Dr. Daves Diversions
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.
updated 3 years ago
ultimate64.com/Firmware
https://assembly64.hackerswithstyle.se/assembly/
Untrimmed original video here:
youtu.be/uqZ-I4oiK0E
Shout out to Matt @retrobitstv turning me on to this new firmware released Dec. 28 2023!
youtube.com/live/QPYBGaRYCTM
Ray @CallousCoder also published a video on it!
youtu.be/CgzNg305L2Y
Gideon (creator of the Ultimate II+, Ultimate 64, etc.) is a legend. :)
ultimate64.com/Firmware
https://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/QPYBGaRYCTM
Ray @CallousCoder also published a video on it!
youtu.be/CgzNg305L2Y
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
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
* 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
Tank Mouse - your new Amiga mouse
kickstarter.com/projects/lukas-remis/tank-mouse-your-new-amiga-mouse
In 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.
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/
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 intro
02:03 teardown/disassembly and finding the failure
07:33 on the bench, review of the PCB repairs
13:43 second try (finishing the repair)
16:00 discussing the design problem
Related:
Repairing broken traces on a circuit board (Branchus Creations)
youtube.com/watch?v=ref9JHUf-uw
How to Repair a Cracked or Broken Circuit Board (The Lightning Stalker)
youtube.com/watch?v=g6_piarjTKI
Repairing a Minor Crack On A Circuit Board PCB. Fix Repair Printed Circuit Board (NorCal715)
youtube.com/watch?v=daDYTK0PIX0
Honeywell Oil Radiator Heater Wouldn't Turn On. (Very) Easy Fix! (Measure Once Cuss Twice)
youtube.com/watch?v=g2P0bl_1nx0
Related:
Fairchild Channel F (wikipedia)
en.wikipedia.org/wiki/Fairchild_Channel_F
Fairchild F8 (wikipedia)
en.wikipedia.org/wiki/Fairchild_F8
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-bar
Novasaur: 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-afe7712e29df
Novasaur CP/M TTL Retrocomputer (Hackaday.io)
hackaday.io/project/164212-novasaur-cpm-ttl-retrocomputer
How the Gigatron TTL Microcomputer Works (Hackaday.com)
hackaday.com/2019/03/25/how-the-gigatron-ttl-microcomputer-works
Gigatron I/O and RAM expander (Hackaday.io)
hackaday.io/project/164176-gigatron-io-and-ram-expander
The Gigatron TTL microcomputer
gigatron.io
Solid State Machines (Alastair's site; kits expected to be available late 2022)
solidstatemachines.com
Related:
THE VINTAGE COMPUTER FESTIVAL MIDWEST (vcfmw.org)
http://vcfmw.org
COMPOSITE VIDEO MOD V2.1 - ATARI 2600/7800 (TFW8b.com)
thefuturewas8bit.com/atari-composite-video-mod.html
Odyssey2 DELUXE AV Mod (The Taylor and Amy Show)
youtube.com/watch?v=DUT7NaYnOhY
RetroTINK-2X Pro (retrotink.com)
retrotink.com/product-page/retrotink-2x-pro
TinyCOMP – 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=GXVS1jthHkc
TinyComp the RF TV output converter to Composite (Rudy's Retro Intel)
youtube.com/watch?v=g0BHWYaiiIk
Inside a 1st gen Pong TV video game experience (Dr. Dave's Diversions)
youtube.com/watch?v=HCZiJYoOOWE
Tandy Electronic TV Scoreboard - #SepTandy - #SepTandy2021 (CRG channel)
youtube.com/watch?v=Q6m-mhLbPe0
Frank's 3D shop
youtube.com/c/Franks3Dshop
Frank's Playground
youtube.com/channel/UCGWc3-CisXiKtmjRUpL1fVQ
GIMINI (1978 General Instrument Corp.) AY-3-8500/8600
http://www.pong-story.com/GIMINI1978.pdf
Philips 2000T Composite Video Mod
http://blog.worldofjani.com/?p=6288
http://blog.worldofjani.com/wp-content/uploads/2021/05/P2000_tfw8b.jpg
Philips Videopac G7000 Composite Video Mod (worldofjani.com)
http://blog.worldofjani.com/?p=6438
Binatone TV Master MK 4 Composite Video Mod
petervis.com/gallery/Toys_and_Games/binatone-tv-master-mk-4-composite-video-mod/binatone-tv-master-mk-4-composite-video-mod.html
old-computers.com/museum/computer.asp?c=1037&st=3
Amiga2MacFloppy (github.com)
github.com/Franks3dShop/Amiga2MacFloppy
Amiga2MacFloppy (pcbway.com)
pcbway.com/project/shareproject/Amiga2MacFloppy.html
Floppy Emu Disk Emulator
bigmessowires.com/floppy-emu
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.
