different: it has the outlet on the opposite side so was not a direct replacement for the original. Instead, it is a direct replacement for the following pumps: AP5684706, 131724000, 134051200, 134740500, 137108100, 137151800, 137151800KITK, 2754548, ER137108100, PS7783938, TJ137108100Related:Vintage Computer Federation Midwest: http://vcfmw.org(Yup, that's really it! Click on the (flaming) "Announcements" button and the ones at the bottom of the page: demos, live performances, etc.)FranLab t-shirt: bonfire.com/franlab-vintage-logo-shirtf*** traceroute t-shirt: thousandeyes.com/tshirt
Apple ][ PETSCII Robots Attack on Amiga! Dr. Daves Diversions 2021-05-19 | In this video we celebrate the Amiga by running Attack of the PETSCII Robots on the Amiga! The twist is that we'll run the Apple ][ version of the game using the Apple 2000 Apple ][+ emulator for the accelerated Amiga.Update 15 Nov 2021: Note that an Amiga version of the game is now in the works. This is not it! :)See details here:"Petscii Robots invade the C128, Amiga, NES and more!" (8-bit guy)youtube.com/watch?v=aXWqZtBwdjA00:00 intro00:18 an introlude00:41 channel update03:08 Attack of the PETSCII Robots - Apple ][ edition04:00 the Apple 2000 Apple ][+ Emulator07:30 running ApImU on the Amiga13:05 running a2robots under Apple 200014:15 game play on RGB and composite video17:52 conclusion and "What's next?"Related:4 Geeks in a Podcast - Reverse Engineering (Joe's Computer Museum)youtube.com/watch?v=t93Rvm_IdFMretrobits (Matt): youtube.com/c/retrobitstvTemporarily Offline (Steve): youtube.com/c/temporarilyofflineJoe's Computer Museum: youtube.com/c/JoesComputerMuseumFrank's 3D Shop: youtube.com/c/Franks3DshopFrank's Playground: youtube.com/channel/UCGWc3-CisXiKtmjRUpL1fVQPETSCII Robots for Apple ][http://www.the8bitguy.com/26654/petscii-robots-for-apple-ii-now-availableCredits: David Murray (concept, code), Ian Brumby (code), Stefan Wessels (sound / music code), Noelle Aman (music), Anders Enger Jensen (Box and manual design), Bill Giggie (art), Piotr Radecki (IIgs art), Brendan Carrmody (box art).Attack of the Petscii Robots (Facebook Group)facebook.com/groups/975620876261750Apple 2000 v1.7 Apple ][+ Emulator: http://aminet.net/package/misc/emu/Apple2000Apple 2000-based Apple //e Emulator: http://aminet.net/package/misc/emu/Apple2000eApple ][ disk image file utility: http://aminet.net/package/misc/emu/App8ImUAttack of the PETSCII Robots... on the Apple IIe Card for Macintosh? (Ron's Computer Videos)youtube.com/watch?v=F_Fyoqu8IQAGetting Total Replay working on the Apple IIe Card for Macintosh (Ron's Computer Videos)youtube.com/watch?v=LJIKQLy6zH08-Bit Retro Journal: youtube.com/c/8BitRetroJournalThe #AMayGA playlist: youtube.com/hashtag/amayga
Fixing Commodore 64 problems I didnt know I had Dr. Daves Diversions 2021-04-13 | In this video I tell you about three problems that I solved with the help of the YouTube community. They were all problems that my Commodore 64 has had since 1983! I just didn't know it until I learned more from the retrocomputing community.Specifically, I fix a "wavy" character problem, where a horizontal line moves up and down through some C64 characters in some screen positions and refer you to earlier videos about two other problems (missing heat sinks on early C64s and a non-working RESTORE key.)00:00 Intro02:35 demonstrating the "wavy" character problem03:05 the new character ROM (DIP) from eBay03:40 C64 breadbin disassembly06:10 installing the replacement ROM06:40 C64 reassembly and Pennsylvania-manufactured serial number on case07:38 testing the replacement ROM07:55 comments about (a) voltage regulator heat problems and (b) problems with the RESTORE key10:35 What's next?Related:2021 C64 Repair-a-thon #2: "Hmm, the mystery deepens!"youtube.com/watch?v=qd9cvRls4to&t=46s (46s)The Silicon Underground:How to open and reassemble a Commodore 64 or VIC-20 without breaking tabsdfarq.homeip.net/how-to-open-a-commodore-64-or-vic-20TheRetroChannel: Commodore 64 troubleshooting part 1 - the basicsyoutube.com/watch?v=sUyRKXOl-PIFrom the first BASIC to Casio fx-4000P calculator!youtube.com/watch?v=jsg6Xgev7CUElectroware C64 PSU heavy-duty mod (30W DC power)youtube.com/watch?v=daE0QzkroB8Be cool, Honey Bunny: Customized C64 Heatsinksyoutube.com/watch?v=F5tjHWYBYx8&t=4m21s (4m21s)Hearsay 1000 voice synthesis and recognition for the C64youtube.com/watch?v=CiSUfmSEXAA&t=8m40s (8m40s)Restoring the Commodore 64 Restore key - a quick and easy mod(Mark from youtube.com/c/TheRetroChannel)youtube.com/watch?v=GHhhidIybzURestoring a C64 PCB 326295 Rev A. The first C64 PCB revision.(iz8dwf - Frank)youtube.com/watch?v=IVvI998PWGE&t=3m45s (3m45s and 11m15s)Channels:Adrian's Digital Basement youtube.com/c/adriansdigitalbasementTheRetroChannel (Mark) youtube.com/c/TheRetroChanneliz8wdf (Frank) youtube.com/c/iz8dwf
