[Simh] VAX-emulation for cpus older than KA655?

[Hölscher]

Hello,

would it be possible to extend the simh VAX emulator for cpus older than the KA655, e.g. KA630?

I'd like to use the simh VAX emulator with older ULTRIX versions that do not know
(and thus do not recognize) the KA655.

Anyone else out there playing with ancient Ultrixes ???

Besides, mind the difference: 
To work with VMS - To play with Ultrix 


Regards

Ulli