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-practice
Apple 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
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 HIRES
2 SET HEADING TO 0
3 MOVE TO 80-130
4 PEN DOWN
5 CALCULATE X=0
6 LABEL DRAW
7 FORWARD 50
8 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 POSTROT
13 ROTATE LEFT D
14 LABEL POSTROT
15 CALCULATE X=X+1
16 TEST IF (X=100)
17 IF FALSE JUMP DRAW
18 STOP
Related:
"Plotting Pi and Searching for Mona Lisa - Numberphile"
youtube.com/watch?v=tkC1HHuuk7c
The 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.html
q(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
Another experiment with #shorts... back to your regularly scheduled program. :)
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. :)
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 intro
00:14 introlude
00:49 background
03:28 the CGA card and the Motorola CRTC IC
06:30 minidraw and the challenge of converting a PNG image for it and CGA frame buffer
13:45 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 try
19:26 debugging based on visual "glitch effects", 2nd try
23:46 [un]wrapping things up
The script we share in this video is here:
PNGtoCGA640x200
pastebin.com/Hu9nVECu
MiniDraw (assembler DOS application):
minidraw.asm revision 1.10 (white on black for better CGA/TGA compatibility)
pastebin.com/t4Cpzswn
minidraw manual (retyped from 1988 original)
pastebin.com/PN53qtg5
The Easter egg was hidden in 2020, in part 2 of this project:
#DOScember x86 asm & Amiga Bridgeboard
youtube.com/playlist?list=PL2O6RH1Isy65p-cPxMx9HGlq9O_j9iVdx
Related:
CGA Graphics - Not as bad as you thought! (8-bit Guy)
youtube.com/watch?v=niKblgZupOc
Color Graphics Adapter (wikipedia)
en.wikipedia.org/wiki/Color_Graphics_Adapter
Colour Graphics Adapter: Notes (John Elliott's homepage)
seasip.info/VintagePC/cga.html
PC System Programming for developers (See Chapter 10: "Accessing and Programming the Video Cards")
by Tischer, Michael, 1953-
Publication date 1990
archive.org/details/PC_System_Programming
Chapter 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.pdf
Motorola 6845
en.wikipedia.org/wiki/Motorola_6845
IBM's CGA Hardware Explained (Nerdly Pleasures)
http://nerdlypleasures.blogspot.com/2016/05/ibms-cga-hardware-explained.html
IBM PC Color Composite Graphics (Nerdly Pleasures)
http://nerdlypleasures.blogspot.com/2013/11/ibm-pc-color-composite-graphics.html
The original #DOScember logo was created by DaveJustDave.
youtube.com/user/MrDavejustdave
Glitch Effect: Delving Into The Digital Image Distortion
blog.123rf.com/image-glitch-effect
00:00 intro
00:15 introlude
00:56 the equipment and plan
02:35 phase 0: putting wheels on the lift
04:19 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 up
Related:
Rove to (dis)advantage [Luff tackle] (Wikipedia)
en.wikipedia.org/wiki/Block_and_tackle#Rove_to_(dis)advantage
Why Snatch Blocks are AWESOME (Smarter Every Day)
youtube.com/watch?v=M2w3NZzPwOM
Axle Hitch Tow Rope - Useful Knot for Dragging Heavy Objects - or Emergency Towing (Johnny Debt)
youtube.com/watch?v=uGChmSC5oL0
Filmed at the Vintage Computer Festival Midwest: VCF Midwest 16, September 11, 2021
http://vcfmw.org
00:00 intro
00:13 an introlude
02:22 Commodore PET
02:55 another PET
03:27 modern C64 game author
03:53 Forgotten Machines
04:15 How the 8-Bit Demoscene Works (David Murray)
05:13 TRS-80 Model III
06:02 DEC VT 420
07:22 Vintage Computer YouTubers Discussion Panel (8-Bit Guy, LGR, and Ken from Computer Clan)
08:01 DEC VT100
08:50 Amiga 2000, Commodore 128D, Commodore SX-64, MSD floppy drive
09:18 MITS Altair 8800 replica
11:14 TRS-80 Model 4P
11:38 Ultimate Networking with GEOS (Cenbe)
13:05 Atari XE System
13:57 A-Max cartridge (Mac emulator for Amiga)
14:50 TeleVideo Rises Again: Recreating a lost machine (Pat Finnegan)
15:56 Acorn A3000
18:03 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-e8
cc65 library for accessing the DOS and network functions of the Ultimate II+ cartridge and Ultimate 64 motherboard
github.com/xlar54/ultimateii-dos-lib
Acorn Archimedes / A3000
en.wikipedia.org/wiki/Acorn_Archimedes#A3000
The 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
Filmed at the Vintage Computer Festival Midwest: VCF Midwest 16, September 11, 2021
http://vcfmw.org
Here'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 30
10 for col = 1 arg(1)
12 prompt " "
14 next
20 print "Welcome to VCF Midwest!"
