Fixes for the Apple ][ plus Language Card and Keyboard

Рет қаралды 72,716

3 жыл бұрын

Welcome to part 4 of the Apple II+ repair series! In this video, I fix the faulty keyboard and figure out what is wrong with the language card. Warning: Includes liberal use of CALL -151! Let's get right to it!
Part 1: kzfaq.info/get/bejne/p7qbi5qj0NfDe58.html
Part 2: kzfaq.info/get/bejne/Z89zf8eTq5fXl6s.html
Part 3: kzfaq.info/get/bejne/ptGoppBinZate4k.html
Part 4: This video!
Part 5: kzfaq.info/get/bejne/b55koL2W3ZjUe40.html
Part 6: kzfaq.info/get/bejne/q9Gmh5pimJfUgok.html
0:00 Intro
1:04 Solving the keyboard issues
8:17 Further testing of the machine and identifying another fault
17:34 Troubleshooting the language card
21:33 Using machine language monitor to figure out what's wrong with the language card
34:35 More keyboard issues
37:38 Final(?) reassembly
To copy Apple II roms into the language card:
800: A0 D0 84 FF A0 00 84 FE B1 FE 91 FE 88 D0 F9 E6 FF D0 F5 60 00
800G
To copy language card back into main memory ($2000):
840: AE 80 C0 A0 D0 84 FF A0 20 84 FD A0 00 84 FE 84 FC B1 FE 91 FC 88 D0 F9 E6 FD E6 FF D0 F3 AE 82 C0 60 00
840G
--- Video Links
Calculator used on my phone:
Programmer's calculator - BitCalculator
play.google.com/store/apps/details?id=com.kebstudios.calc&hl=en_US&gl=US
IZ8DWF's channel:
kzfaq.info/love/gwkF_tMMsury1DeszD4Ohg
IZ8DWF's video on his replica language card:
kzfaq.info/get/bejne/Z7GAfKSgtJfIhIk.html
Apple II Memory Map:
apple2.guidero.us/doku.php/mg_notes/general/mem_map
A trip down Memory Lan by Matt Jenkins: (slides borrowed from this)
www.slideshare.net/mattjenkins355/a-trip-down-memory-lane
High-res pictures of my 70's trash towel:
imgur.com/gallery/eoaMNJv
--- Tools
Deoxit D5:
amzn.to/2VvOKy1
store.caig.com/s.nl/it.A/id.1602/.f
Jonard Tools EX-2 Chip Extractor:
amzn.to/2VazxDS
www.jonard.com/Products/EX-2-DIP-IC-Extractor-24-40-Pins
Wiha Chip Lifter:
amzn.to/3a9ftWw
www.wihatools.com/precision-chip-lifter
O-Ring Pick Set: (I use these to lift chips off boards)
amzn.to/3a9x54J
Elenco Electronics LP-560 Logic Probe:
amzn.to/2VrT5lW
Hakko FR301 Desoldering Iron:
amzn.to/2ye6xC0
Rigol DS1054Z Four Channel Oscilloscope:
www.rigolna.com/products/digital-oscilloscopes/1000z/
Head Worn Magnifying Goggles / Dual Lens Flip-In Head Magnifier:
amzn.to/3adRbuy
TL866II Plus Chip Tester and EPROM programmer: (The MiniPro)
amzn.to/2wG4tlP
www.aliexpress.com/item/33000308958.html
TS100 Soldering Iron:
amzn.to/2K36dJ5
www.ebay.com/itm/TS100-65W-MINI-Digital-OLED-Programmable-Soldering-Iron-Anti-static-Structure/113382669853
EEVBlog 121GW Multimeter:
www.eevblog.com/product/121gw/
DSLogic Basic Logic Analyzer:
amzn.to/2RDSDQw
www.ebay.com/itm/USB-Logic-DSLogic-Basic-Analyzer-16Ch-100MHz-4Ch-400MHz-Xilinx-Spartan-6-FPGA/202543965672
Magnetic Screw Holder:
amzn.to/3b8LOhG
www.harborfreight.com/4-inch-magnetic-parts-tray-90566.html
Universal ZIP sockets: (clones, used on my ZIF-64 test machine)
www.ebay.com/itm/14-16-18-20-24-28-32-40-pin-IC-Test-Universal-ZIF-Socket-Fs/303206721971
RetroTink 2X Upconverter: (to hook up something like a C64 to HDMI)
www.retrotink.com/
Plato (Clone) Side Cutters: (order five)
www.ebay.com/itm/1-2-5-10PCS-Micro-Scissor-125mm-PLATO-170-Electronics-Cutter-Side-Cutting-Pliers/163458746184
Heat Sinks:
www.aliexpress.com/item/32537183709.html
Little squeezy bottles: (available elsewhere too)
amzn.to/3b8LOOI
--- Links
My GitHub repository:
github.com/misterblack1?tab=repositories
Commodore Computer Club / Vancouver, WA - Portland, OR - PDX Commodore Users Group
www.commodorecomputerclub.com/
--- Instructional videos
My video on damage-free chip removal:
kzfaq.info/get/bejne/jreGndqB2LyqlGw.html
--- Music
Intro music and other tracks by:
Nathan Divino
@itsnathandivino
Outro Music:
Abyss by | e s c p | escp-music.bandcamp.com
Music promoted by www.free-stock-music.com
Attribution 4.0 International (CC BY 4.0)
creativecommons.org/licenses/by/4.0/

