Good News ...

Yep i think what works for 2100 (Sable and Sable-Gamma) does not
for Lynx

It seems that originally , DEC built a baseboard (sable) with 
8 EISA slots and 3 PCI slots, with a rather wreid interrupt 
configuration ... (The linux source for sable says so...).

This Baseboard could be populated with either a 21064 (Sable)
or 21164 (Sable-Gamma) ...

Then , DEC realized that so many EISA slots where not a good
idea, so they designed a new baseboard that would take the same
CPU and memory modules , but with 8 PCI slots and 3 EISA slots...
Lynx...

Most machines, like mine ... where born as Sable , and at some point 
upgraded to LYNX ... mine also got a 21164/375 Mhz in replacement
of the original 21064/275 Mhz and a new decal in front ...

I know for sure that the Linux kernel for sable does not work on
LYNX ....

I am willing to help testing .. i am bulding a cross-compliling setup 
right now ... but it is almost impossible to get info from DEC (Compaq?)
here, they barely know what's inside the machines they sell, and lack 
any tech info ...

Regards
Roberto de Iriarte
Santiago
Chile