25 return
30 for x = 0 55
40 10(x)
50 next
60 for x = _56 _1
70 10(_x)
80 next
Related:
bas man page (v7 UNIX)
unix.com/man-page/v7/1/bas
"No BS: the First UNIX BASIC!"
youtube.com/watch?v=LZUMNZTUJos
00:00 intro
00:31 an introlude
00:55 channel update
03:11 washing machine problem
04:40 starting the drain pump repair
12:38 testing the repair
14:20 original pump tear-down
17:50 sign-off
Details:
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, TJ137108100
Related:
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-shirt
f*** traceroute t-shirt: thousandeyes.com/tshirt
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=aXWqZtBwdjA
00:00 intro
00:18 an introlude
00:41 channel update
03:08 Attack of the PETSCII Robots - Apple ][ edition
04:00 the Apple 2000 Apple ][+ Emulator
07:30 running ApImU on the Amiga
13:05 running a2robots under Apple 2000
14:15 game play on RGB and composite video
17:52 conclusion and "What's next?"
Related:
4 Geeks in a Podcast - Reverse Engineering (Joe's Computer Museum)
youtube.com/watch?v=t93Rvm_IdFM
retrobits (Matt): youtube.com/c/retrobitstv
Temporarily Offline (Steve): youtube.com/c/temporarilyoffline
Joe's Computer Museum: youtube.com/c/JoesComputerMuseum
Frank's 3D Shop: youtube.com/c/Franks3Dshop
Frank's Playground: youtube.com/channel/UCGWc3-CisXiKtmjRUpL1fVQ
PETSCII Robots for Apple ][
http://www.the8bitguy.com/26654/petscii-robots-for-apple-ii-now-available
Credits: 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/975620876261750
Apple 2000 v1.7 Apple ][+ Emulator: http://aminet.net/package/misc/emu/Apple2000
Apple 2000-based Apple //e Emulator: http://aminet.net/package/misc/emu/Apple2000e
Apple ][ disk image file utility: http://aminet.net/package/misc/emu/App8ImU
Attack of the PETSCII Robots... on the Apple IIe Card for Macintosh? (Ron's Computer Videos)
youtube.com/watch?v=F_Fyoqu8IQA
Getting Total Replay working on the Apple IIe Card for Macintosh (Ron's Computer Videos)
youtube.com/watch?v=LJIKQLy6zH0
8-Bit Retro Journal: youtube.com/c/8BitRetroJournal
The #AMayGA playlist: youtube.com/hashtag/amayga
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 Intro
02:35 demonstrating the "wavy" character problem
03:05 the new character ROM (DIP) from eBay
03:40 C64 breadbin disassembly
06:10 installing the replacement ROM
06:40 C64 reassembly and Pennsylvania-manufactured serial number on case
07:38 testing the replacement ROM
07:55 comments about (a) voltage regulator heat problems and (b) problems with the RESTORE key
10:35 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 tabs
dfarq.homeip.net/how-to-open-a-commodore-64-or-vic-20
TheRetroChannel: Commodore 64 troubleshooting part 1 - the basics
youtube.com/watch?v=sUyRKXOl-PI
From the first BASIC to Casio fx-4000P calculator!
youtube.com/watch?v=jsg6Xgev7CU
Electroware C64 PSU heavy-duty mod (30W DC power)
youtube.com/watch?v=daE0QzkroB8
Be cool, Honey Bunny: Customized C64 Heatsinks
youtube.com/watch?v=F5tjHWYBYx8&t=4m21s (4m21s)
Hearsay 1000 voice synthesis and recognition for the C64
youtube.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=GHhhidIybzU
Restoring 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/adriansdigitalbasement
TheRetroChannel (Mark) youtube.com/c/TheRetroChannel
iz8wdf (Frank) youtube.com/c/iz8dwf
00:00 intro
00:32 a #MARCHintosh montage (introlude)
00:58 intro continued
04:00 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 beyond
Related:
Mac Startup Chimes Ambient (music by chuppified, used by permission)
youtube.com/watch?v=TqEcEAipwpw
Tutorial: Cleaning, lubricating and fixing an Apple 800k 3.5" floppy drive (Adrian's Digital Basement)
youtube.com/watch?v=0pGhwtyFG2I
Jeremy's Retro Bar (#MARCHintosh video featuring Floppy Emu)
youtube.com/watch?v=d65ze2nuKp8
Floppy Emu
bigmessowires.com/floppy-emu
Ron's Computer Videos
youtube.com/c/RonsComputerVideos
ReTroLab (Guillaume's channel)
youtube.com/channel/UCi4UXu2kIcYnOlCyGl_MpIw
retrobits (Matt's channel)
youtube.com/c/retrobitstv
AVE - Amateur Vintage Electronics (Michael's channel)
youtube.com/channel/UCwJgaQ2Os28__i8NcO5CVVQ
#MARCHintosh Event Logo concept and design by Javier Rivera
YouTube: youtube.com/channel/UC550QsLjbk-zxUv4u717EJQ
Twitter: @javierivera
A #MARCHintosh playlist
youtube.com/hashtag/marchintosh
Will the luck 'o the Irish be with me? Let's see!
