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Use ATF16V8 instead

This is just a wild guess, but is it possible that your version of AppleShare Client is not fully compatible with the Keychain? Did you already try to upgrade it?

Are you really sure the flyback is bad? Coils usually have a very low resistance when measured, this means that yours doesn‘t necessarily have a short circuit. Did you already re-solder the solder joints on the analog board? Some are almost always cracked nowadays and the cracks are incredibly...

I must have skipped the first part of the sentence.. Sorry, please apologize 🙇‍♂️ I have a stock CC and a TechStep replica. At first, it didn‘t want to enter test mode, but I had just one ADB cable attached. When I tried with two ADB cables, it worked with no issues. All logic tests passed.

Is it? You mean stock CCII? 😉 The stock CC is more like a Classic II or LC II

How many teeth has he got? 🧐

This is really cool! What is AI generated and what edited with Photoshop? I‘d love to see the other characters as well!

The Sony SND chips are the two DIP ICs at UB10 and UB11. They are mainly interesting because they trigger the initial reset of the system when power is first applied. They have been reverse engineered since they are not very complicated. The ASC is that PLCC chip labelled 344S0063-A

How are you intending to do File Sharing? Using AppleTalk or TCP/IP? I‘d strongly discourage you from using TCP/IP when using LocalTalk as you do with your LC 475 and SE/30. Did you also connect the printer port of your 6500? It might be reasonable to try this to have at least a running setup...

How do you bridge Ethernet and WiFi? Some bridging software doesn‘t correctly handle AARP packets, preventing AppleTalk communication. If you use NAT, it won‘t work anyway… Keep in mind that IP addresses are totally meaningless for any AppleTalk communication since it is not part of the TCP/IP...

I‘d analyze that RGL file and check if the raw binary (or something equivalent) is hidden inside. Can you upload the corrupted firmware?

Same with Mouser btw.. 🙃

Do they have original ROMs? 😉

Transplanting the components to a newly fabricated circuit board is your only option (if you are good at soldering). Otherwise, you can ask someone to do this for you or sell the Mac as-is.

There is no problem with the availability of PLCC sockets in general. You just need one which sticks on the non-socketed, soldered PLCC chip from above. This is a very rare use case! You could buy a few different sockets and try them. Maybe some will work.

Looks like Mouser will stock the Z85C30 again in 2026..?!

Excellent!

Very impressive! Is the emulation running on different host CPUs or everything on the same one?

That‘s the way to do it! 😃

Can you quote any source? TI still lists the 75175 as active…