#MARCHintosh Classic Mac Infocom Games: 80s and today Dr. Daves Diversions 2021-03-29 | In this #MARCHintosh video, we revisit three mid-'80s Infocom text adventure games in their original package, then show how to run them on modern machines today using a VM and the original bytecode! We also (preemptively?) claim this A-Max/Amiga/Fusion Forty - now with a real Apple 800k floppy disk drive - is the fastest Mac Plus of #MARCHintosh; feel free to prove me wrong!00:00 intro00:32 a #MARCHintosh montage (introlude)00:58 intro continued04:00 Hitchhiker's Guide to the Galaxy (1984)09:18 Starcross (1984)13:13 Stationfall (1987)18:46 Running Infocom text adventures using modern systems (Hitchhiker's Guide using frotz)23:02 wrap-up: #MARCHintosh and beyondRelated:Mac Startup Chimes Ambient (music by chuppified, used by permission)youtube.com/watch?v=TqEcEAipwpwTutorial: Cleaning, lubricating and fixing an Apple 800k 3.5" floppy drive (Adrian's Digital Basement)youtube.com/watch?v=0pGhwtyFG2IJeremy's Retro Bar (#MARCHintosh video featuring Floppy Emu)youtube.com/watch?v=d65ze2nuKp8Floppy Emubigmessowires.com/floppy-emuRon's Computer Videosyoutube.com/c/RonsComputerVideosReTroLab (Guillaume's channel)youtube.com/channel/UCi4UXu2kIcYnOlCyGl_MpIwretrobits (Matt's channel)youtube.com/c/retrobitstvAVE - Amateur Vintage Electronics (Michael's channel)youtube.com/channel/UCwJgaQ2Os28__i8NcO5CVVQ#MARCHintosh Event Logo concept and design by Javier RiveraYouTube: youtube.com/channel/UC550QsLjbk-zxUv4u717EJQTwitter: @javieriveraA #MARCHintosh playlistyoutube.com/hashtag/marchintosh
#MARCHintosh Mac Plus: Sneakernet to Ethernet? Dr. Daves Diversions 2021-03-17 | In this #MARCHintosh video, we see if we can upgrade my A-Max/Amiga-based Mac Plus from Sneakernet to Ethernet using the Asante EN/SC Ethernet over SCSI NIC (1993)!Will the luck 'o the Irish be with me? Let's see!00:00 intro00:28 a #MARCHintosh montage (introlude)00:53 intro to the Asante EN/SC Ethernet NIC and this project06:06 the Asante EN/SC on the Amiga14:42 diagnostic attempt under A-Max using System 6.0.815:52 Asante EN/SC teardown24:07 wrap-up and upcoming #MARCHintosh topicsCome join us for the month-long retro Macintosh celebration!marchintosh.comXerox Alto (wikipedia.org)en.wikipedia.org/wiki/Xerox_AltoEthernet (wikipedia.org)en.wikipedia.org/wiki/EthernetRobert Metcalfe (wikipedia.org)en.wikipedia.org/wiki/Robert_MetcalfeMark's TheRetroChannelyoutube.com/c/TheRetroChannelJoe's Computer Museumyoutube.com/c/JoesComputerMuseum#MARCHintosh Event Logo concept and design by Javier RiveraYouTube: youtube.com/channel/UC550QsLjbk-zxUv4u717EJQTwitter: @javieriveraA #MARCHintosh playlistyoutube.com/hashtag/marchintosh
#MARCHintosh: The original Mac mouse goes MIgA! Dr. Daves Diversions 2021-03-07 | In this #MARCHintosh video, we take a look at the original Apple Macintosh mouse and adapt this iconic device to work with a Commodore Amiga for perfect for a vintage experience using a Mac Plus-based A-Max II emulator!00:00 intro00:43 a #MARCHintosh montage (introlude)01:08 this project and my intro to the Mac mouse04:40 building the Mac M0100 mouse to Amiga converter/connector08:37 the mouse in A-Max action10:45 wrap-up, Mac Plus performance challenge, and upcoming #MARCHintosh topicsCome join us for the month-long retro Macintosh celebration!marchintosh.comyoutube.com/hashtag/marchintosh (a YouTube auto-generated playlist)Related:Macintosh Mouse (M0100)en.wikipedia.org/wiki/Apple_Mouse#Macintosh_Mouse_(M0100)Apple’s Mouse: A History512pixels.net/2012/11/mouseMac Plus Mouse Alternatives - HAS THE "Amiga mouse adapter" TABLE I USED!web.archive.org/web/20130210064705/http://blog.syrinxsystems.co.uk/mac-plus-mouse-alternativesResurrecting my Macintosh Plus : Mousehttps://blog.rekawek.eu/2016/12/08/mac-plus/Bus Mouse (Apple)deskthority.net/wiki/Bus_mouse#AppleReTroLab (Guillaume's channel)youtube.com/channel/UCi4UXu2kIcYnOlCyGl_MpIwThe fastest Mac Plus ever?youtube.com/watch?v=JAk8n5CWMAI#MARCHintosh Event Logo concept and design by Javier RiveraYouTube: youtube.com/channel/UC550QsLjbk-zxUv4u717EJQTwitter: @javierivera
#MARCHintosh: The fastest Mac Plus ever? Dr. Daves Diversions 2021-03-01 | In this #MARCHintosh video, we revive my unusual Mac Plus from 1991 running the A-Max emulator on an Amiga 2000 with a Fusion Forty 68040-based accelerator. We take a look at its hardware, its System 6.0.5 software, and its benchmark results using Speedometer 3.06. Next we look at some files and applications, on its old hard drive, that I've not used in decades, sharing how I used the Mac back then and why I first fell in love with it... well, sort of. ;)00:00 intro00:28 a #MARCHintosh montage00:54 catching-up with my channel04:20 the A-Max cartridge and Mac ROMs08:03 booting the system11:07 booting System 6.0.5 and a look around13:41 benchmarking the system14:54 The tests are done!17:25 running apps like it's 199124:25 Mac Plus Speedometer challenge24:50 my upcoming #MARCHintosh topicsSome stats to beat, as measured