This Apple II Europlus refuses to boot

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The Museum Tales Ep. 2 - The Broken Apple
Thanks PCBWay for sponsoring this video: pcbway.com/g/M525r4
ROM Replacement: www.blue-print.be/
BIN for the Rom Replacement: www.applefritter.com/comment/...
‪@adriansdigitalbasement‬ Apple II videos
Part 1: • Apple II+ clone repair...
Part 2: • Apple II+ clone repair...
Part 3: • Apple II+ clone repair...
Diagnostic ROM
github.com/misterblack1
Testing Apple II ROMs
www.dmcmillan.co.uk/blog/test... (contains inaccuracies)
68kmla.org/bb/index.php?threa... (more details)
Applefritter forum thread
www.applefritter.com/content/...
00:00 Intro
00:54 The situation
03:07 Testing the RAM
07:24 Testing new ROMs
09:15 Testing the Floppy
12:28 More RAM tests
14:37 Video adjustment and colour issue
19:31 testing the old ROMs
22:36 The ROM is working!
25:59 Troubleshooting the Autostart
33:06 Testing the drive
35:00 Conclusion

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Опубликовано:

3 авг 2024

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Комментарии : 68

@cocoe68 9 месяцев назад

Very interesting how small issues go to small pieces like small logical port in a TTL chip. Really not small things but you transmit simplicity and shows link between both of them, really nice how to discover effect of a really simple piece of broken electronic.

@tony359 9 месяцев назад

Indeed - and it's so sad to see so much electronics being thrown away these days because of ONE tiny broken bit inside! Thanks for watching!

@bitsundbolts 9 месяцев назад

Congratulations on this nice video! Very impressive breadboard memory tester! I wish I would understand as much as you when it comes to oscilloscopes!

@tony359 9 месяцев назад

I can totally see an "oscilloscope special" on BuB at some point! Thank you for watching!

@LynxCarpathica 9 месяцев назад

Thanks for showing an SA400's head moving mechanism from up close. Never knew it was so...simple.

@tony359 9 месяцев назад

The "Disk Drive ][" is so simple but so effective. If you compare with the 1541 from Commodore it blows your mind, that was a mini-computer in a case! The "slicing carrots" noise it makes is part of my memory of a little kid! :)

@jms6306 9 месяцев назад

Nice to see the tools being developed and used by community so quickly

@tony359 9 месяцев назад

Yes, it's amazing and also great that people are devoting their time for that! Thanks for watching!

@aleksandardjurovic9203 9 месяцев назад

Thank you very much for this entertaining video! This museum is lucky to have you.

@tony359 9 месяцев назад

Thank you for watching!

@MrProwler112 9 месяцев назад

Thank you for this video! Excellent job. Keep them coming please ;)

@tony359 9 месяцев назад

Thank you!

@Epictronics1 9 месяцев назад

Well done, excellent repair

@tony359 9 месяцев назад

Thank you! Short lived apparently as I'm told the same issue came back this evening, shortly after I left after setting up the machine! :D It's never easy, you know that... :)

@Epictronics1 9 месяцев назад

@@tony359 Great! Then there will be another interesting video about this Apple :)

@thealphageek1975 9 месяцев назад

Excellent as always... the 'bad' capture device was really trippy!

@tony359 9 месяцев назад

Yes! I need to buy another one, I'm a bit lost as all my composite capture cards failed! :)

@kwcdata 9 месяцев назад

Great video. Keep up good work.

@tony359 9 месяцев назад

Thank you!

@minombredepila1580 9 месяцев назад

Very nice video Tony. It caught my attention to see the way you tested the 2316 via the adapter. Cool !!!!

@tony359 9 месяцев назад

Thank you! I am surprised that those programmers don't have a built-in way to do so - even though I understand the 2316 could be configured in different ways by the manufacturer. Still, I was too curious to see which one was bad! Thanks for watching!