00:00 intro
00:28 a #MARCHintosh montage (introlude)
00:53 intro to the Asante EN/SC Ethernet NIC and this project
06:06 the Asante EN/SC on the Amiga
14:42 diagnostic attempt under A-Max using System 6.0.8
15:52 Asante EN/SC teardown
24:07 wrap-up and upcoming #MARCHintosh topics
Come join us for the month-long retro Macintosh celebration!
marchintosh.com
Xerox Alto (wikipedia.org)
en.wikipedia.org/wiki/Xerox_Alto
Ethernet (wikipedia.org)
en.wikipedia.org/wiki/Ethernet
Robert Metcalfe (wikipedia.org)
en.wikipedia.org/wiki/Robert_Metcalfe
Mark's TheRetroChannel
youtube.com/c/TheRetroChannel
Joe's Computer Museum
youtube.com/c/JoesComputerMuseum
#MARCHintosh Event Logo concept and design by Javier Rivera
YouTube: youtube.com/channel/UC550QsLjbk-zxUv4u717EJQ
Twitter: @javierivera
A #MARCHintosh playlist
youtube.com/hashtag/marchintosh
00:00 intro
00:43 a #MARCHintosh montage (introlude)
01:08 this project and my intro to the Mac mouse
04:40 building the Mac M0100 mouse to Amiga converter/connector
08:37 the mouse in A-Max action
10:45 wrap-up, Mac Plus performance challenge, and upcoming #MARCHintosh topics
Come join us for the month-long retro Macintosh celebration!
marchintosh.com
youtube.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 History
512pixels.net/2012/11/mouse
Mac Plus Mouse Alternatives - HAS THE "Amiga mouse adapter" TABLE I USED!
web.archive.org/web/20130210064705/http://blog.syrinxsystems.co.uk/mac-plus-mouse-alternatives
Resurrecting my Macintosh Plus : Mouse
https://blog.rekawek.eu/2016/12/08/mac-plus/
Bus Mouse (Apple)
deskthority.net/wiki/Bus_mouse#Apple
ReTroLab (Guillaume's channel)
youtube.com/channel/UCi4UXu2kIcYnOlCyGl_MpIw
The fastest Mac Plus ever?
youtube.com/watch?v=JAk8n5CWMAI
#MARCHintosh Event Logo concept and design by Javier Rivera
YouTube: youtube.com/channel/UC550QsLjbk-zxUv4u717EJQ
Twitter: @javierivera
00:00 intro
00:28 a #MARCHintosh montage
00:54 catching-up with my channel
04:20 the A-Max cartridge and Mac ROMs
08:03 booting the system
11:07 booting System 6.0.5 and a look around
13:41 benchmarking the system
14:54 The tests are done!
17:25 running apps like it's 1991
24:25 Mac Plus Speedometer challenge
24:50 my upcoming #MARCHintosh topics
Some stats to beat, as measured by Speedometer 3.06:
Speedometer's combined Performance Rating: 12.117
CPU, times faster than Mac Classic: 16.373
BenchMark Mix: ave. times faster than Classic: 19.119
Come join us for the month-long retro Macintosh celebration!
marchintosh.com
Related:
10 Minute Amiga Retro Cast EP 38: SCSI2SD for your Amiga
youtube.com/watch?v=R4w5EZJkNC0
Commodore Doctor - Let's give these units a checkup and diagnosis LIVE
youtube.com/watch?v=7Q9PTgz384c&list=PL2O6RH1Isy65x7DsdNEHab7pm1bAwiGRE
Fusion Forty Amiga in 2020!
youtube.com/watch?v=7xhsxuF_ML8&list=PL2O6RH1Isy66J0UDsqUbcBHhbEuSWQg5_
Ron's Computer Videos
youtube.com/c/RonsComputerVideos
Joe's Computer Museum
youtube.com/c/JoesComputerMuseum
The Fastest Apple Mac is an Amiga - Fact or Fiction? (RMC)
(Mac LC III; 68030 @ 12MHz vs. Amiga 1200; 68EC020 @ 14MHz)
youtube.com/watch?v=Jph0gxzL3UI
Apple Macintosh Plus (ED) Specs
everymac.com/systems/apple/mac_classic/specs/mac_plus.html
The "Official" A-Max Home Page
crossconnect.tripod.com/AMAXHOME.HTML
#MARCHintosh Event Logo concept and design by Javier Rivera
YouTube: youtube.com/channel/UC550QsLjbk-zxUv4u717EJQ
Twitter: @javierivera
A #MARCHintosh playlist
youtube.com/hashtag/marchintosh
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=jsg6Xgev7CU
00:00 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.
