:-) 
this discussion has been had onthe list a few times now.. 
supporting the chip itself is not too hard. as you discovered, it is
reasonably well documented in terms of how to poke and frob it. however,
the chip itself is just the beginning. we need a real CI implementation to
use it... and that is a lot more involved than bit-banging a chip to get
it to talk to a device. dec put a lot of infrastructure into the dssi
stuff, especially the later stuff, and while lots of infrastructure is
good if youre making essentially mainframes, it is difficult to hack
support for later! 

isildur

On Fri, 28 Nov 2003, Theo Baumgartner wrote:

> ok i have searched a bit and found this:
> 
> KA680 CPU Module Technical Manual in PDF Format
> http://deathrow.vistech.net/~cvisors/DEC94MDS/ka680tm1.pdf
> Addendum to KA680 CPU Module Technical Manual in PDF Format
> http://deathrow.vistech.net/~cvisors/DEC94MDS/ka680upc.pdf
> KA680 CPU Module Technical Manual in PDF Format in Plain Text Format
> http://deathrow.vistech.net/~cvisors/DEC94MDS/ka680tm1.txt
> Addendum to KA680 CPU Module Technical Manual in PDF Format in Plain
> Text Format
> http://deathrow.vistech.net/~cvisors/DEC94MDS/ka680upc.txt
> 
> perhaps this can help writing a driver?
> in the documents are I/O adresses, registers, etc. for the shac and much
> other cpu module things
> sorry im not a programmer, just advanced user, so i dont know what is
> needed to make such a driver.
> 
> last night i have wrote mail to hp i they can give something from
> they're archive for this shac netbsd driver attempt
> 
> theo
> -- 
> Theo Baumgartner <tbaumgartner@swissonline.ch>
>