26 Feb
1999
26 Feb
'99
2:18 p.m.
This would make sense to me if the wiring was such that
there were
separate address busses from the CPU to the first memory card, the first
memory card to the second memory card, etc.
But as far as I can tell, all of the signals are simply
bussed in
parallel to all of the memory cards. That's what I find baffling.
I simplified a little.
There are some extra signals which are also bussed which carry info
between boards... like whether the address was handled by the first
board or not. If so, then the second doesn't respond. If not, then
the second does the address adjustment and see if it should respond.
Megan Gentry
Former RT-11 Developer
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