[1][2] LANCE, short for "local area network controller for Ethernet", is also the brand name for follow-up versions of the chip.
This means you should be able use the original 16-bit software on these members of the PCnet family of single-chip Ethernet controllers.
The Am7990 can handle 10 megabit/s Ethernet with back-to-back packet reception with as little as 0.5 μs interframe spacing.
The Am7990 handles a decoded and clock-recovered Ethernet bitstream complete with a collision-detection flag.
These functions are typically handled by the companion Am7992 "Serial Interface Adapter" chip manufactured in a bipolar process.
[3] The Amiga SANA-II network interface API has poor multicast support, and this chip bug might be the reason.