Пікірлер: 300

@Fuzy2K 3 жыл бұрын

Dude, finding that stuck bit was awesome! That's some serious troubleshooting!

@Kc12v140 3 жыл бұрын

You’re not kidding. That was some next level troubleshooting. Bravo to him

@hyperboloidofonesheet1036 3 жыл бұрын

I had a similar problem on my old Apple //e back in the day. The bit wasn't completely dead, but it was noisy, causing a lot of crashes. I narrowed the problem down using HGR mode, looking to see which pixels weren't displaying properly.

@CharGorilla 3 жыл бұрын

This technique is kinda unique to computers of that era, where a single chip is responsible for 1 bit in a word. There is no way you could do the same with modern DRAM. But then again, computers these days don't come with a schematic.

@themegaman91965 3 жыл бұрын

What a long way we've come in 41 years! All these chips carried so little, and the 40 year old Language Card from 1980 just shows how far we've come. A card that size made now can pack some serious power. Really nice to have these pieces of computing history around to show us how simple these used to be, despite their large sizes. Also found out that this uses the same processor as the NES (MOS Technology 6502 architecture), but running at 1.002 mhz, instead of the 1.79 mhz on the NES! The NES just had a different manufacturer, Ricoh, but still just about the same processor! This stuff is just so fascinating to research! :)

@CATech1138 4 ай бұрын

using an Apple 15 as a base line for a modern board size to power ration, a card that size would equal a half a dozen current for 1980 Crays....maybe more?

@NokusSonus 3 жыл бұрын

You're probably going to be sent a million key switches now.

@onesixfive 3 жыл бұрын

WOULD YOU LOOK AT THAT - FIXED! I literally did a weird like evil laugh at this part. It was like a good vs evil triumph. I get so caught up in your troubleshooting Adrian! Thank you so much for what you do!

@shickster1 3 жыл бұрын

With that many cards, I suggest active cooling. My father manufactured the "Super Fan ][" which hung on the left side of that series of cases/stands. There were plenty of clones of his design, and a lawsuit against Kensington for patent infringement. I assembled thousands of units myself as a child. We also made a unit that sat on top of the early Macs, the "Mac'N'Frost".

@yuchong1704 3 жыл бұрын

Yes i had a side fan too. It was noisy too.

@jpt3640 Жыл бұрын

Mine got a Papst fan mounted on the right. Sounds like a jet plane starting

@michaelcalvin42 2 жыл бұрын

"The power cord doesn't connect inside the Apple ][" gave me a good chuckle. Thanks for leaving your mistakes in the video.

@minombredepila1580 3 жыл бұрын

Do you guys also pause the video to see what's on the shelves, or it's just me?. Another fine video from Adrian. Keep up the good work !!!!

