27 Feb
1999
27 Feb
'99
2:13 a.m.
<OK, except that I still don't understand. It looks like ALL of the signal
<are bussed straight across, except the bus grant. So I still don't see
<how the first card knows that it is first, and why the second card doesn't
<erroneously think that it is first.
MVII memory use PMI AND CD slots and the CD slots are not bussed for Q.
Allison
27 Feb
27 Feb
8:16 a.m.
I wrote:
OK, except that I still don't understand. It
looks like ALL of the signal
are bussed straight across, except the bus grant. So I still don't see
how the first card knows that it is first, and why the second card doesn't
erroneously think that it is first.
Allison replied:
MVII memory use PMI AND CD slots and the CD slots are
not bussed for Q.
Yes, but the CD slots *are* bussed together.
I still can't find a single signal between the KA630 CPU board and the
pair of MS630 memory boards that is not bussed straight through between all
three cards. Other than the bus grant on the A/B Qbus connectors, which
AFAIK doesn't enter into memory addressing in any way.
So I *still* don't understand how it works.
Eric
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