It's the trouble caused by R4000 virtual address indexed/write-back cache.
Matt fixed it and I verified it had gone using my 4MAXINE+DEFTA.

Lord Isildur said;

> it panics with 'out of the TLB 
> universe' or something like that.. in 1.5.2 and 1.5.3, it wont even do
> that, it just prints out a few lines about a DMA error, link unavailable, 
> then link available.. no traffic moves... Is it a lost cause to use a
> DEFTA on a '260 in netbsd? has anyone ever known that combination
> to work? 

Toru Nishimura/ALKYL Technology