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Here's some bonus info that didn't make its way into my video: https://archive.org/details/MacWorld_9005_May_1990/page/304/mode/2up That article contains great photos of the Mac Portable being manufactured by Apple. The Portable seems to have been made in California at the Apple Fremont...

@YMK Oh, I did not know that. Very interesting. It makes you really think more deeply about gold contacts. But of course, many commercial connectors have long mated gold-plated pins to tin-plated sockets, and those devices have worked as expected for decades. I suspect there are many...

Yes because if you look closely at all the photos, you will see one is of that RAM installed into an SE/30 motherboard. I have purchased RAM from him before and it works great. Not sure why, but he seems one of the only RAM sellers who chooses to use gold plating, which I really like. The...

It’s a complex question to answer because this thread is 11 pages long. But I have done the work for everyone by summarizing this thread page by page. THREAD SUMMARY TO DATE Page 1: @Sideburn started this thread with a question about how to eliminate a wake from sleep DELAY with his BlueSCSI...

I shudder to think my video may in fact help those EBAY sharks extract more blood from our community. It will raise awareness and also demand. All I can say to prospective buyers is, "I'm truly sorry." Having more people in this hobby enhances the fun for everyone, but cost is a huge barrier...

@Mk.558 The one I have now (which is the only one I have) proved to be the single most expensive Mac I have in all of my collection. Most of my compact Macs were acquired back in the day when USPS still offered ocean shipping to Japan. I actually eyed a 5126 EBAY auction for the last couple...

Nearly everything you wanted to know about the very first mobile Mac from Apple, and more. This video shows the history of the Portable, detailed assembly process, along with discussion of repairs and upgrades. A link to my accompanying spreadsheet filled with specs and info is found in the...

Here's my Mac Portable SPREADSHEET. While a little odd for a TD "Resource" in that it's not hosted here, I nevertheless spent as much time on it as any good "Article" resource, hence my desire to post it as such. The spreadsheet describes some little know facts about the two models of the Mac...

Silly me. I didn't realize what that rectangular hole was for until I put on the rear drive-and-battery-bay cover! The little protruding piece shown below is what must fit into the hole. So I wasn't able to put the cover back on until I shaved off some width with an X-acto knife. After that...

This... ...led me to this... https://macintoshgarden.org/apps/media100-262-digital-video-edit-system

I've never taken my little UFO guy apart to find out, but using my thermal camera I see it's one of the hottest parts of the board (61.1°C, after machine was on for 1 hour), which tells me it must be a heatsink of some sort. Here's a card feature side-by-side chart:

Radius Thunder 24/GT NuBus video card (I have one, see photo below) along with the DSP daughtercard for Photoshop acceleration. When combined together, the two cards are called the Radius Thunder IV GX 1152. Higher end cards in the Thunder IV GX series simply have more VRAM and support higher...

I found this chart some months ago and added corrections and extensive enhancements while retaining the same charm as the pixelated original. Fun and informative! Please let me know if you spot any errors I missed. HOW TO DOWNLOAD: Click the blue button in the upper right of this page.

What a wonderful story. And what wonderful photos too! Such a clean machine. It's not just a recent clean-up either. Seems obvious to me that machine was well cared for through the years. When you have basically a single owner (same family) who obviously knows how to properly store...

Found another right-side cracked hinge holder on Yahoo Auctions Japan completed listings today: The crack point is exactly the same as mine, but as you can see above, the top half of the hinge holder is completely missing. My Portable is now disassembled for the filming of my video. I've...

Thank you for confirming. You can therefore flash any kind of Mac ROM SIMM now, regardless of whether the chips are removable. Now that our dialog has concluded, I wish to say a few words to avoid offended anyone. I like the SMC team members. I like the CayMac guys. I like Downtown Doug...

What programmer do you have or are thinking about buying? Basically you have two choices: ROMmate Programmer v2, which uses this software on a modern Mac or Windoze (proper spelling). T48 individual chip programmer (not a SIMM programmer), with the Crucible software. I have both programmers...

Oh, wow. You’re very kind. Thank you. And you do have some excellent photos there. It’s actually hard to find good photos like those, especially of a working machine. Most people who shoot photos that I’ve seen keep the screen off, perhaps because the machine is broken. Yes, I am aware and...

I'm going to answer my own question with this photo of the backlight diffuser behind the LCD on my M5126 Portable... That textured top makes it diffuse light from the CCFL tube on the left side, but it will also diffuse light hitting the screen when the backlight is off. Because of that, the...

Thank you so much for your input! I sometimes use ChatGPT as an errand runner because it can search multiple websites faster than I can, but I vet what it tells me. So my spreadsheet is by no means ChatGPT generated. I've spend many, many hours going through old books, newspapers and original...