Wonderful information; thank you, although I am not sure I can then achieve my goal: to get my SE/30 to "talk" to my MacMini2,1 using Tiger in either or both directions.
My limitations:
SE/30: I can upgrade to 7.5.5 if necessary, but currently 7.5.3
MacMini2,1: Years ago I partitioned it with Snow Leopard 10.6.8 in one partition and OS X Tiger Server in the other and it is very stable, so I do not want to change it now.
Bridges:
I have a Farallon iPrint that I purchased off eBay a few years ago. It also allows my SE/30 to "see" my MacMini2,1 in the Chooser, but not connect. I am not sure which of the two versions I have and if you have information on this determination let me know.
I also have a Powerbook 1400 and YES it does have an internal port to the motherboard that allows for the somewhat rare Farallon Ethernet RJ-45 board to be installed. I have one that came installed and it also allows the SE/30 to "see" MacMini2,1 in its Chooser when connected with the Apple LocalTalk Bridge software installed. And YES: it is not a PCMCIA card and both slots are available. In one of my PB1400 eBay purchases, I did get an Ethernet PCMCIA card, but no dongle.
So to recap: my only success, short of installing Ethernet into my SE/30 is to install IPNetRouter and copy over at a reduced slow rate?
The goal is to avoid Sneakernet, once I move legacy Mac software from first my 2020 M1 Mac Mini from the Internet over WiFi to the Mac2,1 with Tiger on WiFi and then to puddle jump to the SE/30.
Am I allowed to quote your updated information from here to my Applefritter thread? Perhaps the best way is to link that thread to this one...
And my comment about dated annotations was more about the complete update of your Classic Mac Networking article, although now I see you do have a Version number, but still no date at the beginning.
Want to trade an SE/30 Ethernet PDS card for another Farallon PB1400 internal Ethernet card that I have? I do have a Farallon Etherwave AAUI that I use to use on my Laserwriter IIg. Will your card connect to this?
Thank you again!