by Speedometer 3.06:Speedometer's combined Performance Rating: 12.117CPU, times faster than Mac Classic: 16.373BenchMark Mix: ave. times faster than Classic: 19.119Come join us for the month-long retro Macintosh celebration!marchintosh.comRelated:10 Minute Amiga Retro Cast EP 38: SCSI2SD for your Amigayoutube.com/watch?v=R4w5EZJkNC0Commodore Doctor - Let's give these units a checkup and diagnosis LIVEyoutube.com/watch?v=7Q9PTgz384c&list=PL2O6RH1Isy65x7DsdNEHab7pm1bAwiGREFusion Forty Amiga in 2020!youtube.com/watch?v=7xhsxuF_ML8&list=PL2O6RH1Isy66J0UDsqUbcBHhbEuSWQg5_Ron's Computer Videosyoutube.com/c/RonsComputerVideosJoe's Computer Museumyoutube.com/c/JoesComputerMuseumThe Fastest Apple Mac is an Amiga - Fact or Fiction? (RMC)(Mac LC III; 68030 @ 12MHz vs. Amiga 1200; 68EC020 @ 14MHz)youtube.com/watch?v=Jph0gxzL3UIApple Macintosh Plus (ED) Specseverymac.com/systems/apple/mac_classic/specs/mac_plus.htmlThe "Official" A-Max Home Pagecrossconnect.tripod.com/AMAXHOME.HTML#MARCHintosh Event Logo concept and design by Javier RiveraYouTube: youtube.com/channel/UC550QsLjbk-zxUv4u717EJQTwitter: @javieriveraA #MARCHintosh playlistyoutube.com/hashtag/marchintosh
Outtake: 99 bottles of Casio! Dr. Daves Diversions 2021-02-02 | In this "no frills" video, we port three BASIC programs to the Casio fx-4000P calculator, demonstrating its programming language and culminating in the classic "99 Bottles of Beer" program that we wrote in Ken Thompson's "bas" (youtube.com/watch?v=LZUMNZTUJos) and then in Dick Haight's "bs" (youtube.com/watch?v=ELICIa3L22o) Unix programming languages (in those recent videos).This is an outtake originally intended (but too long) for my previous video where we ported a more interesting BASIC program, to solve a quintic equation, instead:youtube.com/watch?v=jsg6Xgev7CU00:00 inPerNS (distance in inches that light travels in one nanosecond)02:06 6pct5yr1000usd (compound interest on a loan of 1000 dollars for 5 years at 6% interest)07:05 99bottles (words to the song "99 bottles of beer")Please see the description in that video for many more links about the Casio fx-4000P.
From the first BASIC to Casio fx-4000P calculator! Dr. Daves Diversions 2021-02-01 | In this video, we go back to BASICs. First, we go back to the birth of BASIC - the 1960s - and see how Dartmouth College students programmed in BASIC on the Dartmouth Time Sharing System (DTSS). Next, we'll discover a bug in one of those students' programs, then fix and test it using the Commodore 64. Ultimately, we'll jump to the mid-1980s - when I started college - and pit C64 BASIC against the Casio fx-4000P programmable scientific calculator's BASIC-like dialect by solving the same quintic equation that challenged those mathematics students at Dartmouth in the 1960s.00:00 intro02:00 the birth of BASIC and the DTSS04:41 running and fixing a 1960s-era BASIC program on the C6407:29 using Wolfram|Alpha to find the verify the solution (look here if the math involved is unfamiliar to you)08:49 porting the program to the Casio fx-4000P18:23 running the program head to head - C64 vs. fx-4000P19:42 parting thoughtsPocket Computers from the 1980s (The 8-Bit Guy)youtube.com/watch?v=d3NIe1jTZMcBirth of BASIC (~40 mins, Dartmouth)youtube.com/watch?v=WYPNjSoDrqwBASIC at 50 (4 mins, Dartmouth)youtube.com/watch?v=gxo9LVIgOiICasio fx-4000p (rskey.org)http://rskey.org/fx4000phttp://rskey.org/ec4020 (Radio Shack-branded version)Casio fx-5200p (rskey.org)http://www.rskey.org/fx5200p (a similar vintage Casio calculator with BASIC, instead)Casio fx-790p (rskey.org)http://www.rskey.org/fx790p (a similar vintage Casio pocket computer with BASIC)CASIO fx-4000P scientific calculator from 1986 (teardown, HPmuseum.org)hpmuseum.org/forum/thread-5278.htmlfx-4000p Owner's Manualcasio.ledudu.com/images/pockets/casio/manuels/fx4000p.pdffx-7000g Owner's Manual, Chapter 4: Program Computationsweb.archive.org/web/20031216054750/http://www.silrun.de/casio/fx7000/manual/Chapter4.pdfCasio fx-7000G - The World's First Graphing Calculator (Calculator Culture)youtube.com/watch?v=NQsP0r4X60EThe Dartmouth Time-sharing Computing System Final Report April 1967 (ed.gov)YOUN CAN FIND THE "QUINT" MATH PROBLEM ON PAGE 62 OF THIS PDF.files.eric.ed.gov/fulltext/ED024602.pdfQuintic Equationmathworld.wolfram.com/QuinticEquation.html
