If you intend to print to Netatalk with System 6 or earlier, you MUST install the LaserWriter 7 driver. System 6.0.8 came with this driver out of the box. Some System 6 machines can run the LaserWriter 8 driver too, but the older driver is lighter weight and likely more suitable for a compact.
The mouse that came with my Apple IIgs is a weird one. Its an A9M0331, but it has the lightweight black ball and cover. S/N 506548 Made in Taiwan. The IIgs dates to 1988, so close to the release of the Portable. Of course I don't know if this is the mouse that originally came with the machine...
The speaker jack on a real Apple II has +5v on one pin and the other pin is the sound output from TTL logic routed thru a bunch of passives. I don't know what the IIe card's output looks like.
What does the circuit look like between the PDS slot pin and the audio output? Its likely it attenuates the 5V TTL signal down to line level before mixing it into the main audio output.
The HFS MacFUSE file system would be a good starting point to see how to natively integrate resource forks and FinderInfo into the macOS port of afpfs_ng.
https://github.com/thejoelpatrol/fusehfs
Other platforms shouldn't attempt to do this. The existing method of throwing the resource fork...
ProDOS used 7 bits to store the date, but intentionally limited the date field to 00-99. GS/OS expands this further, but the onboard clock is still limited.
https://prodos8.com/docs/technote/28/
MMX CPUs require split voltage supply. They just won't work in a standard Socket 5 motherboard hence why Pentium Overdrive MMX CPUs exist (they have the proper VRM are part of the chip).
Looking at period documents, this would sold under APDA #M7047/B. I also found references back in 1989 for an earlier document called "Script Manager Developer's Package" under APDA #M7047. This is likely an earlier revision of the document going by the order number and might also cover...
Of note, my Late 2003 15in Powerbook G4 1.25Ghz (first gen AlBook) came with a blank Apple branded DVD-R disc. I have to pull the box down the next time I'm in the attic.