@minombredepila1580 9 месяцев назад

@@tony359 Try the retro chip tester if you have the opportunity. It really worth it 🙂

@tony359 9 месяцев назад

Oh yes of course, that would certainly do that. And will probably check the content for me!

@minombredepila1580 9 месяцев назад

@@tony359 Yes it will. You could even dump it. I have one and it is magnificent !!!

@jasmijndekkers 9 месяцев назад

Great job and nice content. Keep up the good work. Greetings from Steven from the Netherlands

@tony359 9 месяцев назад

Hi there, thank you for your kind words!

@elfenmagix8173 9 месяцев назад

Though the time is slim between the Apple IIs There are 2 Euro Plus. The older one requires that Pal Card, the newer one does not. See Noel's Retro Lab on this as he repairs color on a Newer Euro Plus machine and it did not have a card.

@tony359 9 месяцев назад

I remember that video, I thought it was a //e though? The //e was a proper PAL machine with colour. I have one myself! :)

@watchmakerful 9 месяцев назад

If address line 15 is constantly high, simply flash the whole contents into the second half of the chip, keeping the first one clear.

@tony359 9 месяцев назад

I thought I did that - even though the first half wasn’t clear but a mirror copy. 🤷‍♂️ I clearly must have made a mistake there!

@MrVipeg 9 месяцев назад

@@tony359 Actually, there's no difference what first half of flash contains. Mirror copy there is fine. BTW, you could buy a modern replacement for 27C256: Winbond's 27E257, which is EEPROM. It can make flashing/reflashing so much easier.

@tony359 9 месяцев назад

Then I made a mistake but that's weird, I tried like 4 times :) Thanks for that - yes it would be great to avoid using that death trap which is that UV light! When I opened to inspect I was shocked!

@SobieRobie 9 месяцев назад

Another succesfull repair! I will send you link to a video about cleaning 8'' disks. Should work for 5,25''' as well. The video will be on Polish 😂

@tony359 9 месяцев назад

Please do! I have tried with isopropyl and cotton but it doesn't work. I suspect that when mould has got in the media they're unrecoverable but who knows! Thank you!

@adriansdigitalbasement 9 месяцев назад

Hmm not sure why the diagnostic ROM didn't work right. You used the BIN file from the releases section? (You mentioned you compiled it)

@drgiller 9 месяцев назад

Tony, did I understand you say that it worked correctly on the IIe? I'm at a loss. It looks like the erase and print routines aren't working at all, but the test routine is (and those beep codes were saying no RAM errors were found). We definitely didn't try it on a Europlus but I can't find any reason that would change the behavior. Thanks for trying it out... sorry it didn't work properly for you!

@tony359 9 месяцев назад

@adriansdigitalbasement Yes, I downloaded it from your GitHub. I forgot to test it again, maybe I can give it another go tomorrow when I’m at the museum.

@tony359 9 месяцев назад

@drgiller - yes I tested it on my //e simply because I wanted to make sure I compiled it ok and it worked, I was aware it’s not tested on that machine but it worked for me. Thank you for making that diagnostic!! It’s going to be super useful in any future project! Even with no summary screen it helped a lot anyways!

@drgiller 9 месяцев назад

@@tony359 We hadn't tested it on the //e but others have and it does seem to work as is (but only tests the lower 48K). I'm just baffled that it worked on your //e (meaning your copy/ROM is good) but behaved so strangely on the europlus. I wonder if it does that on any europlus, and just don't know what would be different. Your feedback is very appreciated and I like your video!

@tony359 9 месяцев назад

I tested on my //e because I wasn't sure where the ROM had to be saved on my "Rom Replacement" so I copied it multiple time over the ROM chip (a 27C512 I think) until I filled it up :) I remember seeing the summary screen and seeing the RAM test being done. I'd be very happy to help on this, if there are any tests you'd like me to do on the Europlus please do let me know. You can also reach me via Email, the address is on my profile. And thanks for your kind words!