Serious smoker mods for old gas grills Dr. Daves Diversions 2021-01-26 | In this video I share three ways to seriously modify an old gas grill for smoking meats. Specifically, we'll (a) drill new valve orifices to dial-in our low cooking temperatures, on a grill with (b) a modified burner and (c) a cold smoke generator. Then we'll test the setup by smoking the perfect chuck roast (ahem).00:00 intro01:42 warning notice02:00 the problem and modifications04:51 removing the valve orifices05:32 orifice sizes and BTUs06:45 drilling new valve orifices10:07 testing the grill with modified orifice11:08 choppin' wood chunks12:08 putting the meat on (starting the 6.5 hour cook)14:15 wrapping the meat15:35 slicing16:50 retrogrilling wrap-upRelated:Add a blowtorch to your gas grill! (also shows lighting cold smoke generator)youtube.com/watch?v=HBn6Tfl0EUgPropane/Natural Gas Conversion (GrillParts.com)"Click Here to See Our BTU and Orifice Size Guide"grillparts.com/howto/conversion.htmOrifice Drill Size Chart (KeyGas.com)keygas.com/wp-content/uploads/2016/12/Drill_Chart-1.pdfConversion Chart (Drill Size to LP gas BTUs, AndersonForrester.com)andersonforrester.com/conversion-chartCLAGrills.com (where I bought my new valve orifices)clagrills.comThe "FixIt" Manual: Gas Grill Repair & Maintenance by Romero Carl Hunter (CarlsGrillTalk.com)http://carlsgrilltalk.com/portal/images/stories/fitItChapPDFs/11.07.11%20for%20publication%20to%20website2.pdfPropane and Gas Conversion Basics (How to)youtube.com/watch?v=Et4rBQovAHYDrilling a gas orifice (2 min)youtube.com/watch?v=-OZ2CUi-QvkBig Kahuna Cold Smoke Generator (SmokeDaddyInc.com)smokedaddyinc.com/product/big-kahuna-cold-smoke-generator
BS: a mysterious Unix programming language! Dr. Daves Diversions 2021-01-20 | In this video we go back to 1980 to explore Dick Haight's programming language having some characteristics of BASIC, SNOBOL4, and C: the bs command that appeared in the first commercial UNIX and still survives in many Unices today. We show how to run UNIX System III (c. 1980) using SimH (pdp-11 simulator) on macOS and then have a try at programming with bs!I certainly don't cover everything: bs also has hashes (that it calls tables); bs allows you to call undefined functions (and it will prompt you for a return value); and bs has an include directive, although it didn't work for me under System III.00:00 intro01:20 rediscovering its origin03:30 comments and stories from Dick Haight05:50 getting UNIX System III up and running07:53 running bs interactively09:58 programming in bs16:39 implementing sprintf in bs21:50 Fibonacci sequence (recursion)22:04 parting bs thoughtsUNIX System III on PDP-11 (the instructions and tape image used in the video)http://a.papnet.eu/UNIX/sysIII_pdp11/Installation99 bottles of bs (builtins method, 1996 version)pastebin.com/HPVCjynX99 bottles of bs (sprintf method)pastebin.com/fxDgwBDdbs implementation of sprintf (local variables method; broken?)pastebin.com/NHk9Pf7q99 Bottles of Beer(99 Bottles of Beer site seems to be down, so this is an archived version:)web.archive.org/web/20200303035649/http://www.99-bottles-of-beer.net(Earlier, e.g., 1999, these programs were at the follow, but that seems poorly archived: http://www.ionet.net/~timtroyr/funhouse/beer.html )The bs wikipedia entry:en.wikipedia.org/wiki/Bs_%28programming_language%29bs(1) man page in UNIX User Manual Release 3 Jun 1980http://bitsavers.informatik.uni-stuttgart.de/pdf/att/unix/System_III/UNIX_Users_Manual_Release_3_Jun80.pdfbs(1) man page in AIX 7.2ibm.com/support/knowledgecenter/ssw_aix_72/b_commands/bs.htmlbs(1) man page in HP-UX Release 11i (December 2000)http://h10032.www1.hp.com/ctg/Manual/c00386893.pdfDick Haight's bloghttp://dicks-raspberry-pi.blogspot.comDick Haight on The Unix Heritage Society (TUHS) Wiki:wiki.tuhs.org/doku.php?id=people:dick_haightThese images used by permission of Faces of Open Source / Peter Adams ( peteradamsphoto.com ):facesofopensource.com/doug-mcilroyfacesofopensource.com/ted-dolottafacesofopensource.com/brian-kernighanfacesofopensource.com/john-masheyfacesofopensource.com/steve-johnsonfacesofopensource.com/rudd-canadayUnix Playing Cardsblog.dshr.org/p/unix-p.htmlSystem III source code, including bs:http://a.papnet.eu/UNIX/sysIII_pdp11/files/original_tuhs/sys3.tar.gz(linked from: http://a.papnet.eu/UNIX/sysIII_pdp11/files/original_tuhs/)
No BS: the First UNIX BASIC! Dr. Daves Diversions 2021-01-13 | In this video we go back to the 1970s exploring Ken Thompson's BASIC dialect: the bas command in "ancient" Research UNIX. We show how to run the 7th Edition of UNIX on SimH (pdp-11 simulator) on Sanos on qemu on macOS and then have a try at programming with bas!00:00 intro03:35 getting 7th Edition of UNIX up and running under a pdp-11 simulator06:40 running bas interactively07:52 programs in bas08:12 99 bottles: goto method10:36 99 bottles: for loop method12:30 99 bottles: function method15:33 summary and what's nextbas man page (v7 UNIX)unix.com/man-page/v7/1/bas99 bottles of bas (goto method)pastebin.com/YKwmLmZi 99 bottles of bas (for loop method)pastebin.com/6DWTugrQ99 bottles of bas (functions method)pastebin.com/SrwdPvp599 Bottles of Beer(99 Bottles of Beer site seems to be down, so this is an archived version:)web.archive.org/web/20200303035649/http://www.99-bottles-of-beer.netVCF East 2019 -- Brian Kernighan interviews Ken Thompsonyoutube.com/watch?v=EY6q5dv_B-oSanos PDP-11 Simulator with UNIX V7http://www.jbox.dk/sanos/pdp11.htmMichael Ringgaard's web site:http://www.jbox.dk/"A Research UNIX Reader: Annotated Excerpts from the Programmer’s Manual, 1971-1986" by M. Douglas McIlroyhttps://www.cs.dartmouth.edu/~doug/reader.pdfThese images used by permission of Faces of Open Source / Peter Adams ( peteradamsphoto.com ):facesofopensource.com/ken-thompson-3facesofopensource.com/doug-mcilroybas source code from v7 (Thanks to Clem Cole):minnie.tuhs.org/cgi-bin/utree.pl?file=V7/usr/src/cmd/bas bas source code (PDP-11 assembler, files: bas0.s, bas1.s):code.google.com/archive/p/unix-jun72/downloads (svntree)Here's the source distribution of an *unrelated* BASIC called "Bas":http://www.moria.de/~michael/bas/