00:00 intro
02:00 the birth of BASIC and the DTSS
04:41 running and fixing a 1960s-era BASIC program on the C64
07:29 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-4000P
18:23 running the program head to head - C64 vs. fx-4000P
19:42 parting thoughts
Pocket Computers from the 1980s (The 8-Bit Guy)
youtube.com/watch?v=d3NIe1jTZMc
Birth of BASIC (~40 mins, Dartmouth)
youtube.com/watch?v=WYPNjSoDrqw
BASIC at 50 (4 mins, Dartmouth)
youtube.com/watch?v=gxo9LVIgOiI
Casio fx-4000p (rskey.org)
http://rskey.org/fx4000p
http://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.html
fx-4000p Owner's Manual
casio.ledudu.com/images/pockets/casio/manuels/fx4000p.pdf
fx-7000g Owner's Manual, Chapter 4: Program Computations
web.archive.org/web/20031216054750/http://www.silrun.de/casio/fx7000/manual/Chapter4.pdf
Casio fx-7000G - The World's First Graphing Calculator (Calculator Culture)
youtube.com/watch?v=NQsP0r4X60E
The 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.pdf
Quintic Equation
mathworld.wolfram.com/QuinticEquation.html
00:00 intro
01:42 warning notice
02:00 the problem and modifications
04:51 removing the valve orifices
05:32 orifice sizes and BTUs
06:45 drilling new valve orifices
10:07 testing the grill with modified orifice
11:08 choppin' wood chunks
12:08 putting the meat on (starting the 6.5 hour cook)
14:15 wrapping the meat
15:35 slicing
16:50 retrogrilling wrap-up
Related:
Add a blowtorch to your gas grill! (also shows lighting cold smoke generator)
youtube.com/watch?v=HBn6Tfl0EUg
Propane/Natural Gas Conversion (GrillParts.com)
"Click Here to See Our BTU and Orifice Size Guide"
grillparts.com/howto/conversion.htm
Orifice Drill Size Chart (KeyGas.com)
keygas.com/wp-content/uploads/2016/12/Drill_Chart-1.pdf
Conversion Chart (Drill Size to LP gas BTUs, AndersonForrester.com)
andersonforrester.com/conversion-chart
CLAGrills.com (where I bought my new valve orifices)
clagrills.com
The "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.pdf
Propane and Gas Conversion Basics (How to)
youtube.com/watch?v=Et4rBQovAHY
Drilling a gas orifice (2 min)
youtube.com/watch?v=-OZ2CUi-Qvk
Big Kahuna Cold Smoke Generator (SmokeDaddyInc.com)
smokedaddyinc.com/product/big-kahuna-cold-smoke-generator
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 intro
01:20 rediscovering its origin
03:30 comments and stories from Dick Haight
05:50 getting UNIX System III up and running
07:53 running bs interactively
09:58 programming in bs
16:39 implementing sprintf in bs
21:50 Fibonacci sequence (recursion)
22:04 parting bs thoughts
UNIX System III on PDP-11 (the instructions and tape image used in the video)
http://a.papnet.eu/UNIX/sysIII_pdp11/Installation
99 bottles of bs (builtins method, 1996 version)
pastebin.com/HPVCjynX
99 bottles of bs (sprintf method)
pastebin.com/fxDgwBDd
bs implementation of sprintf (local variables method; broken?)
pastebin.com/NHk9Pf7q
99 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%29
bs(1) man page in UNIX User Manual Release 3 Jun 1980
http://bitsavers.informatik.uni-stuttgart.de/pdf/att/unix/System_III/UNIX_Users_Manual_Release_3_Jun80.pdf
bs(1) man page in AIX 7.2
ibm.com/support/knowledgecenter/ssw_aix_72/b_commands/bs.html
bs(1) man page in HP-UX Release 11i (December 2000)
http://h10032.www1.hp.com/ctg/Manual/c00386893.pdf
Dick Haight's blog
http://dicks-raspberry-pi.blogspot.com
Dick Haight on The Unix Heritage Society (TUHS) Wiki:
wiki.tuhs.org/doku.php?id=people:dick_haight
These images used by permission of Faces of Open Source / Peter Adams ( peteradamsphoto.com ):
facesofopensource.com/doug-mcilroy
facesofopensource.com/ted-dolotta
facesofopensource.com/brian-kernighan
facesofopensource.com/john-mashey
facesofopensource.com/steve-johnson
facesofopensource.com/rudd-canaday
Unix Playing Cards
blog.dshr.org/p/unix-p.html
System 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/)
00:00 intro
03:35 getting 7th Edition of UNIX up and running under a pdp-11 simulator
06:40 running bas interactively
07:52 programs in bas
08:12 99 bottles: goto method
10:36 99 bottles: for loop method
12:30 99 bottles: function method
15:33 summary and what's next
bas man page (v7 UNIX)
unix.com/man-page/v7/1/bas
99 bottles of bas (goto method)
pastebin.com/YKwmLmZi
99 bottles of bas (for loop method)
pastebin.com/6DWTugrQ
99 bottles of bas (functions method)
pastebin.com/SrwdPvp5
99 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
VCF East 2019 -- Brian Kernighan interviews Ken Thompson
youtube.com/watch?v=EY6q5dv_B-o
Sanos PDP-11 Simulator with UNIX V7
http://www.jbox.dk/sanos/pdp11.htm
Michael Ringgaard's web site:
http://www.jbox.dk/
"A Research UNIX Reader: Annotated Excerpts from the Programmer’s Manual, 1971-1986" by M. Douglas McIlroy
https://www.cs.dartmouth.edu/~doug/reader.pdf
These images used by permission of Faces of Open Source / Peter Adams ( peteradamsphoto.com ):
facesofopensource.com/ken-thompson-3
facesofopensource.com/doug-mcilroy
bas 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/
00:00 intro
04:00 General Instrument SP1000
04:45 Lis'ner 1000 (ancestor of the Hearsay 1000?)
