Jason Thorpe wrote:
> 
>  > and variants therof with no luck (various responses).  This is
>  > with an old Matsushita (CR-503B) that I keep because I can boot
>  > old Suns off it.  Mechanically it's very tired, but logic-wise
>  > it seems A-OK.
> 
> ...can you give me an idea of what the errors are?

I'll hook it up again and give you either a transcript or a 
retraction 8)
 
> ...part of the challenge on the hp300 is dealing with scheduling
> SCSI transfers on the DMA controller, and the callback mechanism
> used to kick the HP SCSI hard once it has the DMA controller...

Hmm, how many DMA consumers are there?  I guess on another
system you could have SCSI and more than one HPIB, which would
need more than the two channels available.  Then there's the
parallel port too.
 
> I have docs on the Fujitsu chip.  I could look at making a copy
> for you.

It would be interesting at the very least; I'd like to think
I could do something useful with it, but not being that much of
a SCSI guru I suspect I'd spend some (fun) time floundering for 
a little while initially.

Of course, what would make it All Worth While (tm) would be
doing it MI using a bus.h implementation.  I'm still keen
to comprehend that 8)
 
> Jason R. Thorpe                                       thorpej@nas.nasa.gov

--
Mike Smith  *BSD hack  Unix hardware collector
The question "why are the fundamental laws of nature mathematical"
invites the trivial response "because we define as fundamental those
laws which are mathematical".  Paul Davies, _The_Mind_of_God_