Hearsay 1000 voice synthesis and recognition for the C64 Dr. Daves Diversions 2021-01-03 | In this video we give a thorough look at the Hearsay 1000, a speech system for the Commodore 64 (1986) based on the General Instrument SP1000 integrated circuit (1982). We research its origins, run an insufferable demo, and then write a simple BASIC program to test it as a "relay" to the Google Home, assessing its voice recognition and speech quality.00:00 intro04:00 General Instrument SP100004:45 Lis'ner 1000 (ancestor of the Hearsay 1000?)06:00 Hearsay history08:40 fixing the RESTORE key (necessary for Hearsay 1000)09:55 running a Hearsay 1000 demo12:38 Hearsay 1000 training and testing with Google Home16:38 YAY! The 64 relays my spoken command to the Google Home!17:25 concluding thoughtsRelated:Adrian's Digital Basement - Mail Call #2 (Jan 2020)youtube.com/watch?v=shfzfdaZGYM#t=1mMikes Retro Tech: C64 Magic Voice Cartridgeyoutube.com/watch?v=uvNLnGdJcRYInside a 1st gen "Pong" TV video game experience (based on another General Instrument IC)youtube.com/watch?v=HCZiJYoOOWEGeneral Instrument ads for the SP1000, etc.:http://www.ferretronix.com/tech/chipsSpeech Synthesizers For the Commodore Computers Part II by Morton Kevelson (Ahoy! Magazine 1986, page 32)commodore.ca/gallery/magazines/ahoy/Ahoy-issue-25-01.pdfSpeech Synthesizers for the Commodore Computers by Morton Kevelson (Ahoy! Magazine 1986, page 33)commodore.ca/gallery/magazines/ahoy/Ahoy-issue-24-01.pdfCiarcia's Circuit Cellar: The Lis'ner 1000 (Byte Magazine, Nov. 1984):web.archive.org/web/20190421033230/http://www.appleii-box.de/APPLE2/H221TheListner1000/TheListner1000.pdfworldradiohistory.com/hd2/IDX-Consumer/Archive-Byte-IDX/IDX/80s/84-85/Byte-1984-11-OCR-Page-0119.pdfRestoring the Commodore 64 Restore key - a quick and easy mod(Mark from youtube.com/c/TheRetroChannel)youtube.com/watch?v=GHhhidIybzU Talk is Cheaper by Mickey McLean (COMPUTE!'s Gazette, Aug. 1988, page 21)annarchive.com/files/Compute_Gazette_Issue_62_1988_Aug.pdfAny mistaken conclusions about the the history are my own, but are based on my readings of others. Please post corrections as comments.
Inside a 1st gen Pong TV video game experience Dr. Daves Diversions 2020-12-29 | In this video we will look inside a first generation video game console - the Radio Shack Electronic TV Scoreboard based on the General Instrument AY-3-8500 "Pong on a Chip" IC - and assemble an authentic experience using it with a B&W TV.00:00 intro00:44 the Radio Shack Electronic TV Scoreboard05:22 a "new" Bentley 4.5" B&W TV07:20 outside the TV Scoreboard09:16 inside the TV Scoreboard11:54 the GI AY-3-8500-based game console in action13:05 the hidden handicap variation of the hockey/foosball/soccer game13:26 the weird CRT spot bug/issue with the Bentley TV14:05 significance of these devices and conclusion15:04 just a glimpse of spelunking in my basement crawlspaceRelated:Atari’s Home Consoles Before the 2600 (Operation 8-Bit)youtube.com/watch?v=S3QuZrNmOKEVideo Game History (Smithsonian Institution)https://americanhistory.si.edu/collections/object-groups/the-father-of-the-video-game-the-ralph-baer-prototypes-and-electronic-games/video-game-historyThe Father of the Video Game: The Ralph Baer Prototypes and Electronic Games (Smithsonian Institution)https://americanhistory.si.edu/collections/object-groups/the-father-of-the-video-game-the-ralph-baer-prototypes-and-electronic-gamesPONG in a Chip (Pong-Story.com)http://www.pong-story.com/gi.htmThe Pong Museumhttp://PongMuseum.com/First generation of video game consoles (Wikipedia)en.wikipedia.org/wiki/First_generation_of_video_game_consoles#Coleco_Telstar_seriesAY-3-8500 (Wikipedia)en.wikipedia.org/wiki/AY-3-8500APF TV Fun and Radio Shack TV Scoreboard (AtariAge, 2017)https://AtariAge.com/forums/topic/268207-apf-tv-fun-and-radio-shack-tv-scoreboard/Unboxing and look at a 1986 Bentley model 4500 4.5" B&W televisionyoutube.com/watch?v=vPohP0y9aB8Fixing the 9" PET's monitors turn-off spot (With Adrian Digital Basement)youtube.com/watch?v=WULJxrQkQegReally fixing the CRT spot on the Commodore PET 2001youtube.com/watch?v=tBs8TisaDE4First Look: PONG Clone - AY-3-8500 Decap and AI Mapping by Cole Johnsonyoutube.com/watch?v=aWVxMIlokdsPong On A Chip Teardown - The Electronics Insideyoutube.com/watch?v=waZW6umb_9IA (slightly late) Christmas present (blogspot.com)nerdstuffbycole.blogspot.com/2020/01/end-of-year-update.htmlMiSTer FPGA Hardware (RetroRGB.com)retrorgb.com/mister.html