@performa9523 3 жыл бұрын

Machine language troubleshooting is tantamount to sorcery as far as I'm concerned. Holy cow that's impressive! *Hagrid Voice* "You're a wizard Adrian!"

@TheGuyThatEveryoneIgnores 3 жыл бұрын

0300: A0 03 A9 07 4C 3A DB D9 0308: CF D5 A7 D2 C5 A0 C1 A0 0310: D7 C9 DA C1 D2 C4 A0 C1 0318: C4 D2 C9 C1 CE A1 00 300G

@moebius2k103 3 жыл бұрын

Great video, I just missed out on this earlier golden era of computers. It gives me the same satisfaction of my early troubleshooting days with the addition of board level repairs. Narrowing down the possible problem parts and swapping them out will never go away.

@suluturnip 3 жыл бұрын

This dude is the Bob Ross of retro repairs.

@catcam 3 жыл бұрын

You are spoiling us with intro ... " i will fix this and this and this ... " we want DRAMA !!! Thanks again for great content dear Adrian , stay safe .

@erinwiebe7026 3 жыл бұрын

Thanks to your channel, my kit now has a can of deoxit! I only just picked up a joystick just like the one you have near the end of the video too which I hope to get working with my Apple IIe card for my LC III. And hearing the 'head knock' sound of those Apple floppy drives brings back so many memories of friends gathering around the Apple II's we had at school. It's amazing all the rabbit holes this hobby opens up!

@ukaszrutkowski8368 2 жыл бұрын

WOW! That CALL -151 usage was a bunch of nice low level debuging. Chapeau bas.

@ordinaryk 3 жыл бұрын

Some of my earliest computer experience was playing Oregon Trail (the original text version!) on an Apple IIe in 4th grade (1982-83), so this really brought back memories. Thanks for the upload!

@dougjohnson4266 3 жыл бұрын

Nice work fixing it. Going to suck when there are no more spare parts for old computers.

@knghtbrd 2 жыл бұрын

Hey Adrian, the stacked sockets trick to route the pins works in a pinch, but if you've got a veroboard or better yet in this case, some plated hole stripboard, you can solder in some headers in from the top, the socket, offset, and then the other set of headers from the top. That'll cut the size of your adapter almost in half. Also, "memory card in slot #" … isn't a language card test, it's a "slinky" card test. Expansion card (1-7) RAM for the Apple II came in a form where you could set an address on three bytes would load a counter and an access (be it read or write-careful with 6502 opcodes that access an address twice!) would auto-increment the counter. So you'd read from the same address multiple times in a loop to copy stuff to sequential addresses in main memory, or write in a loop the same way to save stuff to the card from main memory. The language card has the totally different bank switching mechanism to the slinky-replace the ROM for 8k, and the two swappable banks of 4k each, as noted. Obviously a test for slinky RAM isn't going to work on a language card, and a test for a language card (which oddly wasn't present?) won't test a slinky RAM card. What uses skinky RAM? … ALMOST NOTHING! It was possible to use it as a RAM disk. Some few people did that. No, the only app you've ever heard of that used it as RAM somehow … was AppleWorks. I've never heard of more than a 1MB slinky, but theoretically you could have 16M. And I recall some magazine ads talking about "up to 17MB" in an Apple II, but … nobody did that, it would require both slinky _and_ extended aux RAM on a IIe to even try it, nobody really had more than 4MB of aux RAM, etc. Even AppleWorks would use ONE of 65c816 RAM, IIe aux RAM > 128k, OR slinky RAM. Nothing used all of the above, if available.

@yuchong1704 3 жыл бұрын

Why does the whole video just make sense for me? Must be because i had an Apple ][ growing up. Good work Adrian !

@papafrank7094 3 жыл бұрын

I truly enjoyed this whole series. Thank you from an old school hacker. G=C800:5

@DaveMcAnulty 3 жыл бұрын

I still remember upgrading my PC and FINALLY being able to select 1:1 interleave. :D

@retroguy4139 3 жыл бұрын

I loved the Apple II+ IIes and IIe enhanced they had in high school. The teacher would hardly ever let anyone touch the II+.

