Hoping to push the speed higher, I have the Apple Modem tool for creating CLL files and want to see if I can create one that will work the full 921.6kbit/s (115.2KB/s) my USB/Serial supports. Users would be people with a IIfx, Quadra 900, and Quadra 950 users, or see if I can figure out how external...

Posting here because this is one of the top search results. You can do AppleTalk over serial. https://www.savagetaylor.com/2020/12/15/appletalk-from-windows-linux-osx-to-a-68k-macintosh-using-basilisk-ii-apple-remote-access-personal-server-ara-ps-and-a-usb-serial-null-modem-cable/ I used apple remot...