#DOScember x86 asm & Amiga Bridgeboard - part 2 (my intro to DOS) Dr. Daves Diversions 2020-12-22 | In this video I share the second (final) part of my #DOScember 2020 project: reviving my Commodore A2088 XT Bridgeboard that I bought in 1990, running DOS 3.3, and testing it by running the first DOS application I wrote in 1988 using x86 assembler, called MiniDraw. The video also includes an introduction to x86 assembler for MS-DOS, based on MiniDraw, which I revise to fix minor bugs and release to the public domain.00:00 intro02:03 fixing the invisible mouse pointer03:36 ... a minidraw CGA 640x200 2-color mode issue06:45 ... a minidraw FREEdrawing issue with the mouse08:14 a MS-DOS 720k floppy sneakernet solution: Linux to Amiga to MS-DOS09:57 framing the DOS programming environment11:17 running the assembler (UASM) and building minidraw14:04 assembler source code overview using minidraw.asm17:53 ... a sample BIOS function invocation19:14 ... finding which BIOS and DOS functions an assembler program uses20:27 a sample code revision: fixing the CGA 2-color mode issue24:00 testing the revised minidraw application, first on Bridgeboard @ 4.77 MHz25:46 ... on Tandy 1000 HX @ 7.16MHz with RetroTech Chris26:16 conclusions, misses & hits29:30 ... a special #DOScember gift for youMiniDraw (assembler DOS application):minidraw.asm revision 1.10 (white on black for better CGA/TGA compatibility)pastebin.com/t4Cpzswnminidraw manual (retyped from 1988 original)pastebin.com/PN53qtg5minidraw doscembr.pic (640x200 2-color CGA raw 16KB frame buffer binary)pastebin.com/nCWZmex9(After uudecoding, copy this file to A:\SAVED.PIC for minidraw to LOAD it.)Related:My #DOScember project playlist:youtube.com/playlist?list=PL2O6RH1Isy65p-cPxMx9HGlq9O_j9iVdxDaveJustDave: youtube.com/user/MrDavejustdaveRetroTech Chris: youtube.com/c/RetroTechChrisCuteMouse driver: http://cutemouse.sourceforge.netDownload UASM: http://www.terraspace.co.uk/uasm.html#p2
Add a blowtorch to your gas grill! Dr. Daves Diversions 2020-12-19 | In this video I share how to add a trigger start blowtorch to a gas grill and run it from the grill's 20 lb. LP (propane) cylinder.
Artifacts of the Bridgeboards German Roots Dr. Daves Diversions 2020-12-18 | In this video I discover a software artifact ostensibly linked to the Commodore Amiga Bridgeboard's German roots, show how the [Unix] strings(1) command can be used as a forensic tool, and compare my Hong Kong-made A2088 XT Bridgeboard to Jan Beta's earlier German-made A2088.Regarding the software artifact, my hypothesis is that Commodore customized the assign command to work with the virtualized C: drive. Any other guesses?Related:Jan Beta: MS-DOS on an Amiga? The A2088 Bridgeboard #DOScemberyoutube.com/watch?v=3GiBgtTw6ac&t=3m57s (3m57s)Dave Haynie tells a story about the German Commodore team and Bridgeboard (begins at 24m13s):Dave Haynie Talks About Developing The Commodore Amigayoutube.com/watch?v=Rcr2CFV0T4I#t=24m13sCommodore Factory Braunschweig (1984)youtube.com/watch?v=dzep90YDUagFor more history of Amiga products, check out Brian Bagnall's fascinating book "Commodore: The Amiga Years."amazon.ca/Commodore-Amiga-Years-Brian-Bagnall/dp/0994031025
Whats YOUR OS timeline? Heres mine. Dr. Daves Diversions 2020-12-14 | In this video, I tell you about an experiment to share your "OS timeline" - which operating systems are you significantly familiar with and when were you using them?My thought was this would be interesting especially in the retrocomputing community, but may work for other communities too, either OS or other tools or artifacts.If you're interested in an example OS timeline text file, find mine in the pinned comment.(I posted this during #DOScember but it's not too much related to it, so is not tagged as such like my other videos.)Related:DaveJustDave: youtube.com/user/MrDavejustdaveThe Retro Channel: youtube.com/c/TheRetroChannelRetroTech Chris: youtube.com/c/RetroTechChrisCaffeinatedTech: youtube.com/user/CaffeinatedTechJan Beta: youtube.com/c/JanBeta
Outtake: Amiga ERROR CPU Too Expensive! Dr. Daves Diversions 2020-12-10 | Here's a rare and amusing (?) error from the Amiga "enforcer" utility if you have a 68040.This is an outtake originally prepared for this video:#DOScember x86 asm & Amiga Bridgeboard - part 1 (my intro to DOS)youtube.com/watch?v=NGk31dRc05ERelated:Dave Haynie tells about the first Commodore Amiga 68040 board (starting at 27m10s)Dave Haynie Talks About Developing The Commodore Amigayoutube.com/watch?v=Rcr2CFV0T4I#t=27m10sFusion Forty Amiga in 2020!youtube.com/watch?v=7xhsxuF_ML8