@TRONMAGNUM2099 3 жыл бұрын

Adrian has to be one of the smartest men on the planet.

@nihilistsre 3 ай бұрын

The code is handy - especially with the faulty ram card. A really simple way to copy the memory within the monitor is to tickle C083. C083 toggles the WRITE on the language card, but READ still comes from ROM. You can then enter D000

@jeromekentz6616 3 жыл бұрын

I really enjoy your videos. They have inspired me to learn more about retro computing including a better understanding of machine code. For the first time I actually fully understood what you were taking about!

@AlanPope 3 жыл бұрын

I do love watching your Apple ][ related content. As a child of the 70's in the UK these just weren't really a thing here. We had the Sinclair / Commodore stuff mostly. So it's fascinating to me to learn how these things were used, debugged and expanded. Wish I'd got into them back then! :D Keep up the great work Adrian. It's awesome.

@Zeem4 3 жыл бұрын

I'm in the UK and in the early 2000s I managed to buy a 128K Apple IIe, with dual floppies and Super Serial Card, from the local recycling centre for £5. I had a load of fun with it, especially the process of sending a floppy transfer program over the serial port to create a boot disk. I sold it a few years ago and have regretted it ever since.

@OzRetrocomp 3 жыл бұрын

I'd argue that the BBC Micro was the British Apple II. Same CPU, similar build quality, similar expandability (even if the technology differed i.e. cards on the Apple vs ports/ROMs on the Beeb). I'm fortunate to live where both the Apple II and the Beeb were reasonably successful in the market. Oddly enough, Adrian's current Apple II+ series has given me some inspiration to revisit a couple of Beebs in my collection that I'd almost written off as parts donors.

@infinitecanadian 3 жыл бұрын

I like how you use the ']['.

@infinitecanadian 3 жыл бұрын

@@OzRetrocomp The BBC Micro was probably superior to the Apple ][.

@TheErador 3 жыл бұрын

@@infinitecanadian almost certainly, with a second processor on the tube bus

@countersurprise 3 жыл бұрын

Hi Adrian, Really enjoyed this video - as always. I've never owned an Apple ][, so it's all new to me. I love how you explain the steps you took and how you used the Machine Language Monitor to troubleshoot the RAM. Very educational! Also, I love that you show your mistakes - such as mounting the PSU the wrong way around! Keep it up and thanks for making this content!

@spagamoto 3 жыл бұрын

Nice sleuthing. The Adrian Method (poking at memory in a debugger) wins again! Also, I love the Internet. Where else can you get high-res scans of a rad towel?!

@michaelblair5566 3 жыл бұрын

Adrian's diagnostic ability is fantastic.

@Walczyk 3 жыл бұрын

my favorite part of youtube! I find the troubleshooting sooo fascinating. It's truly a service to society

@edmclaughlin4923 3 жыл бұрын

This was an excellent video Adrian! A little bit of everything.

@retropuffer2986 3 жыл бұрын

I really liked how later utility and productivity software would scan for memory on the Apple II. I always got a kick out of seeing the 16K language card appear in addition to the motherboard and 128K card I had.

@75slaine 3 жыл бұрын

Really enjoying this series Adrian. I especially love the machine language monitor technique of debugging RAM issues. One I’ll have to remember for future sessions. Looking forward to the next instalment 👍

@leesmithsworkshop 3 жыл бұрын

Thank you, I never used any old apple computers back in the day, not something you saw in the uk so I was very interested to learn so much about them in this series. I am also slowly learning 6502 and z80 assembly and I was so happy that I understood the assembly program you entered in this episode.

@photolabguy 3 жыл бұрын

Fart noises, then... "That was a pain in the ass". 🤣

@twocvbloke 3 жыл бұрын

I was reading an ebay message and thought the same when I heard it!!!! :P

@SimonQuigley 3 жыл бұрын

Lol, I popped into the kitchen to get a pizza out of the oven and was like "what is going on?!"

