Let's see why the Apple II Europlus broke again!

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The Apple II Euro+ is broken again! Let's fix it and mod it!
Thanks PCBWay for sponsoring this video: pcbway.com/g/M525r4
Previous repair video: • This Apple II Europlus...
The ROM-X project: theromexchange.com/
Applefritter forum: www.applefritter.com/forum/84
Disk ][ drive alignment: www.apple2faq.com/apple2faq/r...
00:00 Intro
01:43 The new fault
03:44 Troubleshooting
10:05 The faulty component!
13:02 ROM modification
16:54 Floppy alignment
22:04 Demo
22:46 Outro

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Опубликовано:

22 июл 2024

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Комментарии : 81

@minombredepila1580 7 месяцев назад

It is an excellent explanation of how a bus multiplexor works. Nothing like seeing a specialist making complex things easy to understand !!!

@tony359 7 месяцев назад

Hey thank you! Sometimes I can make things easy too! :) Thanks for watching!

@als1035 Месяц назад

You show a very good understanding of how the Apple }{ works. Very nice diagnosis. The best part for me was discovering that the TL866 programmer was capable of testing TTL and CMOS logic ICs. Thank you for showing that.

@tony359 Месяц назад

It's a very capable programmer, I discovered that a long time after I bought it! You're welcome and thanks!

@YuenanCao 2 месяца назад

I didn’t expect to see a spray bottle of “No More Spiders” on someone’s work bench LOL

@tony359 2 месяца назад

Assuming that spiders qualify as "bugs", that's perfect to get rid of hardware bugs :) (mine's a terrible joke!)

@bitsundbolts 7 месяцев назад

Very nice repair! The floppy drive adjustment looked like a fluke :) But great that it worked!

@tony359 7 месяцев назад

Thank you!

@thealphageek1975 6 месяцев назад

Great job Tony! Very entertaining. Glad to see the capture device working better.

@tony359 6 месяцев назад

Thanks! It's a new one which seems to like(ish!) those odd video signals! A video about it is coming at some point! Thanks for watching!

@Hellhound604 7 месяцев назад

Good to see somebody on youtube actually use an oscilloscope to find faults. 👍👍👍👍

@tony359 7 месяцев назад

otherwise where's the fun :) Thanks for watching!

@sokoloft3 7 месяцев назад

Great fix. Interesting how clocking the floppy motor fixed the drive.

@tony359 7 месяцев назад

Indeed! And so cool that it can be done without special tools! Thanks for watching!

@aleksandardjurovic9203 7 месяцев назад

A very entertaining video. Thank you! ❤

@tony359 7 месяцев назад

Thank you for watching!

@Thorsten369 7 месяцев назад

Never be an Apple fan but i like when you repair those old computers. Still hope you get your hands on a Commodore ViC 20 for a repair. Great video my friend. Keep up the good work.

@tony359 7 месяцев назад

That would be awsome! I'm sure I'll soon have another Commodore!

@snakezdewiggle6084 7 месяцев назад

Hi Tony. Nice job 👍 I once heard a man say, "In the world there only 10 types of people. Those who understand Binary, and those that don't". 😉

@tony359 7 месяцев назад

very nerdy joke suitable for this channel indeed! :D

@khachaturian100 7 месяцев назад

Thanks Tony

@tony359 7 месяцев назад

Thank you for watching!

@THEtechknight 7 месяцев назад

Awesome! I honestly didn't know about the disk drive testing and alignment procedures. Might be worth a thought to do a video dedicated to just that alone, since I am not sure what software or disks id need to do something like that for the AII.

@tony359 7 месяцев назад

Thank you! I wanted to and then always managed to piggyback the section to an existing video. I’ll think about it!

@general23cmp 7 месяцев назад

Great video!

@tony359 7 месяцев назад

Thank you for watching!

@CATech1138 7 месяцев назад

i am very interested in the rom replacement....i have an Apple II+...it has smoked one of the roms...inhave another set of roms that imwould prefer not to place at risk.....so upgrading to less propreitary hardware sounds like a very good idea to me.

@tony359 7 месяцев назад

"smoked" as in it got physically burnt?

@andream1977 7 месяцев назад

Always fascinating ;-)

@tony359 7 месяцев назад

Thank you!

@SianaGearz 6 месяцев назад

Makes me wonder whether there are any more borderline faulty logic ICs from the same batch on there. Probably not?

