hello
> 
> SCSI yes.  Q-bus no.  Get real.  No one is going to produce cards for this
> beast since the market is so small.  You are going to have to use a commodity
> bus such as PCI to get peripherals.  If Compaq were to make a new VAX, you
> can be use it would be PCI based with no ISA.  

 yeah, as i said in my previous post. Qbus is not very fast. 
Like Matt also pointed out, being asynchronous, you cant preserve 
compatibility with the old Qbus devices and still speed things up much. 

> 
> Q-Bus is asynchronous bus.  There is little or no timing.  That makes it
> hard to speed up.

yup :-)


As for PCI, i eally hate PCI :-) 
If we really must, then let one of our nexus devices which connects to 
the spiffy hi speed TC backplane be a PCI adapter a-la unibus adapters 
weve seen in BI and SBI VAXen, 750s, and so on.. :) Then the PCI bus will 
be interfaced to the machine itself via an adapter which is a true VAX 
nexus, though we should ourselevs also produce IO devices which , for a 
higher perfoamnce and lower load on the system, (and higher price probly) 
offer ture VAX nexus devices for the same stuff. 
Then low end stuff can come with only a couple nexus slots or even none 
at all and have the PCI nexus on the motherboard, and then just have PCI 
as the peripheral interconnect. At any rate i suggest that thinsg 
on-board all be nexi. Theres more work, but it will be worth it in 
cleanliness and elegance and also scalability and lower overhead. We have 
the vast advantage architecturally in a machine that can scale to 
incredible IO like nothing else in the world except an IBM mainframe. 
Lets take dvantage of that power!