@greenbriar07 3 жыл бұрын

Nice job taking everything apart & a round of applause for taking the time to replace all those keys!

@OzRetrocomp 3 жыл бұрын

This would be my favourite series thus far. Your videos just get better and better, Adrian. I can see the methodology used to solve multiple issues being applicable to almost any other vintage computer (assuming said computer is as well documented as the Apple II+).

@Pistoletjes 3 жыл бұрын

44:14 actually, it's DE-9, not DB-9.

@timsanders9111 Жыл бұрын

I envy and admire your troubleshooting skills. Very impressive. Thanks for this series.

@MagesGuild 3 жыл бұрын

DeOxit *will* work, but you need to use it as a flush, not as drops, to force any contamination out of the contactor plates. This means that you need to spray it it under pressure. I suggest a three step process, which is what I used on sealed keys: Flush with DeOxit D5. Press keyswitch rapidly ~100 times. Flush with DeOxit F5 (Fader Lube), again press rapidly ~100 times. Finally, flush once more briefly with DeOxit D5, and slowly press switch ~50 to 100 times. Allow to dry.

@Fractal_CZ Жыл бұрын

Absolutely love that memory issue troubleshooting!

@martin-ot 3 жыл бұрын

Adrian: Fantastic; I really enjoy your repair series, and I think especially this Apple ][ series of videos has been the best so far. Love it!

@dairedarcy1130 3 жыл бұрын

Love the Schneider Cup poster in the background

@jjeffers88 3 жыл бұрын

Top tier troubleshooting and skills in this one. Awesome video!

@timwatson9198 3 жыл бұрын

I always learn so much watching your vids, love it!

@joshhardin666 3 жыл бұрын

That Amdek display is AMAZING! I used to have the same model that was bought with my hand-me-down II+ - I had it set up in my bedroom back in the day and i'd run the apple II through the video input on my VCR using it to record graphics from the II+ with the video out going to the Amdek as well as using the VCR with a set of bookshelf speakers as a cable TV tuner. it made a fantastic tv and computer setup, and man that display had WAY better clarity and sharpness than any other tv I saw at that time (the early 90's) and the color reproduction was on point! - I had lots of great times watching tv, movies, and messing with my II+ on that thing.

@fgaviator 3 жыл бұрын

So, we're upgrading to "ADLR" now: Adrian's Digital Living Room? 😉

@adriansdigitalbasement 3 жыл бұрын

I'm sometimes actually allowed upstairs!!!

@davidfrischknecht8261 3 жыл бұрын

When I was a kid, we had a Fingerprint card in our Apple //e.

@PaulinesPastimes 3 жыл бұрын

Excellent video as usual. The troubleshooting of the card really captured my brain and you made it easy to comprehend. Cheers

@visitandolosclasicos 2 жыл бұрын

Ty for these great videos !!!

@marksterling8286 3 жыл бұрын

Great diagnosis on the language card.

@captain3186 3 жыл бұрын

Every time I watch video's on Repairing and Troubleshooting older Apple II's, I appreciate the Apple IIe even more. Anyway, I am very much enjoying watching this series and your trouble shooting skills are incredible too me. I tend to get ticked off too quick and just start throwing parts at the problem until it resolves lol

@parrottm76262 3 жыл бұрын

Never had an Apple II back in the day, but I drooled over them at my local store. This makes me want one.

@lrochfort 3 жыл бұрын

Great stuff. Got to love some bit bashing

@laxr5rs 3 жыл бұрын

Awesome vid. Thanks again.

@Dukefazon 3 жыл бұрын

I bought a chip lifter thingy you use, that looks like a screwdriver turned into a crowbar and it's a really neat little tool. I think these are not product placements but when you use a tool successfully I feel the need to buy one for myself too as it makes to job easier. I also want to buy a chip lifter you use on bigger chips, like a VIC-II chip but I already spent waaay too much money on things this month.

@chemmerling 3 жыл бұрын

Love your living room artwork!

@uni-byte 3 жыл бұрын

Awesome! Thanks for rescuing this beauty!

