> The VAX port bus interfaces need bus specific but VAX independent 
> mechanisms to establish and disestablish interrupts.  Even the MI
> qbus code uses scb_vecalloc which is just wrong.  There should be 
> qbus_intr_establish and qbus_intr_disestablish calls (as well as
> vsbus_intr_establish and vsbus_intr_disestablish).  
> 
Agreed. It is just not converted yet.

> IMO, that the current method of doing interrupt probing in 
> the probe routine is evil.  That is inherently platform specific
> and some devices are difficult to get to trigger an interrupt.
> 
Not agree. For the qbus/unibus, it is not a problem to generate
interrupts, merely it is needed for both the probing of device and
for assigning the correct interrupt vector. It is not platform-specific
either; it's a proberty of the bus.
For the vsbus, the interrupt autodetection is ugly, but I don't have
any idea about how to solve the problem. Both vectors and maskbits
may be different even inside the same type of machines, so there must
be a way to find this out at runtime. If you have any suggestions how
to make it better, tell me. The current way of doing it seems to work
quite well after all.

-- Ragge