Oh the 9058 is the "Q Bus" card with the 50 pin breakout to 34 pin and
20 pin lines for the various drives. That's not the RQDX3, and I don't
need that since I have the BA23 with a bulkhead connector.
And yes, I do remember nothing could be after a RQDX1 or 2 so they had
to be in the last unused slot on the box with a grant card needed if the
slot above and to the right was open. They do use DMA/NPG.
Off to look up the jumper settings and see if this RQDX3 is configured
properly....
CZ
On 10/29/2019 9:34 PM, Nigel Johnson via cctalk wrote:
On 29/10/2019 20:37, Chris Zach via cctalk wrote:
The M9058 can plug in to any general slot in Qbus for power and does not
past interrupt or DMA grant. Bottom/end of the bus is fine.
Interesting, I didn't realize the RQDX series boards didn't use
interrupts or DMA. Does the CPU just poll them endlessly?
RQDX1 and 2 did not pass them but used them. (Maybe not NPG) I believe
the RQDX3 did, however.
Nigel
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