@general23cmp 9 месяцев назад

I enjoyed it sir!

@tony359 9 месяцев назад

Thank you!

@Bergi2000 9 месяцев назад

Wow. That was a bit of work. I guess it took many, very many hours… ❤

@tony359 9 месяцев назад

well it's never easy :) And time passes faster when you have fun! Thanks for watching!

@jerrybomcool 8 месяцев назад

How did I miss this video?!!

@tony359 8 месяцев назад

eheh you found it now! There's another on for this Europlus coming, the machine failed again :)

@jerrybomcool 8 месяцев назад

@@tony359 I saw your post you made 12 hours ago and click on. I watched the last video you did on the monitor and happy to see this one now! I have a europlus and apple monitor II so it’s good to watch these (I haven’t turned mine on since I’ve owned it)

@roadsiderebels3039 9 месяцев назад

So the floppy controller was being recognized on 4 5 6 7 as I understand your video. I wonder what would have happened had you plugged the controller card into slot 0 1 2 3 from the beginning? Would it have auto started? If it did, this fault could have gone unnoticed? Nice work!

@tony359 9 месяцев назад

ah good question. I might have not tested that combination - but some software on the Apple II expects the controller in slot 6 (it's hardcoded in the program) so I feel it would have been an issue anyways. Thanks for watching!

@gioghitube 9 месяцев назад

Ciao Tony, complimenti per il tuo canale. Mai avuto a che fare con un Apricot ?

@tony359 9 месяцев назад

"it rings a bell" ma non mi ricordo in che contesto mi fu menzionato. Comunque no! :) Acorn, Apricot, Apple... Non brillavano certo di fantasia! Grazie e ciao!

@gioghitube 9 месяцев назад

Se non ricordo male era un progetto inglese. Ne possiedo un esemplare con schermo lcd, trackball con fibra ottica , drive 720 e uscita monitor a colori. Un bel progetto ma ha vinto Apple. Ciao @@tony359

@darylcheshire1618 9 месяцев назад

I think my former //e was a Europlus, under the keyboard was a switch which changed the # to the pound symbol.

@tony359 9 месяцев назад

That was normal for the //e - mine has it too. It switches the fonts from the US to the local ones.

@darylcheshire1618 9 месяцев назад

@@tony359 I bought another ROM which enabled the switch to do something wonderful, I forget what, the pins didn’t line up so I tried to bend them closer and they all bent too far, I knew they would break off if I tried to straighten them so I threw it out. I should have bought a chip puller end inserter.

@tony359 9 месяцев назад

Oh no! A chip puller is good but with some patient you can use a normal screwdriver. Now I am curious to know what the ROM was for!

@darylcheshire1618 9 месяцев назад

@@tony359 trying to remember, it was cheap enough and desirable for me to get. The switch was to change some mode on the ROM.

@felangga 5 месяцев назад

Very nice video, do you have tutorial on how to burn the image to ROM chips?

@tony359 5 месяцев назад

Thank you! I don't I'm afraid but I posted the final ROM on AppleFritter (post 61) so it should just be a matter of selecting the IC in your programmer software and burn it!

@felangga 5 месяцев назад

@@tony359Thank you very much, I'll try to burn the BIN. Btw what programmer do you use? TL866?

@tony359 5 месяцев назад

The TL866 has been superseded by the T48. It's inexpensive, I'd go with the T48 if you don't have one. The TL866 is also still very capable but make sure you don't pay it the full price! :) I've recently upgraded to a T48.

@felangga 5 месяцев назад

@@tony359 ah I see, T48 indeed cheaper than the TL866II+ in my local marketplace. I'll go with that one. Btw which software do you use to do the flashing?

@tony359 5 месяцев назад

it's called XGPro, it comes with the machine (you can download it online). Mind you, I hear there are many copycats online. Which also seem to be working fine. However, the T48 can be purchased directly from the manufacturer at a reasonable price. Good luck! :)