1 Dec
2009
1 Dec
'09
8:21 a.m.
On 12/1/09, Pontus Pihlgren <pontus at update.uu.se> wrote:
<snip>
I'm not sure how to parse that sentence (my first language is swedish).
Sorry for that. Your written English is quite good, but I understand
that indirect and conditional expressions in English can be hard to
untangle, especially for non-native speakers/readers.
Anyway, I
have mine in the order: CPU, MEM, SLU, TERM, with
some space between for easier handling.
The order is fine, but unless you have no blank slots between the CPU
and SLU, you might have problems. Should I have space between CPU and SLU or not? And
why would i matter?
You should not have any spaces between CPU and memory and the SLU. It
matters because you need to keep the grant chain unbroken. You can
install the boards sequentially with no gaps (slot 1, slot 2, slot 3),
or you can find some M9047 Qbus grant cards to place between CPU and
memory and the SLU.
That sentence above is complex and conditional because as Pete pointed
out, you *can* have gaps in front of the BDV11 terminator - it does
not require a continuous grant chain.
If you are configuring a Qbus machine, you should have the
Microcomputer Handbook and the Microcontroller Peripherals Handbook
from the era of your equipment at hand for reference.
These machines
are not as simple to set up as modern PC hardware and have a number
of
issues that are well documented but not obvious to a new user.
-ethan