#DOScember x86 asm & Amiga Bridgeboard - part 1 (my intro to DOS) Dr. Daves Diversions 2020-12-10 | In this video I share the first part of my #DOScember 2020 project: reviving my Commodore A2088 XT Bridgeboard that I bought in 1990, running DOS 3.3, and testing it by running the first DOS application I wrote using x86 assembler (called minidraw).0:00 intro2:22 [re]installing the Bridgeboard4:42 booting up7:00 investigating user-startup sequence7:55 booting on 68000 with a floppy Bridgeboard disk8:15 on 68040: ERROR CPU too expensive (umm, thanks)10:02 on 68000: Bridgeboard boots from HD!11:12 installing DOS minidraw application (a good place to jump back in, after 68040 struggles)12:01 running minidraw with [text] video emulation13:46 switch from video emulation to a VGA card15:37 running Bridgeboard with VGA card, but keyboard and mouse via the Amiga16:34 working around drive "A:" missing by using DOS SUBST command17:10 running minidraw with VGA card18:36 next steps, hits & missesRelated:My #DOScember project playlist:youtube.com/playlist?list=PL2O6RH1Isy65p-cPxMx9HGlq9O_j9iVdxFusion Forty Amiga in 2020!youtube.com/watch?v=7xhsxuF_ML8Dave Haynie tells about the first Commodore Amiga 68040 board (starting at 27m10s)Dave Haynie Talks About Developing The Commodore Amigayoutube.com/watch?v=Rcr2CFV0T4I#t=27m10sTransferring Files between the Amiga and modern PCsyoutube.com/watch?v=L1dgVTdMUXM#t=28m30sRun PC DOS on the Amiga 2000 with A2088 and IDEyoutube.com/watch?v=4zbCSZrQTTMCommodore Cave - Amiga 1060 Sidecar IBM XTyoutube.com/watch?v=AKBc5Y6xmWkhttp://members.quicknet.nl/rhm.herold/computing/amiga/bridgeboard_faq.htmen.wikipedia.org/wiki/Emulation_on_the_Amiga#MS-DOS_on_Amiga_via_Sidecar_or_BridgeboardCommodore Amiga A500 A2000 Technical Reference ManualSection 4.1 Description of PC/XT Emulator for AMIGA 2000archive.org/details/CommodoreAmigaA500A2000TechnicalReferenceManual/page/n107/mode/2upCommodore Amiga A500 A2000 Technical Reference ManualSection 4.3 Janus.Libraryarchive.org/details/CommodoreAmigaA500A2000TechnicalReferenceManual/page/n129/mode/2up012 - subst commandyoutube.com/watch?v=1oOSBfiRPWoHow to use drive A: when you don't have a floppy driveblazingfibre.net/tech/subst.htm"SUBST A: C:\MYTEMP"Tricking out the Amiga 2500 Part 6 - Bridgeboardyoutube.com/watch?v=40CazTansYkVintage Computer Forum - VCWiki - Hardware - 8bit Friendly ISA VGA cardshttp://www.vcfed.org/forum/archive/index.php/t-26432.html
#DOScember x86 asm & Amiga Bridgeboard - my intro to DOS (part 0) Dr. Daves Diversions 2020-12-06 | In this video I talk about relying on MS-DOS to learn assembler programming (1988), then my first DOS computer (1990), the Commodore A2088D XT Bridgeboard, and, lastly, a project I plan for #DOScember 2020.I also talk a bit about the not-well-known Commodore Education Purchase Program c. 1990 that I took advantage of when I was in college to buy my Amiga 2000 as a bundle.0:00 DOScember intro1:24 the first DOS application I wrote2:46 the first DOS machine I owned: the XT Bridgeboard3:52 Commodore Education Purchase Plan5:42 my DOScember project idea6:30 Commodore sales brochures, etc.Next part here!#DOScember x86 asm & Amiga Bridgeboard - part 1 (my intro to DOS)youtube.com/watch?v=NGk31dRc05ERelated:My #DOScember project playlist:youtube.com/playlist?list=PL2O6RH1Isy65p-cPxMx9HGlq9O_j9iVdx#DOScember Kickoff Round Tableyoutube.com/watch?v=CkwZR0OKwUwFusion Forty Amiga in 2020!youtube.com/watch?v=7xhsxuF_ML8
Outtake: SD XMDZ DC-DC boost module temperature Dr. Daves Diversions 2020-12-03 | Some Keelog and Electroware PSUs for the Commodore 64 use the tiny "SD XMDZ" boost module to provided 12V DC from their internal 5V DC switching power supply.My experiments show the SD XMDZ is one of the hottest parts in the PSU, with its component temperatures measuring ~140F (+60C), +70F (+21C) over ambient temperature.This is an outtake originally prepared for this video:Electroware C64 "2-in-1" PSU heavy-duty mod (30 watts DC)youtube.com/watch?v=daE0QzkroB8
Electroware C64 PSU heavy-duty mod (30W DC power) Dr. Daves Diversions 2020-12-03 | In this video, I teardown Electroware's "2-in-1" PSU - a replacement power supply to simultaneously power a Commodore 64 and a floppy disk drive - and upgrade it to output 30 watts DC power.This modification allows you to use this one PSU to power both a 64 and an original 1541 modified for DC power, like a 1541-II. The original 1541 draws more power than the 1541-II and other drives, motivating this upgrade providing ~30 watts DC power rather than ~20 watts. It should also allow you to run power-hungry C64 cartridges and peripherals that draw 5V DC from the C64.In the process of this mod, I also remove the case from a Mean Well IRM-30-5ST switching power supply, so it will fit inside the Electroware PSU's case.0:00 intro1:37 comparing the Electroware 2-in-1 PSU to the Keelog Dual PSU2:55 Electroware PSU characteristics4:11 opening-up the Mean Well IRM-30-5ST switching power supply8:05 Electroware PSU teardown begins8:48 desoldering the IRM-20-5 and status LEDs10:13 removing the C64 power cable's pin header and soldering