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Hi everyone, I recently recapped the power supply of my Twentieth Anniversary Macintosh (TAM), and I wanted to share the capacitor list in case it helps others working on the same project. I've attached an image showing both the capacitor locations on the PCB and a complete parts list with...

If there is 5V standby but the power supply doesn't turn on, it may be due to the LM393/2N2222 combination on the PSU, which can get damaged. These components are often part of a control circuit that enables the main output, and they can be blown in a chain reaction if the original TOP200 (or...

Haha, Congrats!

I recently built a small macOS app that might be useful to anyone working with classic Macintosh hardware or custom ROM replacements: ROMSplitter A macOS utility that splits a single .rom file into two files: LOW and HIGH – exactly how many vintage systems (including early Macs) expect them when...

I recently built a small macOS app that might be useful to anyone working with classic Macintosh hardware or custom ROM replacements: ROMSplitter A macOS utility that splits a single .rom file into two files: LOW and HIGH – exactly how many vintage systems (including early Macs) expect them...

We love you all!

Just found this thread... Amazing progress! Very cool project

Would help if we know where you are located;)

For completeness and future reference, I reverse engineered the pinout back to the two microcontrollers on the mouseboard or the Kensington 64210. The MiniDin8 breakout cable pinout is: Pin 1 ADB Data Pin 2 ADB VCC (5V) Pin 3 USB VCC (5V) Pin 4 USB DATA- Pin 5 USB DATA+ Pin 6 GND...

After buying a Kensington 64210 and the lack of an adapter cable I can indeed confirm in having two microcontrollers in the mouse. The breakout cable is just passive. For completeness and future reference, I reverse engineered the pinout back to the two microcontrollers. The Kensington 64210...

In addition to cheesestraws, also check my GitHub for a International BOM & power circuit: https://github.com/daanvdl/Macintosh-Analogboard

Just for archiving purposes, hereby the original datasheets for both Apple RTC IC's: - 343S0042-A (PLCC20) - 343-0042-B (DIP8)

Beside beeping the h*ll out of it between the port(s) and SWIM, it is worth trying to scope out U13C (74AC244) which do buffer these lines: - Head Select (HDSEL) - SWIM Read (SWREAD) - Write Request (W/REQ)

Yes, i also created a VGA variant which is also available in the linked GIT repository.

4N35 is fine.

NE1 and NE2 are NE-2H Neon bulbs. I believe 95VAC/135VDC rated.

Thx. A welcome patch!

@Bolle I noticed a new revision (R5) was being uploaded to your GIT repo. Do you have any changelog available?