@johnboynb 3 жыл бұрын

For the power light...Letraset dry transfer covered with nail polish or some such.

@duanerobinson935 3 жыл бұрын

Man! That machine looks good!!

@JonGallon 3 жыл бұрын

30:57 Bono Vox was the guilty one all this time. 😂

@miridorable 3 жыл бұрын

Love these apple 2 videos

@FernandoelChachi 3 жыл бұрын

Marvellous repair

@orbitalgolem91 3 жыл бұрын

Total blast down memory lane. I remember struggling with my ][ Plus in the '80s locking up every time I enabled the Language Card by reading from address $C080. Finally found docs that indicated the need to copy the ROM contents to the card's RAM. Grin from ear-to-ear when I read from $C080 after doing that and the machine didn't freeze. Scary what one remembers from almost 40 years ago.

@Natures_Intentions 3 жыл бұрын

Love the videos. Thank you for making this content.

@FarrellMcGovern 3 жыл бұрын

Ah, the old days of using Apple Cillian to diagnose problems...memories...I assume that you did try the standard "Apple Fix" on the language card...the Apple Fix is basically first pressing down the chips to make sure they were properly seated. I used to tell people I had "healing hands" for broken Apples. I would take the top off, press down on as many of the chips I could, and many times would "fix" their no-boot, or crashing problems. More advanced "repair" would be removing and re-inserting the chips, based upon knowing which error was normally would cause what problems...the next was swapping said chip(s).

@stevethepocket 3 жыл бұрын

I can't imagine how the label came off the power light, but compared to almost any keyboard made in the last couple decades, it's fortunate that the labels on the actual keys haven't worn off. That's one thing I've noticed is consistently more reliable about older computers. I wonder what they were doing back then that they don't do anymore.

@adriansdigitalbasement 3 жыл бұрын

They are double shot keys, so they can't wear off. The light color is moulded right into the plastic unlike modern keys.

@kaitlyn__L 3 жыл бұрын

As Adrian said, but there's also dye sublimation and laser etching (plus infill occasionally), which also class as permanent. Starting about 20 years ago, they simply silkscreened the letters on, or even worse, just stuck tiny stickers on. All of my school's cheap keyboards had worn-out letters, but the librarian's early-90s keyboard still looked brand new.

@mal2ksc 3 жыл бұрын

@@adriansdigitalbasement Unlike _crap_ modern keys. Anything "enthusiast grade" is a double shot or laser etched even now. (Dye sub works a treat, but it's kind of expensive so not really done at a mass level.)

@ct92404 3 жыл бұрын

I have an Apple II+ too, and I love it! I'd say it's my favorite vintage computer and for sure my favorite to write BASIC programs. I'm definitely not a fan of modern Apple crap, but their early computers were awesome.

@Dukefazon 3 жыл бұрын

37:53 - gave me a chuckle, checked it out and it's really there, this is crazy :D

@UpLateGeek 3 жыл бұрын

I've mentioned on one of the previous parts my experience with the Apple II. It's definitely on my bucket list of vintage machines to collect, but all the ones I've seen have sold for ridiculous prices. Maybe the buyers might think they got a good deal, so I hope they're getting a working machine for the premium they're paying. But I'll be patient and hopefully find one that's a reasonable price. Possibly one that needs some repairs. It looks like these machines are fun to work on, so that's something to look forward to! Keep up the great work! Can't wait for Wednesday's video! 😉

@davefarquhar8230 3 жыл бұрын

No laser printer? Why not snag one on your next trip to the electronics recycler? I grabbed an older office-grade HP Laserjet 4050 for around $50 at a recycler 10 years ago, and it's still working great for me. I had to upgrade the memory to print really long documents, but that wasn't expensive. A lot of printers get discarded just because they're old, there's nothing else wrong with them.

@TheH454 3 жыл бұрын

Also keep an eye for deals on Brother lasers (Amazon and Newegg). I got my aunt a new basic Brother laser for like $50 with shipping. Plus Newegg haves generic toner sales for CHEAP. I pay like $10 for toner and get about 3 - 4,000 pages.