it, instead12:17 what we've done 'til this point (a good place to jump back in)13:10 fitting the IRM-30-5 into the Electroware case18:42 testing with IRM-30-5 in place of the IRM-20-521:25 testing component temperatures (for 1.5 hours) with the C64 and 1541 load23:14 rearranging the status LEDs24:40 isolating the IRM-30-5 from the Electroware PCB25:51 revisiting the status LEDs (oops!)27:07 IMPORTANT: heat shrink the MW power supply's low and high voltage soldered pins!27:31 reassembling the case with long machine screws instead of the original self-tapping screws30:32 it's done!31:10 conclusion, hits & missesRelated:Commodore 1541-DC: a 1541 mod for DC power, like the 1541-IIyoutube.com/watch?v=0t6zxi5-aD0Keelog Dual PSU mod to power C64 & 1541-DC(I don't recommend this PSU for use with C64 due to the Keelog's AC output voltage being too high on, at least, standard U.S. or Australian mains voltages)youtube.com/watch?v=GjS5O6yq7rQEarly Commodore 64 issue with Keelog power supply high AC output voltageyoutube.com/watch?v=Ld-oRmPJe7wIRM-30 Series Datasheet by MEAN WELL USA Inc. (digikey.com)digikey.com/htmldatasheets/production/2501754/0/0/1/irm-30-series-datasheet.htmlMore Electroware Power (breadbox64.com)breadbox64.com/blog/more-electroware-powerSven Petersen's global (115V/230V) power supply design (github.com)github.com/svenpetersen1965/C64-PSU-GlobalSven Petersen's 230VAC power supply design (github.com)github.com/svenpetersen1965/C64-replacement-PSU-230VAC-
LG G6 USB & Battery Repair (20x speed) Dr. Daves Diversions 2020-11-18 | On my LG G6 smartphone, I replace the USB/charging port, that was loose and no longer fast charging, and replace the battery while I'm at it.This is at 20x speed. It took 37 minutes in realtime.0:00 removing the OtterBox case and the SIM card and tray0:02 using a rework station (heat gun) to heat the back cover (to warm and loosen the adhesive)0:10 prying up the back cover0:17 removing the (11) screws0:29 removing the speaker and upper antenna assemblies0:30 prying up the (4) flex cable connectors0:36 removing the motherboard0:39 opening the new USB board package0:42 removing the old USB board0:44 installing the new USB board0:50 removing the old battery1:04 installing the new battery1:07 reinstalling the motherboard1:10 reconnecting the (4) flex cable connectors1:17 temporarily reinstalling the back cover (to see if things are working)1:22 power off and removing back cover again1:23 reinstalling the upper antenna and speaker assemblies1:27 reinstalling the (11) screws1:40 reinstalling the back cover1:43 reheating the back cover (to rewarm the adhesive)1:46 pressing the back cover down to the adhesive1:48 power on1:50 plug in USB chargerI decided not to remove the sticky waterproof seal and replace it with tape, since it was intact and sticky when rewarmed, and I always keep my phone in an OtterBox case anyway (and don't expect it to be perfectly waterproof).Here are the videos I used to learn how to do these repairs/replacements:LG G6 Battery Replacement Guideyoutu.be/uDmffgGyFZMLG G6 USB Board / Charging Port Repair Guideyoutube.com/watch?v=Y0oC4nPMXzM
Lights Out: How Not to Use a Multimeter :) Dr. Daves Diversions 2020-11-11 | Watch the first 15 seconds for the fun.Stay for the explanation. :)
Keelog Dual PSU mod to power C64 & 1541-DC Dr. Daves Diversions 2020-11-10 | In this video, I teardown, upgrade, and measure a Keelog dual PSU - a replacement power supply for the Commodore 64 plus a floppy disk drive.This modification allows you to use this one PSU to power both a 64 and an original 1541 modified for DC power, like a 1541-II. The original 1541 draws more power than the 1541-II and other drives, motivating this upgrade providing ~30 watts DC power rather than ~20 watts.0:00 intro0:43 problem and motivation5:04 Keelog dual PSU teardown and analysis9:51 swapping the Mean Well IRM-20-5 for an IRM-30-511:08 measuring power draw using 1541 CHECK DISK utility15:24 what's next? (Electroware C64 PSU & 1541-II PSU "2-in-1")Related:Commodore 1541-DC: a 1541 mod for DC power, like the 1541-IIyoutube.com/watch?v=0t6zxi5-aD0TheRetroChannel's Commodore 64 Keelog replacement power supply review:youtube.com/watch?v=eJ9nWh_k_J8
Service Engine Soon: my 1989 Trans Am GTA Dr. Daves Diversions 2020-11-09 | In this video, I show my modified 1989 Pontiac Firebird Trans Am GTA, semi-affectionately known as "Service Engine Soon."0:00 intro0:09 under the hood0:38 a bit about the '89 GTA1:37 ignition2:06 exhaust2:28 about acquiring it2:44 I go fast in a straight line (0-90 mph)3:12 a bit more about features and showing the carI keep it stored, and put a few tens of miles on it a year, generally right after I charge the battery, check it over, and get it ready, well, for storage again.It has a bit under 80k miles on its odometer.I forgot to mention in the video that it also has a mild street performance transmission from Bowtie Overdrives.
