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Many of you are already aware of Phil Greenland's Github project where he uses ATTiny85 to replace the RTC (Real Time Clock) on SE/30 motherboards. It's neat because it saves PRAM to onboard flash memory. If you don't care about the date/time (doesn't get saved to flash), then you can forgo...

Fantastic info! Love your partial schematic too! And to think... This is your FIRST POST here on TinkerDifferent! I'd like to offer you a very big WELCOME ABOARD!

Noise suppression of ceramic caps is sometimes done by drilling holes in the board around the cap so the PCB won't act as a speaker cone, although I consider that a bit extreme. However, many manufacturers probably do that because noise surpassed ceramics are crazy in comparison to the regular...

@David Cook Are you 100% certain its the coil and not the cheap ceramic caps? The expand and contract in some circuits, and like a loudspeaker, use the PCB to increase the audibility of their vibrations. Coils do whine though, so it very well could be the coil. Finding a solution to the...

@David Cook You're like Scotty -- a real "miracle worker." I'm floored by the excellent detailed info you provided. You, sir, are to be highly commended for that ground-breaking work! I only gave your post a single read-through so I may have missed other negatives, but the only two...

It’s actually pretty critical because I have accidentally reversed the cable I was inserting on the internal SCSI connector on my SE/30 more than once in the past. I try to be extremely careful about that now, but since it’s happened more than once before, and since I am getting older and feel...

@joopmac https://macintoshgarden.org/apps/quiet-portable-extension

Good news. I was able to contact Petar Puskarich several months ago and confirmed he had the manual and software. Things fell by the wayside, and I only recently revisited that conversation with him. He very kindly took action and uploaded the SCSI Booster Driver to Macintosh Garden as DL#9...

@Kris92 @Kai Robinson It would be greatly appreciated if one of you could please post photos or drawings of the precise location on the SE Reloaded motherboard and the exact pins that need to be either cut or jumpered, including the place where the jumper wire needs to be soldered to, taking...

@wells Have you put your STL files through the JLC3DP website to see if the size is large enough for them to do a PLA print? They have some pretty silly minimum size requirements that can be frustrating. If they refuse to print your files in PLA, they may allow it in Nylon. So I suggest...

I can't speak to the "if at all" part above, but if an arbitrary rule of one decade is to be put in place, that would mean roughly Halloween 2034 (10 years and a couple days after Zane's last post in this thread). And since I have no means to do the work myself, and due to the complexity of...

Sorry for the bother, but I just noticed your IIcx page says IIci on the Mac photo, so I fixed that for you here (same photo, just with cx instead of ci)...

Hey, @wottle. Fantastic work. Just wanted to post here to say that I found an price error on your Mac Portable page here just now... https://thearchive.inventorydifferent.com/journeys/apple-laptops Specifically, the Portable NEVER sold for $7,300. That $7300 amount has been spread...

Technically, there is a legal issue (albeit, mostly in the minds of wannabe lawyers in online forums) with even recreating Zane's ROM, which is why the people who did that work tried desperately to contain Zane about it, and I volunteered to try to reach Zane on their behalf too. I have tried...

No. I'd say it is unlikely this particular project will continue at this point, unless a brilliant member of our community tries to build on Zane Kamenski's incredible work by attempting to recreate it and partner with MacEffects or another vendor who can manufacture it for the masses...

Just to let the cat out of the bag… The reason I tagged @SuperSVGA is because he has built his own RAM cards for the Portable and solved key problems too that nobody else ever has: https://68kmla.org/bb/threads/the-most-powerful-68000-only-mac.49969/#post-563312 His tricks include getting...

Watch me recap the 165c DC-DC board in my newest video here...

@ClassicHasClass I used Gemini to glean relevant info from your URL about the Apple Display Card 8•24 GC.... 1. The Hardware Under the Hood A CPU on a GPU: The 8•24 GC isn't just a dumb frame buffer. It features its own onboard RISC processor—an AMD Am29000 running at 30MHz (with 64K of SRAM...

I’ll tag @MacEffects and @SuperSVGA in case they might know about Mac Portable RAM Cards.

I’ve long wanted to obtain one of those cards to do my own testing. Alas, they are harder to find than a vintage Xceed grayscale kit (and I have one of those, so I know). But if I recall correctly, at lower bit depths, that Apple card beats out any other vintage NuBus card, including my Radius...