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Gary Kacmarcik - Revision 5

Would it be possible for you to add a BOM/PnP file usable for a board house like JLCPCB? :)

Are the 68HC24's a pain to get hold of? I know UTSource supplies them in bulk, but not sure if they're going to be available for long elsewhere - looks like they were EOL'ed in '99?

Love it - i'll take two! 😂

I need at least one of these - excellent work, looks almost factory!

Pics here pls :p

Pics here pls :p

Ah, but it DOES have VRAM - just not a VRAM simm ;) The 41264 chips at UC6 and UC7 are probably worth looking at.

@max1zzz has even managed to make this work in a PLCC package, too :D

Wait - someone tried to install Windows?! 😂

Seriously impressive work there - also, just a little bit jealous that you get to find this sort of e-waste at all!

@Mac84 can you repost this as a resource? It's excellent!

Hey Ron - i've moved this to the 3D Printing section, but left a permanent redirect in place so people in the Apple I/II/III forum can still see it :)

Hi Jess - welcome to the madhouse - luckily for you, we cover literally every system going plus, as it would appear - plumbing. Just dive right in - there's also an active discord server with dedicated channels for each subforum.

@Trash80toG4 - in case you hadn't seen, the RTC has finally been reverse engineered and implemented in an ATTiny85 (SOIC) on a carrier PCB. https://tinkerdifferent.com/threads/the-apple-rtc-has-finally-been-reverse-engineered.2260/

I wonder if you'd have more success using PAL SIMM's for this - that was quirk on the IIx's

I'll take that bombed board off you, if you still have it!

Please note - all credit goes to Phil Greenland for this: https://www.quantulum.co.uk/blog/new-timepiece-for-a-classic-mac-part-1/ https://www.quantulum.co.uk/blog/new-timepiece-for-a-classic-mac-part-2/ So for anyone with a classic mac needing the 8-pin DIP package RTC, this is the answer! I...

The ADB has, however, been successfully reverse engineered - I do have some original PLCC ADB chips which can be used with the adapter PCB, but it might be better to get a PIC16F87 programmed with the reverse engineered code and soldered to the adapter instead.