@GadgetUK164 3 жыл бұрын

Excellent =D Lovely to see these Apple ][ videos - they weren't very popular over here and quite rare as pickups!

@BitSplits 3 жыл бұрын

Adrian, to clean keyboard switches , You can use an ultrasonic cleaner. I do it for all the vintage switches I want to restore. You can grab one on Amazon ; the process is simple and You can use plain tap water. After cleaning just use compressed air to dry the parts and let them fully dry for one day in a dry place. :) With older Apple II switches that can't be opened, injecting 1cc of IPA alcool in the switch helps salvaging them 80% of the times .

@wolvenar 3 жыл бұрын

Deoxit works great in the switches but when they are really bad ones I have soaked in vinegar for a while, rinsed *very* well and then again Deoxit.

@davefarquhar8230 3 жыл бұрын

I can second the ultrasonic cleaner recommendation. They're great for anything that can't be fully disassembled, or that's really difficult to disassemble.

@Evhen_Velikiy 2 жыл бұрын

Heh. Hi. I want to share with you my experience of fixing all the kinda buttons. At first I used alcohol,solvent,gasoline and sort of chems, but it didn't helped or helped for a short period. But then I've found solution that helps in 95% cases. This way I fix all kinds of buttons, switches, tumblers etc. In many cases you even don't need disassemble thing, just poor some over the thumb and stroke it for some time enough to lick it through to the contacts inside. First time i've tried it on mouse button switch - and it worked flawlessly, long term tests confirmed its reliability. The solution is - thin silicone oil, yes its that simple. Also - for some cases I used syringe, just poke a side of a button and deliver oil in.

@jackconvex9524 3 жыл бұрын

Love you Adrian

@Zorix83 3 жыл бұрын

Would be really a neat idea to find the font that was on the original power light, create a stencil and paint on the original lettering. Takes some precision and would need to fill in the bridges holding the lettering together, but it could look really nice.

@CharGorilla 3 жыл бұрын

With continued use, those keys treated with Deoxit may likely improve, simply due to the fact the machine seems to have been sitting idle for a long, long time, and that any corrosion / dust or crud build-up will likely get knocked around due to vibration, and "percussive mechanics" on the contact plate.

@turgin9098 3 жыл бұрын

Cool and dreary outside, but warm and a new ADB video inside. Its a good Saturday!

@dimwittflathead639 3 жыл бұрын

Use typewriter eraser stick to clean the switches. If you can't find (most likely), use a sharpened jeweler's screwdriver to scrape the corrosion off. Use a 6 inch mill file and 2000 grit sandpaper to make the sharpened screwdriver and use only for that purpose.

@colonelgraff9198 3 жыл бұрын

10:44 Computer possessed by Satan

3 жыл бұрын

Evil around in keyboard shape

@dinon35 3 жыл бұрын

It’s the ghost of Steve Jobs....!

@vladimirmuzik8648 3 жыл бұрын

Just spray it with holy deoxit

@webestilo 3 жыл бұрын

You are a Ninja!!!

@Hounddoggy33 3 жыл бұрын

I never had an Apple II whatsoever. A friend of mine had one and I remember playing Captain Goodnight on it. I had a C64 at the time. Greets from Canada!

@TheGuyThatEveryoneIgnores 3 жыл бұрын

22:47 No program is needed to copy the contents of the ROM into RAM. Just use the monitor command D000

@redace001 3 жыл бұрын

It would be interesting to bust out a dremmel tool and slice open one of those bad keys, so you (we) can really take a peek at what's really going on with the contacts at the bottom.

@tony359 3 жыл бұрын

I was a kid when my brother and I opened the Apple //e to tinker with it. Not sure why my brother decided to unplug the Disk ][ ribbon cable from the controller and then plug it back again... shifted by one row. We powered up the Apple to see magic smoke coming out of the drive... :(

@frankowalker4662 3 жыл бұрын

The year is 2168, Adrian has just uploaded Part 1262 of the Apple ][+ repair series - Keyboard nearly working. Sorry. (LOL)

@catriona_drummond 3 жыл бұрын

...and the race is on, will Adrian finish before Jan Beta, who is stuck in Septandy for 1776 consecutive months now, manages to get his TRS-80 into working condition?!