06:00 Hearsay history
08:40 fixing the RESTORE key (necessary for Hearsay 1000)
09:55 running a Hearsay 1000 demo
12:38 Hearsay 1000 training and testing with Google Home
16:38 YAY! The 64 relays my spoken command to the Google Home!
17:25 concluding thoughts
Related:
Adrian's Digital Basement - Mail Call #2 (Jan 2020)
youtube.com/watch?v=shfzfdaZGYM#t=1m
Mikes Retro Tech: C64 Magic Voice Cartridge
youtube.com/watch?v=uvNLnGdJcRY
Inside a 1st gen "Pong" TV video game experience (based on another General Instrument IC)
youtube.com/watch?v=HCZiJYoOOWE
General Instrument ads for the SP1000, etc.:
http://www.ferretronix.com/tech/chips
Speech Synthesizers For the Commodore Computers Part II by Morton Kevelson (Ahoy! Magazine 1986, page 32)
commodore.ca/gallery/magazines/ahoy/Ahoy-issue-25-01.pdf
Speech Synthesizers for the Commodore Computers by Morton Kevelson (Ahoy! Magazine 1986, page 33)
commodore.ca/gallery/magazines/ahoy/Ahoy-issue-24-01.pdf
Ciarcia's Circuit Cellar: The Lis'ner 1000 (Byte Magazine, Nov. 1984):
web.archive.org/web/20190421033230/http://www.appleii-box.de/APPLE2/H221TheListner1000/TheListner1000.pdf
worldradiohistory.com/hd2/IDX-Consumer/Archive-Byte-IDX/IDX/80s/84-85/Byte-1984-11-OCR-Page-0119.pdf
Restoring 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.pdf
Any mistaken conclusions about the the history are my own, but are based on my readings of others. Please post corrections as comments.
00:00 intro
00:44 the Radio Shack Electronic TV Scoreboard
05:22 a "new" Bentley 4.5" B&W TV
07:20 outside the TV Scoreboard
09:16 inside the TV Scoreboard
11:54 the GI AY-3-8500-based game console in action
13:05 the hidden handicap variation of the hockey/foosball/soccer game
13:26 the weird CRT spot bug/issue with the Bentley TV
14:05 significance of these devices and conclusion
15:04 just a glimpse of spelunking in my basement crawlspace
Related:
Atari’s Home Consoles Before the 2600 (Operation 8-Bit)
youtube.com/watch?v=S3QuZrNmOKE
Video 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-history
The 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-games
PONG in a Chip (Pong-Story.com)
http://www.pong-story.com/gi.htm
The Pong Museum
http://PongMuseum.com/
First generation of video game consoles (Wikipedia)
en.wikipedia.org/wiki/First_generation_of_video_game_consoles#Coleco_Telstar_series
AY-3-8500 (Wikipedia)
en.wikipedia.org/wiki/AY-3-8500
APF 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 television
youtube.com/watch?v=vPohP0y9aB8
Fixing the 9" PET's monitors turn-off spot (With Adrian Digital Basement)
youtube.com/watch?v=WULJxrQkQeg
Really fixing the CRT spot on the Commodore PET 2001
youtube.com/watch?v=tBs8TisaDE4
First Look: PONG Clone - AY-3-8500 Decap and AI Mapping by Cole Johnson
youtube.com/watch?v=aWVxMIlokds
Pong On A Chip Teardown - The Electronics Inside
youtube.com/watch?v=waZW6umb_9I
A (slightly late) Christmas present (blogspot.com)
nerdstuffbycole.blogspot.com/2020/01/end-of-year-update.html
MiSTer FPGA Hardware (RetroRGB.com)
retrorgb.com/mister.html
00:00 intro
02:03 fixing the invisible mouse pointer
03:36 ... a minidraw CGA 640x200 2-color mode issue
06:45 ... a minidraw FREEdrawing issue with the mouse
08:14 a MS-DOS 720k floppy sneakernet solution: Linux to Amiga to MS-DOS
09:57 framing the DOS programming environment
11:17 running the assembler (UASM) and building minidraw
14:04 assembler source code overview using minidraw.asm
17:53 ... a sample BIOS function invocation
19:14 ... finding which BIOS and DOS functions an assembler program uses
20:27 a sample code revision: fixing the CGA 2-color mode issue
24:00 testing the revised minidraw application, first on Bridgeboard @ 4.77 MHz
25:46 ... on Tandy 1000 HX @ 7.16MHz with RetroTech Chris
26:16 conclusions, misses & hits
29:30 ... a special #DOScember gift for you
MiniDraw (assembler DOS application):
minidraw.asm revision 1.10 (white on black for better CGA/TGA compatibility)
pastebin.com/t4Cpzswn
minidraw manual (retyped from 1988 original)
pastebin.com/PN53qtg5
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.)
