Content by William R. Walsh, original here.

EduQuest TR Adapter

Looks just like an ISA version of the oh-so-common 16/4 adapter for MCA machines. Anyone ever seen the Ethernet adapter?

P1 (?) A jumper is present, over the rearmost set of pins.
S1 DIP switchblock
T1 39F6511
T2 39F6511
U1 50G6144ESD
U2 BIOS (P/N: 6263329 - probably wrong!), copyrighted 1993
U11 TC55329J-35
U12 TC55329J-35
Y1 32MHz

Notes:

Jumpers/Switches Not a clue, but I'd suspect they are similar to or the same as the ISA TR adapters.

I should find out if this adapter supports RPL. It probably does... seems that booting from a centralized server was pretty common in the educational market so as to cut costs.