I managed to configure the Turbo 16/4 in Auto 16/4 emulation
mode on machine 1)  (see my previous message.)  Now I don't
have the uvm_fault any more but the card is not working.

1) IBM 300GL with IBM Turbo 16/4 Token-Ring in Auto 16/4
   emulation mode

tr2 at isapnp0 port 0xa20/4 mem 0xc0000/16384, 0xc8000/8192 irq 9
tr2: IBM Turbo 16/4 Token-Ring ISA A Initialization incomplete, status: 20

If I try to configure the network, sysinst says:
     I can not find any network interfaces for use by NetBSD

Federico