Related:
My #DOScember project playlist:
youtube.com/playlist?list=PL2O6RH1Isy65p-cPxMx9HGlq9O_j9iVdx
DaveJustDave: youtube.com/user/MrDavejustdave
RetroTech Chris: youtube.com/c/RetroTechChris
CuteMouse driver: http://cutemouse.sourceforge.net
Download UASM: http://www.terraspace.co.uk/uasm.html#p2
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 #DOScember
youtube.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 Amiga
youtube.com/watch?v=Rcr2CFV0T4I#t=24m13s
Commodore Factory Braunschweig (1984)
youtube.com/watch?v=dzep90YDUag
For 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
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/MrDavejustdave
The Retro Channel: youtube.com/c/TheRetroChannel
RetroTech Chris: youtube.com/c/RetroTechChris
CaffeinatedTech: youtube.com/user/CaffeinatedTech
Jan Beta: youtube.com/c/JanBeta
This is an outtake originally prepared for this video:
#DOScember x86 asm & Amiga Bridgeboard - part 1 (my intro to DOS)
youtube.com/watch?v=NGk31dRc05E
Related:
Dave Haynie tells about the first Commodore Amiga 68040 board (starting at 27m10s)
Dave Haynie Talks About Developing The Commodore Amiga
youtube.com/watch?v=Rcr2CFV0T4I#t=27m10s
Fusion Forty Amiga in 2020!
youtube.com/watch?v=7xhsxuF_ML8
0:00 intro
2:22 [re]installing the Bridgeboard
4:42 booting up
7:00 investigating user-startup sequence
7:55 booting on 68000 with a floppy Bridgeboard disk
8:15 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 emulation
13:46 switch from video emulation to a VGA card
15:37 running Bridgeboard with VGA card, but keyboard and mouse via the Amiga
16:34 working around drive "A:" missing by using DOS SUBST command
17:10 running minidraw with VGA card
18:36 next steps, hits & misses
Related:
My #DOScember project playlist:
youtube.com/playlist?list=PL2O6RH1Isy65p-cPxMx9HGlq9O_j9iVdx
Fusion Forty Amiga in 2020!
youtube.com/watch?v=7xhsxuF_ML8
Dave Haynie tells about the first Commodore Amiga 68040 board (starting at 27m10s)
Dave Haynie Talks About Developing The Commodore Amiga
youtube.com/watch?v=Rcr2CFV0T4I#t=27m10s
Transferring Files between the Amiga and modern PCs
youtube.com/watch?v=L1dgVTdMUXM#t=28m30s
Run PC DOS on the Amiga 2000 with A2088 and IDE
youtube.com/watch?v=4zbCSZrQTTM
Commodore Cave - Amiga 1060 Sidecar IBM XT
youtube.com/watch?v=AKBc5Y6xmWk
http://members.quicknet.nl/rhm.herold/computing/amiga/bridgeboard_faq.htm
en.wikipedia.org/wiki/Emulation_on_the_Amiga#MS-DOS_on_Amiga_via_Sidecar_or_Bridgeboard
Commodore Amiga A500 A2000 Technical Reference Manual
Section 4.1 Description of PC/XT Emulator for AMIGA 2000
archive.org/details/CommodoreAmigaA500A2000TechnicalReferenceManual/page/n107/mode/2up
Commodore Amiga A500 A2000 Technical Reference Manual
Section 4.3 Janus.Library
archive.org/details/CommodoreAmigaA500A2000TechnicalReferenceManual/page/n129/mode/2up
012 - subst command
youtube.com/watch?v=1oOSBfiRPWo
How to use drive A: when you don't have a floppy drive
blazingfibre.net/tech/subst.htm
"SUBST A: C:\MYTEMP"
Tricking out the Amiga 2500 Part 6 - Bridgeboard
youtube.com/watch?v=40CazTansYk
Vintage Computer Forum - VCWiki - Hardware - 8bit Friendly ISA VGA cards
http://www.vcfed.org/forum/archive/index.php/t-26432.html
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 intro
1:24 the first DOS application I wrote
2:46 the first DOS machine I owned: the XT Bridgeboard
3:52 Commodore Education Purchase Plan
5:42 my DOScember project idea
6:30 Commodore sales brochures, etc.