@tony359 6 месяцев назад

Very possible. Though the Apple II has been working fine for a few weeks now.

@Ironclad17 7 месяцев назад

13:10 Great indie rock band name.

@tony359 7 месяцев назад

I've listened a few times but I'm not sure I understand! :D

@HwAoRrDk 7 месяцев назад

Given that the green lacquer on the screws seems to have been undisturbed, perhaps that drive was never perfectly aligned straight from the factory. 🙃

@tony359 7 месяцев назад

interesting! Who knows, that Apple was from a pile of Apples :) Yes, I could have used another floppy but... :D

@harvaldi 7 месяцев назад

Hi Tony. Do You plan videos about repairing other types of computers? Maybe Atari?

@tony359 7 месяцев назад

Of course, anything that lands on my workbench! :)

@thomasjosephlamarque2927 7 месяцев назад

interested to know why you havent decided to go down the patreon or join route? sorry if its a personal question.

@tony359 7 месяцев назад

Thanks for asking. I just feel it’s a bit too early. At some point… 🙂

@thomasjosephlamarque2927 7 месяцев назад

@@tony359 let me know when you do. :)

@SobieRobie 7 месяцев назад

I would leave the controller in the slot 7. Just in case 😂

@tony359 7 месяцев назад

ahahahah - I'd do that but some SW just doesn't work there! Weird thing that some (most) of it searches for the floppy in slot 6 in the code!

@SobieRobie 7 месяцев назад

@@tony359 Really? Apples never were my thing.

@bobweiram6321 7 месяцев назад

You saved it from becoming EuroTrash.😂

@tony359 7 месяцев назад

No computers go to landfill on this channel! :)

@watchmakerful 7 месяцев назад

Won't this hot swap of ROMS screw up the whole system?

@tony359 7 месяцев назад

it's a good question, I didn't investigate too much. However, there is ONE bit (maybe byte) difference between the two ROMs and it's the RESET routine. Now, it might be that if I swap the ROM while the system is doing some intense work, it might not like it. I do not know to be fair.

@tiemanowo 7 месяцев назад

"swapping" roms is done only by setting one input to LOW or HIGH. Data-lines are always connected to the BUS so I don't see what can go wrong except maybe occasionally system freeze / halt. This is not like unplugging and plugging back USB drive.

@watchmakerful 7 месяцев назад

@@tiemanowo What can happen if the ROM is swapped while reading?

@tiemanowo 7 месяцев назад

@@watchmakerful Maybe system crash and nothing more.

@tony359 7 месяцев назад

Oh yes thanks for clarifying. This is nothing to do with physically unplug the ROMs, it's just one address line going low/high so when the system asks for a location, a different one actually responds. So worst that can happen is a crash :)

@Epictronics1 7 месяцев назад

Cursed Apple! Nice to see it running again. ...for a few days? lol

@tony359 7 месяцев назад

So far so good! :) 🤞

@Epictronics1 7 месяцев назад

@@tony359 If it brakes again, we'll get another entertaining video :)

@cosmefulanito5933 7 месяцев назад

As we have told you many times, in devices this old you have to change all the electrolytic capacitors before you even start testing. It's not even worth testing them. Those who did not fail will fail in the short term.

@tony359 7 месяцев назад

But in this case it didn't fail because of the capacitors! And there are so few caps in an Apple II anyways. Anyways, I know it's a good idea, I just don't have the time and resources to do that every single time!

@snakezdewiggle6084 7 месяцев назад

@cosmefulanito5933 Why, what happens to the capacitors ?

@RudysRetroIntel 7 месяцев назад

I don't recommend replacing all capacitors less they are failing. This technique isn't best practice. After repairing literally 100s of Apple II, IIe, and IIc, I have never found a computer that needs all capacitors replaced.

@tony359 7 месяцев назад

it's indeed a debated subject. My view is: new ones won't hurt but they're not strictly necessary and won't necessarily fail very soon. Definitely I don't like swapping caps for the sake of doing it.

@cosmefulanito5933 7 месяцев назад

@@tony359 Actually yes. They are strictly necessary because as I explained before, those who did not fail will fail in the short term. Capacitors have a lifespan. And all those capacitors already exceeded it. A good technician always repairs the problem and prevents future problems. Otherwise you will always be repairing the same things over and over again.