23 Mar
2000
23 Mar
'00
9:43 a.m.
On Mar 23, 14:31, Chuck McManis wrote:
You mean like "this board isn't compatible
with a 22bit backplane" kinds
of
things. (which it isn't BTW, that's what the
note is about BDAL18 is
address line 18 which is called BC1 on 18 bit backplanes.)
I'm not sure how you would use it in a system with a 22 bit backplane.
Even
if you pulled the address line off the back plane the
board's CSR
registers
would show up in memory space and you would have bus
contention.
I don't believe that's true -- that board uses BBS7 to decode I/O space, so
it should appear at the correct address. The only problem is BC1, which,
like other "unused" contacts, is grounded (presumably to reduce noise).
Just cut the track from the BC1 finger. The ADV11 is listed as
"restricted compatibility", not "incompatible".
--
Pete Peter Turnbull
Dept. of Computer Science
University of York