Next part here!
#DOScember x86 asm & Amiga Bridgeboard - part 1 (my intro to DOS)
youtube.com/watch?v=NGk31dRc05E
Related:
My #DOScember project playlist:
youtube.com/playlist?list=PL2O6RH1Isy65p-cPxMx9HGlq9O_j9iVdx
#DOScember Kickoff Round Table
youtube.com/watch?v=CkwZR0OKwUw
Fusion Forty Amiga in 2020!
youtube.com/watch?v=7xhsxuF_ML8
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
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 intro
1:37 comparing the Electroware 2-in-1 PSU to the Keelog Dual PSU
2:55 Electroware PSU characteristics
4:11 opening-up the Mean Well IRM-30-5ST switching power supply
8:05 Electroware PSU teardown begins
8:48 desoldering the IRM-20-5 and status LEDs
10:13 removing the C64 power cable's pin header and soldering it, instead
12:17 what we've done 'til this point (a good place to jump back in)
13:10 fitting the IRM-30-5 into the Electroware case
18:42 testing with IRM-30-5 in place of the IRM-20-5
21:25 testing component temperatures (for 1.5 hours) with the C64 and 1541 load
23:14 rearranging the status LEDs
24:40 isolating the IRM-30-5 from the Electroware PCB
25:51 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 screws
30:32 it's done!
31:10 conclusion, hits & misses
Related:
Commodore 1541-DC: a 1541 mod for DC power, like the 1541-II
youtube.com/watch?v=0t6zxi5-aD0
Keelog 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=GjS5O6yq7rQ
Early Commodore 64 issue with Keelog power supply high AC output voltage
youtube.com/watch?v=Ld-oRmPJe7w
IRM-30 Series Datasheet by MEAN WELL USA Inc. (digikey.com)
digikey.com/htmldatasheets/production/2501754/0/0/1/irm-30-series-datasheet.html
More Electroware Power (breadbox64.com)
breadbox64.com/blog/more-electroware-power
Sven Petersen's global (115V/230V) power supply design (github.com)
github.com/svenpetersen1965/C64-PSU-Global
Sven Petersen's 230VAC power supply design (github.com)
github.com/svenpetersen1965/C64-replacement-PSU-230VAC-
This is at 20x speed. It took 37 minutes in realtime.
0:00 removing the OtterBox case and the SIM card and tray
0:02 using a rework station (heat gun) to heat the back cover (to warm and loosen the adhesive)
0:10 prying up the back cover
0:17 removing the (11) screws
0:29 removing the speaker and upper antenna assemblies
0:30 prying up the (4) flex cable connectors
0:36 removing the motherboard
0:39 opening the new USB board package
0:42 removing the old USB board
0:44 installing the new USB board
0:50 removing the old battery
1:04 installing the new battery
1:07 reinstalling the motherboard
1:10 reconnecting the (4) flex cable connectors
1:17 temporarily reinstalling the back cover (to see if things are working)
1:22 power off and removing back cover again
1:23 reinstalling the upper antenna and speaker assemblies
1:27 reinstalling the (11) screws
1:40 reinstalling the back cover
1:43 reheating the back cover (to rewarm the adhesive)
1:46 pressing the back cover down to the adhesive
1:48 power on
1:50 plug in USB charger
I 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 Guide
youtu.be/uDmffgGyFZM
LG G6 USB Board / Charging Port Repair Guide
youtube.com/watch?v=Y0oC4nPMXzM
Stay for the explanation. :)
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 intro
0:43 problem and motivation
5:04 Keelog dual PSU teardown and analysis
9:51 swapping the Mean Well IRM-20-5 for an IRM-30-5
11:08 measuring power draw using 1541 CHECK DISK utility
15:24 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-II
youtube.com/watch?v=0t6zxi5-aD0
TheRetroChannel's Commodore 64 Keelog replacement power supply review:
youtube.com/watch?v=eJ9nWh_k_J8
0:00 intro
0:09 under the hood
0:38 a bit about the '89 GTA
1:37 ignition
2:06 exhaust
2:28 about acquiring it
2:44 I go fast in a straight line (0-90 mph)
3:12 a bit more about features and showing the car
I 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.