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I sent @Bolle a private message on Discord yesterday, linking this thread for him to review.

While reviewing the datasheet of a coupled-inductor for one of my switch-mode power supply designs today, I noted the following warning... Of course, I have known about these warnings on other ferrite core components, but it only dawned on me today that many people in the vintage Mac...

Folks, one of the big improvements @eric made to the Apple Silicon versions of Mini vMac is they now work with unformatted disk images created either by the "dd" command in the OS X Terminal app, or blanks made by Doug Brown's SIMM Programmer app. Being able to use BlueSCSI images in Mini vMac...

For people such as myself who considers the Terminal akin to using DOS, I am one to view it as so inconvenient that I am not inclined to use it at all. But such is probably true of most Mac users. Not sure which MacOS version killed HFS, but my late 2015 5K iMac running MacOS Mojave cannot...

I can use my FloppyEMU's HD20 DSK images just fine in Mini vMac (mounting, booting, etc.), regardless of size, so I don't know what trouble you are having with those. It's just one of the Mini vMac BLANKS that I mounted in Mini vMac and later added System 6 and my own favorite files. The best...

I'm not a "computer" programmer and I don't know the C language, but I did read ALL the Mini vMac content at the link you provided, @eric. "InvisibleUp" goes into detail about the problems he had on Windoze (the proper spelling, BTW), so I chuckled through that part because I don't do Windoze...

Thank you for the CC, altering me to this thread! My own emails to Paul Pratt have never been answered. In light of all the hard work he put into Mini vMac and Gryphel, it is my best guess that Paul must have passed away. And sadly, it would appear that none of his relatives are aware of his...

In that case, simply be sure not to add too much solder. It's hard to quantify how much is too much though, because if you don't add enough, adding solder doesn't work. Adding too much will create tiny blobs on each pad of the ROM SIMM. The pins on the motherboard socket will slowly embed...

@PotatoFi I apologize for the delay. I just added a pinned comment under my video to announce you fabulous improved design, with a link to this thread. THANK YOU!

@Bolle In light of all that Colin went through, can the "non-commercial" terms you established be modified to make group buys much easier? If not, could you, perhaps, start selling mostly populated boards? What we do at my workplace (we make mostly electronic security systems, mind you, and...

Obtaining ROM clips is a problem especially because companies in China like JLCPCB refuse to print things that small! I know because I tried and failed to order them. That’s why I think it would be great if every ROM SIMM vendor could obtain the proper permissions to distribute the Clips, a...

Thanks to @Ron's Computer Videos , I was able to see you at the show, Eric! Nice! Love that little Maccy too!

Everything you wanted to know about custom ROM SIMMs, and so much more! This video took me 7 weeks to make. Much of that time was spent in testing, and in working with Doug Brown and the CayMac team. The end result is amazing. Don't miss the text description on YouTube because I packed it...

Very interesting. I've obviously not tried that app. :-) This raises the importance of have a comprehensive list of vintage software that works fine in 24-bit mode but which crashes in 32-bit. Would be interesting to see how many apps beyond Shufflepuck are affected.

You really only need to run in 24-bit mode when using System 6. But for System 7, I always use 32-bit mode and never have issues. Interesting that the RAM config you mentioned works. I can tell you that putting the reverse in also works (4pcs of 16MB in Bank A, then 4pcs of 1MB or larger in...

I believe you are talking about the solution to bad ROM SIMM connections, not RAM Banking. The RAM Banking problem exists UNLESS you use a non-stock ROM, and then it magically vanishes. Bad ROM SIMM connectivity is caused by most non-stock ROMs being only a nominal 1.20mm thickness, which can...

Unfortunately, the first time I switched on power after building my board, it worked like a charm. The likelihood of that happening is very low, so I can only say I must’ve been richly blessed. The reason I say it’s unfortunate is because a lot of learning happens whenever there’s a problem...

@theassailant You did not install C67, correct? Mistakenly installing a capacitor there will cause some pretty crazy issues.

Hmmm... Seems like you've got both a Sad Mac and garbled video. @Kai Robinson , would this be caused by two separate problems on the motherboard? Also, did you see anything like this when you tested your own SE Reloaded boards?

I've only watched the first 5 minutes, but it looks like a great film. Thanks for sharing it, Eric. I still have my Newton 2100 (in a Newton 2000 case), which still works. I modded it many years ago so I wouldn't need a dongle to connect things like the keyboard (which I also have). I...