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Thanks! I've been on a bit of a kick about seeing original Performa stuff, and I'm very curious!

If you have an earlier disk, I'd love to see the contents of it if you'd be willing to share!

Ah yes, are you thinking of the Utilities disk? I still have this one, which came with a caddy-loading Performa 550. It doesn't have special names for those two programs, but it's definitely a Performa-specific thing. Here's a screenshot of booting from it:

I also bought a copy of the Dinosaur Safari CD that Apple mentioned in the second technote I linked, and used MAME to reproduce the bug they were talking about. As soon as you launch it, the machine reboots and up pops this message. I'm interested in looking deeper to understand how/why that...

Yeah, I was going to point out the CayMac SIMM. I think I've heard of someone else making something compatible as well, but I can't remember. To be fair, I think people have found that older SIMM designs happen to work in the 610/650 despite not disabling the onboard ROMs like the newer design...

A kind soul on Reddit let me borrow a hard drive out of a Performa 550. After I got it working (which will probably be a video all on its own for future reference for people with old Conner hard drives that don't work) and dumped it, look what I found:

Thanks! That’s a fantastic reference!

I guess I should point out that I posted a blog about this discovery today! Thanks! Is there some kind of reference of all of the steppings, revisions, etc.? I have a IIci...definitely could be worth testing! Thank you! I could have sworn I read somewhere that rev B still has the same ROM...

Thank you all! Very fun stuff. Interestingly, the early Classic II that I bought has EPROMs with stickers for the Apple part numbers instead of mask ROMs. Not that it would disprove your mask ROM theory, but I found it interesting nonetheless. I still think it was a mistake. It wasn't...

That is really, really cool. Congrats on finally finding an unmodified one, and incredible that it still has a working logic board! I can totally understand the thought process behind not replacing any of the components, especially since you already have another one that's recapped and...

Thanks! So that might be a good one for future Classic II troubleshooters, make sure that pin isn't shorted to ground. No joke, it's crazy how unnecessarily close to the pad that trace runs. Although in fairness, this wouldn't have happened if I had put caps that matched what the factory put...

I figured it out! The Classic II logic board lives, and successfully booted from ZuluSCSI. Didn't have to remove any chips. I thought the Egret looked pretty clean and I had already absolutely doused it with 99% IPA, dripped it through underneath, and scrubbed well with a toothbrush earlier, so...

Drats...recapping didn't fix this Classic II logic board on its own. I'm sooo close to being able to verify this bug on hardware. I cobbled together a video solution that doesn't depend on the analog board using mac-se-video-converter with a Pi Pico. I was originally going to wait for the...

Took care of the tricky ones tonight, in particular C3 and C13 because of their close proximity to other parts. Kapton tape helped with shielding, and the Hakko T18-BR02 tip worked well. I still think this is one of the trickier, if not the trickiest, fits I've ever had to deal with while...

Thanks for the encouragement, Andy! That's a really good idea to cover nearby plastic with Kapton tape.

Thank you both, that’s good to know. I didn’t realize they were so sensitive. I have a Hakko BR02 tip that’s shaped similarly to that, but not nearly as long. I’ve been using it for my other recaps. Hopefully it’ll fit okay!

Thanks! I'm well aware of the dangers of hot air and popcorning, which is why I also prefer using the soldering iron unless I can't. I haven't had any trouble with ICs popcorning when I install them with hot air -- are the tantalum caps even more prone to it than chips? The main issue is the...

I haven't had a chance to mess with the funky instruction any more, but I have a plan for verifying 100% that it's also happening on hardware. I bought a Classic II. There weren't any pics of the inside, and it was pretty ugly on the outside, but luckily it was not battery bombed. In fact, I'd...

I think that's a good way to put it! I wonder if you could use that header in conjunction with one of the actual NuBus slots to make a crazy frankenstein NuBus card that brings out the extra NuBus slots somehow (externally to another enclosure or something?). It looks like the only thing unique...

Ah, interesting! I was too blind to find it myself in the Bomarc schematics. The AI assistant in Adobe Reader was completely useless, too: So instead, I used @max1zzz's IIcx reloaded board file to trace out where they go, and sure enough, there it is in the Bomarc schematics. It's hooked up...