Recent content by JDW

@JdM74 , I will read and respond to PMs tomorrow because it's but a long and tiring day. But before I go to bed, I just want to say... SE Schematics (Apple and Bomarc) are downloadable here: https://macintoshgarden.org/apps/macintosh-se-schematics-repair The section showing J16 (RAM size...

You are talking about J16, which looks like this on my matte black board: I never had a problem with it because I didn't use a jumper on it, and that's because I use 4MB of RAM, which doesn't require any jumper. I never tested lower RAM configurations because those configs didn't make any...

If by "chunky" you means something like this... ...well, those will work too! They are normal silicon diodes like a 1N4004, but they are chunky boys because they handle 6 Amps! For long term use, their size may be a bother, but such diodes will work for testing purposes just fine, if you...

And don't forget the precursor game to Marathon: Pathways into Darkness https://simplici7y.com/items/aleph-one-pathways-into-darkness/

I could have sworn I posted info about "Apple" logic board revisions and the associated ROM / IWM / SWIM chips somewhere in this forum, but none of my searches today found it. So I decided to post that info below in order to share it with @JdM74 and others. Apple Macintosh SE LOGIC BOARD...

Not sure what a "PSU grade" diode is, so if you know the part number (often printed on the diode body), that would help identify what you have. I believe that any diode other than a Zener and other than a 1N4148 (which don't come in 1A varieties) should suffice for a basic test. Silicon diodes...

I confirmed that the "always powered" solution proposed by @Androda works. No more freezes upon wake from sleep if WIFI was active when the machine went to Sleep, but I am not using it at the moment because it requires a male jumper pin to be inserted into one of the holes in the PDS connector...

One last thing. When you are finished using your HyperDrive Mac, it's highly likely you will move the machine. Before moving it, PARK THE HEADS. Sounds odd in 2024, but remember this hard drive is from the mid-1980's when heads were left having precariously over the disk platters UNLESS you...

After spending a whopping 8 hours in total on this mess, I finally found a solution. I finally found a FloppyEMU I use with my Apple IIc, flashed Mac firmware to it, then added many blank MFS 400K disk images for the purpose of making a backup. Using the HyperDrive Backup app, everything went...

Folks, if any of you happen to be owners of a GCC HyperDrive, I would appreciate hearing your thoughts. Mine is a 10MB drive mechanism installed in a Macintosh 512K with 64K Rev.B ROMs, and has an internal 400K floppy drive. I made 3 videos about my setup in the past so by watching those you...

Here's a photo of the metal hooks I mentioned in my opening post. The paint started to come off after having been dipped in the RetroBright liquid all day, showing the power of the deyellowing soup! Anyway, I simply taped those to the bottom of my Tupperware bin with masking tape, and then...

Indeed, I have no lead acid battery at all to use, which is why I purchased the Battery Eliminator from @Androda . But as I have said in other threads, the Battery Eliminator has one important consideration. It acts as a never draining battery that has no charger (ac adapter) attached. That...

Kai, is the MacEffects board a revision older than the matte black boards you kindly sent to me a long time ago? The reason I ask is because I never had a problem with RAM configurations on my matte black boards. As mentioned in the section of my video below, my matte black boards are...

Wow! Those boards look fabulous! Did you have PCBWay or JLCPCB (whoever made them) solder all those tiny components on the bottom side of the boards so you won't need to deal with that?

I'm so sorry, Drake, I'm just too busy converting this thread into Braille right now. After that, sign language. Then, Swahili. We've gotta get the word out! ✌️ Oh yes, Klingon too is coming soon! https://www.translate.com/english-klingon