@frankowalker4662 3 жыл бұрын

@@catriona_drummond Ha Ha

@MoosesValley 3 жыл бұрын

If you are worried about the piggy back chips and the floppy card coming into contact, put the floppy card in slot 7. Then type PR#7 to boot. It brought back a lot of memories seeing you type in, run, list machine code. Did a lot of that back in the early 1980's. CALL-151 for a good time !

@Arcticretro 3 жыл бұрын

Ah that feeling when it works:)

@danielheskett 3 жыл бұрын

Using an iPad to fix an old Apple just feels... right somehow. Like we live in the future.

@Porygonal64 3 жыл бұрын

I remember when you were only at around 16k subs... Now look at you! Almost to 100k!

@Zorix83 3 жыл бұрын

Might be able to restore some of those intermittent keys by using an ultrasonic cleaner for a period of time. Worth trying if you ever get one.

@jackguster6531 3 жыл бұрын

I've had jail bars On my c64 and I just bought a nice rca composite with gold ends and silver and copper wire with good insulation it helps a lot and I deoxit the output and wiped it down . I'm also running a old magnvox glass flat screen from 2003? It got rid of all of the bar problems that I had

@bzert281 2 жыл бұрын

Oh, i remember getting a Radio Shack CGP-115 (i think) 4-pen mini-plotter/printer to use with my Apple ][ Plus - it had a Centronics parallel interface, and i drove it by breadboarding a shift-register and connecting the data and clock to my joystick connector pins, and writing a little machine-language routine to bit-bang print output through the joystick port, and it was MY turn to not--believe-that-it-freaking-worked! I think you actually have one of those printers from one of your mail calls, would love to see you work on that, it is a fantastic little piece of gear, cheapest printer available, think i paid about $120 US for it, new.

@drussell_ 3 жыл бұрын

I need a couple of those key switches to fix a TI-99/4A keyboard! :)

@PaCav-et3kt 5 ай бұрын

Amazing work. Maybe using an ezyout screw to remove the bad screw may have worked.

@bobblum5973 3 жыл бұрын

I'm definitely re-watching these episodes once I get some time to check out my Apple ][+. I haven't tried powering it on in several years, so want to be careful with it when I do.

@cbnewham535 Жыл бұрын

Did it work? Mine hasn't been powered on in 37 years - currently in storage (long story), so I expect by the time I get access to it it will be 40 years old. I believe that it's mainly the switching power supply capacitors that should be checked.

@bobblum5973 Жыл бұрын

@C B Newham Sadly I _still_ haven't had or made the time to set it up and check it out. I can't believe my post was two years ago! Still hoping to get to it one of these days. 🙂 🍎 🍏 +

@hnphnp1 3 жыл бұрын

You can remove the contact plate from the keyswitch body. You have to dig out the red sealant on the bottom of the switch body and then you can carefully pry the contact plate out of the switch body. Sometimes this is necessary for seriously oxidized or dirty switch contacts. You don't have to replace the sealant afterwards.

@hnphnp1 3 жыл бұрын

And don't throw those "dead" switches away - they can all be cleaned if dismantled unless the corrosion is too far gone.

@warwagon 3 жыл бұрын

Great video! You should have WAY more subscribers. Your videos are fantastic. Question, what camera do you use to record? Who would thumbs down this video? What's not to love?

@Jpetersson 3 жыл бұрын

33:28 Twin Peaks vibes!

@falken_gt4 3 жыл бұрын

Something about owls and trees I think

@joe--cool 3 жыл бұрын

Nice, now you start gaming :) Some of my favorites are: Choplifter, Ceiling Zero, Night Mission and Prince of Persia.

@barnabas5688 3 жыл бұрын

I still regret not taking one of these when my school was throwing them out in 1992. I took home a dot matrix printer instead, because I knew it would work on my Amiga. Weighed a tonne as well. What an idiot...